5 ppm bilge alarms - rules and standards - dnv gl for certification - no. 2.9, february 2015 type...

STANDARD FOR CERTIFICATION

The content of thaccepts that it is verification servipursuant to this dconsequences aris

The electronic

No. 2.9 Approval Programmes

Type Approval ProgrammesNo. 771.61

5 ppm bilge alarmsFEBRUARY 2015

DET NORSKE VERITAS AS

is service document is the subject of intellectual property rights reserved by Det Norske Veritas AS (DNV). The userprohibited by anyone else but DNV and/or its licensees to offer and/or perform classification, certification and/orces, including the issuance of certificates and/or declarations of conformity, wholly or partly, on the basis of and/orocument whether free of charge or chargeable, without DNV's prior written consent. DNV is not responsible for theing from any use of this document by others.

pdf version of this document found through http://www.dnvgl.com is the officially binding version

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 CertificationStandards 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 February 2015

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, February 2015Type Approval Programmes No. 771.61

CHANGES – CURRENT –

CHANGES – CURRENT

GeneralThis document supersedes Type Approval Programmes No. 771.61, March 2014.

Text affected by the main changes in this edition is highlighted in red colour. However, if the changes involve

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”.

a whole chapter, section or sub-section, normally only the title will be in red colour.

Main changes— No real technical changes have been done. Main changes are corrections of misprints, organizing of the

contents (order of subsections etc.), and more comprehensive text to describe the test requirements clearer(text in App.A and forms in App.D). The testing requirements are unchanged.

— The fail-safe requirements (necessary to avoid discharge > 5 ppm oil) already published in TAP 771.60 hasbeen included.

— An “alternative calibration test” has been removed to harmonise with the MEPC.107(49). — Surplus text has been deleted.

In addition to the above stated main changes, editorial corrections may have been made.

Editorial corrections



Contents –

CONTENTS

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

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

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

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

4 Conformity assessment of design of product type.................................................................. 64.1 Type approval procedures ............................................................................................................................ 6

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

5 Design requirements.................................................................................................................. 65.1 General ........................................................................................................................................................... 6

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

5.3 Installation requirements to the 5 ppm bilge arrangement ....................................................................... 7

6 Testing ........................................................................................................................................ 8

7 Limitation on the certificate ..................................................................................................... 8

8 Product marking........................................................................................................................ 8

9 References .................................................................................................................................. 9

App. A Specifications for performance test ............................................................................. 10A.1 General ............................................................................................................................................ 10A.2 Test specifications........................................................................................................................... 10

App. B Specifications for environmental testing ..................................................................... 14B.1 General ............................................................................................................................................ 14B.2 Test specifications........................................................................................................................... 14

App. C Method for determination of oil content...................................................................... 15C.1 Scope and application ..................................................................................................................... 15

App. D Forms for test data and results ..................................................................................... 16D.1 Oil-content analysis......................................................................................................................... 16D.2 Test fluids data ................................................................................................................................ 16D.3 Test rig and sampling arrangement ................................................................................................. 16D.4 Display calibration and activation-accuracy tests ........................................................................... 17D.5 Contaminant and colour test ........................................................................................................... 17D.6 Sample pressure test ....................................................................................................................... 18D.7 Shut-off test ..................................................................................................................................... 18D.8 Utilities supply variation test .......................................................................................................... 18D.9 Calibration and zero-drift test ......................................................................................................... 19D.10 Response time test........................................................................................................................... 19



Sec.1 Scope –

1 ScopeType 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 DNV GL bases its type approval of 5 ppmbilge 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.

The conditions outlined in this programme shall be fulfilled before the type approval certificate is issued.

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

Accredited laboratory means:

a) DNV GL's laboratories at Høvik, Norway.

b) a European laboratory accredited for all the required tests by an accreditation body being member ofEuropean Accreditation, EA

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

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

e) a laboratory recognised/certified by his country marine administration provided acceptance by theresponsible approval center in DNV GL

f) any laboratory when testing is witnessed by a qualified DNV GL surveyor

g) at the manufacturer’s premises provided the test set-up is approved by and the testing is witnessed by aqualified DNV GL surveyor. Such arrangement is to be approved by the responsible approval center inDNV GL before testing.

The above tests shall be documented by a test report issued by the laboratory/manufacturer. If the testing iswitnessed by DNV GL, the report shall be signed and stamped by the DNV GL representative.

bilge water means water which may be contaminated by oil resulting from things such as leakage or maintenance work in machinery spaces. Any liquid entering the bilge system, bilge pip-ing, tank top or bilge holding tanks is considered oily bilge water

5 ppm bilge separator may include any combinations of a separator, filter, coalesces or other means, and also a 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 measuring 5 ppm or less of oil in a ship’s bilge water overboard discharge

ppm means parts of oil per million parts of water by volumeppm display is a numerical scale display of the 5 ppm bilge alarmautomatic stopping device is a device used, where applicable, to automatically stop any discharge overboard of oily

mixture when the oil content of the effluent exceeds 5 ppm. The automatic stopping de-vice should consist of a valve arrangement installed in the effluent outlet line of the 5 ppm bilge separator which automatically diverts the effluent mixture from being discharged overboard back to the ship's bilges or bilge tank when the oil content of the effluent ex-ceeds 5 ppm



Sec.4 Conformity assessment of design of product type –

4 Conformity assessment of design of product type

4.1 Type approval proceduresAll 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 submittedThe following documentation shall be submitted electronically well in advance before the testing:

— DNV GL type approval application form (90.01a).— Performance test plan according to App.A with oil-content analysis according to App.C, including

laboratory accreditation certificate if test and/or sample analysis is not witnessed by DNV GL, and usingtest forms outlined in App.D.

— Environmental test plan according to App.B, including laboratory accreditation certificate.— Functional description of all essential parts of the equipment.— Hardware, firmware and software revision information, as applicable, necessary to identify the equipment

under test.— Alarm list (list of all events that activate the alarm).— Assembly drawings showing main dimensions and equipment arrangement.— Mechanical drawings with detailed drawings of all mechanical components and with material list.— Material list with reference to hazardous materials.— Electrical system and instrumentation layout and diagrams and list of components.— Operation, installation and maintenance manual including routine maintenance and permitted operating

parameters.— Special operational limitations, if any.— Drawings of permanent plates giving any operational or installation limits, if any.— Specification if equipment should be certified for hazardous area (EX) or be limited to a non-hazardous

area only.— Hazardous-area certification documentation as applicable if the equipment is to be certified for hazardous

area (EX).— Asbestos-free declaration.— Reports with results from performance test according to App.A with oil-content analysis according to

App.C and using test forms outlined in App.D.— Report with results from environmental test (App.B).

The test plans are to be approved prior to testing.These documents will be evaluated in accordance with this document and other applicable rules. Themanufacturer shall provide documentation on all the requirements in this document, not limited to thedocument list above. The documentation submitted shall be clearly labelled and divided in such a way that allelements below can be easily identified. All drawings and descriptions are to be marked with drawing number,item name, revision no. and/or issue date, etc. The documentation shall be generic drawings suitable for a typeapproval.

5 Design requirements

5.1 General This programme is applicable for use 5 ppm bilge alarms in conjunction with oily bilge water and ballast waterfrom fuel oil tanks, as these are of a low or medium capacity, and are conditioned by the need to avoiddischarging oil mixtures with oil content more than 5 ppm of the mixture.The production model of the 5 ppm bilge alarm shall be identical to the bilge alarm type-tested and environmentaltested in accordance with the test and performance specifications 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 operation, installation and maintenance manual.

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.


Standard for Certification - No. 2.9, February 2015Type Approval Programmes No. 771.61 Sec.5 Design requirements –

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 [A.2.1.4] is deemed to represent a mixture that may be expected inthe machinery space bilges of a ship. It should not be necessary to calibrate the 5 ppm bilge alarm on boardship, but onboard testing according to the manufacturer’s instructions shall be permitted. The accuracy ofthe meter shall be such that the reading will represent within +/-2 ppm the actual oil content of the samplebeing 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.Activation of alarm should also operate automatically if at any time the 5 ppm bilge alarm should fail tofunction, require a warm-up period or otherwise be de-energized. The accuracy of a 5 ppm bilge alarmshould remain within the above limits despite the presence of contaminants other than oil, and the powersupply 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 fail-safe arrangements listed in [5.3] e) shall beincluded.

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.

k) The 5 ppm bilge alarm must be designed to operate in each plane that forms an angle of 22.5° with the planeof its normal operating position, and this shall be verified through the test requirements in [A.2.2.6] and[B.2.2.4].

l) The 5 ppm bilge alarm shall be tested according to and comply with test requirements of Sec.6.

5.3 Installation requirements to the 5 ppm bilge arrangement

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 5-1).The re-circulating facility shall be so configured as to prevent under all operating conditions any by-passof the 5 ppm bilge 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 exceeding5 ppm, 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 operation,installation and maintenance manual.

e) The onboard arrangement of the 5 bilge alarm, 5 ppm bilge separator and automatic stopping device shallfunction automatically. However, fail-safe arrangements to avoid any discharge in case of malfunctionshould be provided. The requirements to automatics and fail safe are:

1) The alarm is always activated whenever clean water is used for cleaning or zeroing purposes.2) The alarm is always activated whenever no flow of sample through the alarm is detected by the flow

sensor.3) Any alarm will activate the automatic stopping device and lead to recirculation.



Sec.6 Testing –

4) The overall response time (including the response time of the alarm) between the effluent dischargeexceeding 5 ppm oil and to the automatic stopping device preventing the overboard discharge is lessthan 20 s.

5) By-passing the alarm during normal operation shall by no means be possible.

6) Every access of the alarm (beyond check on instrument drift, repeatability of the instrument reading,and the ability to re-zero the instrument) requires the breaking of a seal.

Figure 5-1Typical onboard arrangement of 5 ppm bilge separator, 5 ppm bilge alarm and automatic stopping device

6 TestingThe 5 ppm bilge alarm shall undergo the following prototype tests:

a) Performance test according to App.A with oil-content analysis according to App.C and using the forms asoutlined in App.D.

b) Environmental test according to App.B.

It is the manufacturer’s responsibility to ensure that the testing is performed according to the requirements inthis type approval programme.

7 Limitation on the certificateIf the bilge alarm is not EX type approved, the following limitation will be included in the certificate:

“Installation of the equipment in spaces subject to explosion hazard is not permitted.”

8 Product markingThe final product shall be provided with visible marking, which completely identifies the product and itscomponents according to drawings/equipment specification.

The marking shall give at least the following information:

— identification of manufacturer — equipment type designation or model identification — serial number — revision information, as applicable, for all firmware or software modules installed per hardware unit,

necessary to identify the equipment, permanently marked.



Sec.9 References –

9 ReferencesDNV GL type approval application form (90.01a)

DNV standard for certification - No.1.2 Type Approval

MEPC.107(49) Revised guidelines and specifications for pollution prevention equipment for machinery spacebilges of ships Annex Part 1 Test and performance specifications for type approval of 15 ppm bilge separators

ISO 8217 Petroleum products -Fuels (class F) - Specifications of marine fuels

ISO 9377-2:2000 Water quality - Determination of hydrocarbon oil index - Part 2: Method using solventextraction and gas chromatography

ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories

IEC 60068-2-2 Environmental testing - Part 2-2: Tests - Test B: Dry heat



App.A Specifications for performance test –

Appendix ASpecifications for performance test

A.1 GeneralThese performance test specifications relate to 5 ppm bilge alarms. The oil content of the samples should bedetermined in accordance with App.C. Result forms according to App.D should be used.

The 5 ppm bilge alarm being tested shall comply with all the relevant requirements of the technical specificrequirements contained in [5.2].

The test reports shall include the type designation or model identification of the equipment tested, serialnumber, as well as hardware, firmware and software revision information, as applicable, necessary to identifythe equipment under test.

A.2 Test specificationsSection [A.2.1] gives the requirements to the testing arrangements, i.e. to the test facility, test fluids and grabsampling. The requirements in [A.2.1] apply to the performance tests. The technical details for the performancetests are specified in section [A.2.2].

A.2.1 Specifications of testing arrangements

A.2.1.1 Test facility A diagrammatic arrangement of a test facility for evaluating the performance of the 5 ppm bilge alarm is givenin Figure A-1. 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.

A diagram of the test facility used for the performance testing in [A.2.2] is to be submitted. (See [D.3])

Figure A-1Diagram of test facility




A.2.1.2 Sampling arrangementThe sampling arrangement for the test rig should be such that a representative homogeneous sample is obtainedunder all conditions of operation and under all operational proportions of oil content. The sample should beobtained from the full flow through the 5 ppm bilge alarm, but when this is impracticable the samplingarrangements shown in Figure A-2 should be used. Special care should be given to this stage of the process andthe validity of the resultant findings.

A diagram of the sampling arrangement used for the performance testing in [A.2.2] is to be submitted. (See[D.3])

Figure A-2Diagram of sampling arrangement

A.2.1.3 Determination of oil contentThe method for determination of the oil content of the grab samples should be as specified in App.C. Thesamples are to be extracted on the same day of collection, and they are to be sealed and labelled in the presenceof the accredited laboratory or a qualified DNV GL surveyor. Arrangements should be made for analysis assoon as possible, and in any case within seven days, provided the samples are being kept between 2°C and 6°Cat the accredited laboratories.

Form according to [D.1] is to be submitted.

A.2.1.4 The test fluidsTests should be performed using three grades of test fluids prepared in full accordance with MEPC.107(49)Annex Part 1 item 1.2.4. The three test fluids are:

— 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).

— 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).

— 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

Distance A: not greater than 400 mmDistance B: sufficient to insert sampling bottleDimension C: straight length should not be less than 60 mmDimension D: pipe thickness should not be greater than 2 mmDetail E: chisel-edged chamfer (30ºC)




— 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 (Fe3O4) with

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

The following data for the test fluids should be reported:

1) Properties of test fluids A and B: (form filled in according to [D.2])

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

2) Properties of test fluid C: (form filled in according to [D.2])

— 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: (form according to [D.2] is to be filled in)

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

A.2.2 Specification of performance tests

A.2.2.1 Calibration and activation accurancy testThe 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.2.1.4], at the following oil concentrations in partsper million: 0, 2, 4, 6, 9 and 15 ppm and at the full scale of the meter.

The following apply for each concentration test on all test fluids: Each concentration test will last for 15 min.Meter display is noted. It shall be noted if the alarm activates or not. Grab samples shall be taken and sent toanalysis to determine the actual oil content. After each concentration test, the 5 ppm alarm will be run on cleanwater for 15 min and the display reading noted.

If it proves necessary to re-zero or re-calibrate the 5 ppm bilge alarm during this test, this fact will be noted.

Form according to [D.4] is to be filled in. The meter accurancy in ppm is calculated from the difference betweenthe meter display reading and the measured oil content in grab samples. The meter accuracy should beaccording to [5.2] d). The activation accuracy should be according to [5.2] f).

A.2.2.2 Contaminant and colour testThe 5 ppm bilge alarm should undergo contaminant and colour tests as follows:

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

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] f).

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] f); and

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

Form according to [D.5] is to be filled in.




A.2.2.3 Sample pressure or flow testThe 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 (zeroshift or calibration shift) on the 5 ppm bilge alarm ppm display reading should be noted and recorded on thecertificate. This test may require modification for 5 ppm bilge alarms with flow or pressure regulators or 5 ppmbilge alarms designed to discharge into an ambient pressure sump.

Any zero shift and calibration shift should be within the accuracy limits specified in paragraph [5.2] f).


A.2.2.4 Shut off testsThe 5 ppm bilge alarm should be run on clean water before and after the testing. The 5 ppm bilge alarm shouldbe run on 4 ppm test fluid “B” sample. The water and test fluid injection pumps should be shut off. The 5 ppmbilge alarm will be left turned on with no other changes made. After 8 hours, the water and test fluid injectionpump should be turned on and set to provide the mixture of 4 ppm. The 5 ppm bilge alarm ppm display readingsbefore and after each test, and any damage to the 5 ppm alarm should be noted and recorded on the certificate.

Any zero shift and calibration shift should be within the accuracy limits specified in paragraph [5.2] f). Formaccording to [D.7] is to be filled in.

A.2.2.5 Utilities supply variation testIf 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. The 5 ppm bilge alarm should be run on clean water before and after the testing.The 5 ppm bilge alarm should be run on 4 ppm test fluid “B” sample. Any zero shift or calibration shift to the5 ppm bilge alarm ppm display reading should be noted and recorded on the certificate.

Any zero shift and calibration shift should be within the accuracy limits specified in paragraph [5.2] f). Formaccording to [D.8] is to be filled in.

A.2.2.6 Calibration and zero drift testThe 5 ppm bilge alarm should be calibrated and zeroed. The meter display reading on oil-free water is noted.4 ppm test fluid “B” sample should run through the 5 ppm bilge alarm for eight hours and any calibration driftnoted. During the last hour, the alarm must be inclined at an angle of 22.5º with the plane of its normal operatingposition. During this test, grab samples should be taken 0, 2, 4, 6, and 8 hours into the test schedule to verifythe actual oil content and to use for determining the calibration shift and calibration drift. After the test, the 5ppm bilge alarm should run on oil-free water for 15 minutes, and any zero drift should be noted and recordedon the certificate.

Any zero drift and calibration shift/drift should be within the accuracy limits specified in paragraph [5.2] f).Form according to [D.9] is to be filled in.

A.2.2.7 Response-time testThe 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 fluids “A”, “B” and “C”. Between each test fluid, the alarm shouldrun on clean water for 15 minutes. The response-time test is performed in order to verify the compliance with[5.2] e). The response time, i.e. the time from the flow having more than 5 ppm oil concentration to the meterdisplay showing the correct response, is accurately measured and noted.




App.B Specifications for environmental testing –

Appendix BSpecifications for environmental testing

B.1 GeneralThe specifications for environmental testing for type approval relate to the electrical and electronic sections of5 ppm bilge alarmAll electrical and electronic components of the 5 ppm separator shall be tested in accordance with App.B.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 accredited testing laboratory. Theprotocol shall include at least a statement of the tests conducted on the equipment, including the results thereof.The protocol shall be signed and dated by the person in charge of the laboratory. The test report shall include the type designation or model identification of the equipment tested, serial number,as well as hardware, firmware and software revision information, as applicable, necessary to identify theequipment under test.

B.2 Test specifications

B.2.1 Testing requirementsThe 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 society by the manufacturer, together with the application for type approval.

B.2.2 Test specification detailsEquipment should operate satisfactorily on completion of each of the following environmental tests:

B.2.2.1 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 ± 1mmb) 13.2 to 80 Hz with an acceleration of ± 0.7 g. This search should be made in each of the three planes at

a 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 an

acceleration 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 there

should be no significant change in the vibration pattern.

B.2.2.2 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°Cb) 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.2.2.3 Humidity testsEquipment 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.2.2.2], followed by the humidity test.).

B.2.2.4 Inclination testEquipment should operate satisfactorily at angles of inclination up to 22.5° in any plane from the normaloperating position.

B.2.2.5 Reliability of electrical and electronic equipmentThe 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 CMethod for determination of oil content

C.1 Scope and applicationThe 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.



App.D Forms for test data and results –

Appendix DForms for test data and resultsTest data and results of tests conducted on a 5 ppm bilge alarm in accordance with App.A.

D.1 Oil-content analysis

D.2 Test fluids data

D.3 Test rig and sampling arrangement

Manufacturer of 5 ppm bilge alarm

Test location

Date of test

Samples sealed and labelled by

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

Diagram of test rig submitted Yes/No

Diagram of sampling arrangement submitted Yes/No




D.4 Display calibration and activation-accuracy testsTable example is given for test fluid “A”. Identical tables should be made also for test fluids “B” and “C”.

D.5 Contaminant and colour test

Total testing time: _____________ min

Test Fluid “A” Time Expected oil content (ppm)

Meter display reading (ppm)

Measured oil content in

grab sample (ppm)

Meter display

accuracy (ppm)

Activation? (Yes/No)

Clean water

2 ppm

Clean water

4 ppm

Clean water

6 ppm

Clean water

9 ppm

Clean water

15 ppm

Clean water

Full scale of meter

Water temperature [ºC]

Re-zero Yes/No and if yes: when

Re-calibrate Yes/No and if yes: when

Fluid Time Expected oil content (ppm)

Bilge-alarm read-ing [ppm]

Calibration shift (ppm)

Clean water

Clean water and 4 ppm test fluid “B”4 ppm test fluid “B” and iron oxide 4 ppm4 ppm test fluid “B” and iron oxide 50 ppm4 ppm test fluid “B” and iron oxide 100 ppm4 ppm test fluid “B” and clean water4 ppm test fluid “B” and very salt water (6%)




D.6 Sample pressure test

D.7 Shut-off test

D.8 Utilities supply variation test

Fluid Pressure [bar] or flow [l/min]

Expected oil content (ppm)

alarm display reading [ppm]

Zero shift (ppm)


Clean water, normal pressure/flow4 ppm test fluid “B”, half of normal pressure/flow: 4 ppm test fluid “B”, Normal pressure/flow: 4 ppm test fluid “B”, Twice of normal pressure/flowClean water, normal pressure/flowDeviations and other comments:


Alarm display reading (ppm)

Zero shift (ppm) Calibration shift (ppm)

Clean water

4 ppm test fluid “B”, before shut offShut off, minimum 8 hours

4 ppm test fluid “B”, minimum 8 hours after shut off

Clean water

Deviations or damage to bilge alarm:

Utility supply Expected oil content (ppm)

Alarm display reading(ppm)

Zero shift (ppm)


Clean water

110% voltage

90% voltage

110% air pressure

90% air pressure

110% hydraulic pressure

90% hydraulic pressure

Clean water

Deviations and other comments:




D.9 Calibration and zero-drift test

D.10 Response time test


Alarm dis-play reading

[ppm]

Measured oil content (grab

samples) (ppm)


Calibration drift (ppm)

Zero drift (ppm)

Clean water

4 ppm test fluid “B” after 0 hours4 ppm test fluid “B” after 2 hours4 ppm test fluid “B” after 4 hours4 ppm test fluid “B” after 6 hours4 ppm test fluid “B” after 8 hours and 22.5° inclination during the last hour

Clean water

Medium Time Expected oil content (ppm)

Meter display reading (ppm)

Response time [s]

Clean water

Test fluid “A”

Clean water

Test fluid “B”

Clean water

Test fluid “C”


5 ppm bilge alarms - rules and standards - dnv gl for certification - no. 2.9, february 2015 type...

Documents