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For reasons of economy, this document is printed in a limited number. Delegates are kindly asked to bring their copies to meetings and not to request additional copies.

INTERNATIONAL MARITIME ORGANIZATION

IMO

E

SUB-COMMITTEE ON FIRE PROTECTION 48th session Agenda item 3

FP 48/3 10 October 2003 Original: ENGLISH

UNIFIED INTERPRETATIONS OF SOLAS CHAPTER II-2, THE FSS CODE

AND RELATED FIRE TEST PROCEDURES

Report of the correspondence group

Submitted by Italy

SUMMARY Executive summary:

This document reports on the outcome of the work by the Correspondence Group on Unified Interpretations of SOLAS Chapter II-2, the FSS Code and Related Fire Tests Procedures

Action to be taken:

Paragraph 10

Related documents:

FP 47/16, FP 47/WP.8, FP 47/3/2, MSC 75/19/2 and MSC 76/18/2

1 The Sub-Committee, at its forty-seventh session, established a correspondence group, under the co-ordination of Italy, to progress work intersessionally on the development of unified interpretations to SOLAS chapter II-2, the FSS Code and related fire test procedures and agreed to the following terms of reference (FP 47/16, paragraph 3.25):

.1 further consider the draft unified interpretations related to the revised SOLAS chapter II-2 , taking into account document FP 47/WP.8, with a view to preparing a final list of such interpretations;

.2 further consider the draft unified interpretations related to fire test procedures

taking into account document FP 47/WP.8, with a view to preparing a final list of such interpretations;

.3 consider fire protection-related IACS unified interpretations taking into account

document FP 47/WP.8, with a view to incorporating them in the list of draft unified interpretations related to the revised SOLAS chapter II-2, as appropriate;

.4 further consider the proposed interpretations related to the FSS Code contained in

annex 2 of document FP 47/3/2; and .5 submit a report to FP 48.

FP 48/3 - 2 -

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2 The following Member Governments and non-governmental organization participated in the group:

ARGENTINA CHINA GERMANY ITALY JAPAN

NETHERLANDS REPUBLIC OF KOREA SWEDEN UNITED STATES IACS

3 The results of the work carried out by the group are summarized in the attached annexes as follows:

.1 Annex 1: Existing interpretations agreed by the group as applicable to the revised SOLAS chapter II-2;

.2 Annex 2: Existing interpretations agreed by the group as applicable to the FSS

Code; .3 Annex 3: Existing interpretations agreed by the group as applicable to the fire test

procedures; .4 Annex 4: Existing interpretations whose text or the application of which should

be, in the opinion of the group, further discussed by the Sub-Committee; and .5 Annex 5: Existing interpretations to SOLAS chapter II-2 whose application to

either the revised SOLAS chapter II-2 or the FSS Code have been considered by the group not suitable or obsolete, since they were taken into account in the revised SOLAS chapter II-2 or the FSS Code. In order to have a comprehensive list of existing interpretations being disregarded, this annex also contains the text of the existing interpretations that the Sub-Committee at its last session considered obsolete (see paragraph 6 of document FP 47/WP.8).

All the annexes contain the references to the documents giving rise to the interpretations discussed as well as a brief explanation of the actions taken by the group. The results of the discussion held by the group in respect of the fire-related IACS unified interpretations are also included in annexes 1, 2, 4 and 5, as deemed appropriate. 4 Explanatory sketches to some interpretations contained in the annexes are contained in the attached appendix. 5 In the course of the discussion, the group considered it necessary to inform the Sub-Committee on the issues highlighted in the subsequent paragraphs 6 to 9 below. 6 In reviewing paragraph 12.7 of document FP 47/16, it was noted that the Sub-Committee accepted the IACS interpretation contained in UR F35 until the Maritime Safety Committee could take action on the basis of a suitable interpretation to SOLAS regulation II-2/4.2.3.1. In this regard, the group agreed to an interpretation that is contained in annex 5. 7 The group felt that the footnote to SOLAS regulation II-2/4.5.3.3, as it stands now, is not correct. The group found that the correct footnote should read "Refer to MSC/Circ.677, as amended by MSC/Circ.1009, - Revised standards for the design, testing and locating of devices to prevent the passage of flame into cargo tanks in oil tankers, and to MSC/Circ.731 - Revised

- 3 - FP 48/3

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factors to be taken into consideration when designing cargo tank venting and gas-freeing arrangements�. The group noted that this seems to be partly in contrast with the decision previously taken by the Sub-Committee in respect of the reference to MSC/Circ.677 (see annex 6 to FP 46/WP.8; paragraph 5.24 of document FP 46/16; and paragraph 10.7 of document MSC 75/24). 8 The group decided that the interpretation to the existing SOLAS regulation II-2/5.1.6, dealing with the warning release of extinguishing medium into protected spaces, should be disregarded because it contains a simple reference to resolution A.830(19). However, it was the opinion of the group that alarms requested by the various regulations of SOLAS chapter II-2 and the FSS Code should be designed on the basis of the basic policy of the Code on Alarms and Indicators, which is already applicable to the public address and general alarm systems. 9 The group considered the opinion expressed by the Sub-Committee (FP 47/16, paragraph 3.23) that the most current standards should be used to evaluate materials in the light of the SOLAS chapter II-2 and the Fire Test Procedures (FTP) Code and that interpretations should be prepared to apply standards ISO 1182:2002 (instead of 1182:1990) and ISO 1716:2002 (instead of 1716:1973). As far as ISO 1716 is concerned, the text agreed at FP 47 (see document FP 47/WP.8, paragraph 7) is given in annex 4 with some comments of the group. In respect of ISO 1182, the majority of the group was of the opinion that, because ISO 1182:1990 is referred to in a mandatory way in annex 1, part 1, of the FTP Code, an interpretation making reference to ISO 1182:2002 may be considered an amendment to the Code. However, the group developed a possible interpretation on the matter that is contained in annex 4. Action requested of the Sub-Committee 10 The Sub-Committee is invited to approve the report in general and, in particular to:

.1 consider the results of the discussions held by the group as reflected in the

attached annexes and appendix; .2 consider the issues highlighted in paragraphs 6 to 9 above; and .3 take action as appropriate.

***

FP 48/3

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ANNEX 1

INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCES IN REVISED CHAPTER II-2 OF SOLAS 74

Revised Chapter II-2

part Reg.

Interpretation or reference Reference documents)

Comments

Regulation 1 Application

A 1.2.2.2. Interpretation of the term "First Survey"

For passenger ships, the term "first survey" relates to the first initial[1] or renewal survey for the issue of the Pas-senger Ship Safety Certificate. For ships other than pas-senger ships, the term "first survey" relates to the first initial, annual or renewal survey for the issue of the Cargo Ship Safety Equipment Certificate or any occasional sur-vey which implies the confirmation of validity of the certificate.

[1] SOLAS Regulations I/7 and I/8, and IMO Resolution A.746(18) indicate that an Initial Survey includes all the survey work necessary to issue a certificate before the ship is put in service. Therefore, a ship the keel of which is laid before 1 July 2002, but is put in service and issued a valid safety equipment or passenger safety certificate on/after 1 July 2002 (or 2003 for reg V/19.2.4) needs to comply with the regulations referenced above when it is put into service. Conversely, a ship which is put in service and issued certificates before 1 July 2002 (or 2003 for regulation V/19.2.4) has until the date of the first annual or the first renewal survey for safety equipment/passenger safety, whichever occurs first after 1 July 2002, (or 2003 for regulation V/19.2.4) to comply.

IACS UI SC171 MSC 76/18/2 FP 47/WP.8, para.19

The original text of IACS UI SC 171 has been agreed by the CG.

A 1.3.2 Examples of repairs, alterations and modifications 1 Example of substantial alteration of the dimensions

of a ship: Lengthening by adding a new midbody; the new mid-

body should comply with chapter II-2 of SOLAS 1974, as amended.

2 Example of substantial alteration of the passenger accommodation spaces:

A vehicle deck converted to passenger accommoda-tion spaces; new accommodation spaces should com-ply with chapter II-2 of SOLAS 1974, as amended.

3 Example of substantial increase of a ship's service life:

Renewal of passenger accommodation spaces on one entire deck; renewed accommodation spaces should comply with chapter II-2 of SOLAS 1974, as amended. However, in this case, means of escapes in the areas not subject to renewal are not required to be reviewed in the light of new requirements.

MSC/Circ.847 int. to reg.1.3.1

The original text of the interpretation has been basically kept except for the example in item 3. which has been slightly modified by adding the last sentence, dealing with the means of escapes (How-ever�.new re-quirements.).

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Comments

Regulation 3 Definitions A 3.1 Devices in pantries or isolated pantries containing no

cooking appliances Pantries or isolated pantries containing no cooking appli-ances may contain: - coffee automats, toasters, dish washers, microwave

ovens, water boilers, induction heaters and similar appliances each of them with a maximum power of 5 kW,

- electrically heated cooking plates and hot plates for keeping food warm each of them with a maximum power of 2 kW and a surface temperature not above 150°C.

A dining room containing such appliances should not be regarded as a pantry. (This interpretation covers regulations II-2/9.2.2.3.2.2(9), 9.2.2.4.2.2(3), 9.2.3.3.2.2(3) and 9.2.4.2.2.2(3))

MSC/Circ.847 int. to reg. 3.10

The original text of the interpretation has been basically kept as in origin but �induction heaters� have been added in the list of cooking appliances that may be contained in pantries of the type considered.

A 3.2.1 3.2.2

Application of "light-weight constructions" �Light-weight constructions� (honeycomb type, etc.) of steel or equivalent material may be used as non load-bearing internal "A" class division in accommodation and service spaces provided they have successfully passed the relevant standard fire test according to the FTP Code. These �light-weight constructions� should not be used as an integral part of main fire zone bulkheads and stairway enclosures on passenger ships.

MSC/Circ.1005 int. to reg. 3.3.1 and 3.3.2

Some editorial changes to the original text have been agreed, namely: - �lead-bearing� has been replaced by �load-bearing�; - �according to resolution A.754(18)� has been replaced by �according to the FTP Code�; - the reference to part 3 annex 1 of the Fire Test Proce-dures Code has been deleted.

A 3.9.9 Explanations to communication systems The communication systems here mean only internal communication systems which are required by the regula-tions.

MSC/Circ.847 int. to reg. 3.22-1.9

The original text has been agreed.

A 3.18 Explanations to control stations 1 Main navigational equipment includes, in particular, the steering stand and the compass, radar and direction-finding equipment. 2 Steering gear rooms containing an emergency steer-ing position are not considered to be control stations. 3 Where in the regulations of chapter II-2 relevant to fixed fire-extinguishing systems there are no specific requirements for the centralization within a control station of major components of a system, such major components may be placed in spaces which are not considered to be a control station. 4 Spaces containing, for instance, the following battery sources should be regarded as control stations regardless of the battery capacity:



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Comments

.1 emergency batteries in separate battery room for power supply from black-out till start of the emer-gency generator;

.2 emergency batteries in separate battery room as reserve source of energy to radiotelegraph installa-tion;

.3 batteries for start of the emergency generator; and .4 in general, all emergency batteries required in pur-

suance of regulation II-1/42, or regulation II-1/43. A 3.45 Devices in main pantries, pantries containing cooking

appliances and galleys 1 Main pantries and pantries containing cooking appli-ances may contain: - coffee automats, toasters, dish washers, microwave

ovens, water boilers, induction heaters and similar appliances each of them with a power of more than 5 kW,

- electrically heated cooking plates and hot plates for keeping food warm each of them with a maximum power of 5 kW.

(This interpretation covers regulations II-2/9.2.2.3.2.2(13) and 9.2.2.4.2.2(9).) 2 Spaces containing any electrically heated cooking plate or hot plate for keeping food warm with a power of more than 5 kW should be regarded as galleys.


As already done for the interpretation to reg. 3.1, �induction heaters� have been included in the equipment list. No other changes have been introduced in the original text.

Regulation 4 Probability of ignition B 4.2.1.4 Use of fuel oil having a flashpoint of 43°C or less and

crude oil or slop for tanker boilers 1 Machineries and piping systems for the usage of fuel oil having a flashpoint of 43° C or less should comply with the following: .1 provisions for the measurement of oil temperature

should be provided on the suction pipe of oil fuel pump;

.2 stop valves and/or cocks should be provided to the inlet side and outlet side of the oil fuel strainers; and

.3 pipe joints of welded construction or of circular cone type or spherical type union joint should be applied as much as possible.

2 Reference is made to IACS requirement M 24 - "Re-quirements concerning use of crude oil or slop as fuel for tanker boilers�.

MSC/Circ.847 int. to reg. 15.1.4


B 4.2.2.3.4 Controls for remote operation of the valve for emer-gency generator fuel tank The wording �separate location� does not mean separate spaces.

MSC/Circ. 1037 int. to new reg. 4.2.2.3.4


B 4.2.4 Arrangements for other flammable oils The second sentence of regulation II-2/4.2.4 is not appli-cable to hydraulic valves and cylinders located on weather decks, in tanks, cofferdams, or void spaces.

MSC/Circ. 1037 int. to new reg. 4.2.4



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Comments

B 4.4.1 Reference to IEC Publication 60092 Reference is made to IEC Publication 60092 - Electrical installations in ships.


Editorial changes (such as the correct numbering and title of the standard referred to) have been introduced in the original text.

B 4.4.2 Waste receptacles This regulation is not intended to preclude the use of containers constructed of combustible materials in gal-leys, pantries, bars, garbage handling or storage spaces and incinerator rooms provided they are intended purely for the carriage of wet waste, glass bottles and metal cans and are suitably marked.

IACS UI SC166 MSC 76/18/2 FP47/WP.8, para.19

The original text of IACS UI SC 166 has been agreed by the CG

B 4.4.3 Surface protection of insulation The fire insulation in such spaces can be covered by metal sheets (not perforated) or by vapour barrier glass cloth accurately sealed at the joint.


The wording �va-pour proof � in the original text has been replaced by �vapour barrier�.

B 4.5.1 Construction of �cofferdams� and prohibitation of containment of cargo, wastes and goods The expression �cofferdam� means, for the purpose of this regulation, an isolating space between two adjacent steel bulkhead or decks. The minimum distance between the two bulkheads or decks should be sufficient for safe access and inspection. In order to meet the single failure principle, in the particular case when a corner-to-corner situation oc-curs, this principle may be met by welding a diagonal plate across the corner (see figure of regulation 4.5.1 in the appendix). No cargo, wastes or other goods should be contained in cofferdams.

MSC/Circ.847 int. to reg. 56


B 4.5.1.1 Separation of cargo oil tanks Pump-rooms intended solely for ballast transfer need not comply with the requirements of regulation II-2/4.5.10. The requirements of regulation II-2/4.5.10 are only appli-cable to the pump-rooms where pumps for cargo, such as cargo pumps, stripping pumps, pumps for slop tanks, pumps for COW or similar pumps are provided.

MSC/Circ. 1037 int. to new reg. 4.5.1.1


B 4.5.2.2 Gastightness test for navigation bridge external doors and windows The navigation bridge external doors and windows which are located within the limits of regulation II-2/4.5.2.1 should be tested for gastightness. If a water hose test is applied, the following may be taken as a guide: - nozzle diameter: minimum 12 mm; - water pressure just before the nozzle: not less than 2

bar; and - distance between the nozzle and the doors or win-

dows: maximum 1.5 m.


The original text has been agreed with a small edito-rial correction (�2 bar� has been re-placed by �0,2 N/mm2�)

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Comments

B 4.5.3.4.1.3 Area Classification and selection of electrical equip-ment 1. Areas on open deck, or semi-enclosed spaces on open deck, within a vertical cylinder of unlimited height and 6m radius centred upon the center of the outlet, and within a hemisphere of 6m radius below the outlet which permit the flow of large volumes of vapour, air or inert gas mixtures during loading/discharging/ballasting are defined as Zone 1. Permitted electrical equipment: Certified safe type equipment for Zone 1. 2. Areas within 4m beyond the zone specified in 1 above are defined as Zone 2. Permitted electrical equipment: -Certified safe type equipment for Zone 1, -Equipment of a type, which ensures the absence of sparks, �hot spots� during its normal operation, -Equipment having an enclosure filled with a liquid di-electric, the application, or encapsulated, -Pressurised equipment, -Equipment specifically designed for Zone 2 (for example type �n� protection in accordance with IEC 60079-15). Note: Zones 1 and 2 are those defined in IEC Publication IEC 60092 Electrical installations in ships - Part 502: Tankers - Special features

Part of IACS UI SC70 (see also reg. 11.6.2.2) MSC 75/19/2 FP47/WP.8, para.19

The original text of IACS UI SC 70 has been agreed but a note has been added for clarifying that zones 1 and 2 men-tioned in the inter-pretation are those defined in IEC Publication IEC 60092-502.

B 4.5.3.4.1.4 Reference to IEC 60092-502 Electrical equipment fitted in compliance with IEC Publi-cation 60092- Electrical installations in ships - Part 502: Tankers - Special features is not considered a source of ignition or ignition hazard.

MSC/Circ.847 int. (2) to reg. 59.1.9.4


B 4.5.5.3.3 Meaning of �closed ullage system� �Closed ullage system� means a system which allows cargo measurement without breaking the integrity of the tank.



B 4.5.6.1 Location of outlets and Reference to MSC/Circ.677 and MSC/Circ.731 1 The outlets mentioned in regulation II-2/4.5.6.1 should be located in compliance with regulation II-2/4.5.3.4.1.3 as far as the horizontal distance is concerned.

MSC/Circ.847 int. (1) to reg. 59.2


B 2 Refer to MSC/Circ.677, as amended by MSC/Circ.1009, - Revised standards for the design, test-ing and locating of devices to prevent the passage of flame into cargo tanks in oil tankers, and to MSC/Circ.731 - Revised factors to be taken into consid-eration when designing cargo tank venting and gas-freeing arrangements.

MSC/Circ.847 int. (2) to reg. 59.2 MSC/Circ.450/Rev.1 replaced by MSC/Circ.731

The original text has been slightly modified with the introduction of the reference to MSC/Circ. 1009 and by the adoption of the same wording of the footnote to reg. 4.5.3.3.


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B 4.5.10.1.2 Emergency lighting Where the lighting in cargo pump-rooms can be com-monly used as the emergency lighting, this lighting should be interlocked with the ventilation systems. How-ever, this interlock should not prevent operation of the emergency lighting in case of the loss of the main source of electrical power.



B 4.5.10.1.4 Bilge level monitoring devices Bilge high-level alarms are acceptable as an alternative means for the level monitoring devices.

MSC/Circ. 1037 int. to new reg. 4.5.10.1 reg. 4.5.10.1 is only a heading, therefore added to reg. 4.5.10.1.4


Regulation 5 Fire growth potential B 5.2.2.4 Location of ventilation controls in category A machin-

ery spaces In machinery spaces of category A, controls to close off ventilation ducts and pipes should be installed with due regard to the hot gases produced by a fire in the space concerned.


This interpretation has been moved from reg. 8.3.3 to reg. 5.2.2.4 (see para. 7 of FP47/WP.8). The original text has been maintained.

B 5.3 and 6.2

Fire protection materials for cargo ships With respect to materials and components used for bulkheads in accommodation spaces as defined in regulation II-2/3.1 see table of regulations 5.3 and 6.2 in the appendix.

SC126 MSC 75/19/2 FP 47/WP.8, para.19

The content of the tables contained in IACS UI SC 70 has been agreed. The text of the interpre-tation has prepared by the CG on the basis of a similar interpretation for materials to be used on passenger ships.

B 5.3.1.1 Meaning of �cold service systems� Cold service is understood to mean refrigeration systems and chilled water piping for air-conditioning systems.

MSC/Circ.847 int. to reg.34.2, int. to reg.50.3.1

The original text has been agreed

B 5.3.2.4 Application to materials used on surfaces of bulk-heads, ceilings, linings and furniture Surfaces referred to in regulations II-2/5.3.2.4 are those of bulkheads, decks, floor coverings, wall linings and ceil-ings as appropriate. The requirements described within these regulations are not meant to apply to plastic pipes, electric cables and furniture.

MSC/Circ.965 int. to reg. 34.3, 49.1


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Regulation 6 Smoke generation potential and toxicity B 6.2 Application to materials used for bulkheads and on sur-

faces of bulkheads, ceilings, linings and furniture Surfaces referred to in regulations II-2/6.2 are those of bulkheads, decks, floor coverings, wall linings and ceil-ings as appropriate. The requirements described within these regulations are not meant to apply to plastic pipes, electric cables and furniture.

MSC/Circ.965 int. to reg. 34.7, 49.2

The original text of interp. 2 has been agreed

Regulation 7 Detection and alarm C 7.8.3 Degree of protection and audibility of two-way port-

able telephone apparatus used in special cargo spaces 1 On ships provided with special category spaces, ro-ro spaces or cargo spaces for the carriage of dangerous goods, the two-way portable telephone apparatus should be of certified safe type for use in zone 1 areas as defined in IEC Publication 60079 - Electrical Apparatus for Ex-plosive Gas Atmospheres. 2 Two-way portable telephone apparatus should be audible from most parts of the ship. As a minimum, they should be audible where the fire patrol makes their rounds such as key box locations and the routes specified on fire patrol check list. If necessary, extra antennas should be fitted to obtain effective communication.

MSC/Circ.847 int. (1) and (2) to reg. 40.6 in MSC/Circ.847 indicated as reg. 40.5 !?


Regulation 8 Control of smoke spread C 8.2 Equally effective local ventilation closing arrange-

ments for control stations Equally effective local closing arrangements means that in case of ventilators these should be fitted with fire dampers or smoke dampers which could be closed easily within the control station in order to maintain the absence of smoke in the event of fire.



C 8.3.3 Location of ventilation controls in category A machin-ery spaces In machinery spaces of category A, controls to close off ventilation ducts and pipes should be installed with due regard to the hot gases produced by a fire in the space concerned.



C 8.4 Construction and location of draught stops 1 Any of the following methods of construction may be used to construct draught stops: .1 the extension of the "B" Class bulkhead, ceiling or

lining; .2 the extension of the "C" Class bulkhead, ceiling or

lining; .3 1 mm thick minimum steel sheet, stiffened where

necessary, intermittently welded to the ship's struc-ture and the top profile of the bulkhead, or fastened mechanically to the ceilings or linings;

.4 non-combustible board type material fastened me-chanically to the ship's structure, bulkheads, ceil-ings or linings; or

.5 non-combustible mineral wool insulation, not less than 20 mm in thickness, faced on each side with expanded metal mesh, the mesh on one side being attached to the ship's structure, or expanded metal

MSC/Circ.847 int. (1), (2) and (3) to reg. 35.1.1, int. to reg. 50.3.4

The original texts have been slightly amended as fol-lows: Interp. 1 At point 1.5, �A class mineral wool insulation� has been be replaced by �non-combustible mineral wool insu-lation� because the requirements appli-cable to draught stops do not include compliance with A class standard.


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Comments

mesh may be fitted on one side and non-combustible cloth (glass-cloth) on the other side of mineral wool insulation.

Other equivalent arrangements may be accepted. 2 Draught stops are not required in public spaces with open ceilings (perforated ceilings) with openings of 40% or more and arranged in such a way that a fire behind the ceiling can be seen and extinguished.

Interp. 2 (former intrp. 3) The last part of the original sentence (�..and arranged in such a way that a fire behind the ceil-ing can be seen and extinguished�) has been deleted be-cause it was judged not relevant to the scope of draught stops (that are ar-ranged for limiting the volume of air and to minimize the draught in con-cealed spaces).

C 8.5 Arrangement of exhaust fans for smoke extraction systems The application of this regulation does not imply the ar-rangement of additional exhaust fans other than those normally dedicated to the space considered, if these latter fans are of sufficient size to meet the required capacity.


The original text has been agreed but the CG noted that the content of it is covered by para-graph 2.5 of MSC/Circ. 1034.

Regulation 9 Containment of fire C 9.2.2.1 Main vertical zones and horizontal zones

If a stairway serves two main vertical zones, the maxi-mum length of one main vertical zone should be meas-ured from the far side of the main vertical zone stairway enclosure. In this case, all boundaries of the stairway enclosure be insulated as main vertical zone bulkheads and access doors leading into the stairway should be pro-vided from the zones (see figures 1 to 4 of regulation 9.2.2.1 in the appendix). However, the stairway should not be included in calculating the size of the main vertical zone if it is treated as its own main vertical zone.


The original text has been agreed. It has also been agreed that the basic intent of this inter-pretation, consid-ered at the time of its development for the protection of boundaries of these stairways, was that one boundary should be a true fire zone boundary and that the other only need to meet the A-60 insulation requirement.

C 9.2.2.2.3 Bulkheads within a main vertical zone Refer to MSC/Circ. 917


The original text has been replaced by a reference to MSC/Circ.917

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C 9.2.2.3.2.2 (7)

Electrical distribution boards Distribution boards may be located behind panels/linings within accommodation spaces including stairway enclo-sures, without the need to categorize the space, provided no provision is made for storage. If distribution boards are located in an identifiable space having a deck area of less than 4m2, this space may be categorised in (7), according to regulation 9.2.2.3.2.2, or (5), according to regulations 9.2.2.4.2.2, 9.2.3.3.2.2 and 9.2.4.2.2.2

SC167 MSC 76/18/2 FP47/WP.8, para.19

The original text of IACS UI SC 167 has been agreed but a modification has been introduced to the last line in order to render this inter-pretation applicable to all ships (not only passenger ships carrying more than 36 passengers).

C 9.2.2.3.2.2 (7)

Devices in diet kitchens Diet kitchens (containing no open flame) should be in compliance with the interpretation for pantries as stated under regulation II-2/3.1.

MSC/Circ.847 int. to reg. 26.2.2 (7)


C 9.2.2.4.2.2 (5)


SC167 MSC 76/18/2 FP47/WP.8, para.19


C 9.2.2.4.5 Construction and arrangements of saunas The space categories mentioned in reg. 9.2.2.3.4.1 should be replaced, when applying this regulation, by (5), (7) and (10).-

MSC/Circ.847 int. to 27.2.2 (9)

The original text has been slightly modified for render it more comprehen-sible.

C table 9.3 table 9.4

Interpretation of machinery spaces having little or no fire risk For the definition of machinery spaces having little or no fire risk in footnote "f" see regulation II-2/9.2.2.3.2.2 (10).

MSC/Circ.847 int. (1) to tables 27.1 and 27.2


C 9.2.3.1.1.3 Increased area of public spaces The area of public spaces may be permitted to increase up to 75 m2.



C 9.2.3.2.4 Increased area of public spaces The area of public spaces may be permitted to increase up to 75 m2.

MSC/Circ. 847 int. to reg. 43.4



Interpretation of machinery spaces having little or no fire risk For the definition of machinery spaces having little or no fire risk in footnote "i" see regulation II-2/9.2.2.3.2.2 (10).

MSC/Circ.847 int. to table 44.2 note �i�


C 9.2.3.3.2.2 (5)

Electrical distribution boards Distribution boards may be located behind panels/linings within accommodation spaces including stairway enclo-

SC167 MSC 76/18/2

The original text of IACS UI SC 167 has been agreed but


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Comments

sures, without the need to categorize the space, provided no provision is made for storage. If distribution boards are located in an identifiable space having a deck area of less than 4m2, this space may be categorised in (7), according to regulation 9.2.2.3.2.2, or (5), according to regulations 9.2.2.4.2.2, 9.2.3.3.2.2 and 9.2.4.2.2.2

FP47/WP.8, para.19

a modification has been introduced to the last line in order to render this inter-pretation applicable to all ships (not only passenger ships carrying more than 36 passengers).


MSC/Circ.847 int. to reg. 44.2.2(9)

The original text has been slightly modified for render-ing it more compre-hensible.

C 9.2.3.4.1 Construction of protected stairways The required protection of stairways penetrating more than a single deck can be achieved by: .1 a stairway enclosure allowing access from one stair

to a superimposed stair within such enclosure, the entrances to which should consist self-closing "A" class fire doors at each deck level (see figure 1 of regulation II-2/9.2.3.4.1 in the appendix); or

.2 a stairway enclosure enclosing the stairs only, in

combination with self-closing "A" class fire doors at each deck-level and at each end of a stair. No re-quirements apply to the stairs except that they should be of steel frame structure or be made of equivalent material (see figure 2.1 of regulation II-2/9.2.3.4.1 in the appendix); or

.3 stairways that penetrate only one single deck shall be protected, at a minimum, at one level by at least �B-0� class division and self-closing doors (see figure 2.2 of regulation II-2/9.2.3.4.1 in the appendix).


The original text text of paragraph 1.3 has been changed in order to put it in line with the basic requirement of reg. II-2/9.2.3.4. No changes have been introduced in paragraphs 1.1 and 1.2.

C 9.2.3.4.1 Construction of dumb-waiters Dumb-waiters are to be regarded as lifts.


The original text of int. 2 to reg. II-46.1 has been agreed and included under a new title.

C 9.2.4.2.2.2 (5)


SC167 MSC 76/18/2 FP47/WP.8, para.19


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MSC/Circ.847 int. to 58.2.2 (9)

The original text has been slightly modified for render it more comprehen-sible.


Interpretation of machinery spaces having little or no fire risk For the definition of machinery spaces having little or no fire risk in footnote "e" see regulation II-2/9.2.2.3.2.2 10).

MSC/Circ.847 int. to table 58.2 note �e�


C 9.3.1

Reference to resolution A.753(18) Reference is made to resolution A.753(18) � Guidelines for the application of plastic pipes on ships.

MSC/Circ.847 int. (1).1.3 to reg. 18.2.1

The title of the interpretation has been changed (dele-tion of the last sen-tence) in accor-dance with para. 6 of FP47/WP.8). The CG agreed to keep the original text bearing in mind that this is a reference to the words �steel of equivalent material� used in the second sentence of the regulation.

C 9.3.4 Prevention of heat transmission by insulation and structural details for drainage 1 Details measures to be adopted for avoiding heat transmision at intersections and terminal points of insulation of decks or bulkheads are given in figures 1 and 2 of regulation 9.3.4 in the appendix. Altenative details may be accepted provided that the effectiveness of such design is verified by an appropriate test in the same manner as those specified in the FTP code. 2 In case where the lower part of insulation has to be cut for drainage, the construction should be in accordance with the structural details as given in figure 3 of regula-tion 9.3.4 in the appendix.

MSC/Circ.847 int. (1) to reg. 26.4 (last part of the sentence modified and adapted) MSC/Circ.847 int. (3) to reg. 26.4

Interp. 1 The last sentence has been added for allowing the use of different designs, if they are proved suitable according to the FTP Code. More-over, the relevant sketches in the Appendix has been updated as agreed by the WG at FP47 (see para. 7 of FP47WP.8) Interp. 2 The origi-nal text was agreed

C 9.4.1.1 Reference to MSC/Circ.541 Reference is made to MSC/Circ.541 - Guidance notes on the integrity of flooding boundaries above the bulkhead deck of passenger ships for proper application of

MSC/Circ.847 int. to reg. 30.7 (reference only)

In FP47/3/2 this interpretation was related to reg. 9.4.1.1.7 but the CG


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regulations II-1/8 and 20, paragraph 1, of the 1974 SOLAS Convention, as amended.

felt that it should be related to reg. 9.4.1.1. The original text has been agreed.

C 9.4.1.1.2 Doors in divisions of a higher standard and fire testing of watertight doors


The last sentence referring to to MSC/Circ. 541 (para. 5 of which is applicable to fire protection) has been added.

C 9.4.1.1.2 Doors in divisions of a higher standard and fire testing of watertight doors 1 Where required divisions are replaced by divisions of a higher standard, the door need only conform to the required division. 2 Watertight doors constructed in accordance with SOLAS regulation II-1/15 and fitted below the bulkhead deck that are required to be watertight need not be tested to the Fire Test Procedures Code provided that the doors meet the requirements for water tightness in SOLAS regulation II-1/18. Doors fitted above the bulkhead deck which are required to meet both the fire protection and watertight requirements (see MSC/Circ. 541) shall be tested to the Fire Test Procedures Code.


Interp. 1: The origi-nal text has been agreed Interp. 2: The last sentence, referring to to MSC/Circ. 541 (para. 5 of which is applicable to fire protection), has been added.

C 9.4.1.1.4.6 Lift door indicators located in continuously manned central control station Lift door indication signals should meet the following: .1 the signal showing that "A" class lift doors are in the

closed position should be activated only when the or-der to close the main fire doors has been given by the continuously manned central control station;

.2 when there are several lifts giving access to the same stairway, the lift door indicators located in the continuously manned central control station should be capable of indicating that all the lift doors giving access to the same landing are properly closed. This indication should be shown on the panel; and


Item .3 of the original text has been deleted because, for lift doors that are fire doors (e.g. doors of lifts not located in stairway enclosures or, if lifts are part of stairway enclosures, not opening in such enclosures) it may be considered in conflict with reg. 9.4.1.1.3.

C 9.4.1.1.8 Type of means of manual closing of fire dampers Manual closing may be achieved by mechanical means of release or by remote operation of the fire damper by means of a fail-safe electrical switch or pneumatic release (spring-loaded, etc.) on both sides of the division.



C 9.4.1.3 Reference is made to the following ISO standards: ISO 614:1989 Shipbuilding and marine structures -

Toughened safety glass panes for rectan-gular windows and side scuttles - Punch method of non-destructive strength

testing



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ISO 1095:1989 Shipbuilding and marine structures -

Toughened safety glass panes for side scuttles

ISO 1751:1993 Shipbuilding and marine structures - Ship's side scuttles

ISO 3254:1989 Shipbuilding and marine structures - Toughened safety glass panes for rectan-gular windows

ISO 3903:1993 Shipbuilding and marine structures - Ships' ordinary rectangular windows

ISO 3904:1990 Shipbuilding and marine structures - Clear view screens

C 9.4.2.1 Doors in divisions of a higher standard

Where required divisions are replaced by divisions of a higher standard, the door need only conform to the required division.



C 9.7 Definition of �free sectional area� The term �free sectional area� means, even in the case of a pre-insulated duct, the area calculated on the basis of the inner diameter of the duct.

MSC/Circ.847 int. (1) to 16.2

The original text has been agreed. However, in respect of the text present in FP47/3/2, the following changes have been introduced: - reference to inter-pretation to reg. 9.7.1.1, referred to in the sentence in brackets, has been deleted since such an interpretation is not present; - in order to avoid to repeat the same text for different regulations, this interpretation has been referred to reg. 9.7 only.

C 9.7.3.1.2 Type of means of closing Manual closing may be achieved by mechanical means of release or by remote operation of the fire damper by means of a fail-safe electrical switch or pneumatic release (spring-loaded, etc.) on both sides of the division.

MSC/Circ.847 int. (1) to reg. 16.2.2


C 9.7.4.3 Ventilation system penetrating decks A duct, irrespective of its cross section, serving more than one tweendeck should be fitted, near the penetration of each deck served, with a fire or smoke damper.




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Such dampers should close automatically by means of a fusible link or other suitable device, and manually from the deck in which the passage of smoke, due to a fire in the deck immediately below which is served by the same duct, will be avoided. Where, within a main vertical zone, a fan serves more than one tweendeck through separate ducts, each of these dedicated to a single tweendeck, each duct should be provided with a manually operated smoke damper fitted close to the fan.

C 9.7.5.1.2 Meaning of �lower end of the duct� and �upper end of the duct� in galley range ducts 1 �Lower end of the duct� means a position at the junc-tion between the duct and the galley range hood. (See also interpretation of regulation II-2/41-2.4.3.2.) 2 �Upper end of the duct� means a position close to the outlet of the duct.

MSC/Circ.847 int. (1) and (2) to reg. 32.1.9.2


C 9.7.5.1.5 Location of hatches for inspection and cleaning in galley range ducts 1 One hatch should be provided close to the exhaust fan. 2 In the galley exhaust duct, the grease will accumulate more in the lower end. Therefore, hatches should be fitted also in this part of the duct.



Regulation 10 Fire fighting C 10.2.1.5.1 Location of hydrant in machinery spaces

At least one hydrant with hose, nozzle and coupling wrench should be provided in machinery spaces of cate-gory A.



C 10.2.2.3.2.2

Electrical cables for the emergency fire pump

The electrical cables to the emergency fire pump are not to pass through the machinery spaces containing the main fire pumps and their source(s) of power and prime mover(s). They are to be of a fire resistant type, in accor-dance with IACS unified Requirement E 15 Electrical Services Required to be Operable Under Fire Conditions and Fire Resistant Cables, par.1, where they pass through other high fire risk areas.

SC165 MSC 76/18/2 FP47/WP.8, para.19

The original text of IACS UI SC 165 has been agreed but the existing refer-ence to �E.15 � has been changed to �IACS unified Re-quirement E 15 -Electrical Services Required to be Operable Under Fire Conditions and Fire Resistant Ca-bles�

C 10.2.2.3.3 Connection of a pump to fire main This paragraph does not force designers to choose pumps with capacity and pressure characteristics other than that being optimal for the service intended, just to make their connection to the fire main possible, provided the re-quired number and capacity of fire pumps are already fitted.

SC97 MSC 76/18/2 FP47/WP.8, para.19

The original text of IACS UI SC 97 has been agreed.

C 10.4.3 Storage rooms for fire-extinguishing medium The following requirements are applicable only for the storage rooms for fire-extinguishing media of fixed gas

MSC/Circ. 1037 int. to new reg. 10.4.3

The last sentence of the original text (Refer to SOLAS

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fire-extinguishing systems: .1 the storage room should be used for no other pur-

poses (last part of the first sentence*); .2 if the storage space is located below deck, it should

be located no more than one deck below the open deck and should be directly accessible by a stairway or ladder from the open deck (3rd sentence);

.3 spaces which are located below deck or spaces where access from the open deck is not provided, should be fitted with a mechanical ventilation sys-tem designed to take exhaust air from the bottom of the space and should be sized to provide at least 6 air changes per hour (4th sentence); and

.4 access doors should open outwards, and bulkheads and decks including doors and other means of clos-ing any opening therein, which form the boundaries between such rooms and adjacent enclosed spaces should be gas tight (5th sentence).

* Refer to SOLAS regulation II-2/10.4.3.

regulation II-2/10.4.3) has been deemed useless and then deleted.

C 10.5 Fire extinguishing arrangements in machinery spaces The number of systems, appliance and extinguisher re-quired by regulation 10.5 are summarized in the table of regulation 10.5 in the appendix.

SC30 MSC 75/19/2 FP47/WP.8, para.19

The content of the table contained in IACS UI SC 30 has been agreed. How-ever, a reference to local application systems has been added in such a table. The text of the interpretation has been prepared by the CG.

C 10.5.2.2.2 Relaxations of fire-extinguishing equipment for cargo ships A relaxations for cargo ships should be accepted as fol-lows: - The 45 l foam type extinguisher or its equivalent may

be arranged outside of the space concerned.

MSC/Circ.847 int. to reg. 7.2.3 para. 7 of FP47/WP.8)

Title and text of the interpretation have been amended in accordance with para. 7 of FP47/WP.8)

C 10.7.1.3 Cargo spaces for which a fixed fire-extinguishing sys-tem is ineffective and reference to MSC/Circ.671 For cargoes for which a fixed gas fire-extinguishing system is ineffective and for which a fire-extinguishing system giving equivalent protection should be available, reference is made to MSC/Circ.671, annex, table 2.



Regulation 11 Structural integrity C 11.3.1 Insulation of aluminium decks and interpretation of

�load-bearing divisions� 1 If an aluminium deck is tested with insulation in-stalled below the deck, then the result will apply to decks which are bare on the top. Aluminium decks may not be provided with deck coverings on the top unless tested with the deck covering, to verify that the 200°C tempera-ture of the aluminium is not exceeded. However, when

MSC/Circ.915 int. to reg. 23.2.1, 42.2

The original text has been slightly amended as fol-lows: - in the second sentence, the word-ing �or insulation� has been deleted to


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needed, any approved primary deck covering (not spe-cifically the one used during the standard fire test of the deck) may be used for meeting this requirement.

avoid confusion between fire insula-tion and deck cover-ing ; - a third sentence has been included for clarifying that any approved pri-mary deck covering (not specifically the one used during the standard fire test of the deck) may be used for meeting this interpretation.

2 When spaces of category (1) to (10) in regulation II-2/9.2.2.3 or of category (1) to (5) and (10) in regulation II-2/9.2.2.4 are located on top of aluminium decks, the deck does not need to be insulated from the upper side, provided the deck is protected by an approved deck covering.

MSC/Circ. 847 int. (1) to reg. 23.2.1

The original text was basically agreed. The word-ing �readily ignit-able�, referring to the deck covering, has been replaced by �approved�

3 �Load-bearing division� is a deck or bulkhead includ-ing stiffeners, pillars, stanchions and other structural members which, if eliminated, would adversely affect the designated structural strength of the ship.



C 11.6.2.2 Area Classification and selection of electrical equip-ment 1. Areas on open deck, or semi-enclosed spaces on open deck, within 3m of cargo tank ventilation outlets which permit the flow of small volumes of vapour, air or inert gas mixtures caused by thermal variation are defined as Zone 1. Permitted electrical equipment: -Certified safe type equipment for Zone 1. 2. Areas within 2m beyond the zone specified in 1 above are defined as Zone 2. Permitted electrical equipment: -Certified safe type equipment for Zone 1, -Equipment of a type, which ensures the absence of sparks, �hot spots� during its normal operation, -Equipment having an enclosure filled with a liquid di-electric, the application, or encapsulated, -Pressurised equipment, -Equipment specifically designed for Zone 2 (for example type �n� protection in accordance with IEC Publication 60079-15). Note: Zones 1 and 2 are those defined in IEC Publication IEC 60092 Electrical installations in ships - Part 502: Tankers - Special features

Part of SC70 (see also reg. 4.5.3.4.1.4) MSC 75/19/2 FP 47/WP.8, para.19

Some editorial corrections have been included.

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C 11.6.2.2 Electrical equipment in areas next to cargo tank venti-lation outlets which permit flow of small volumes of vapour Permitted electrical equipment: .1 Areas on open deck within 3 m of cargo tank venti-

lation outlets which permit the flow of small vol-umes of vapour caused by thermal variation:

- certified safe type equipment. .2 Areas 2 m beyond the zone specified in .1 above:

- certified safe type equipment; or - equipment of a type which ensures absence of sparks or arcs and absence of ignition capable surface during normal operation; or - equipment specifically designed for zone 2 as de-fined in IEC Publication 60092 Electrical installa-tions in ships - Part 502: Tankers - Special features .

MSC/Circ.847 int. to reg. 59.1.7.2

The original texts have been agreed. Reference to IEC publication 60092 has been added at the end of int. 2.

Regulation 13 Means of escape D 13.3.2.4.1 Means of escape

The stairway arrangement required by regulation II-2/13.3.2.4.1 for below bulkhead deck compartments of one main vertical zone can be arranged by: - one enclosed stairway which provides a continuous fire

shelter from the level of its origin to the embarkation deck in one watertight compartment;

- each of the other compartments have an enclosed stairway which provides a continuous fire shelter from the level of its origin to the bulkhead deck; and

- the continuous fire shelter is also provided on the bulk-head deck trough a route protected as a category 2 space (horizontal stairway)

(see figure of regulation 13.3.2.4.1 in the appendix). In applying this interpretation, the content of reg. 13.3.2.1.1 shall also be taken into account


The original text has been amended by adding the last sentence. This sen-tence is aimed to underlined that wt compartments are still required to have two independ-ent means of es-capes and the appli-cation of the inter-pretation should not lead to ignore this basic requirement. In fact, if both the escape paths men-tioned in the first and second sen-tences lead to the same horizontal stairway, then the concerned wt com-partments would have only one means of escape.

D 13.3.2.4.4 Size of enclosed means of escape in atriums Such enclosed means of escape should be sized taking into account the total number of persons at each level of the atrium considered.

MSC/Circ.847 int. to reg. 28.1.8 modified and adapted to new regulation



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D 13.3.3 Locking arrangements and accessibility to embarka-tion decks 1 The escape routes are routes for escape and also for access. Accordingly, the locking arrangement should be such that it does not obstruct these two objectives (escape and access). Doors along any designated escape routes which require keys to unlock them when moving in the direction of escape should not be permitted. 2 The embarkation deck should be accessible from the open decks to which escapes routes lead.

MSC/Circ.847 int. (1) and (2) to reg. 45

The last sentence of int. 1 has been modified in order to better clarify its intent. The original text of int. 2 has been agreed.

D 13.4.1.1.1 Arrangement of means of escape (passenger ships) Ladders having strings of flexible steel wire ropes are not acceptable in such escape routes.

MSC/Circ.847 int. (2) to reg. 28.3.1.1.1


D 13.4.2.1.1 Arrangement of means of escape (cargo ships) Ladders having strings of flexible steel wire ropes are not acceptable in such escape routes.

MSC/Circ.847 int. (2) to 45.3.1


D 13.7.4 Reference to MSC/Circ.1033 Reference is made to MSC/Circ.1033 - Interim Guidelines for evacuation analysis for new and existing passenger ships.

MSC/Circ.909 in footnote to new reg. 13.7.4 re-placed by MSC/Circ.1033


Regulation 15 Instructions, onboard training and drills 15.2.4 Reference to resolution A.xx(23)

Reference is made to Assembly Resolution A.XX (23) � Graphical symbols for shipboard fire control plans

new MSC/Circ.1055 added

MSC77 approved the text of a draft Assembly resolu-tion, replacing res. A.653(16), for its adoption by the Assembly at its 23rd session. Reference to res. A.653(16) and MSC/Circ. 1050 have been replaced in the original text by a reference to this new assembly reso-lution whose final numbering should be added at FP48.

Regulation 19 Carriage of dangerous goods G 19.2.2.2 Meaning of �purpose-built container spaces�

A purpose-built container space is a cargo space fitted with cell guides for stowage securing of containers.

MSC/Circ.847 int. to reg. 54.1.2.2.


G 19.2.2.3 Extended meaning of �ro-ro spaces� Ro-ro spaces include special category spaces (see regula-tion II-2/20).


The original text was amended by deleting the reference to

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"vehicle spaces" because vehicle spaces may include lift-on/lift-off cargo spaces such as cargo spaces carrying platform containers with vehicles with fuel and the requirements of reg.19.3.9 and 19.3.10 are applicable only to the spaces into and from which cargoes can be loaded/unloaded or vehicles can be driven.

G 19.3.1 Water supplies for open-top container spaces in ships 1 The water spray system required in paragraphs 9.2, 9.3 and 9.4 of MSC/Circ.608/Rev.1 - Interim guidelines for open-top container ships - will also satisfy the requirement for dangerous goods. 2 The amount of water required for fire-fighting pur-poses in the largest hold should allow simultaneous use of the water spray system plus four jets of water from hose nozzles.

MSC/Circ.847 int. to reg. 54.2.

The original texts have been agreed except that the ref-erence to MSC/Circ. 608/Rev.1, included in the original text of int. 2, that it has been deleted.

G 19.3.1.2 Hydrants for dangerous goods The number and position of hydrants should be such that at least two of the required four jets of water, when sup-plied by single lengths of hose, may reach any part of the cargo space when empty; and all four jets of water, each supplied by single lengths hose may reach any part of ro-ro cargo spaces.

SC168 MSC 76/18/2 FP47/WP.8, para.19

The original text of IACS UI SC 168 has been agreed.

G 19.3.1.4 Acceptance of high expansion foam systems in case of dangerous goods A high expansion foam system, complying with the FSS-Code chapter 6 section 2.2, is acceptable, except if cargoes dangerously react with water (see IMDG Code).



G 19.3.2 Reference to 60092 - 506 Reference is made to the recommendations of the Interna-tional Electrotechnical Commission, in particular, IEC Publication 60092 Electrical installations in ships � Part 506: Special feature- Ships carrying specific dangerous goods and materials hazardous only in bulk

MSC/Circ.847 int. to reg. 54.2.2 replaced by foot-note to new reg. 19.3.2

Editorial changes (such as the correct numbering and title of the standard referred) have been introduced in the original text.

G 19.3.4 Ventilation requirements for individual cargoes and open-top container cargo holds 1 General If adjacent spaces are not separated from cargo spaces by gastight bulkheads or decks, ventilation requirements should apply as for the cargo space itself, required under regulation II-2/19.3.4.2 and its interpretations.




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2 Requirements for Individual Cargoes .1 Cargoes liable to give off vapours or gases which can

form an explosive mixture with air (See the BC Code, Appendix B, e.g. IMO Class 4.3 materials): Two separate fans should be permanently fitted or be-ing of a portable type adapted for being permanently fitted prior to loading and during voyage. The fans should be either explosion proof or arranged such that the escaping gas flow is separated from electrical ca-bles and components. The total ventilation should be at least six air changes per hour, based upon the empty space. Ventilation should be such that any es-caping gases cannot reach living spaces on or under deck.

.2 Cargoes liable to spontaneous combustion (only applicable to seed cake (b) and (c)): Two separate fans should be permanently fitted or be-ing of a portable type adapted for being permanently fitted prior to loading and during voyage. The fans should be either explosion proof or arranged such that the escaping gas flow is separated from electrical ca-bles and components. The total ventilation should be at least six air changes per hour, based upon the empty space. Ventilation should be such that any es-caping gases cannot reach living spaces on or under deck.

3 For open-top container ships Power ventilation should be required only for the lower part of the cargo hold for which purpose ducting is re-quired. The ventilation capacity should be at least two air changes per hour, based on the empty hold volume below weather deck.

G 19.3.4.2 Degree of protection of exhaust fans and use of wire mesh guards 1 Exhaust fans should be of non-sparking type in ac-cordance with IACS Requirement F 29, as revised. 2 The purpose of "suitable wire mesh guards" is to pre-vent foreign objects from entering into the fan casing. The standard wire mesh guards should have a size of 13 mm x 13 mm.



G 19.3.5.4 Arrangements of bilge drainage systems for cargo spaces Electrical equipment in the space should comply with IEC Publication 60092.- Electrical installations in ships


The original text of the interpretation has bee modified by using IEC publica-tion as in new reg. 19.3.2

G 19.3.6.1 Type and suitability of protective clothing 1 When selecting the protective clothing the danger of the chemicals according to the class and liquid or gaseous state should be taken into account. 2 The required protective clothing is for emergency purposes.



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3 For solid bulk cargoes the protective clothing should satisfy the equipment requirements specified in Appendix E of the BC Code for the individual substances. For packaged goods the protective clothing should satisfy the equipment requirements specified in emergency procedures (EmS) of the Supplement to IMDG Code for the individual sub-tances.

G 19.4 Certification of special dangerous goods Certification for carriage of solid dangerous bulk cargoes covers only those cargoes listed in Appendix B of the BC Code except cargoes of MHB. Other solid dangerous bulk cargoes may only be permitted subject to acceptance by the Administrations involved.


The reference to MSC/Circ. 642 in the title has been deleted The original text of interp. 2 to reg. 19.4 has been agreed

Regulation 20 Protection of vehicle, special category and ro-ro spaces G 20.2.2.1 Horizontal fire zone concept

The "total overall clear height" is the sum of distances between deck and web frames of the decks forming one horizontal zone.

SC158 The original text of IACS UI SC 158 has been agreed.

G 20.3.1.1 Reference to MSC/Circ.729 Reference is made to MSC/Circ.729 - Design guidelines and operational recommendations for ventilation systems in ro-ro cargo spaces.

MSC/Circ.847 int. to reg. 37.1.6.1, 53.2.3.1

The original text has been agreed as referring to reg. 20.3.1.1 instead of reg. 20.3.1

G 20.3.1.3 Alarm in case of loss of ventilation capacity The requirement to indicate any loss of ventilating capac-ity is considered complied with by an alarm on the bridge, initiated by fall-out of starter relay of fan motor.

MSC/Circ.847 int. to reg. 37.1.6.3, 38.3.3, 53.2.3.3


G 20.3.1.4.2 Arrangement and construction of ventilation ducts on cargo ships Ventilation ducts should not pass through machinery spaces of category A unless fire insulated to A-60 standard.


The title has been slightly changed by adding �cargo ships� at the end. The original has been agreed.

G 20.3.2.2 Degree of protection of electrical equipment 450 mm above deck For equipment above a height of 450 mm above deck the degree of protection of electrical equipment required by this regulation will be realised: .1 by an enclosure of at least IP 55 as defined in IEC

Publication 600529 - Classification of Degree of Protection Provided by Enclosures; or

.2 by apparatus for use in zone 2 areas as defined in Publication 60079 - Electrical Apparatus for Explo-sive Gas Atmospheres (Temperature class T3).

MSC/Circ.847 int. (1) to reg. 37.2.2.1, int. to reg. 53.2.4.2 interpret. to reg. 53.2.4.2 contains only para .1



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G 20.3.3 Degree of protection of electrical equipment in exhaust ventilation ducts and of exhaust fans 1 The electrical equipment referred to in these regula-tions should be of certified safe type and wiring, if fitted, and should be suitable for use in zone 1 areas as defined in IEC Publication 60079 - Electrical Apparatus for Ex-plosive Gas Atmospheres (Gas group II A and tempera-ture class T 3). 2 Exhaust fans should be of non-sparking type in ac-cordance with IACS Requirement F 29, as revised.

MSC/Circ.847 int. (1) and (2) to reg. 37.2.2.2, 37.3.2.2, 38.4.2 53.2.4.4


G 20.4.1 Arrangements for disconnecting detector sections during loading and unloading The smoke detector sections in vehicle, special category and ro-ro spaces may be provided with an arrangement, e.g. a timer, for disconnecting detector sections during loading and unloading of vehicles to avoid "false" alarms. The time of disconnection should be adapted to the time of loading/unloading. The central unit should indicate whether the detector sections are disconnected or not. However, manual call points should not be capable of be-ing disconnected by the arrangements referred to above.

MSC/Circ.847 int. (1) and (2) to reg. 37.1.4.1, int. to reg. 53.2 interpretations combined

Editorial modifica-tions have been carried out.: - the first sentence

of original int. 1 has been deemed unnecessary and then deleted;

- the meaning of the reference to �these spaces� in the second sen-tence of original int. 1 has been clarified;

- the text of inteprs 1. and 2. have been combined.

G 20.6.1.4.1.1

Sizing of scuppers and drainage pumps For the sizing of scuppers and drainage pumps the capac-ity of both the water spraying system pumps and the water discharge from the required number of fire hose nozzles specified in regulation II-2/10.2.1.5.1 and II-2/19.3.1, as applicable, should be taken into account.



***

FP 48/3

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ANNEX 2

INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCES IN THE FIRE SAFETY SYSTEMS CODE

New FFS Code Chap. Para.

Interpretation or reference Reference documents

Comments

3 Personnel protection 3 2.1.1.4 Reference to IEC Publication 79

Reference is made to IEC Publication 60079- Electrical Apparatus for Explosive Gas Atmospheres.

MSC/Circ. 847 int. to reg. 17.1.1.4

Editorial changes (such as the correct numbering and title of the standard referred) have been introduced in the original text.

4 Fire extinguishers 4 -- Reference to resolution A.602(15)

Reference is made to resolution A.602(15) - Revised Guidelines for marine portable fire extinguishers.

MSC/Circ. 847 int. to reg. 6


4 2.1.1.2 Equivalents of fire extinguishers Reference is made to the international standard on fire protection equipment - portable fire extinguisher -performance and construction, to be developed by ISO. (ISO/DIS 7156E)

MSC/Circ. 847 int. to reg. 6.1.2

The original text has been agreed but the CG is of the opinion that the ISO standard should be referred to in the text as soon as it reaches the International Standard stage (it should not be referred to at the Draft International Standard stage).

4 3.1.2 Recharging of spare charges Partially emptied extinguishers should also be recharged.

MSC/Circ. 847 int. (3) to reg. 6.2 last sentence

The original text has been agreed. In FP47/3/2, this interpretation was referred to paragraph 2.1.2 but the CG found more appropriate to refer it to paragraph 3.1.2.

5 Fixed gas fire-extinguishing systems Fire extinguishers 5 2.1.1.1 Separation of spaces

Two spaces can be considered as separated spaces where fire divisions as required by regulations II-2/9.2.2, 9.2.3 and 9.2.4, as appropriate, or divisions of steel are provided between them.




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Comments

5 2.1.1.3 Means for checking the quantity of medium in containers Means for checking the quantity of medium in containers should be so arranged that it is not necessary to move the containers completely from their fixing position. This is achieved, for instance, by providing hanging bars above each bottle row for a weighing device or by using suitable surface indicators.


The original text of interp. 1 has been agreed.

5 2.1.3.2 Certain spaces for which the automatic warning of release of the extinguishing medium is required: Ordinary cargo holds need not comply with regulation 2.1.3.2. However, ro/ro cargo spaces, holds in container ships equipped for integrated reefer containers and other spaces where personnel can be expected to enter and where the access is therefore facilitated by doors or manway hatches shall comply with the above regulation. .

SC25 MSC 75/19/2 FP47/WP.8, para.19

The text of the first interpretation contained in the IACS UI SC25 has been agreed with the following modifications: - the reference to reg. II-2/5.1.6 has been changed to regulation 2.1.3.2 - the last part relevant to the exemption for small spaces to be provided with pre-discharge alarm has been found already covered the text of reg. 2.1.3.2 of Chapter 5 of the FSS Code and therefore it has been disregarded.

5 2.2 Low pressure CO2 systems Where a low pressure CO2 system is fitted to comply with this regulation, the following applies: 1. The system control devices and the refrigerating plants should be located within the same room where the pressure vessels are stored. 2. The rated amount of liquid carbon dioxide should be stored in vessel(s) under the working pressure in the range of 1.8 to 2.2 N/mm2. The normal liquid charge in the container should be limited to provide sufficient vapour space to allow for expansion of the liquid under the maximum storage temperatures than can be obtained corresponding to the setting of the pressure relief valves but should not exceed 95% of the volumetric capacity of the container. 3. Provision should be made for: - pressure gauge; - high pressure alarm: not more than setting of the relief valve; - low pressure alarm: not less than 1.8 N/mm2;

SC170 MSC 76/18/2 FP47/WP.8, para.19

The original text of IACS UI SC170 has been agreed.

FP 48/3 ANNEX 2

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Comments

- branch pipes with stop valves for filling the vessel; - discharge pipes; - liquid CO2 level indicator, fitted on the vessel(s); - two safety valves. 4. The two safety relief valves should be arranged so that either valve can be shut off while the other is connected

to the vessel. The setting of the relief valves should not be less than 1,1 times working pressure. The capacity of each valve should be such that the vapours generated under fire condition can be discharged with a pressure rise not more than 20% above the setting pressure. The discharge from the safety valves should be led to the open. 5. The vessel(s) and outgoing pipes permantly filled with carbon dioxide should have thermal insulation preventing the operation of the safety valve in 24 hours after de-energizing the plant, at ambient temperature of 45oC and an initial pressure equal to the starting pressure of the refrigeration unit. 6. The vessel(s) should be serviced by two automated completely independant refrigerating units solely intended for this purpose, each comprising a compressor and the relevant prime mover, evaporator and condenser. 7. The refrigerating capacity and the automatic control of each unit should be so as to maintain the required temperature under conditions of continuous operation during 24 hours at sea temperatures up to 32oC and ambient air temperatures up to 45oC. 8. Each electric refrigerating unit should be supplied from the main switchboard busbars by a separate feeder. 9. Cooling water supply to the refrigerating plant (where required) should be provided from at least two circulating pumps one of which being used as a stand-by. The stand-by pump may be a pump used for other services so long as its use for cooling would not interfere with any other essential service of the ship. Cooling water should be taken from not less than two sea connections, preferably one port and one starboard. 10. Safety relief devices should be provided in each section of pipe that may be isolated by block valves and in which there could be a build-up of pressure in excess of the design pressure of any of the components. 11. The piping system should be designed in such a way that the CO2 pressure at the nozzles should not be less than 1N/mm2. 12. Audible and visual alarms should be given in a central control station when: - the pressure in the vessel(s) reaches the low and high values according to 2; - any one of the refrigerating units fails to operate; - the lowest permissible level of the liquid in the vessels is reached. 13. If the system serves more than one space, means for


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Comments

control of discharge quantities of CO2 should be provided, e.g automatic timer or accurate level indicators located at the control position(s). 14. If a device is provided which automatically regulates the discharge of the rated quantity of carbon dioxide into the protected spaces, it should be also possible to regulate the discharge manually.

7 Fixed pressure water-spraying and water-mist fire-extinguishing systems 7 2.1.1.2 Areas for increased application rates

An indication of areas for which increased application rates may be required is given below:


Protected Area Boiler fronts or roof, firing areas, oil fuel units, centrifugal separators (not oily water separators),oil purifiers, and clarifiers. Hot oil fuel pipes near exhausts or similar heated surfaces on main or auxiliary diesel engines

Applikation Rate 20 l/min/m2 10 l/min/m2


8 Automatic sprinkler, fire detection and fire alarm systems 8 2.1.1 Dry pipe systems in saunas

For the definition of "dry pipe system" see resolution A.800(19), Annex, paragraph 2.3.

MSC/Circ. 847 int. (1) to reg. 12.1.1, 1st sentence


8 2.5.2.3 Definition of nominal area Nominal area is defined as being the gross, horizontal projection of the area to be covered.



9 Fixed fire detection and fire alarm systems 9 2.4.1.1 Acceptable activating arrangements

The following arrangement may be acceptable: .1 to activate a paging system; .2 to activate the fan stops; .3 to activate the closure of fire doors; .4 to activate the closure of fire dampers; .5 to activate the sprinkler system; .6 to activate the smoke extraction system; and .7 to activate the low-location lighting system.



9 2.1.4 Relevant definitions Loop means electrical circuit linking detectors of various sections in a sequence and connected (input and output) to the indicating unit(s). Zone address identification capability means a system with individually identifiable fire detectors.



FP 48/3 ANNEX 2

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Comments

9 2.1.3 Testing of detectors within cold spaces Detectors installed within cold spaces such as refrigerated compartments should be tested according to IEC Publication 60068-2-1 - Section one - Test Aa.



10 Sample extraction smoke detection systems 10 2.1.2 Calculation of intervals

The interval (I) should depend on the number of scanning points (N) and the response time of the fans (T) (See interpretation of paragraph 2.2.2 chapter 10 below.) With a 20 % allowance: I = 1.2 x T x N However, the maximum allowable interval should not exceed 120 s (Imax = 120 s).

MSC/Circ. 847 int. to reg. 13-1.1.2


10 2.2.2 Response time for fans Depending on the capacity of the fans and the length of system piping the maximum response time of the fans in combination with the system piping should be around 15 s.

MSC/Circ. 847 int. to reg. 13-1.3.3


12 Fixed emergency fire pumps 12 2.2.2.1 Heating of diesel driven power sources and other

means of starting 1 If the room for the diesel driven power source is not heated, the diesel driven power source for the pump should be fitted with electric heating of cooling water or lubricating oil. 2 The other means of starting include those by compressed air, electricity or other sources of stored energy, hydraulic power or starting cartridges.

MSC/Circ. 847 int. to reg. 4.3.3.2.3


13 Arrangement of means of escape 13 2.2.4 Size of landings and intermediate landings

If landings can be entered directly via entrance doors, situated in stairway enclosures, the area of such landings should comply with the requirements of paragraph 2.2.4 chapter 13 FSS Code. However, if landings can not be entered by entrance doors, such landings should be considered as intermediate landings which should comply with the capacity requirements as given in paragraph 2.3.1 chapter 13 FSS Code.




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14 Fixed deck foam systems

14 2.1.3 Capacity, use and handling of deck foam systems A common line for fire main and deck foam line can only be accepted provided it can be demonstrated that the hose nozzles can be effectively controlled by one person when supplied from the common line at a pressure needed for operation of the monitors. Additional foam concentrate should be provided for operation of 2 nozzles for the same period of time required for the foam system. The simultaneous use of the minimum required jets of water should be possible on deck over the full length of the ship, in the accommodation, service spaces, control stations and machinery spaces.

MSC/Circ. 847 int. to reg. 61.10.


14

2.3.2.3

Foam systems positions of aft monitors Port and starboard monitors required by this regulation may be located in the cargo area as defined in Reg. II-2/3.6, provided they are aft of cargo tanks and that they protect below and aft of each other.

SC169 MSC 76/18/2 FP47/WP.8, para.19

The original text of IACS UI SC170 has been agreed.

14 2.3.3 Application to tankers This paragraph applies to all tankers regardless of their size.



15 Inert gas systems 15 2.3.2.7 Arrangements for isolation of inert gas supply mains

and cargo piping systems As a guide, the effective isolation required by this paragraph may be achieved by the two arrangements shown in figures 1 and 2 of chapter 15 paragraph 2.3.2.7 in the Appendix.

MSC/Circ. 847 int. to reg. 62.13.4.1.


***

FP 48/3

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ANNEX 3

INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCES IN THE FIRE TEST PROCEDURE CODE AND FIRE TEST

PROCEDURES REFERRED TO IN THE CODE

Relevant document

Paragraph Interpretation or reference Existing MSC-Circulars

Comments

Fire Test Procedure Code

FTPC, Approval

5.1.6.5 For cases where an unsuccessful test had been conducted prior to the final approval test, the fire test report should include a description of the modifications made to the test specimen that resulted in the successful test.

MSC/Circ.1004 The original text has been agreed How-ever; the CG was of the opinion that this interpreta-tion may only be applied in the case where all tests are perfomed by the same labo-ratory.

FTPC, Approval

5.2.4 Type approval certificates for windows should state which side of the window was exposed to the heating condition during the test. The certificate should include a reference to optional test(s) such as hose stream test and/or thermo radiation test.

MSC/Circ.1036 The original text has been agreed

Non-combustibility test FTPC Annex 1 Part 1

2.1 The test exposure need not exceed a 30 minute duration.


Smoke and toxicity test FTPC Annex 1 Part 2

2.6.2 Not only the FTIR (Fourier Transform Infrared Spectrometer) method but also other methods such as GC/MS (Gas Chromatography/Mass Spectrometer) which can produce traceable results can be used for the gas analysis.


Test for "A","B", and"F" class divisions including windows, fire dampers, pipe penetrations and cable transits FTPC Annex 1 Part 3 Resolution A. 754(I8) Annex

2.1 2.6.2.2

"B" class doors should be fire tested in B class steel bulkheads of dimensions as stated in para-graph 2.4.1 of resolution A.754(I8), otherwise approval should be limited to the type of con-struction in which the door was tested.


FTPC Annex 1 Part 3

2.2.1 The minimum bulkhead panel height should be a standard height of the manufactured panel with a dimension of 2.400 mm.


FTPC Annex 1 Part 3

3.1 The calcium silicate board described as a dummy specimen specified in paragraph 3.3 of resolution A.653(16) should be used as a stan-dard substrate for adhesives.


Resolution A. 754(I8) Annex

1.2 The thickness of insulation on the stiffeners need not be same as that of the steel plate.



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Relevant document


Comments


1.6 Doors, windows and other division penetrations intended to be installed in fire divisions made of material other than steel should correspond to prototype(s) tested on a division made of such material, unless the Administration is satisfied that the construction, as approved, does not impair the fire resistance of the division regard-less of the division construction.



1.7 "B" class constructions should be tested without finishes. For constructions where this is not possible, finishes should be included in the non-combustibility test of the construction.


Resolution A. 754(I8) Appendix A.I Windows

2.1 The test should be conducted on a window of the maximum size (in terms of both the height and the width) and the type of the glass pane and/or the minimum thickness of the glass pane or panes and gaps, if appropriate, for which approval is sought. Test results obtained on this configuration should, by analogy, allow ap-proval of windows of the same type, with lesser dimensions in terms of height and width and with the same or greater thickness.

MSC/Circ.1036 Considering the behavior of the glass panes and the effect that weight may have to the efficency of the securing frame, it has been decided to delete �or greater� which was present in the last line in respect of glass panes� thickness. The remaing text is the same as in the original interpretation.

Resolution A. 754(I8) Appendix A.II Fire dampers

2.2.4 The distance between the fire damper and the structural core specified in paragraph 2.2.4 means the distance between the fire damper centre and the structural core.


Resolution A. 754(I8) Appendix A.II Fire dampers

4 If evaluation of insulation is required, it should prevent a temperature rise at any point on the surface not exceeding 180°C above the initial temperature. The average temperature rise is not relevant.


Resolution A. 754(I8) Appendix A.III Pipe and duct penetrations

4.1 Penetrations and transits should meet both integ-rity and insulation criteria.


Resolution A. 754(I8) Appendix A.IV Cable transits

4.1 Penetrations and transits should meet both integ-rity and insulation criteria.


FP 48/3 ANNEX 3

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Relevant document


Comments

Test for surface flammability FTPC Annex 1 Part 5

1 Application Where a product is approved based on a test of a specimen applied on a non-combustible sub-strate, that product should be approved for ap-plication to any non-combustible substrate with similar or higher density (similar density may be defined as a density ≥ 0.75 x the density used during testing) or with a greater thickness if the density is more than 400 kg/m3. Where a prod-uct is approved on the basis of a test result ob-tained after application on a metallic substrate (e.g. thin film of paints or plastic films on steel plates), such a product should be approved for application to any metallic base of similar or higher thickness (similar thickness is obtained as a thickness ≥ 0.75 x the thickness of metallic substrate used during testing).



7 Where a product is approved based on a test of a specimen applied on a non-combustible sub-strate, that product should be approved for ap-plication to any non-combustible substrate with similar or higher density (similar density may be defined as a density ≥ 0.75 x the density used during testing) or with a greater thickness if the density is more than 400 kg/m3. Where a prod-uct is approved on the basis of a test result ob-tained after application on a metallic substrate (e.g. thin film of paints or plastic films on steel plates), such a product should be approved for application to any metallic base of similar or higher thickness (similar thickness is obtained as a thickness ≥ 0.75 x the thickness of metallic substrate used during testing).



8.3.1 In the first line of the first sentence, the word �or� should read �of�'.



10 The sentence should be understood to mean: �Materials giving average values for all of the surface flammability criteria as listed in the following table ... (etc).


10 Qsb means an average of three values of average heat for sustained burning, as defined in para-graph 9.3.


Test for primary deck coverings FTPC Annex 1 Part 6

2.2 Fire test procedure The test may be terminated after 40 min.


***

FP 48/3

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ANNEX 4

INTERPRETATIONS TO BE FURTHER DISCUSSED

PART A: INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCES IN REVISED CHAPTER II-2 SOLAS�74


part Reg.

Interpretation or reference

Reference documents

Comments

Regulation 4 Probability of ignition B 4.2.2.4

and 4.2.3.1

Position of air pipes outlets Air pipes from oil fuel tanks or heated lubricating oil tanks shall be led to a safe position on the open deck. They shall not terminate in any place where a risk of ignition is present. Air pipes from unheated lubricating oil (including hydraulic oil) tanks may terminate in the ma-chinery space, provided that the open ends are so situated that issuing oil cannot come into contact with electrical equipment or heated surfaces.

FP 47/16, paragraph 12.7

This interpretation is offered to the atten-tion of the SC.

B 4.5.10.1.3 Monitoring the concentration of hydrocarbon gases in cargo pump rooms on oil tankers 1. Sequential sampling is acceptable as long as it is dedi-cated for the pump room only, including exhaust ducts, and the sampling time is reasonably short. 2. Suitable positions may be the exhaust ventilation duct and lower parts of the pump room above floor plates.

SC172 MSC 76/18/2 FP47/WP.8, para.19

Considering that only a slight majority of the Group� mem-bers accepted the proposal of disre-garding this interpre-tation, the final deci-sion on it the it is left to the SC

Regulation 5 Fire growth potential B 5.3 and

6.2 Materials used on passenger ships for bulkheads of accommodation spaces as defined in regulation II-2/3.1 With respect to materials and components used for bulk-heads in accommodation spaces as defined in regulation II-2/3.1 see table of regulations 5.3 and 6.2 in the appen-dix.

MSC/Circ.602 int. to reg.3.10 and 34; MSC/Circ.847 int. to reg.34

MSC/Circ. 602 was intended to be appli-cable to passenger ships only. The title has been amended accordingly. Existing wording in brackets has been considered unnecessary and deleted. The CG did not agree with the deci-sion took by the WG at FP47 in respect to the LFS characteris-tics of the panel surface FP47 (see para. 7 of FP47WP.8) It was the CG� opin-ion that the sketch does not give any idea of the real di-mension of the deco-rative panel (it may cover the entire bulkhead), determin-ing an equivalent volume for a panel surface only does not appear to be appro-


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part Reg.


Reference documents

Comments

priate; therefore, it was decided that LFS characteristics should be required for deco-rative panel surface. Doubts on the cor-rectness of the note ** have been also expressed.

B

5.3.2.2

Reference to ISO 1716:2002 Reference is made to the recommendations published by the International Organization for Standardization, in particular, Publication ISO 1716:2002 on Determination of the heat of combustion

Original text amended by FP47 (see para. 7 of FP47/WP.8)

Text contained in FP47/WP.8. How-ever, considering that ISO 1716:1973 is already referred to as footnote to reg. 5.3.2.2, the SC may consider this alterna-tive text �For the purposes of this regulation, ISO 1716:2002 may be used in lieu of ISO 1716:1973.� .

Regulation 9 Containment of fire C 9.2.2.2.2.1 Original Interpretation

Construction of extended bulkhead behind continuous ceilings or linings The extension of the bulkhead should be made of non-combustible material and the construction of the exten-sion should correspond to the fire class of extended bulk-head. If the extended bulkhead is of B-0, then the exten-sion may be made of thin steel plates of 1 mm thickness and tightened (e.g. with mineral wool). Alternatively, B-0 class extensions may be constructed of a suitably sup-ported mineral wool (density at least 100 kg/m3, thickness at least 50 mm). Alternative 1 (equally applicable to reg. 9.2.2.2.2.1, 9.2.2.3 and 9.2.3.2.1) The extension of the bulkhead should be made of non-combustible material and the construction of the exten-sion should correspond to the fire class of extended bulk-head. If the extended bulkhead is of B-0, then the The extension may be made of thin steel plates of 1 mm thick-ness and tightened (e.g. with mineral wool). Alternatively, B-0 class extensions it may be constructed of a suitably supported mineral wool (density at least 100 kg/m3, thickness at least 50 mm).


The original interpre-tation applied to ships carrying not more than 36 pas-sengers only. It was not clear then if, for ships carrying more than 36 passengers and cargo ships, extensions of B class bulkheads should be tested according to the FTP Code or not. The CG discussed in the matter but no firm conclusion has been reached. Beside the original text, two possible alternatives are given for further consideration by the SC.

FP 48/3 ANNEX 4

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Reference documents

Comments

Alternative 2 (equally applicable to reg. 9.2.2.2.2.1, 9.2.2.3 and 9.2.3.2.1) The extension of the bulkhead should be made of non-combustible material and the construction of the exten-sion should correspond to the fire class of extended bulk-head. If the extended bulkhead is of B-0, then the exten-sion may be made of thin steel plates of 1 mm thickness and tightened (e.g. with mineral wool). Alternatively, B-0 class extensions may be constructed of a suitably sup-ported mineral wool (density at least 100 kg/m3, thickness at least 50 mm). B-15 class extensions shall be tested according to the FTP Code a constituent part of the associated B-15 class bulk-head.

Regulation 10 Fire fighting C 10.2.1.1 Original interpretation

Prevention of freezing in pipes Special attention should be given to the design of the continuously pressurized pipelines for prevention of freezing in pipes in ships entering areas where low tem-peratures may exist. Alternative text Prevention of freezing in pipes This requirement for the arrangement to prevent pipes and hydrants from freezing is a special attention to exposed pipes where low temperatures may occur. It is considred fulfilled when; (1) pipes and hydrants at open decks are provided with suitable insulation or appropriate heating devices; or (2) pipelines are designed so that residual water in it can be effectively drained with scupper valves

MSC/Circ.847 int. (2) to reg. 4.3.4.1 new placing of interpretation, more logical

The CG found that the text of the origi-nal interpretation gives no criteria for fulfilling the re-quirements set out in reg. 10.2.1.1 and, for this reason, it was deemed useless by the CG. Instead of simply deleting it, it was found more appropriate to de-velop a possible alternative to it, which is included here included for the SC consideration.

C 10.2.3.3.1 Diameter of nozzles Nozzles larger in diameter may be provided if the re-quirements relating to the provision of water for fire fight-ing purposes are met.


It was proposed to delete this interpreta-tion because its in-tent is not suffi-ciently clear but only a slight majority of the Group members supported this pro-posal so the final decision is left to the SC. It should be noted that a member submitted the follow-ing practice: - 12 mm for hydrant of K Q1/2 of less than 16


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part Reg.


Reference documents

Comments

- 16 mm for hydrant of K Q1/2 of less than 19 but not less than 16 - 19 mm for hydrant of K Q1/2 of less than 22 but not less than 19 - 22 mm for hydrant of K Q1/2 of 22 or above where, K = 2.58 for 0.40 MPa in required pressure for hydrant K = 2.77 for 0.30 MPa in required pressure for hydrant K = 2.85 for 0.27 MPa in required pressure for hydrant K = 2.90 for 0.25 MPa in required pressure for hydrant Q: Capacity of the smallest fire pump (m3/h)

C 10.5.6.3.1 Definition of areas to be protected by local application systems (internal combustion machinery) Hot surfaces such as exhaust pipes without insulation or with insulation likely to be removed frequently for main-tenance and high-pressure fuel oil systems installed nearby the hot surfaces should be protected. The term �insulation likely to be removed frequently� means insulation fitted in accordance with the requirements of reg.II-2/4.2.2.6.1, but which might not be secured firmly because it may be removed frequently for periodically maintenance, such as pipes between cylinders and exhaust manifold. For typical diesel engines, the area on top of the engine, fuel oil injection pumps and turbo chargers should be protected. Where the F.O. injection pumps are located in sheltered position such as under the steel platform, the pump need not be protected by the system.

Interpretation added in accordance with para. 9 of FP 47/WP.8.

According to para. 9 of FP47/WP.8, the Correspondence Group discussed the interpretation to reg. 10.5.6.3.1. Excahnge of opinions among the members lead to some modification to the original text but no firm conclusion or agreement has beeen reached. Therefore, this intrepretation shold be further considered by the SC.

C 10.5.6.3.2 Definition of areas to be protected by local application systems (boiler fronts) The area around the burners without insulation or with insulation likely to be removed frequently for mainte-nance should be protected. The term�insulation likely to be removed frequently� means insulation fitted in accordance with the requirements of reg.II-2/4.2.2.6.1, but which might not be secured firmly because it may be removed frequently for periodically maintenance, such as pipes between cylinders and exhaust manifold. Oil-fired inert gas generators should be also protected in the same manner.

Interpretation added in accordance with para. 9 of FP 47/WP.8

The same comments as per interpretation to reg. II-2/10.5.6.3.1 apply.

FP 48/3 ANNEX 4

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Reference documents

Comments

C 10.5.6.3.3 Definition of areas to be protected by local application systems (incinerators) The area around the burner(s) without insulation or with insulation likely to be removed frequently for mainte-nance should be protected. The term�insulation likely to be removed frequently� means insulation fitted in accordance with the requirements of reg.II-2/4.2.2.6.1, but which might not be secured firmly because it may be removed frequently for periodically maintenance, such as pipes between cylinders and exhaust manifold.


The same comments as per interpretation to reg. II-2/10.5.6.3.1 apply.

C 10.5.6.3.4 Definition of areas to be protected by local application systems (purifiers) Whole of the purifiers except separate heater and pipe-lines should be protected.


The CG felt that the wording �separate heaters� should be further discussed.

C 10.7.1.3 Equivalent Protection

Water supplies defined in regulation 19.3.1.2 are consid-ered as an acceptable protection for cargoes listed in Ta-ble 2 of MSC/Circ. 671.

SC159 MSC 75/19/2 FP 47/WP.8, para.19

There was no clear decision on the ac-ceptability of this interpretation.

Regulation 13 Means of escape D 13.3.2.3 Direct access to stairway enclosures

Direct access to escape stairway enclosures is only in-tended for those areas of an accommodation space as defined in regulation II-2/3.39 for public spaces. Portions of an accommodation space that serve a purpose different than that of a public space such as theatre backstage areas, should not have direct access to escape stairway enclo-sures.

MSC/Circ. 1037 int. to new reg. 13.3.2.3

Some members felt that this interpreta-tion deserves further discussion, espe-cially for its last part where the sentence �portion of an ac-commodation space that serve a purpose different than that of a public space� is too general and does not give any clear picture (except for the back-stage) of the type of arrangement it refers to.

D 13.6 Arrangement of escape routes in ro-ro cargo spaces The escape (and access) routes should be so arranged to ensure safe escape also during loading and unloading such as indication of escape lane on deck with minimum clearance of 600 mm in width.


The original text has been amended but no clear consensus has been reached.

Regulation 20 Protection of vehicle, special category and ro-ro spaces G 20.6.2.1 Portable fire extinguishers on weather decks used as

ro-ro cargo space The requirements set out in this regulation need not to be applied to weather decks used as ro-ro cargo spaces.

SC73 This interpretation has been derived from the note to IACS UI SC 73. A clear consensus has not been reached.


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PART B: INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCES IN THE FIRE SAFETY SYSTEMS CODE


Interpretation or reference Existing MSC-Circulars

Comments

3 Personnel protection 3 2.1.1.1 Reference to ISO standard 6942: 1983

Reference is made to ISO standard 6942: 1983 - Clothing for protection against heat and fire; evaluation of thermal behaviour of materials and material assemblies when exposed to source of radiant heat.


It has been underlined by members that there is conflict between the content of this interpretation and what is compulsory required at present in the European Com-munity.

PART C: INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCES IN THE FIRE TEST PROCEDURE CODE AND FIRE TEST PROCEDURES REFERRED TO IN THE CODE Relevant document


Comments

Non-combustibility test FTPC Annex 1 Part 1

2.1 For the purposes of this Part, ISO 1182:2002 may be used in lieu of ISO 1182:1990

***

FP 48/3

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ANNEX 5

INTERPRETATIONS WHOSE APPLICATION TO EITHER THE REVISED SOLAS CHAPTER II-2 OR THE FSS CODE HAVE BEEN CONSIDERED

NOT SUITABLE OR OBSOLETE PART A: INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCESIN REVISED CHAPTER II-2 SOLAS�74


part Reg.


Comments

Regulation 1 Application A 1.4.1 Reference to MSC/Circ.606

Reference is made to MSC/Circ.606 - Port state concur-rence with SOLAS exemptions.

--- Interpretation con-sidered obsolete by FP 47 (see FP 47/WP.8, para-graph 6.)

A 1.6 Reference to ISGOTT Reference is made to the International Safety Guide for Oil Tankers and Terminals, as amended.


This statement was found to be so vague that it was not understood for which regulation, or part of it, it should be considered an interpretation.

A 1.6.2.1.2 Reference to MSC/Circ.799 Reference is made to the MSC/Circ.799 - Guidelines for performance and testing criteria and surveys of expansion foam concentrates for fixed fire-extinguishing systems for chemical tankers.


A 1.6.2.1.3 Reference to MSC/Circ.553 Reference is made to MSC/Circ. 553 - Information on flashpoint and fire-fighting media for chemicals to which neither the IBC nor BCH Codes apply.

MSC/Circ.847 int. 1.2 to 55.2 last sentence

Interpretation con-sidered obsolete by FP 47 (see FP 47/WP.8, para-graph 6.)

A 1.6.5 Reference to MSC/Circ.353 and MSC/Circ.387 Reference is made to MSC/Circ. 353 - Guidelines for inert gas systems as amended by MSC/Circ.387 - Revised guide-lines for inert gas systems.



Regulation 4 Probability of ignition B 4.2.1.1 Reference to resolution A.565(14)

Reference is made to resolution A.565(14) - Recom-mended procedures to prevent the illegal or accidental use of low flashpoint cargo oil as fuel.


B 4.2.2.5.1 Reference to ISO 15540:1999 and ISO 15541:1999 Reference is made to recommendations published by the International Organization for Standardization, in particu-lar, Publications ISO 15540:1999 on Test methods for fire resistance of hose assemblies and ISO 15541:1999 on Requirements for the test bench of fire resistance of hose assemblies.



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part Reg.


Comments

B 4.5.3.3 Reference to MSC/Circ.677 and MSC/Circ.731 Reference is made to MSC/Circ.677 - Revised standards for the design, testing and locating of devices to prevent the passage of flame into cargo tanks in oil tankers, and MSC/Circ.731 - Revised factors to be taken into consid-eration when designing cargo tank venting and gas-freeing arrangements.

MSC/Circ.847 int. to reg. 59.1.5 MSC/Circ.450/Rev.1 replaced by MSC/ Circ.731; see also footnote to new reg. 4.5.3.3

In discussing this interpretation, it appeared that the footnote to reg.. 4.5.3.3 as it stands now is not correct. FP46 decided to delete the reference to MSC/Circ. 677 and keep the reference to MSC/Circ. 731 (see para. 6 of FP46/WP.8, para. 5.24 of FP46/16 and para. 10.7 of MSC75/24). The CG found that the correct footnote should read "Refer to MSC/Circ.677 as amended by MSC/Circ.1009, Revised � tankers, and to MSC/Circ.731, Revised � gas-freeing arrangements.� The matter is specifically mentioned in the CG report.

B 4.5.3.4.1.3 Electrical equipment in areas next to cargo tank venti-lation outlets which permit flow of large volumes of vapour and reference to 60092-502 1 Permitted electrical equipment: .1 Areas on open deck within 6 m of cargo tank venti-

lation outlets which permit the flow of large vol-umes of vapour during loading/ discharging/ bal-last:

- certified safe type equipment. .2 Areas 4 m beyond the zone specified in .1 above: - certified safe type equipment; or - equipment of a type which ensures, absence of

sparks or arcs and absence of ignition capable sur-face during normal operation; or

- equipment specifically designed for zone 2. 2 Electrical equipment fitted in compliance with IEC Publication 60092-502 is not considered a source of igni-tion or ignition hazard.


The CG agreed to adopt the test of IACS UI SC 70: Therefore, this interpretation has been considered unnecessary.

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B 4.5.5 Reference to MSC/Circ.387, MSC/Circ.485 and

MSC/Circ.731 Reference is made to MSC/Circ.387 - Revised Guidelines for Inert Gas Systems MSC/Circ.485 - Clarification of inert gas system requirements under SOLAS 1974, as amended, and MSC/Circ.731 - Revised factors to be taken into consideration when designing cargo tank venting and gas-freeing arrangements

MSC/Circ.847 int. to reg. 62 MSC/Circ.450/Rev.1 replaced by MSC/Circ.731

Requirements for IGS are now con-tained in Chapter 15 of the FSS Code. All MSC/Circs referred to in this interpretation are contained in the footnotes of reg. 2.1.2 of such a paragraph.

B 4.5.5.1.2 Meaning of �tankers� �All tankers� means any tanker, of any deadweight, fitted with a crude oil washing system, irrespective of its age.



B 4.5.5.2.1 Reference to resolution A.567(14) and Corr.1 Reference is made to resolution A.567(14) - Regulation for inert gas systems on chemical tankers.



Regulation 5 Fire growth potential B 5.3.1.2.1 Separating �partial bulkheads� of spaces

With respect to "partial bulkheads� see regulation II-2/9.2.2.3.2.2, 9.2.2.4.2.2, 9.2.3.3.2.2 or 9.2.4.2.2.2.


Considering the text of regulations II-2/9.2.2.3.2.2, 9.2.2.4.2.2, 9.2.3.3.2.2 or 9.2.4.2.2.2, this interpretation has been considered unnecessary.

B 5.3.2.4.2 Materials used on surfaces of bulkheads, ceilings and linings Bulkheads, ceilings and linings should comply with regula-tion II-2/5.3.2.4.2 regardless of the type of materials used; this regulation applies regardless of the type of material. (see also interpretation (1) to regulation 6.2)

MSC/Circ.847 int. (1) to reg. 49 Only for cargo ships!? See also remark to reg. 6.2

Interpretation cov-ered by the interpre-tation to reg. 5.3 and 6.2 developed on the basis of IACS UI SC126.

Regulation 6 Smoke generation potential and toxicity B 6.2 Application to materials used for bulkheads and on

surfaces of bulkheads, ceilings, linings and furniture 1 Bulkheads, ceilings and linings should comply with regulations II-2/6.2 regardless of the type of materials used; this regulation applies regardless of the type of material. Other finishes used in exposed interior surfaces other than decking should comply with this regulation. (see also interpretation to regulation 5.3.2.4.2)

MSC/Circ.847 int. (1) to reg. 49


3 With respect to materials and components used for bulkheads in accommodation spaces as defined in regula-tion II-2/3.1 see table of regulations 5.3 and 6.2 in the appendix. (see also interpretation to regulation 5.3)

MSC/Circ.602 int. to reg.3.10 and 34



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Regulation 7 Detection and alarm

C 7.5.5.3 Method IIIC Construction In the case of ships built in accordance with Method IIIC, the detection system is only relevant to the accommoda-tion block. Service spaces built away from the accommo-dation block need not be fitted with a fixed fire detection system.

SC160 MSC 75/19/2 FP 47/WP.8, para.19

It was the opinion of the majority of the Group that, according to Method III C, also that service spaces built away from the accommodation block must also have a fixed detec-tion system.

C 7.9 Reference to resolution A.830(19) Reference is made to resolution A.830(19) - Code of Alarms and Indicators.


Regulation 8 Control of smoke spread C 8.4 Construction and location of draught stops

2 In general, the draught stops should coincide with the bulkheads where continuous ceilings are used.

MSC/Circ.847 int. (1), (2) and (3) to reg. 35.1.1, int. to reg. 50.3.4

It has been agreed that there is no need in requiring draught stops to coincide with bulkheads in case a continuous ceiling is used.

Regulation 9 Containment of fire C 9.2.2.1.5.1 Reference to other requirements

Special requirements for the spaces concerned are given in regulations II-2/20.


The text was con-sidered to be only a reference and not an interpretation.

C 9.2.2.3.2.2 Insulation values of spaces with special characters of two or more space categories and separating by wire mesh

1 Examples for spaces having the special characters of two or more space:

.1 The fire insulation values of the divisions of emer-gency generator rooms in passenger ships carrying more than 36 passengers should be the highest value for the space when the space is considered be-ing a control station (category (1)) and a machinery space (category (11) or (12)).

.2 The fire insulation of the division of a public space which is also used as an internal muster station in passenger ships carrying more than 36 passengers should be taken as the highest value for the space when considered as an accommodation space (cate-gories (6), (7) or (8)) and a muster station (category (4)).

2 A separation made by wire mesh between two por-tions of a space is not considered a division in applying this regulation.

MSC/Circ.847 int. (1) (exam-ples only) and (2) to reg. 26.2.2

These interpreta-tions have been deemed already covered by the text of 9.2.2.3.2.

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C 9.2.2.3.2.2

(9) Devices in isolated pantries containing no cooking appliances For isolated pantries containing no cooking appliances, see interpretation to regulation II-2/3.1.


Considering the text of reg. 3.1, this inter-pretation was deemed unnecessary.

C 9.2.2.3.2.2 (10)

Open cofferdams If a cofferdam is open to some other space, it is consid-ered to be part of that other space.


The content if this sentence was found obvious and not really necessary

C 9.2.2.3.3 Continuous �B� class ceilings and linings as part of insulation Continuous �B� class ceilings and linings may be ac-cepted as contributing to the required insulation of a divi-sion (combination of steel deck or bulkhead and ceiling or lining) providing that they are fire tested in accordance with the applicable test procedure (e.g. resolution A.754 (18)).


A class divisions are to be subject to the standard fir test according to the FTP Code. The use of membrane pro-tection is already foreseen in the Res. A.754(18).

C 9.2.2.4.2.2 Insulation values of spaces with special characters of two or more space categories and separating by wire mesh 1 See interpretation 1 (examples) of regulation II-2/9.2.2.3.2.2. 2 A separation made by wire mesh between two por-tions of a space is not considered a division in applying this regulation.


These interpreta-tions have been considered already covered by the text of reg. 9.2.2.4.2.2

C 9.2.2.4.3 Continuous B class ceilings and linings as part of insu-lation See interpretation of regulation II-2/9.2.2.3.3


A class divisions are to be subject to the standard fire test according to the FTP Code. The use of membrane pro-tection is already foreseen in Resolu-tion A.754(18).



These interpreta-tions have been deemed already covered by the text of reg. 9.2.3.3.2.2

C 9.2.3.3.2.2 (8)

Category of weather decks used for cargo stowage With respect to the fire integrity, weather decks used for cargo stowage should be considered as category (8) spaces except for cargoes which constitute a low fire risk.


A slight majority agreed to delete this interpretations. Its content has been judged to be far beyond the basic requirements of reg. 9.2.3.3.2.2 because:

- the regulation identifies cat. (8) as cargo spaces. Open decks are not spaces;


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- the interpretation does not contain any vertical limit; there-fore, applying it uniformly, it would be requested: 1) A-0 class win-dows, in general; and 2) A-60 class insu-lation and A-60 class windows for the navigating bridge. This arrangements is not even re-quested on tankers. - It has been also pointed out that in reg. 9.2.3.3.2.2(8) there is not any vague expression to be interpreted. Therefore, this statement should be considered an amendment.

C 9.2.3.3.3 Continuous �B� class ceilings and linings as part of insulation Continuous �B� class ceilings and linings may be ac-cepted as contributing to the required insulation of a divi-sion (combination of steel deck or bulkhead and ceiling or lining) providing that they are fire tested in accordance with the applicable test procedure (e.g. resolution A.754 (18)).


The use of mem-brane protection is already foreseen in the Trs. A.754(18).



These interpreta-tions have been deemed already covered by the text of 9.2.4.3.2.2

C 9.2.4.2.3 Continuous �B� class ceilings and linings as part of insulation Continuous �B� class ceilings and linings may be accepted as contributing to the required insulation of a division (combination of steel deck or bulkhead and ceiling or lining), providing that they are fire tested in accordance with the applicable fire test procedure (e.g. resolution A.754 (18)).


The use of mem-brane protection is already foreseen in the Resolution A.754(18).

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C 9.3.1

Reference to resolution A.753(18) and miscellaneous items 2 The arrangements which should be adopted when an �A� class division is penetrated by a ventilation duct are those contained in regulation II-2/9.7. (Refer to the Recommendation on Fire Resistance Tests for �A�, �B� and �F� Class Divisions, adopted by the Organization by resolution A.754 (18).)


Interpretation con-sidered obsolete by FP47 (see FP47/WP.8, para-graph 6.)

C 9.3.2 Reference to resolution A.753(18) Reference is made to resolution A.753(18) � Guidelines for the application of plastic pipes on ships. (see also interpretation to reg. 9.3.1)

MSC/Circ.847 int. (1).1.3 to reg. 18.2.1

This statement was considered unneces-sary.

C 9.7.1.1 Definition of �free sectional area� The term �free sectional area� means, even in the case of a pre-insulated duct, the area calculated on the basis of the inner diameter of the duct. (see also interpretations to reg. 9.7.3.1 and 9.7.3.2)

--- Interpretation con-sidered obsolete by FP47 (see FP47/WP.8, para-graph 6.)

C 9.7.3.2 Definition of �free sectional area� The term �free sectional area� means, even in the case of a pre-insulated duct, the area calculated on the basis of the inner diameter of the duct. (see also interpretation to reg. 9.7.1.1 and 9.7.3.1)


Merged to the inter-pretation to reg. 9.7

Regulation 10 Fire fighting C 10.2.1.7 Reference to resolution A.470(XII)

Reference is made to resolution A.470 (XII) � Interna-tional shore connection (shore side).


This text was con-sidered not an inter-pretation giving any idea on how the regulation should be applied.

C 10.5.5 Construction of water fog applicators A water fog applicator might consist of a metal L-shaped pipe, the long limb being about 2 m in length capable of being fitted to a fire hose and the short limb being about 250 mm in length, fitted with a fixed water fog nozzle or capable of being fitted with a water spray nozzle.



C 10.5.6.2 Reference to MSC/Circ.913 Reference is made to MSC/Circ.913 - Guidelines for the approval of fixed water-based local application fire-fighting systems for use in category A machinery spaces.


C 10.6.1 Reference to resolution A.800 (19) Reference is made to resolution A. 800 (19) - Revised guidelines for approval of sprinkler systems equivalent to that referred to in SOLAS regulation II-2/12.

MSC/Circ.847 int. to reg. 36.1.2 or (1) to reg. 36.2

This reference is already given in Chapter 8 of the FSS Code.

C 10.6.2 Reference to resolution A.800 (19) Reference is made to resolution A. 800 (19) - Revised guidelines for approval of sprinkler systems equivalent to that referred to in SOLAS regulation II-2/12.

MSC/Circ.847 int. to reg. 36.1.2 or (1) to reg. 36.2

This reference is already given in Chapter 8 of the FSS Code.


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C 10.6.4.1 Reference to ISO 15371:2000

Reference is made to the recommendations by the International Organization for Standardization, in particular, Publication ISO 15371:2000 on Fire-extinguishing systems for protection of galley deep-fat cooking equipment.


C 10.7.1.4 Reference to the Code of Safe Practice for Solid Bulk Cargoes and MSC/Circ.671 Reference is made to the Code of Safe Practice for Solid Bulk Cargoes � Emergency Schedule B14, entry for coal and to MSC/Circ.671.- List of solid bulk cargoes which are non-combustible or constitute a low fire risk or for which a fixed gas fire-extinguishing system is ineffective.


C 10.7.2 Exemptions when carrying cargoes listed in MSC/Circ.671 For cargoes listed in the annex to MSC/Circ.671 which constitute a low fire risk, exemptions from regulation II-2/10.7.1.3 may be granted.


Considered covered by the interpretation to reg. 10.7.1.3 under development on the basis of IACS UI SC159.

Regulation 11 Structural integrity C 11.4.1 Insulation of crowns and casings of machinery spaces

of category A Crowns and casings exposed to air need not be insulated, except those facing category (4) deck areas of regulation II-2/9.2.2.3.

MSC/Circ.847 int. to reg. 23.3, and 42.4 (2nd sentence only)

Reg. 11.4.1 indi-cates that crown and casing are to be �insulated as by table 9.5 and 9.7 as appropriate�. Table 9.5 applies to cargo ships while table 9.7 applies to tank-ers. �appropriate� may mean �when adjacent to enclosed spaces� but it does not mean �when adjacent to open decks�. Taking into consid-eration all what in the above, this in-terpretation was considered unneces-sary.

C 11.4.2 Material of floor platings in machinery spaces of cate-gory A The floor plating of normal passageways in machinery spaces of category A should be made of steel.

MSC/Circ.847 int. (1) to reg. 34.1, int. (2) to reg. 49


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C 11.6.2.2 Electrical equipment in areas next to cargo tank venti-

lation outlets which permit flow of small volumes of vapour Permitted electrical equipment: .1 Areas on open deck within 3 m of cargo tank venti-

lation outlets which permit the flow of small vol-umes of vapour caused by thermal variation:

- certified safe type equipment. .2 Areas 2 m beyond the zone specified in .1 above:

- certified safe type equipment; or - equipment of a type which ensures absence of sparks or arcs and absence of ignition capable surface during normal operation; or - equipment specifically designed for zone 2 as de-fined in IEC Publication Electrical installations in ships - Part 502: Tankers - Special features .


Replaced by the interpretation to reg. 11.6.2.2 that has been developed on the basis of IACS UI SC 70.

Regulation 13 Means of escape D 13.3.3.2

13.3.3.3 Arrangements of escape routes in accommodation areas Escape routes in the accommodation area may consist of: .1 two stairways protected according to regulation II-

2/9.2.3.4.1 and its interpretation in combination with doors in the outer boundaries on starboard and port-side of the deckhouse at least two levels from where the lifeboat or liferaft embarkation area can be easily reached. (see figure 1 of regulation II-2/13.3.3.2/3.3.3 in the appendix) or;

.2 one stairway protected according to regulation II-2/9.2.3.4.1 and its interpretation in combination with at least one door in the outer boundary of the deckhouse at each level and a stair or escape hatch directly to the open deck from those parts of the accommodation which are situated below the lowest open deck.(see figure 2 of regulation II-2/13.3.3.2/3.3.3 in the appendix).

MSC/Circ.847 int. to regs. 45.1.2.1/45.1.2.2 interpretations seem to be super-fluous, may be deleted

This interpretation has been considered superfluous.

D 13.3.3.4 Design of dead-end corridors Dead-end corridors, where they can not be avoided, should be so designed that persons do not easily enter such corri-dors in case of emergency.


This interpretation was found unclear. By rules, on cargo ships, dead-end of less than 7 m are allowed, even within accommoda-tion spaces.

D 13.3.4 Reference to MSC/Circ.849 Reference is made to MSC/Circ.849 - Guidelines for the performance, location, use and care of emergency escape breathing devices (EEBDs).

--- Interpretation con-sidered obsolete by FP 47 (see FP 47/WP.8, para-graph 6).


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D 13.4.3.1 Reference to MSC/Circ.849

Reference is made to MSC/Circ.849 - Guidelines for the performance, location, use and care of emergency escape breathing devices (EEBDs).


D 13.7.1.1 Reference to MSC/Circ.777 and resolution A.760(18) 1 Reference is made to MSC/Circ.777 - Indication of the �assembly stations� in passenger ships. 2 Reference is made to resolution A.760(18) - Symbols related to life-saving appliances and arrangements.


Regulation 14 Operational readiness and maintenance E 14.2.2.1 Reference to MSC/Circ.850

Reference is made to MSC/Circ.850 - Guidelines for the maintenance and inspection of fire protection systems and appliances.


Regulation 15 Instructions, onboard training and drills E 15.2.4 Reference to resolution A.654(16) and MSC/Circ.1055

1 Reference is made to resolution A.654 (16) - Graphical symbols for fire control plans



E 15.2.4.2 Reference to MSC/Circ.451 Reference is made to MSC/Circ.451 - Guidance concern-ing the location of fire control plans for assistance of shoreside fire fighting personnel.



E 15.3.2 Reference to resolution A.756(18) Reference is made to resolution A.756(18) - Guidelines on the information to be provided with fire control plans and booklets required by SOLAS regulations II-2/20 and 41-2.



Regulation 17 Alternative design and arrangements F 17.3 Reference to MSC/Circ.1002

Reference is made to MSC/Circ.1002 - Guidelines on alternative design and arrangements for fire safety.


F 17.4.1 Reference to MSC/Circ.1002 Reference is made to MSC/Circ.1002 - Guidelines on alternative design and arrangements for fire safety.


Regulation 18 Helicopter facilities G 18.5.1.4 Reference to the International Civil Aviation Organi-

zation Airport Services Manual Reference is made to the International Civil Aviation Organization Airport Services Manual, part 1 - Rescue and Fire fighting, Chapter 8 - Extinguishing Agent Char-acteristics, Paragraph 8.1.5 - Foam Specifications Table 8-1, Level �B�.


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Regulation 19 Carriage of dangerous goods

G 19 Reference to MSC/Circ.608/Rev.1 Reference is made to MSC/Circ.608/Rev.1 - Interim guide-lines for open-top container ships.


G 19.2.1 Reference to the IMDG Code 1 Reference is made to part 7 of the International Mari-time Dangerous Goods Code. 2 Reference is made to chapter 3.4 of the International Maritime Dangerous Goods Code.

MSC/Circ.847 ints. (1) and (2) to reg. 54.1.1 replaced by footnotes to new reg. 19.2.1


G 19.3.1 Water supplies for open-top container spaces in ships (MSC/Circ.608/Rev.1).



G 19.3.1.3 Reference to resolution A.123(V) and sizing of scup-pers and drainage pumps 1 Reference is made to resolution A.123(V).- Recom-mendation on fixed fire-extinguishing systems for special category spaces.



2 Pumping and drainage arrangements should be such as to prevent the accumulation of water on any such decks. (Reference is made to regulation 22 of the 1988 LL Protocol.)


Considering the text of the regulation, this interpretation was found unneces-sary.

G 19.3.9 Reference to resolution A.123(V) Reference is made to resolution A.123(V) - Recommenda-tion on fixed fire-extinguishing systems for special cate-gory spaces.



G 19.4 Reference to MSC/Circ.642 and Certification of spe-cial dangerous goods 1 Reference is made to MSC/Circ. 642 - Document of compliance with the special requirements for ships carrying dangerous goods under the provisions of regulation II-2/54 of SOLAS 1974, as amended.



G table 19.2 Certification of special dangerous goods Certification for carriage of solid dangerous bulk cargoes covers only those cargoes listed in Appendix B of the BC Code except cargoes of MHB. Other solid dangerous bulk cargoes may only be permitted subject to acceptance by the Administrations involved. (See also interpretation 2 of regulation II-2/19.4)

MSC/Circ.847 int. to table 54.2

Considered a repeti-tion of the interp.to reg. 19.4.


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Regulation 20 Protection of vehicle, special category and ro-ro spaces

G 20.3.2.1 Degree of protection of electrical equipment The electrical equipment referred to in this regulation should be of certified safe type and wiring, if fitted, and should be suitable for use in zone 1 areas as defined in IEC Publication 60079 - Electrical Apparatus for Explo-sive Gas Atmospheres (Gas group II A and temperature class T 3).

MSC/Circ.847 int. (2) to reg. 37.2.2.1, int. to reg. 37.3.2.1, 38.4.1, 53.2.4.1


G 20.6.1 Reference to MSC/Circ.914 Reference is made to MSC/Circ.914 - Guidelines for the approval of alternative fixed water-based fire-fighting systems for special category spaces.


G 20.6.1.2 Reference to resolution A.123(V) Reference is made to resolution A.123(V) - Recommen-dation on fixed fire-extinguishing systems for special category spaces.



G 20.6.1.3 Reference to MSC/Circ.914 Reference is made to MSC/Circ.914 - Guidelines for the approval of alternative fixed water-based fire-fighting systems for special category spaces.


G 20.6.1.4.1.3

Sizing of pumping and drainage arrangements Pumping and drainage arrangements should be such as to prevent the accumulation of water on any such decks. (Reference is made to regulation 22 of the 1988 LL Pro-tocol.)


Considering the text of regulation 20.6.1.4.1.3, this interpretation was deemed unneces-sary.

G 20.6.1.4.2 Sizing of pumping and drainage arrangements and Reference to resolution A.123(V) 1 Pumping and drainage arrangements should be such as to prevent the accumulation of water on any such decks. (Reference is made to regulation 22 of the 1988 LL Protocol.)

MSC/Circ.847 int. to reg. 53.2.2.1.4, 53.2.2.2

Considering the text of regulation 20.6.1.4.2, this interpretation was deemed unneces-sary.

2 Reference is made to resolution A.123(V) - Recom-mendation on fixed fire-extinguishing systems for special category spaces.

MSC/Circ.847 int. to reg. 53.2.2.1.4, 53.2.2.2


G 20.6.2.1 Fire protection arrangements in cargo spaces includ-ing special category spaces Portable extinguishers suitable for fighting oil fires shall be provided at each car deck level in each hold of com-partment where vehicles are carried spaced not more than 20m apart, on both sides of the ship. One of these extin-guishers shall be positioned at each entrance to the car spaces. Notes: 1. This need not apply to weather decks used as ro-ro cargo spaces.

SC73 This interpretation, except the note, has not been considered necessary because already covered by the content of reg. 20.6.2.1. It has been agreed that the note may be in-cluded in a separate interpretation.

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G 20.6.2.1 Suitability and capacity of portable fire extinguishers

Fire extinguishers should be suitable for �A� and �B� class fires. The extinguishers should have a capacity of 12 kg dry powder or equivalent.

MSC/Circ.847 int. (2) to reg. 37.1.5.3, 38.2.3, 53.2.2.3

Considering the changes introduced in regulation 20.6.2.1 (e.g. the request of providing a fire extinguisher every 20 m) this interpretation was deemed unneces-sary.

G 20.6.2.2.1 Construction of water fog applicators See interpretation of regulation II-2/10.5.5.




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PART B: INTERPRETATIONS OF VAGUE EXPRESSIONS, OTHER VAGUE WORDING AND REFERENCES IN THE FIRE SAFETY SYSTEMS CODE



Comments

3 Personnel protection 3 2.1.1.2 Reference to IEC standard 60903

Reference is made to IEC- Publication 60903. MSC/Circ. 847 int. to reg. 17.1.1.2

This interpretation has been considered unnecessary because IEC-publication 60903 is not related to electrical non-conductive test

5 Fixed gas fire-extinguishing systems Fire extinguishers 5 2.1.1.3 Means for checking the quantity of medium in

containers 2 Surface indicators containing radioactive material should be of a type accepted by the Administration.


Interp. 2 has been deleted considering that the weighing of the medium is a responsibility of the Administration. It is obvious that the means for verifying this shall be to the Administration� satisfaction. �Type accepted� has no meaning.

5 2.1.3.2 Warning of release of extinguishing medium into ro-ro cargo spaces and other spaces where personnel can enter Reference is made to the Code on alarms and indicators (AI Code), 1995 (resolution A. 830(19)).


The CG felt that the application of Res. A.830(19) should be discussed in detail by the Sub-Committee. For the time being, it has been decided to disregard this refer-ence.

5 2.1.3.2 Advance period of time of alarm sounding The alarm shall sound for the period of time necessary to evacuate the space but not less than 20 s.

SC25 The text of the second interpreta-tion contained in the IACS UI SC25 has been found already covered by regulation 2.1.3.2. For this reason, it has not been con-sidered this inter-pretation necessary.

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Comments

6 Fixed foam fire-extinguishing systems 6 2.2 High-expansion foam fire-extinguishing system

in spaces other than machinery spaces When such a system is to be fitted in any space other than a machinery space, this regulation applies.


Reg. II-2/10.4.12 which reads �Where a fixed fire-extinguishing sys-tem not required by this chapter is in-stalled, it shall meet the requirements of the relevant regula-tions of this chapter and the Fire Safety Systems Code.� In the light of this, the interpretation has been judged unnecessary.

6 2.2.1.1 Reference to MSC/Circ.670 Reference is made to MSC/Circ.670 - Guidelines for the performance and testing criteria and surveys of high-expansion foam concentrates for fixed fire-extinguishing systems.


This reference is already present in the text of para-graph 6.2.1.1 and it may be disregarded.

6 2.3.1.1 Reference to MSC/Circ.582 Reference is made to MSC/Circ. 582 - Guidelines for the performance and testing criteria and surveys of low-expansion foam concentrates for fixed fire-extinguishing systems.


This reference is already present in the text of para-graph 6.2.3.1.1 and may be disregarded.

7 Fixed pressure water-spraying and water-mist fire-extinguishing systems 7 2.2 Reference to MSC/Circ.668 and MSC/Circ.728

Reference is made to MSC/Circ. 668 - Alternative ar-rangements for halon fire-extinguishing systems in ma-chinery spaces and pump-rooms and amendments thereto contained in MSC/Circ.728 - Revised test method for equivalent water-based fire-extinguishing systems for machinery spaces of category A and cargo pump-rooms contained in MSC/Circ.668.


This reference is already present in the text of para-graph 7.2.2 and it may be disregarded.

8 Automatic sprinkler, fire detection and fire alarm systems 8 2.1.2 Reference to resolution A.800(19)

Reference is made to resolution A.800(19) - Revised guidelines for approval of sprinkler systems equivalent to that referred to in SOLAS regulation II-2/12 -


This reference is already present in the text of para-graph 8.2.1.2 and it may be disregarded.

8 2.4.1 Dry pipe systems in case of freezing Such a system may be used where the possibility of freez-ing exists during operation of the ship in cold climates.

MSC/Circ. 847 int. (1) to reg. 12.1.1, 2nd sentence

It is not clear which system the interpre-tation refers to. The CG deemed para-graph 2.4.1 suffi-ciently clear in respect to freezing.


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Comments

9 Fixed fire detection and fire alarm systems 9 2.4.1.1 Definition of �section�

Group of fire detectors and manually operated call points as reported in the indicating unit(s) required by paragraph 2.5.1.3 of this chapter.


The CG found this interpretation un-necessary.

15 Inert gas systems 15 2.3.1.3.

2 Meaning of �gas-safe space� A �gas-safe space� is a space in which the entry of hydro-carbon gases would produce hazards with regard to flam-mability or toxicity.

MSC/Circ. 847 int. to reg. 62.9.2.

This reference is already present in the text of para-graph 15.2.3.1.3.2 and it may be disre-garded.

15 2.4.4 Reference to MSC/Circ.353 and MSC/Circ.387 Reference is made to MSC/Circ.353 - Guidelines for inert gas systems as amended by MSC/Circ.387 � Revised guidelines for inert gas systems.

MSC/Circ. 847 int. to reg. 62.21, amended by MSC/Circ.387

This reference is already present in the text of para-graph 15.2.4.4 and it may be disre-garded.

FP 48/3 ANNEX 5

Page 17

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APPENDIX

EXPLANATORY SKETCHES This appendix contains explanatory sketches to some interpretations of regulations in chapter II-2 of the 1974 SOLAS Convention, as amended, and interpretations of paragraphs in the Fire Safety Systems Code as follows: Chapter II-2 SOLAS Regulation 4.5.1: Corner-to-corner situation in a cofferdam (fig.) Regulation 5.3 and 6.2 Materials used on passenger ships for bulkheads of

accommodation spaces as defined in regulation II-2/3.1 (table)

Regulation 5.3 and 6.2 Materials used in accommodation spaces, as defined in

regulation II-2/3.1, of cargo ships (table) Regulation 9.2.2.1: Arrangement of main vertical zones (figs. 1 to 4) Regulation 9.2.3.4.1: Construction of protected stairways of cargo ships (figs. 1, 2.1

and 2.2) Regulation 9.3.4: Prevention of heat transmission by insulation and structural

details for drainage (figs. 1, 2 and 3) Regulation 10.5: Number of systems, appliances and extinguishers in

machinery spaces Regulation 13.3.2.4.1: Continous fire shelter of means of escape (fig.) Fire Safety Systems Code Chapter 15 paragraph 2.3.2.7: Isolation arrangements in inert gas main (figs. 1 and 2)


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Regulation 4.5.1: Corner-to-corner situation in a cofferdam

cargo tank ballast tank

open deck

safe space

Diagonal plate across the corner

FP 48/3 ANNEX 5

Page 19

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Regulations 5.3 and 6.2: Materials used on passenger ships for bulkheads of accommodation spaces as defined in regulation II-2/3.1

Materials used for bulkheads of accommodation spaces as defined in Reg. II-2/3.1 requirements in chapter II-2 for components

non-com-bustible material

(5.3.1.1)

(5.3.1.2.1)

calorific value

(5.3.2.2)

equivalent volume

(5.3.2.3)

low flame spread

(5.3.2.4)*

smoke production,

toxic products

(6.2)

bulkhead components

(A) (B) (C) (D) (E)

moulding X

wall panel (lining) X

grounds and supports X

draft stops X

insulation X

insulation surface** X (5.3.2.4.1.2)

painted surface** or veneer or fabric**

--

X

X (5.3.2.4.1.2)

X (5.3.2.4.1.2)

painted surface or veneer or fabric

--

X

X

X

X (5.3.2.4.1.1)

X (5.3.2.4.1.1)

X

X

decorative panel X

panel surface X (5.3.2.4.1.1)

X (5.3.2.4.1.1)

steel plate

skirting board (decoration)

X

NOTES:

* Exposed surfaces of corridors and stairway enclosures referred to in regulation II-2/5.3.2.4.1.1 includes floor coverings.

** Where the wall panel is an integral part of the fire insulation in accordance with regulation II-2/9.2.2.3.3, these components are to be of non-combustible material.


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Regulations 5.3 and 6.2: Materials used in accommodation spaces, as defined in regulation II-2/3.1, of cargo ships

FP 48/3 ANNEX 5

Page 21

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Regulation 9.2.2.1: Arrangement of main vertical zones

MVZ1 MVZ2 ECS ECS

L1 L2

Figure 1: ECS serves one MVZ

MVZ1 MVZ2

ECS

Option 1: ECS belongs to MVZ1

L1 L2


L1 L2

FIGURE 2: ECS serves two MVZ

FP 48/3 ANNEX 5

Page 23

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MVZ1 MVZ2 ECS

L1 L2

Figure 3: ECS serves two MVZ (ECS belongs to MVZ 2) MVZ1 MVZ2 ECS


L1 L2

Option 2: ECS should be treated as MVZ

L1 L2 L3

Figure 4: ECS serves two MVZ


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Regulation 9.2.3.4.1: Construction of protected stairways of cargo ships

Fig. 1 staircase well with going round entrances on each deck level, doors self-closing

Fig. 2.1 staircase well - going round by way of corridor all entrance doorsself-closing stairs with open steps

Fig. 2.2 each stairway on one deck levelto be closed with a self-closingdoor stairs with closed steps

FP 48/3 ANNEX 5

Page 25

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Regulation 9.3.4: Prevention of heat transmission by insulation and structural details for drainage

where d = 450 mm where d > 450 mm Fig. 1

Fig. 2 NOTES: λ = thickness if insulation d= depth of stiffener or girder

Fig. 3

λ

λ

λ

d d

λ

d

450 mm or more

λ

450 mm or more

bulkhead, deck, etc.

bulkhead,deck, etc.

λ

450 mmor more

λ

450 mm or more

lining

deck

100 mm or less

λ

λ λ

λ

λ λ

λ

λ

λ


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Regulation 10.5: Number of systems, appliances and extinguishers required in machinery spaces

Systems appliances & extinguishers → Category A Machinery ↓ spaces

Fixed fire extinguishing system

Portable foam applicator *1

Portable foam extinguishers

Add�l Portable foam extinguishers

135 l foam extinguisher

45 l foam extinguishers *2

Sand boxes *3

Local application system

SOLAS paragraph →

10.5.1.1, 10.5.2.1

10.5.1.2, 10.5.2.2

10.5.1.3

10.5.2.3

10.5.1.3

10.5.2.3

10.5.1.4

10.5.6.2

Boiler room containing: Oil-fired boilers

1

1

2N

NA

1*4

-

N

1

Oil-fired boilers and oil fuel units

1

1

2N+2

NA

1*4

-

N

1

Engine room containing: Oil fuel units only

1

-

2

NA

-

-

-

1

Internal combustion machinery

1

1

x

-

y

-

1

Internal combustion machinery and oil fuel units

1

1

x

-

y

-

1

Combined Engine/boiler containing: Internal combustion machinery, oil fired boilers and oil fuel units

1

1

(2N+2) or x whichever is greater

1*4

y*5

N

1

N = number of firing spaces. �2N� means that two extinguishers are o be located in each firing space. X = sufficient number, minimum two in each space, so located that there are at least one portable fire extinguisher within 10 m walking distance from any point. y = sufficient number to enable foam to be directed onto any part of the fuel lubricating oiul pressure systems , gearing and other fire hazard. Notes: *1. May be located at outside of the entrance to the room *2. May be arranged outside of the space concerned for smaller spaces of cargo ships. *3. The amount of sand is to be at least 0.1 m3 *4. Not required for such spaces in cargo ships wherein all boilers contained therein are for domestic services and are less than 175kW. *5. In case of machinery spaces containing both boilers and internal combustion engines (case not explicitly considered in Reg. 10.5) Reg. 10.5.1 and 10.5.2 apply, with the exception that one of the foam fire-extinguishers of at least 45 l capacity or equivalent (required by Reg. 10.5.2.2.2) may be omitted on the condition that the 135 l extinguisher (required by Reg. 10.5.1.2.2) can protect efficiently and readily the area covered by 45 l extinguisher. *6. Oil fired machinery other than boilers such as fired inert gas generators, incinerators and waste disposal units are to be considered the same as boilers insofar as the required number and type of fire fighting appliances are concerned.

FP 48/3 ANNEX 5

Page 27

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Regulation 13.3.2.4.1: Continuous fire shelter of means of escape

Figure

NOTES: ECS: stairway enclosed in a continuous fire shelter HST: �horizontal stairway�; route protected as a category 2 space MVZ: main vertical zone WTB: watertight bulkhead WTC: watertight compartment WTD: watertight door P: group of persons

ECS

ECSHST

4th deck

3rd deck

2nd deck

1st deck

(bulkhead deck)

bottom deck

MVZ MVZ WTB WTB

WTC 1 WTC 2 WTC 3

P2

1 1

1

WTD


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Chapter 15 paragraph 2.3.2.7: Isolation arrangements in inert gas main

NON RETURN VALVE

CARGO PIPING

INERT GAS MAIN

VENTING

Fig. 1

NON RETURN VALVE

CARGO PIPING

INERT GAS MAIN

Fig. 2

________

SPOOL PIECE

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