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STANDARD FOR CERTIFICATION

DET NORSKE VERITAS AS

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��p� �pproval �ro�ramm�sNo. 2.9 Approval Programmes

Type Approval Programmes

No. 771.61

5 ppm Bilge AlarmsMARCH 2014

FOREWORD

DNV is a global provider of knowledge for managing risk. Today, safe and responsible business conduct is both a licenseto operate and a competitive advantage. Our core competence is to identify, assess, and advise on risk management. Fromour leading position in certification, classification, verification, and training, we develop and apply standards and bestpractices. This helps our customers safely and responsibly improve their business performance. DNV is an independentorganisation with dedicated risk professionals in more than 100 countries, with the purpose of safeguarding life, propertyand the environment.

Standards for Certification

Standards for Certification (previously Certification Notes) are publications that contain principles, acceptance criteriaand practical information related to the Society's consideration of objects, personnel, organisations, services andoperations. Standards for Certification also apply as the basis for the issue of certificates and/or declarations that may notnecessarily be related to classification.

© Det Norske Veritas AS March 2014

Any comments may be sent by e-mail to [email protected]

This service document has been prepared based on available knowledge, technology and/or information at the time of issuance of this document, and is believed to reflect the best ofcontemporary technology. The use of this document by others than DNV is at the user's sole risk. DNV does not accept any liability or responsibility for loss or damages resulting fromany use of this document.

Standard for Certification - No. 2.9, March 2014Type Approval Programmes No. 771.61

CHANGES – CURRENT –


CHANGES – CURRENT

General

Det Norske Veritas AS, company registration number 945 748 931, has on 27th November 2013 changed itsname to DNV GL AS. For further information, see www.dnvgl.com. Any reference in this document to“Det Norske Veritas AS” or “DNV” shall therefore also be a reference to “DNV GL AS”.

This is a new document.


Contents –


CONTENTS

CHANGES – CURRENT ................................................................................................................... 3

1 Scope ........................................................................................................................................... 5

2 Background ............................................................................................................................... 5

3 Definitions ................................................................................................................................. 5

4 Conformity assessment of design of product type.................................................................. 6

4.1 Type approval procedures ............................................................................................................................ 6

4.2 Documentation to be submitted.................................................................................................................... 6

5 Design requirements.................................................................................................................. 6

5.1 General ........................................................................................................................................................... 6

5.2 Specific requirements to 5 ppm bilge alarm ............................................................................................... 6

6 Product marking........................................................................................................................ 7

7 Installation requirements.......................................................................................................... 7

7.1 5 ppm bilge alarm ......................................................................................................................................... 7

App. A Test and performance specifications for type approval of 5 ppm bilge alarm........... 9

A.1 General .............................................................................................................................................. 9A.2 Test specifications............................................................................................................................. 9

App. B Specifications for environmental testing for type approval of pollution prevention equipment.................................................................................................... 16

B.1 Test specifications........................................................................................................................... 16

App. C Method for determination of oil content...................................................................... 17

C.1 Scope and application ..................................................................................................................... 17C.2 Checklist.......................................................................................................................................... 17


Sec.1 Scope –


1 Scope

Type approval is a procedure for certifying that the design of a product type is in conformity with a set ofpredetermined requirements.

This type approval programme gives the requirements on which Det Norske Veritas bases its type approval of5ppm bilge alarms.

The procedure for assessment of conformity of manufactured products (production) and the installation onboard is not within the scope of the type approval programme. However if during the type approval process itwill be discovered that certain issues may affect onboard performance and satisfactory operation within givenin this programme limits and requirements then all these issues shall be clarified by the manufacturer beforethe issuance of type approval certificate.

In general the conditions outlined in this programme shall be fulfilled before the type approval certificate isissued.

2 Background

DNV Rules for Ships in relevant parts stipulates that the oil content of the effluent from 5 ppm bilge separatorsto overboard should not exceed 5 ppm. The areas with 5 ppm overboard discharge are also defined by someFlag Authorities. The 5 ppm bilge alarm shall activate to indicate when this level cannot be maintained andinitiate automatic stop of overboard discharge of oily mixtures.

3 Definitions

For the purpose of this programme Pollution prevention equipment comprises:

— 5 ppm bilge alarm.

Bilge water means water which may be contaminated by oil resulting from things such as leakage ormaintenance work in machinery spaces. Any liquid entering the bilge system, bilge piping, tank top or bilgeholding tanks is considered oily bilge water.

5 ppm bilge separator may include any combinations of a separator, filter, coalesces or other means, and alsoa single unit designed to produce an effluent with oil content not exceeding 5 ppm.

5 ppm bilge alarm is an oil content meter with associated alarm which is capable of detecting and measuring5 ppm or less of oil in a ship’s bilge water overboard discharge.

ppm means parts of oil per million parts of water by volume.

ppm display is a numerical scale display of the 5 ppm bilge alarm.

Automatic stopping device is a device used, where applicable, to automatically stop any discharge overboardof oily mixture when the oil content of the effluent exceeds 5 ppm. The automatic stopping device shouldconsist of a valve arrangement installed in the effluent outlet line of the 5 ppm bilge separator whichautomatically diverts the effluent mixture from being discharged overboard back to the ship's bilges or bilgetank when the oil content of the effluent exceeds 5 ppm.

Accredited laboratory means:

a) DNV's laboratories at Høvik, Norway.

b) At a European Laboratory accredited for all the required tests by an Accreditation Body being member ofEuropean Accreditation, EA.

c) At a non-European Laboratory accredited by an organisation who has signed a multilateral agreement(MLA) with EA.

d) At a laboratory having the quality system audited by DNV. A quality audit by DNV means that a competentperson has gone through the Quality System of the laboratory in accordance with ISO/IEC 17025 (andEN 45001) and that a “Statement of Recognition” has been issued.

e) At a laboratory recognised/certified by the Marine Administration of one EU Member State or by anotherNotified Body (MED).

f) At any laboratory when testing is witnessed by a DNV surveyor.


Sec.4 Conformity assessment of design of product type –


4 Conformity assessment of design of product type

4.1 Type approval procedures

All the aspects such as obtaining, retention, renewal, suspension and withdrawal of type approval certificateare described in DNV Standard for Certification – No.1.2. Type Approval is valid for 4 years.

4.2 Documentation to be submitted

The following documentation shall be submitted electronically well in advance before the testing at themanufacturer:

— DNV Application form (90.01a)— performance test plan according to App.A— environmental test plan according to App.B — function test plan — control and automation documentation:

— hardware, firmware and software revision information— alarm list.

— assembly drawings showing main dimensions and equipment arrangement— material list with reference to hazardous materials— electrical system and instrumentation layout and diagrams— operation and Maintenance Manual and Instructions.

These documents will be evaluated in accordance with this document and other applicable rules. Manufacturermust submit a proposal for performance testing which must be approved before the testing can begin.

Note:

All drawings and descriptions are to be marked with drawing number, name, revision no., issue date, etc..Manufacturer must submit a proposal for performance test programme which must be approved before the testing canbegin.

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5 Design requirements

5.1 General

This programme is considered to be applicable for use of pollution prevention equipment in conjunction withoily bilge water and ballast water from fuel oil tanks, as these are of a low or medium capacity, and areconditioned by the need to avoid discharging oil mixtures with oil content more than 5 ppm of the mixture.

The production model of the pollution prevention equipment, for which the approval will apply, shall beidentical to the equipment, type-tested and environmental tested in accordance with the test and performancespecifications contained in App.A and App.B.

The routine maintenance permitted operating parameters and procedures for the 5 ppm bilge alarm should beclearly defined by the manufacturer in the associated Operating and Maintenance Manuals.

5.2 Specific requirements to 5 ppm bilge alarm

a) The 5 ppm bilge alarm shall be robust and practical instrument suitable for shipboard use. It shall resistcorrosion in conditions of the marine environment and shall be compatible with the liquids that it willmonitor.

b) The 5 ppm bilge alarm shall, if intended to be fitted in locations where flammable atmosphere may bepresent, comply with the relevant safety regulations for such spaces. Any electrical equipment which is partof the 5 ppm bilge alarm should be placed in a non-hazardous area, or should be certified as safe for use ina hazardous atmosphere. Any moving parts which are fitted in hazardous areas should be arranged so as toavoid the formation of static electricity.

c) The 5 ppm bilge alarm shall not contain or use any substance of a dangerous nature, unless adequatearrangements are provided to eliminate any hazards introduced thereby.

d) A ppm display shall be provided. The ppm display should not be affected by emulsions and/or the type ofoil given that the test fluid detailed in Appendix [A.2.7] is deemed to represent a mixture that may beexpected in the machinery space bilges of a ship. It should not be necessary to calibrate the 5 ppm bilgealarm on board ship, but onboard testing according to the manufacturer’s instructions shall be permitted.


Sec.6 Product marking –


The accuracy of the meter shall be such that the reading will represent within +/-2 ppm, the actual oilcontent of the sample being tested.

e) The response time of the 5 ppm bilge alarm, that is, the time which elapses between an alteration in thesample being supplied to the 5 ppm bilge alarm and the ppm display showing the correct response, shallnot exceed 5 seconds.

f) The 5 ppm bilge alarm shall be fitted with an electrical/electronic device which should be pre-set by themanufacturer to activate when the effluent exceeds 5 ppm and shall do so with an accuracy of +/-1 ppm.This should also operate automatically if at any time the 5 ppm bilge alarm should fail to function, requirea warm-up period or otherwise be de-energized. The accuracy of a 5 ppm bilge alarm should remain withinthe above limits despite the presence of contaminants other than oil, and the power supply varying by 10%from the design value - i.e. in respect of electricity, compressed air, etc.

g) It is required that a simple means be provided aboard ship to check on instrument drift, repeatability of theinstrument reading, and the ability to re-zero the instrument.

h) The 5 ppm bilge alarm shall record date, time and alarm status, and operating status of the bilge separator.The recording device should also store data for at least 18 months and should be able to display or print aprotocol for official inspections as required. In the event the 5 ppm bilge alarm is replaced, means shouldbe provided to ensure the data recorded remains available on board for 18 months.

i) To avoid wilful manipulation of 5 ppm bilge alarms, the following items shall be included:

— every access of the 5 ppm bilge alarm beyond the essential requirements of [5.2] (f) requires thebreaking of a seal

— the 5 ppm bilge alarm should be so constructed that the alarm is always activated whenever clean wateris used for cleaning or zeroing purposes. There shall not be any possibility to feed the 5ppm bilge alarmwith clean water during the normal operation (when effluent from BWS is monitored by 5ppm bilgealarm).

— bilge alarm shall be so constructed that the alarm is always activated whenever no media flow throughthe bilge alarm is detected by flow sensor or other alternative means.

j) The accuracy of the 5 ppm bilge alarms shall be checked according to manufacturer recommendation, butnot less than at least every 2.5 years at IOPP or Class Certificate intermediate and renewal surveys.Alternatively the unit may be replaced by a calibrated type approved 5 ppm bilge alarm. The calibrationcertificate for the 5 ppm bilge alarm, certifying date of last calibration check, should be retained onboardfor inspection purposes. The accuracy checks can only be done by the manufacturer or persons authorizedby the manufacturer.

6 Product marking

The product is to be marked with name of manufacturer, type designation and serial number.

7 Installation requirements

7.1 5 ppm bilge alarm

a) For future inspection purposes on board ship, a sampling point shall be provided in a vertical section of thewater effluent piping as close as is practicable to the 5 ppm bilge separator outlet. Re-circulating facilitiesshall be provided, after and adjacent to the overboard outlet of the stopping device to enable the 5 ppm bilgeseparator system, including the 5 ppm bilge alarm and the automatic stopping device, to be tested with theoverboard discharge closed (see Figure 7-1).

The re-circulating facility shall be so configured as to prevent under all operating conditions any by-passof the oily-water- separator.

b) The layout of the installation shall be arranged so that the overall response time (including the responsetime of the 5 ppm bilge alarm) between an effluent discharge from the 5 ppm bilge separator exceeding 5ppm, and the operation of the Automatic Stopping Device preventing overboard discharge, should be asshort as possible and in any case not more than 20 s.

c) The arrangement on board ship for the extraction of samples from the 5 ppm bilge separator discharge lineto the 5 ppm bilge alarm should give a truly representative sample of the effluent.

d) A vessel fitted with a 5 ppm bilge alarm shall, at all times, have on board a copy of the Operating andMaintenance manuals.


Sec.7 Installation requirements –


Figure 7-1Typical onboard arrangement of pollution prevention equipment


App.A Test and performance specifications for type approval of 5 ppm bilge alarm –


Appendix A

Test and performance specifications for type approval of 5 ppm bilge alarm

A.1 General

A.1.1

These Test and Performance Specifications relate to 5 ppm bilge alarms. In addition, the electrical and

electronic section of these systems should be in accordance with the Specifications for Environmental Testing

contained in App.B. Test reports with the results of the tests must be submitted to DNV for approval. A function

test of the 5 ppm bilge alarm must be performed and witnessed by a DNV surveyor, following an approved

function test protocol.

A.1.2

The 5 ppm bilge alarm being tested should comply with all the relevant requirements of the technical specific

requirements contained in [5.2].

A.1.3

Calibration test as mentioned [A.2.8] or [A.2.9] b) is mandatory for bilge alarm, and other test should be carried

out as far as practicable if were witnessed by DNV surveyor on the prototype.

A.2 Test specifications

A.2.1

The sampling arrangement for the test rig should be such that a representative homogeneous sample is obtained

under all conditions of operation and under all operational proportions of oil content. The sample should be

obtained from the full flow through the 5 ppm bilge alarm, but when this is impracticable the sampling

arrangements shown in Figure A-1 should be used. Special care should be given to this stage of the process and

the validity of the resultant findings.

A distance A, not greater than 400mm

B distance B, sufficient to insert sampling bottle

C dimension C, straight length should not be less than 60mm

D dimension D, pipe thickness should not be greater than 2mm

E detail E, chisel-edged chamfer (30º)

Figure A-1Diagram of sampling arrangements




A.2.2

Samples should be taken in accordance with ISO 9377- 2:2000. The sample is to be extracted on the same dayof collection, and be sealed and labelled in the presence of surveyor and arrangements should be made foranalysis as soon as possible and in any case within seven days provided the samples are being kept between2°C and 6°C at the accredited laboratories.

A.2.3

The oil content of the samples should be determined in accordance with App.C.

A.2.4

In the presentation of the results, the following data testing methods and readings should be reported:

1) Properties of test fluids A and B:

— density at 15°C— kinematic viscosity (centistokes at 100°C/40°C)— flashpoint— ash— water content.

2) Properties of test fluid C:

— type of surfactant— particle size percentage of the non-soluble suspended solids; and— surfactant and iron oxide quality verification.

3) Properties of the water in the water tank:

— density of water at 20°C— details of any solid matter present.

4) A diagram of the test rig.

5) A diagram of the sampling arrangement.

6) The method used in analysis of all samples taken and the results thereof, together with oil content meterreadings, where appropriate.

A.2.5

During the various tests, the response time of the 5 ppm bilge alarm shall be checked and it shall be notedwhether alarms operate adequately when a pre-stated threshold is exceeded.

A.2.6

A diagrammatic arrangement of a test facility for evaluating the performance of the 5 ppm bilge alarm is givenin Figure A-2. The accuracy of the 5 ppm bilge alarm will be determined by comparing its readings against aknown flow of test fluid injected into a known flow of water. The grab samples taken shall be analyzed in theaccredited laboratory by the methods specified in App.C. The results of the laboratory analysis shall be usedfor correction and to indicate sampling and test equipment variability. The water flow rate shall be adjusted sothat the entire test fluid-water flow passes through the 5 ppm bilge alarm, except the intermittent grab samplestream. Special care should be given to keep, continuously, a constant test fluid content in the water that flowsinto the 5 ppm bilge alarm. The metering pumps should be adjusted to deliver a nearly continuous quantity oftest fluid. If test fluid injection becomes intermittent at low concentrations, the test fluid may be pre-mixed withwater to provide continuous flow. The test fluid injection point should be immediately up-stream of the 5 ppmbilge alarm inlet to minimize time lags.




Figure A-2Diagrammatic arrangements of test facilities

A.2.7

Tests should be performed using three grades of test fluids:

1) Test fluid “A” which is a marine residual fuel oil in accordance with ISO 8217, type RMG 35 (density at15ºC not less than 980 kg/m3).

2) Test fluid “B” which is a marine distillate fuel oil in accordance with ISO 8217, type DMA (density at 15ºCnot less than 830 kg/m3).

3) Test fluid “C” which is a mixture of an oil-in-fresh water emulsion, in the ratio whereby 1 kg of the mixtureconsists of:

— 947.8 g of fresh water— 25.0 g of test fluid “A”— 25.0 g of test fluid “B”— 0.5 g surfactant (sodium salt of dodecylbenzene sulfonic acid) in the dry form— 1.7 g “iron oxides” (The term “iron oxide” is used to describe black ferrosoferric oxide (Fe3 O4) with

a particle size distribution of which 90% is less than 10 microns, the remainder having a maximumparticle size of 100 microns).

A.2.7.1 Preparation

1) Measure out 1.2 times the quantity of surfactant required for the “Test with Test Fluid C” as described in[A.2.8] and [A.2.9].

2) Mix it with fresh water and stir well in a small container (e.g., a beaker or bucket) to make a mixture(“Mixture D”) until the surfactant has been thoroughly dissolved.

A.2.7.2 To make test fluid C in the test fluid tank (Figure A-3)

1) Fill test fluid tank with fresh water with a quantity 1.2 times the volume of the total quantity of water in thetest fluid “C” needed for the test described in [A.2.8] and [A.2.9].

2) Operate centrifugal pump B running at a speed of not less than 3,000 rpm (nominal) with a flow rate atwhich the volume of the test fluid has been changed out at least once per minute.

3) Add “Mixture D” first, followed by oil and suspended solids (iron oxides) respectively, both 1.2 times ofthe required amounts, to the fresh water in the tank.




4) To establish a stable emulsion keep running the centrifugal pump B for one hour and confirm no oil floatson the surface of the test fluid.

5) After the one hour stated in paragraph (6) above keep running the centrifugal pump B at reduced speed toapproximately 10% of original flow rate, until the end of the test.

Figure A-3Tank of test fluid “C”

Note:

1) The tank should be of a cylindrical shape. The level of the water should be: 2D > H > 0.5D, when preparing testfluid “C”.

2) Outlet going to centrifugal pump B should be placed at as low a position to the tank as possible.

3) Inlet to the tank should be fitted at the centre of tank bottom so that the mixture flows upward to obtain uniformand stable emulsion.

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A.2.8 Calibration test

The 5 ppm bilge alarm will be calibrated and zeroed as per the manufacturer's instructions. It will then be testedwith the three test fluids “A”, “B” and “C”, as specified in [A.2.7], at the following oil concentrations in partsper million: 0, 2, 4, 6, 9, 15 ppm and at the full scale of the meter. Each concentration test will last for 15 min.Following each concentration test, the 5 ppm alarm will be run on oil-free water for 15 min and the readingnoted. If it proves necessary to re-zero or re-calibrate the 5 ppm bilge alarm during this test, this fact will benoted.

Calibration test at 5ppm may be omitted if the equipment is separately certified for 5ppm.

A.2.9 Alternative calibration test

a) Calibration and testing shall be carried out using a light distillate fuel oil having a relative density of 0.83at 15°C (Test Liquid “B”).

b) The oil content meter shall be calibrated at 0, 2, 4, 6, 9 and 15 ppm. A complete calibration curve shall beprovided in the format shown in Figure A-4. Calibration test at 5ppm may be omitted if the equipment isseparately certified for 5ppm.

c) Five tanks for pre-mixed oily mixtures, one tank of fresh water and one settling tank for drainage, withassociated piping and testing equipment, shall be provided in a testing arrangement as shown in Figure A-5.

d) With all valves closed the tanks shall be filled with liquid, as appropriate.

e) Valve A shall be opened and fresh water shall be allowed to flow through the meter for 5 minutes, at whichtime the reading on the meter shall be noted and the point shall be marked on the calibration diagram. Thispoint should be the zero point on the meter scale. If this is not so, corrective action shall be taken. Valve Ashall be shut.




f) Valve B shall be opened and the 2 ppm oily mixture shall be allowed to flow through the meter for5 minutes, at which time the meter reading point shall be marked on the calibration diagram. Valve B shallbe closed.

g) Valve A shall again be opened and fresh water shall be allowed to flow through the meter. The flow of thecleansing water shall be continued until the meter reading has been zeroed for 5 minutes. Valve A shall thenbe closed.

h) Valve C shall be opened and the calibration operation shall be continued using an identical calibration andcleansing sequences to those described in items f) and g).

i) The calibration point for the 6, 9 and 15 ppm oily mixtures shall be plotted, using an identical calibrationand cleansing sequence to those described in items f) and g).

j) The six calibration points shall be joined in order to establish the calibration curve.

Figure A-4Bilge alarm calibration graph format




Figure A-5Alternative diagrammatic arrangements of test facilities

A.2.10 Contaminant and color test

The 5 ppm bilge alarm should undergo contaminant and color tests as follows:

1) The 5 ppm bilge alarm should be run on a mixture of clean water and 4 ppm test fluid “B” and readingnoted.

2) The water supply should be changed from 4 ppm test fluid “B” and clean water to 4 ppm test fluid “B” andwater contaminated with iron oxide in a concentration of 4 ppm.

3) Any shift in the 5 ppm bilge alarm reading should be noted. The reading should be within the accuracylimits specified in [5.2] d).

4) The procedure specified in 2) and 3) above should be repeated with iron oxide concentrations of 50 ppmand 100 ppm respectively.

5) The 5 ppm bilge alarm should be run on a mixture of clean water and 4 ppm test fluid “B” and its readingnoted.

6) The water supply should be changed from clean water to very salt water (a solution of 6% common saltwith clean water).

7) Any shift in the 5 ppm bilge alarm reading should be noted. The reading should be within the accuracylimits specified in paragraph [5.2].d; and

8) Sufficient water should be available in the mixing tank to ensure an effective test of not less than 15 min.

A.2.11 Sample pressure or flow test

The 5 ppm bilge alarm should be run on 4 ppm test fluid “B” sample. The water pressure or flow rate of themixture should be adjusted from one half normal, normal and twice normal. Any effect of these changes on the5 ppm bilge alarm ppm display reading should be noted and recorded on the Certificate. This test may requiremodification for 5 ppm bilge alarms with flow or pressure regulators or 5 ppm bilge alarms designed todischarge into an ambient pressure sump.

A.2.12 Shut off tests

The 5 ppm bilge alarm should be run on 4 ppm test fluid “B” sample. The water and test fluid injection pumpsshould be shut off. The 5 ppm bilge alarm will be left turned on with no other changes made. After 8 hours, thewater and test fluid injection pump should be turned on and set to provide the mixture of 4 ppm. The 5 ppmbilge alarm ppm display readings before and after each test and any damage to the 5 ppm alarm should be notedand recorded on the certificate.




A.2.13 Utilities supply variation test

If the 5 ppm bilge alarm requires any utilities besides electricity, it should be tested with these utilities at 110%and 90% of the design figures.

A.2.14 Calibration and zero drift test

The 5 ppm bilge alarm should be calibrated and zeroed. 4 ppm test fluid “B” sample will run through the 5 ppmbilge alarm for eight hours and any calibration drift noted. Following this, the 5 ppm bilge alarm should run onoil-free water and any zero drift noted and recorded on the Certificate. During this test grab samples should betaken 0, 2, 4, 6, and 8 hours into the test schedule to verify any calibration drift. During the last hour, the alarmmust be inclined at an angle of 22.5º with the plane of its normal operating position.

A.2.15 Response time test

The response time is to be taken for the 5 ppm bilge alarm to give an alarm at 5 ppm oil concentration after thesupply to the 5 ppm bilge alarm is changed from clean water to oily water having a concentration of more than5 ppm oil. Test is to be carried out with test fluid “A”, “B” and “C” in order to verify the compliance with [7.1]a).

A.2.16

A specification of the instrument concerned and a diagrammatic presentation of the test arrangements shouldbe provided and the following data should be reported.

1) Types and properties of test fluids used in the tests (refer to [A.2.4] and [A.2.7]).

2) Details of contaminants used, in the form, for example, of a supplier's certificate or laboratory test protocol.

3) Results of tests and analysis of grab samples.


App.B Specifications for environmental testing for type approval of pollution prevention equipment –


Appendix B

Specifications for environmental testing for type approval of pollution

prevention equipment

B.1 General

The specifications for environmental testing for type approval relate to the electrical and electronic sections of:

— 5 ppm bilge alarm.

Satisfactory compliance with the environmental tests laid down in these guidelines and specifications, whereapplicable, should be shown on the environmental test protocol issued by the testing laboratory. The protocolshall include at least a statement of the tests conducted on the equipment, including the results thereof. Theenvironmental test protocol shall be endorsed by either the surveyor or a competent authority of themanufacturer's home country to confirm that the laboratory is approved to conduct such tests. The protocolshall also be signed and dated by the person in charge of the laboratory.

B.1 Test specifications

B.1.1 Testing requirements

The electrical and electronic sections of the equipment in the standard production configuration should besubjected to the programme of environmental tests set out in this specification at the accredited laboratory. Acopy of the environmental test document, in a format similar to that specified in [B.1], should be submitted tothe Class by the manufacturer, together with the application for type approval.

B.1.2 Test specification details

Equipment should operate satisfactorily on completion of each of the following environmental tests:

B.1.2.1 Vibration tests:

1) A search should be made for resonance over the following range of frequency and amplitude ofacceleration:

a) 2 to 13.2 Hz with an amplitude of ± 1mm

b) 13.2 to 80 Hz with an acceleration of ± 0.7 g. This search should be made in each of the three planes ata rate sufficiently low to permit detection of resonance.

2) The equipment should be vibrated in the planes at each major resonant frequency for a period of 2 hours.

3) If there is no resonant frequency, the equipment should be vibrated in each of the planes at 30 Hz with anacceleration of ± 0.7 g for a period of 2 hours.

4) After completion of the tests specified in 2) or 3) a search should again be made for resonance and thereshould be no significant change in the vibration pattern.

B.1.2.2 Temperature tests (procedure according to IEC60068-2-2 Tests Bb, Bd)

1) Equipment that may be installed in an enclosed space that is environmentally controlled, including anengine-room, should be subjected, for a period of not less than 2 h, to:

a) a low temperature test at 0°C

b) a high temperature test at 55°C.

2) At the end of each of the tests referred to, the equipment should be switched on and it should functionnormally under the test conditions.

B.1.2.3 Humidity tests

Equipment should be left switched off for a period of 2 h at a temperature of 55°C in an atmosphere with arelative humidity of 90%. At the end of this period the equipment should be switched on and should operatesatisfactorily for 1 hour (First the temperature test of the electronic part should be operated under the testcondition mentioned under [B.1.2.2], followed by the humidity test.)

B.1.2.4 Inclination test

Equipment should operate satisfactorily at angles of inclination up to 22.5° in any plane from the normaloperating position.

B.1.2.5 Reliability of electrical and electronic equipment

The electrical and electronic components of the equipment should be of a quality guaranteed by themanufacturer and suitable for their intended purpose.


App.C Method for determination of oil content –


Appendix C

Method for determination of oil content

C.1 Scope and application

The International Standard ISO 9377-2:2000 “Water quality - Determination of hydrocarbon oil index - Part 2:Method using solvent extraction and gas chromatography” specifies a method for the sampling and subsequentdetermination of the hydrocarbon oil index in water using solvent extraction and gas chromatography. Thismethod should be used for the determination of oil content requirements outlined in this programme.

C.2 Checklist

Test data and results of tests conducted on a 5 ppm bilge alarm in accordance with Appendix A to the DNVtype approval programme of 5ppm bilge alarms

Environmental testing of the electrical and electronic sections of the 5 ppm bilge alarm has been carried out inaccordance with App.C to the “DNV Type Approval Programme of 5ppm Bilge Alarms”. The equipmentfunctioned satisfactorily on completion of each test specified on the environmental test protocol.

5 ppm bilge separator submitted by

Test location

Method of sample analysis

Samples analysed by

Test fluid “A”

Density at 15ºC

Viscosity Centistokes at 100ºC

Flashpoint ºC

Ash content %

Water content at start of test %

Test fluid “B”

Density at 15ºC

Viscosity Centistokes at 40ºC

Flashpoint ºC

Ash content %

Water content at start of test %

Test fluid “C”

Surfactant - documentary evidence*

Iron oxides - documentary evidence*

* Certificate or laboratory analysis.

Test water

Density at 20ºC

Solid matter present

Test temperatures

Ambient ºC

Test fluid “A” ºC

Test fluid “B” ºC

Test fluid “C” ºC

Test water ºC




Calibration test and response time

Contaminants and color test

Sample pressure test

Diagram of test rig attached

Diagram of sampling arrangement attached

Test valueTest fluid “A” Test fluid “B” Test fluid “C”

Measured Grab Measured Grab Measured Grab

0 ppm

2 ppm

4 ppm

6 ppm

9 ppm

15 ppm

Full scale

Water temperature [ºC]

Re-zero Yes/No Yes/No Yes/No

Recalibrate Yes/No Yes/No Yes/No

Response time [sec]

Oil content meter reading [ppm]

Clean water and 4 ppm test fluid “B”

Iron Oxide 4 ppm

Iron Oxide 50 ppm

Iron Oxide 100 ppm

Clean water and 4 ppm test fluid “B”

Very salt water (6%) and 4 ppm test fluid “B”

Total testing time:

Pressure [bar] or flow [L/min] 5 ppm alarm reading [ppm]

50% of normal pressure/flow:

Normal pressure/flow:

200% of normal pressure/flow

Deviations:




Shut off test

Utilities supply variation test

Calibration and zero drift test

Response time test

5 ppm bilge alarm reading before shut-off ppm

5 ppm bilge alarm reading after start-up ppm

Damage to 5 ppm bilge alarm:

110% voltage effects

90% voltage effects

110% air pressure effects

90% air pressure effects

110% hydraulic pressure effects

90% hydraulic pressure effects

Grab samples after: Measured oil content [ppm]

0 hours

2 hours

4 hours

6 hours

8 hours

Calibration drift ppm

Zero drift ppm

Test fluid Response time [sec]

“A”

“B”

“C”

5 ppm bilge alarms - rules and standards - dnv gl · 5 ppm bilge alarm is an oil content meter with...

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