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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

50th session

Agenda item 4

FP 50/4

12 October 2005

Original: ENGLISH

PERFORMANCE TESTING AND APPROVAL STANDARDS

FOR FIRE SAFETY SYSTEMS

Report of the correspondence group

Submitted by the United States

SUMMARY

Executive summary: This document reports the work of the Correspondence Group on

Performance Testing and Approval Standards for Fire Safety Systems

established at FP 49

Action to be taken: Paragraph 21

Related documents: FP 46/16; FP 47/WP.9; FP 47/16; FP 48/19; FP 49/17; FP 49/WP.2;

FP 49/4; FP 49/4/2; FP 49/4/4 and FP 49 INF.4

INTRODUCTION

1 The Sub-Committee, at its forty-ninth session, established a correspondence group, under

the coordination of the United States, to progress work intersessionally on performance testing

and approval standards for fire safety systems.

2 The following Member Governments participated in the work of the group:

ARGENTINA NETHERLANDSCANADA NORWAY

CHINA POLANDDENMARK REPUBLIC OF KOREAFINLAND ROMANIAGERMANY SWEDENITALY UNITED KINGDOMJAPAN UNITED STATES

and the following non-governmental organizations:

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)

INTERNATIONAL COUNCIL OF CRUISE LINES (ICCL)

3 The group was given the following terms of reference (FP 49/17, paragraph 4.26):

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.1 further consider matters related to water-mist fire-extinguishing systems for

accommodation, service and control spaces, taking into account document

FP 49/4;

.2 consider matters related to fixed high-expansion foam systems using inside air,

taking into account documents FP 49/4/2, FP 49/4/4 and FP 49/INF.4 and makerecommendations as appropriate;

.3 prepare relevant amendments for the following short-term priority category of

topics relating to the following machinery space and cargo pump-room

fire-extinguishing arrangements:

.1 fixed pressure water-spraying systems;

.2 fixed low-expansion foam fire-extinguishing systems; and

.3 portable foam applicator units;

.4 prepare relevant amendments for water-mist fire-extinguishing systems and fixed

pressure water-spraying fire-extinguishing systems for vehicle space, ro-ro space

and special category space extinguishing systems;

.5 consider further matters related to the revision of MSC/Circ.848;

.6 continue consideration of the use of total flooding carbon dioxide

fire-extinguishing systems in normally occupied areas in response to actions taken

by various governmental agencies;

.7 consider matters related to the revision of the proposed functional objectives and

requirements for class III engine-room water-mist fire protection protocol, as set

out in annex 2 to document FP 49/4, and make recommendations as appropriate;

.8 consider matters related to the development of the scientific methods on scaling of

the test volume to a larger shipboard protected volume and make

recommendations as appropriate;

.9 further consider the draft guidelines for inspection and maintenance of fixed

carbon dioxide systems, as set out in annex 3 to document FP 49/WP.2; and

.10 submit a report to FP 50.

MAINTENANCE AND INSPECTIONS OF FIXEDCO2 FIRE-EXTINGUISHING SYSTEMS

4 The group further considered the proposed draft carbon dioxide system inspection

guidance contained in document FP 49/WP.2, annex 3, taking into account comments made by

ICCL and ICS at FP 49 (FP 49/17, paragraphs 4.17 and 4.18). The draft guidelines were

subsequently revised to better define which inspection activities should be conducted by the

ship’s crew and which should be conducted by trained specialists. The majority of the group

previously held the view that carbon dioxide systems on all ships should be inspected by trainedspecialists at least biennially. However, since FP 49 additional members of the group now

support an inspection schedule coincident with the periodic and renewal survey procedures

established by resolution A.948(23). The Sub-Committee is invited to provide further direction

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in regard to recommended inspection intervals for fixed carbon dioxide systems. The revised

draft guidelines are set out in annex 1.

APPROVAL OF EQUIVALENT FIXED-GAS FIRE-EXTINGUISHING SYSTEMS FOR MACHINERY

SPACES AND CARGO PUMP ROOMS (MSC/CIRC.848)

5 As requested by the Sub-Committee (FP 48/19, paragraph 4.19), the group further

considered the proposed safe personnel exposure limits for halocarbon and inert gas

fire-extinguishing agents in paragraph 6 of the annex to MSC/Circ.848. Several members of the

group proposed using the personnel safety standards adopted by the National Fire Protection

Association’s (NFPA) 2001 Technical Committee in the 2004 edition of that standard. Other

members considered that the existing guidelines taken from the 2001 edition of the

NFPA standard should be retained. A draft of proposed paragraph 6 that incorporates

the 2004 guidelines has been developed to more clearly state the allowable exposure limits;

however, due to time constraints, unanimous agreement on the final wording was not reached and

should be further considered at FP 50.

6 The group also discussed the possible storage of halocarbon and inert gas agent

containers within the protected space, noting that IACS had recently approved a unified

interpretation to that effect (FP 48/19, paragraph 4.21). Paragraph 11 of the annex to

MSC/Circ.848 permits this practice if the provisions of regulation II-2/5.3.3 are met. However,

this regulation was deleted by the 2000 SOLAS amendments and is no longer a valid reference.

The group agreed that this practice should continue to be permitted. It was also noted that

MSC/Circ.848 contains references to other 1997 SOLAS amendments regulations. To resolve

these inconsistencies, MSC/Circ.848 was revised with updated references to the appropriate

SOLAS 2000 regulations, and the text of the deleted regulation II-2/5.3.3 was placed directly into

paragraph 11 of the circular.

7 The draft revised MSC/Circ.848 is set out in annex 2 and should be considered for

finalization by the ad hoc working group to be established at FP 50.

APPROVAL OF EQUIVALENT SPRINKLER SYSTEMS(RESOLUTION A.800(19))

8 The Sub-Committee is invited to recall that draft amendments to resolution A.800(19)

had been proposed in annex 6 of document FP 49/4. The working group established at FP 49,

having had a preliminary discussion of the proposed amendments, was unable, due to the time

available, to make substantial progress and agreed that further consideration of this matter should

be given by the intersessional correspondence group. The group has since agreed on the majorityof the revised draft guidelines as set out in annex 3, with a view to finalization at FP 50.

9 The proposed amendments changed a number of the technical requirements in the test

procedure and have added several alternatives in the system design criteria to allow more

flexibility. For example, the standard now permits the use of a battery consisting of water and

nitrogen cylinders in lieu of a pressure tank connected to a pressurized air source as an

emergency back-up, and also accepts the use of diesel engine driven water supply pumps in

addition to electric motor driven pumps.

10 The test procedure has also been amended to more realistically simulate operation of

automatic discharge nozzles during the approval tests. Actual ship installations are normally heldat a low standby pressure until a discharge nozzle operates, at which point the main supply

pumps are started and the system is brought up to full pressure. The configuration and total

length of the discharge piping between the pumps and the nozzles can influence the time

necessary for the arrival of full system pressure at the nozzles. The existing test procedure

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permits the laboratory test nozzles to be arranged to immediately operate at full discharge

pressure. The group was concerned that the use of this arrangement does not replicate actual

installations and could lessen the anticipated factor of safety. To account for this time delay in

system operation, the test procedure has been amended to require the nozzles to either be charged

at the minimum operating pressure throughout the tests, or be initially charged at standby

pressure and then brought up to full discharge pressure 15 seconds after operation of the firstnozzle. Correspondingly, the system design criteria have been amended to require piping

configurations to be limited such that full system pressure will be available at the most remote

nozzle within 60 seconds.

11 Another significant amendment is a revision of the text of paragraph 3.22 of the annex,

regarding the sizing of the water supply pumps, which the group deemed to be unclear. The

paragraph previously indicated that the supply pumps should be sized so as to be capable of

maintaining the required flow to the “hydraulically most demanding area of not less than

280 m2”. On many ships there are storage areas of less than 280 m2 that require higher flow rates

than public areas that exceed 280 m2, due to the higher nozzle flow rate requirements for the

protection of storage areas. The paragraph has been reworded to clearly indicate that the pumpsshould be sized to supply the hydraulically most demanding area on the ship, without

consideration of a minimum deck area. However, the group needs to further consider the

requirements for the fire integrity of the bulkheads and decks that separate the hydraulically most

demanding area from adjacent areas. The final issue remaining is for the group to decide if the

calculation of manually activated atrium systems should be included in the determination of the

water supply requirements. These issues should be further considered at FP 50.

FIXED HIGH EXPANSION FOAM FIRE-EXTINGUISHING SYSTEMS

12 The group further considered the proposals made in FP 49/4/2, FP 49/4/4 and

FP 49/INF.4, as well as comments made by Japan and Republic of Korea at FP 49. A preliminary draft testing and approval standard has been prepared and is included as set out in

annex 4. Due to the time available, the group was unable to finalize this document, and

recommends that the ad hoc working group further consider its technical content at FP 50.

FIXED PRESSURE WATER -SPRAYING FIRE-EXTINGUISHING SYSTEMS

13 SOLAS chapter II-2 refers to the use of fixed pressure water-spraying fire-extinguishing

systems for the protection of machinery spaces of category A and cargo pump-rooms. There is

no performance testing criteria in chapter 7 of the FSS Code for such systems. The

correspondence group considered whether to develop a new test procedure for such systems or toinclude them in an existing test procedure. A majority of the group deemed that the

characteristics of fixed pressure water-spraying nozzles were similar enough to those of water

mist nozzles and could therefore be subjected to the same performance criteria. Several

members, however, felt that water spray nozzles should not be subject to these testing criteria and

that requirements for increased flow rates and provisions for using foam additives would suffice.

A proposed draft amendment to chapter 7 of the FSS Code has been prepared that includes both

of these options. The revised chapter 7 is provided at annex 5 and should be further discussed at

FP 50 to resolve these divergent views.

R EVISION OF CHAPTER 6 OF THE FSS CODE

14 The group was assigned a short term priority item to consider possible improvements in

the criteria for fixed low-expansion foam systems. Such systems were previously considered

under the provisions of regulation II-2/8 as a non-mandatory form of protection to supplement

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required machinery space fire-extinguishing systems. The 2000 SOLAS amendments do not

require or reference low expansion foam systems. In view of the limited application of these

systems, the group considers that the information presently in chapter 6 of the FSS Code is

adequate and that no further actions should be taken in this regard.

R EVISION OF REGULATION 3.2 OF CHAPTER 4 OF THE FSS CODE

15 The group considered possible improvements in the criteria for portable foam applicators,

and agreed that it was not necessary to develop a separate testing standard for these portable

devices. Instead the prescriptive requirements listed in chapter 4 of the FSS Code were amended

to include fundamental engineering design standards. The text of revised chapter 4 is set out in

annex 6.

APPROVAL OF FIXED AEROSOL FIRE-EXTINGUISHING SYSTEMS (MSC/CIRC.1007)

16 The group revised MSC/Circ.1007 to include the correct references to the appropriate

paragraphs of SOLAS 1974, as amended by the 2000 amendments. The personnel exposureguidelines were also harmonized with the proposed new text decided for MSC/Circ.848.

Changes were also proposed to the test protocol to link the agent discharge to a fixed discharge

time rather than relying on the end of agent discharge. Experience with the test procedure has

shown that it is difficult to accurately determine when the end of agent discharge occurs due to

the obscured visibility caused by aerosol agents. The draft revised MSC/Circ.1007 is set out in

annex 7.

FIXED PRESSURE WATER -SPRAYING FIRE-EXTINGUISHING SYSTEMS AND WATER MIST

FIRE-EXTINGUISHING SYSTEMS FOR VEHICLE DECKS, RO-RO SPACES AND SPECIAL CATEGORY

SPACES

17 Preliminary discussion of possible revisions to MSC/Circ.914 and resolution A.123(V)

were held during the intersessional period. The group agreed that MSC/Circ.914 should be

replaced with a revised fire test procedure. The primary concerns with the existing test procedure

center on the lack of test data to substantiate the required fuel package and associated acceptance

criteria. Work was begun on a new test procedure by first attempting to define the design fire

scenarios that should be used to replicate the fire hazard posed by typical cargoes stowed on

vehicle decks. Because of time constraints, the group did not complete the proposed new test

procedure, and recommends that further consideration of the issue should be given by the ad hoc

working group at FP 50. The group also considered whether resolution A.123(V) should be

replaced by a new test procedure or whether the revised MSC/Circ.914 could be developed toaccommodate both water mist fire-extinguishing systems and fixed pressure water-spraying

fire-extinguishing systems. This matter should be further discussed at FP 50.

APPROVAL OF FIXED WATER -BASED LOCAL APPLICATION FIRE-FIGHTING SYSTEMS

(MSC/CIRC.913)

18 Minor revisions are proposed to MSC/Circ.913 to include interpretations from

MSC/Circ.1120 with respect to the definition of “protected areas”, and to clarify the meaning of

detection and suppression sections. The group also noted that a decision taken at FP 49

regarding the fire detection system criteria in paragraph 3.16 (FP 49/WP.2, annex 2) conflicted

with a decision previously taken at FP 48 (FP 48/WP.4, annex 2). This issue should be further discussed at FP 50 to resolve the conflict. The proposed revisions are set out in annex 8.

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FUNCTIONAL OBJECTIVES AND REQUIREMENTS FOR CLASS III ENGINE-ROOM WATER -MIST FIRE

PROTECTION PROTOCOL

19 Preliminary research results related to the proposed functional objectives and

requirements for class III engine-room water-mist fire protection protocol, as set out in annex 2

to document FP 49/4 were presented at FP 49. The data concerned measurement of theefficiency of water spray or water mist systems in large spaces, i.e. spaces where enclosure

effects are not the pre-dominant extinguishment effect. Additional results will be presented

at FP 50 together with plans for the final phase of the research project. It is anticipated that a

suggested test protocol will be available for FP 51, along with preliminary suggestions on scaling

of the test volume to a larger shipboard protected volume.

USE OF TOTAL FLOODING CARBON DIOXIDE FIRE-EXTINGUISHING SYSTEMS IN NORMALLY

OCCUPIED AREAS IN RESPONSE TO ACTIONS TAKEN BY VARIOUS GOVERNMENTAL AGENCIES

20 Since FP 49, several agencies have initiated actions that could affect the use of total

flooding carbon dioxide fire-extinguishing systems for the protection of occupied areas on ships.The U.S. Environmental Protection Agency (EPA) has begun a rulemaking to prohibit the use of

carbon dioxide total flooding fire-extinguishing systems in normally occupied spaces. The

International Organization for Standardization (ISO) has formed a working group to rewrite

ISO Standard 6183, with special emphasis on the advisability of the use of total flooding systems

in normally occupied spaces. The NFPA Technical Committee on Gaseous Fire-Extinguishing

Systems has drafted a committee proposal to prohibit the use of new carbon dioxide total

flooding systems in normally occupied spaces with very limited exceptions. Because of these

ongoing activities, continued consideration of this issue by the Sub-Committee is recommended.

SUMMARY

21 A summary of the working group deliberations thus far is given below:

SHORT-TERM PRIORITY CATEGORIES

Topic Applicable Documents Status

Machinery space and cargo

pump-room extinguishing

systems

Water mist fire-extinguishing

systems (MSC/Circ.668/728)

1. FP 48/WP.4 Rev 1,

annex 1

2. FP 49/WP.2, annex 1

Complete - Issued as MSC/Circ.1165

Fixed local applicationfire-extinguishing systems for

machinery spaces of category A

(MSC/Circ.913)

1. FP 48/WP.4 Rev 1,annex 2

2. FP 49/WP.2

3. FP 50/4, annex 4

Minor additional amendments areincluded in annex 8 to be finalized at

FP 50.

Fixed pressure water-spraying

fire-extinguishing systems

Annex 5 Draft amendments to chapter 7 of the

FSS Code are provided in annex 5 for

finalization at FP 50.

Fixed gas fire-extinguishing

systems (MSC/Circ.848)

1. FP 48/WP.4 Rev 1,

annex 3

2. FP 49/WP.2,

paragraph 19

3. FP 50/4, annexes 1

and 2

Annex 1 contains the revised draft

guidelines for CO2 system inspections

and maintenance. Annex 2 contains

revised MSC/Circ.848. The ad hoc

working group should finalize at this

session.

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SHORT-TERM PRIORITY CATEGORIES (Cont’d)

Topic Applicable Documents Status

Aerosol fixed fire-extinguishing

systems

FP 50/4, annex 7 Minor editorial changes are

recommended as set out in annex 7 to

harmonize with the 2000 SOLAS

amendments, and to facilitate the

conduct of the fire tests.

Fixed high-expansion foam

fire-extinguishing systems using

inside air

FP 50/4, annex 4 A draft performance standard has been

prepared. Further agreement on key

technical issues is needed with

expected finalization at FP 51.

Fixed low-expansion foam


Complete - Because of the limited

application, it is proposed that no

further action is necessary.

Portable foam applicator units FP 50/4, annex 6 Draft amendments to the FSS Code

chapter 4 are proposed in annex 6.

Fire-extinguishing arrangementsin control stations,

accommodation and service

spaces


systems in accommodation and

service spaces

(resolution A.800(19))

FP 50/4, annex 3 Draft complete – The ad hoc working

group should finalize at this session.

Vehicle space, ro-ro space and

special category space

extinguishing systems


systems for vehicle space, ro-ro

space and special category space

extinguishing systems

Work has been started on a new test

procedure for water mist systems.

Fixed pressure water-spraying


The new test procedure for water mist

may be applied to water spray systems.

At this time, the Sub-Committee is invited to consider the above actions, in principle, bearing in

mind that when work is completed, the revised draft protocols will be submitted for approval as a

group, and will in due course be proposed as a single MSC circular for adoption (FP 47/16,

paragraphs 8.18-8.21).

Action requested of the Sub-Committee

22 The Sub-Committee is invited to approve the report in general and, in particular, to:

.1 agree, in principle, with the proposed amendments set out in annexes 1 through 8;

.2 note the divergent views of the group in regard to the inspection intervals for

maintenance and inspections of fixed carbon dioxide systems set out in annex 1

and provide further instruction as appropriate in this regard (paragraph 4 and

annex 1);

.3 agree that the ad hoc working group should further consider the revised guidelines

for the approval of equivalent fixed-gas fire-extinguishing systems, as referred to

in SOLAS 74, for machinery spaces and cargo pump rooms (MSC/Circ.848)

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attached at annex 2 with a view to finalization at this session (paragraphs 5 to 7

and annex 2);

.4 agree that the ad hoc working group should further consider the revised guidelines

for approval of sprinkler systems equivalent to that referred to in SOLAS

regulation II-2/12 (resolution A.800(19)) as set out in annex 3 with a view tofinalization at this session (paragraphs 8 to 11 and annex 3);

.5 agree that the ad hoc working group should further consider the proposed draft

test procedure for high expansion foam systems using inside air as set out in

annex 4 with a view to finalization at FP 51 (paragraph 12 and annex 4);

.6 agree that the ad hoc working group should further consider whether fixed

pressure water-spraying fire-extinguishing systems for the protection of

machinery spaces of category A and cargo pump-rooms should have a separate

performance standard, or should be tested in accordance with MSC/Circ.1165

(paragraph 13);

.7 agree with the decision of the group that the criteria for fixed low expansion foam

systems listed in chapter 6 of the FSS Code are adequate and that no further

actions should be taken in this regard (paragraph 14);

.8 agree that the ad hoc working group should further consider the proposed

revisions to the guidelines for the approval of fixed aerosol fire-extinguishing

systems equivalent to fixed gas fire-extinguishing systems, as referred to in

SOLAS 74, for machinery spaces (MSC/Circ.1007) with a view to finalization at

FP 51 (paragraph 16 and annex 7);

.9 agree that the ad hoc working group should further consider the development of a

test procedure for fixed pressure water-spraying fire-extinguishing systems and

water mist fire-extinguishing systems for vehicle decks, ro-ro spaces and special

category spaces with a view to finalization at FP 51 (paragraph 17);

.10 agree that the ad hoc working group should further consider the proposed

revisions to the guidelines for the approval of fixed water-based local application

fire-fighting systems (MSC/Circ.913) with a view towards finalization at FP 50

(paragraph 18 and annex 8);

.11 note the ongoing research being performed related to the revision of the proposed

functional objectives and requirements for class III engine-room water-mist fire

protection protocol with further results expected at FP 51 (paragraph 19); and

.12 note the actions taken by various governmental agencies concerning the use of

total flooding carbon dioxide fire-extinguishing systems in normally occupied

areas, and agree to continue consideration of this issue (paragraph 20).

***

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ANNEX 1

DRAFT GUIDELINES FOR THE MAINTENANCE AND INSPECTIONS

OF FIXED CARBON DIOXIDE SYSTEMS

1 General

These guidelines provide the minimum recommended level of maintenance and inspections for

fixed carbon dioxide systems on all ships, and are intended to demonstrate that the system is kept

in good working order as specified in SOLAS regulation II-2/14.2.1.2. These guidelines are

intended to supplement the extinguishing system manufacturer’s approved maintenance

instructions. Certain maintenance procedures and inspections may be performed by competent

crewmembers, while others should be performed by persons specially trained in the maintenance

of such systems. The on-board maintenance plan should indicate which parts of the

recommended inspections and maintenance are to be completed by trained personnel.

2 Safety

Whenever carbon dioxide systems are subjected to inspection or maintenance, strict safety

precautions should be followed to prevent the possibility that individuals performing or

witnessing the activities are placed at risk. Prior to performing any work, a safety plan should be

developed to account for all personnel and establish an effective communications system

between the inspection personnel and the on-duty crew. Measures to avoid accidental discharges

such as locking or removing the operating arms from directional valves, or shutting and locking

the system block valve should be taken as the initial procedure for the protection of personnel

performing any maintenance or inspections. All personnel should be notified of the impending

activities before work is begun.

3 Maintenance and inspection plan

Fixed carbon dioxide fire-extinguishing systems should be kept in good working order and

readily available for immediate use. Maintenance and inspections should be carried out in

accordance with the ship’s maintenance plan having due regard to ensuring the reliability of the

system. The on-board maintenance plan should be included in the ship’s safety management

system and should be based on the system manufacturer’s recommendations including:

.1 maintenance and inspection procedures and instructions;

.2 required schedules for periodic maintenance and inspections;

.3 listing of recommended spare parts; and

.4 records of inspections and maintenance, including corrective actions taken to

maintain the system in operable condition.

4 Monthly inspections

4.1 At least every 30 days a general visual inspection should be made of the overall systemcondition for obvious signs of damage, and should include verification that:

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.1 all stop valves are in the closed position;

.2 all releasing controls are in the proper position and readily accessible for

immediate use;

.3 all discharge piping and pneumatic tubing is intact and has not been damaged;

.4 all high pressure cylinders are in place and properly secured; and

.5 the alarm devices are in place and do not appear damaged.

4.2 In addition, on low pressure systems the inspections should verify that:

.1 the pressure gauge is reading in the normal range;

.2 the liquid level indicator is reading within the proper level;

.3 the manually operated storage tank main service valve is secured in the open

position; and

.4 the vapour supply line valve is secured in the open position.

5 Annual inspections

The following minimum level of maintenance and inspections should be carried out in

accordance with the system manufacturer’s instructions and safety precautions:

.1 the boundaries of the protected space should be visually inspected to confirm that

no modifications have been made to the enclosure that have created uncloseable

openings that would render the system ineffective;

.2 all storage containers should be visually inspected for any signs of damage, rust or

loose mounting hardware. Cylinders that are leaking, corroded, dented or bulging

should be hydrostatically retested or replaced;

.3 system piping should be visually inspected to check for damage, loose supportsand corrosion. Nozzles should be inspected to ensure they have not been

obstructed by the storage of spare parts or a new installation of structure or

machinery;

.4 the manifold should be inspected to verify that all flexible discharge hoses and

fittings are properly tightened; and

.5 all entrance doors to the protected space should close properly and should have

warning signs, which indicate that the space is protected by a fixed carbon dioxide

system and that personnel should evacuate immediately if the alarms sound. All

remote releasing controls should be checked for clear operating instructions andindication as to the space served.

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6 Minimum Recommended Maintenance

6.1 At least biennially (intervals of 2 years +/- 3 months) [in passenger ships or at each

intermediate and periodical survey*

in cargo ships], the following maintenance should be carriedout (to assist in carrying out the recommended maintenance, typical service charts are attached at

annex):

.1 all high pressure cylinders and pilot cylinders should be weighed or have their

liquid levels detected by other reliable means to confirm that the available charge

in each is above 90% of the nominal charge. Cylinders containing less than 90%

of the nominal charge should be refilled. The liquid level gauge of low pressure

storage tanks should be checked to verify that the required amount of carbon

dioxide to protect the largest hazard is available;

2. the hydrostatic test date of all storage containers should be checked. High pressure cylinders should be subjected to periodical tests at intervals not

exceeding 10 years. At the 10 year inspection, at least 10% of the total number

provided should be subjected to an internal inspection and hydrostatic test**. If

one or more cylinders fail, a total of 50% of the on-board cylinders should be

tested. If further cylinders fail, all cylinders should be tested. Flexible hoses

should be replaced at the intervals recommended by the manufacturer and not

exceeding every 10 years; and

.3 the discharge piping and nozzles should be tested to verify that they are not

blocked. The test should be performed by isolating the discharge piping from the

system and flowing dry air, nitrogen from test cylinders or suitable means throughthe piping.

6.2 At least biennially (intervals of 2 years +/- 3 months) [in passenger ships or at each

renewal survey* in cargo ships], the following maintenance should be carried out by service

technicians/specialists trained to standards accepted by the Administration:

.1 the system controls should be functionally tested by blanking off or disconnecting

the cylinder bank or storage tank from the manifold and using pressure from test

cylinders to simulate operation of the system. Operation should be simulated

from one or more remote release stations. If the remote release controls areoperated by manual pull cables, they should be checked to verify the cables and

corner pulleys freely move, and do not require an excessive amount of travel to

actuate the system;

.2 all cable components should be cleaned and adjusted as necessary, and the cable

connectors should be properly tightened. If the remote release controls are

operated by pneumatic pressure, the tubing should be checked for leakage, and the

proper charge of the remote releasing station pilot gas cylinders should be

* Refer to “ Revised Survey Guidelines Under the Harmonized System of Survey & Certification (resolution A.948(23))”.

**Refer to “ Periodic inspection and testing of seamless steel gas cylinders (ISO – 6406)”.

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verified. All controls and warning devices should function normally, and the time

delay should prevent the stop valve from opening for the required time period; and

.3 after completion of the work, the system should be returned to service. Allreleasing controls should be verified in the proper position and connected to the

correct control valves. All pressure switch interlocks should be reset and returned

to service. All stop valves should be in the closed position.

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SERVICE CHART

HIGH PRESSURE CO2 SYSTEM

Date: Name of ship/unit: IMO No.: Certificate No.:

Technical Description No. Text Value

1 Manufacturer

2 No. of cylinders

3 Cylinder capacity

4 No. of pilot cylinders

5 Pilot cylinder each of capacity

6 No. of distribution lines7 Oldest cylinder pressure test date

8 Protected space(s)

Description of Inspection/Tests

No

.

Description Carried

out

Not

carried

Not

applic.

Comment

1 Release controls and distribution valves secured

2 Contents in cylinders checked by weighing

3 Contents in cylinders checked by liquid level indicator

4 Contents of pilot cylinders checked5 All cylinder valves visually inspected

6 All cylinder frames and connections checked for

tightness

7 Manifold inspected

8 Manifold tested

9 Main valve and distribution valves inspected

10 Main valve and distribution valves tested

11 Total flooding release system inspected

12 Total flooding release system tested

13 Release stations inspected

14 Warning alarms tested15 Fan stop tested

16 Distribution lines and nozzles inspected

17 Distribution lines and nozzles tested

18 Distribution lines and nozzles blown through

19 Detection system tested

20 Pressure test of servo tubing and discharge lines

21 All doors, hinges and locks inspected

22 All instruction plates on installation inspected

23 System left in operational order. Insp. date tags

attached

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SERVICE CHART

LOW PRESSURE CO2 SYSTEM

Date: Name of ship/unit: IMO No.: Certificate No.:

Technical Description No. Text Value

1 Manufacturer

2 No. of tanks

3 Tanks capacity (tons)

4 No. of pilot cylinders

5 Pilot cylinder each of capacity

6 No. of distribution lines7 Protected space(s)

Description of Inspection/Tests

No

.

Description Carried

out

Not

carried

Not

applic.

Comment

1 Tank main service valve closed and secured

2 Distribution valves verified closed

3 Check correct function of level indicator

4 Contents of CO2 tank checked by tank level indicator

5 Contents of CO2 tank checked by riser tube reading6 Contents of CO2 tank checked by level control valve

7 Contents of pilot cylinders checked

8 Start/stop function of cooling compressors tested

9 All connected electrical alarms and indicators tested

0 Main manifold valve inspected

11 Main manifold valve tested

12 Distribution valves inspected

13 Distribution valves tested

14 Release stations inspected

15 Total flooding release mechanism inspected

16 Total flooding release mechanism tested17 Warning alarms tested

18 Fan stop tested

19 Distribution lines and nozzles inspected

20 Distribution lines and nozzles tested

21 Distribution lines and nozzles blown through

22 All doors, hinges, locks and instruction plates

inspected

23 Detection system tested

24 Tank main service valve reopened and secured open

25 System left in operational order. Insp. date tags

attached

***

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ANNEX 2

PROPOSED AMENDMENTS TO MSC/CIRC.848

REVISED GUIDELINES FOR THE APPROVAL OF EQUIVALENT FIXED GAS

FIRE-EXTINGUISHING SYSTEMS, AS REFERRED TO IN SOLAS 74, FOR MACHINERY SPACES AND CARGO PUMP-ROOMS

General

1 Fixed gas fire-extinguishing systems for use in machinery spaces of category A and cargo

pump-rooms equivalent to fire-extinguishing systems required by SOLAS regulations II-2/10.4

and II-2/10.9 should prove that they have the same reliability which has been identified as

significant for the performance of fixed gas fire-extinguishing systems approved under the

requirements of the FSS Code chapter 5. In addition, the system should be shown by test to have

the capability of extinguishing a variety of fires that can occur in a ship's engine-room.

Principal requirements

2 All requirements of the FSS Code chapter 5, regulation 2.1, except as modified by these

guidelines, should apply.

3 The minimum extinguishing concentration should be determined by a cup burner test

conducted in accordance with ISO Standard 14520-1, 2000, “Gaseous Fire-Extinguishing

Systems –Physical Properties and System Design – Part 1: General Requirements”. The design

concentration should be at least 30% above the minimum extinguishing concentration. These

concentrations should be verified by full-scale testing described in the test procedure, as set out

in the appendix.

4 For systems using halocarbon clean agents, 95% of the design concentration should be

discharged in 10 seconds or less. For inert gas systems, the discharge time should not exceed

120 seconds for 85% of the design concentration.

5 The quantity of extinguishing agent for the protected space should be calculated at the

minimum expected ambient temperature using the design concentration based on the net volume

of the protected space, including the casing.

5.1 The net volume of a protected space is that part of the gross volume of the space which isaccessible to the free extinguishing agent gas.

5.2 When calculating the net volume of a protected space, the net volume should include the

volume of the bilge, the volume of the casing and the volume of free air contained in air receivers

that in the event of a fire is released into the protected space.

5.3 The objects that occupy volume in the protected space should be subtracted from the

gross volume of the space. They include, but are not necessarily limited to:

.1 auxiliary machinery;

.2 boilers;

.3 condensers;

.4 evaporators;

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.5 main engines;

.6 reduction gears;

.7 tanks; and

.8 trunks.

5.4 Subsequent modifications to the protected space that alter the net volume of the space

shall require the quantity of extinguishing agent to be adjusted to meet the requirements of this

paragraph and paragraph 6.

6 [Exposure to extinguishing agents, even at concentrations below an adverse effect level,

should not exceed 5 minutes. Halocarbon agents may be used up to their NOAEL (No Observed

Adverse Effect Level) without additional safety measures. Means should be provided to limit

exposure to no longer than 5 minutes. Unprotected personnel should not enter a space during or

after agent discharge until the protected space has been well ventilated and cleared of residue.

6.1 If a halocarbon agent is to be used above its NOAEL, means should be provided to limit

exposure to no longer than the time specified according to a scientifically accepted PBPK

(physiologically based pharmacokinetic*) model or its equivalent which clearly establishes safe

exposure limits both in terms of extinguishing media concentration and human exposure time.

Halocarbon agents should not be used at a gas concentration above that determined safe for

human exposure for 5 minutes. That concentration should be calculated on the net volume of the

protected space at the maximum expected temperature.

6.2 For inert gas systems, means should be provided to limit exposure to no longer than

5 minutes for inert gas systems designed to concentrations below 43% (corresponding to an

oxygen concentration of 12%, sea level equivalent of oxygen) or to limit exposure to no longer than 3 minutes for inert gas systems designed to concentrations between 43% and 52%

(corresponding to between 12% and 10% oxygen, sea level equivalent of oxygen).

6.3 In no case should a halocarbon agent be used above the LOAEL (Lowest Observed

Adverse Effect Level) nor the ALC (Approximate Lethal Concentration) nor should an inert gas

be used at gas concentrations above 52% calculated on the net volume of the protected space at

the maximum expected ambient temperature, without the use of controls as provided in the

International Code for Fire Safety Systems (FSS Code), chapter 5, regulation 2.2.2, and the agent

storage containers should be located outside the protected spaces in accordance with

regulation II-2/10.4.3 of the Convention.]

7 The system and its components should be suitably designed to withstand ambient

temperature changes, vibration, humidity, shock, impact, clogging, and corrosion normally

encountered in machinery spaces or cargo pump-rooms in ships.

8 The system and its components should be designed and installed in accordance with

international standards acceptable to the Organization1 and manufactured and tested to the

satisfaction of the Administration. As a minimum, the design and installation standards should

cover the following elements:

1 Until international standards are developed, national standards acceptable to the Administration should be used.Available national standards include, e.g., Standards of Australia, the United Kingdom and NFPA 2001.

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.1 safety:

.1 toxicity;

.2 noise, nozzle discharge; and

.3 decomposition products;

.2 storage container design and arrangement:

.1 strength requirements;

.2 maximum/minimum fill density, operating temperature range;

.3 pressure and weight indication;

.4 pressure relief; and

.5 agent identification and lethal requirements;

.3 agent supply, quantity, quality standards;

.4 pipe and fittings:

.1 strength, material, properties, fire resistance; and

.2 cleaning requirements;

.5 valves:

.1 testing requirements;

.2 corrosion resistance; and

.3 elastomer compatibility;

.6 nozzles:

.1 height and area testing requirements; and

.2 corrosion and elevated temperature resistance;

.7 actuation and control systems:

.1 testing requirements; and

.2 backup power requirements;

.8 alarms and indicators:

.1 predischarge alarm, agent discharge alarms as time delays;

.2 abort switches;

.3 supervisory circuit requirements; and

.4 warning signs and audible and visual alarms should be located outside

each entry to the relevant space as appropriate;

.9 agent flow calculation:

.1 approval and testing of design calculation method; and

.2 fitting losses and/or equivalent length;

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.10 enclosure integrity and leakage requirements:

.1 enclosure leakage;

.2 openings; and

.3 mechanical ventilation interlocks;

.11 design concentration requirements, total flooding quantity;

.12 discharge time; and

.13 inspection, maintenance, and testing requirements.

9 The nozzle type, maximum nozzle spacing, maximum height and minimum nozzle

pressure should be within limits tested to provide fire extinction per the proposed test method.

10 Provisions should be made to ensure that escape routes which are exposed to leakage

from the protected space are not rendered hazardous during or after discharge of the agent.

Control stations and other locations that require manning during a fire situation should have

provisions to keep HF and HCl below 5 ppm at that location. The concentrations of other

products should be kept below concentrations considered hazardous for the required duration of

exposure.

11 Agent containers may be stored within a protected space if the containers are distributed

throughout the space and meet the following provisions:

.1 a manually initiated power release, located outside the protected space, should be provided. Duplicate sources of power should be provided for this release and

should be located outside the protected space and be immediately available.

.2 electric power circuits connecting the containers should be monitored for fault

conditions and loss of power. Visual and audible alarms should be provided to

indicate this.

.3 pneumatic, electric or hydraulic power circuits connecting the containers should

be duplicated. The sources of pneumatic or hydraulic pressure should be

monitored for loss of pressure. Visual and audible alarms should be provided toindicate this.

.4 within the protected space, electrical circuits essential for the release of the system

should be fire resistant according to IEC 60331 or other equivalent standards.

Piping systems essential for the release of systems designed to be operated

hydraulically or pneumatically should be of steel or other equivalent heat-resisting

material to the satisfaction of the Administration.

.5 each pressure container should be fitted with an automatic overpressure release

device which, in the event of the container being exposed to the effects of fire and

the system not being operated, will safely vent the contents of the container intothe protected space.

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.6 the arrangement of containers and the electrical circuits and piping essential for

the release of any system should be such that in the event of damage to any one

power release line through fire or explosion in a protected space, i.e., a single fault

concept, at least five sixths of the fire-extinguishing charge required by paragraph 5 of this annex can still be discharged having regard to the requirement

for uniform distribution of medium throughout the space.

.7 the containers should be monitored for decrease in pressure due to leakage and

discharge. Visual and audible alarms in the protected area and on the navigation

bridge or in the space where the fire control equipment is centralized should be

provided to indicate this condition.

12 A minimum agent hold time of 15 minutes should be provided.

13 The release of an extinguishing agent may produce significant over and under pressurization in the protected space. Measures to limit the induced pressures to acceptable

limits should be provided.

14 For all ships, the fire-extinguishing system design manual should address recommended

procedures for the control of products of agent decomposition. The performance of

fire-extinguishing arrangements on passenger ships should not present health hazards from

decomposed extinguishing agents, for example on passenger ships, the decomposition products

should not be discharged in the vicinity of muster (assembly) stations.

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APPENDIX

TEST METHOD FOR FIRE TESTING OF FIXED

GAS FIRE-EXTINGUISHING SYSTEMS

1 Scope

1.1 This test method is intended for evaluating the extinguishing effectiveness of fixed gas

fire-extinguishing systems for the protection of machinery spaces of category A and cargo

pump-rooms.

1.2 Fire-extinguishing systems presently covered in SOLAS regulation II-2/5, as amended,

are excluded.

1.3 The test method covers the minimum requirements for fire-extinguishing.

1.4 This test method is applicable to gases, liquefied gases and mixtures of gases. The test

method is not valid for extinguishing gases mixed with compounds in solid or liquid state at

ambient conditions.

1.5 The test programme has two objectives: (1) establishing the extinguishing effectiveness

of a given agent at its tested concentration, and (2) establishing that the particular agent

distribution system puts the agent into the enclosure in such a way as to fully flood the volume to

achieve an extinguishing concentration at all points.

2 Sampling

The components to be tested should be supplied by the manufacturer together with design and

installation criteria, operational instructions, drawings and technical data sufficient for the

identification of the components.

3 Method of test

3.1 Principle

This test procedure enables the determination of the effectiveness of different gaseous agentextinguishing systems against spray fires, pool fires and class A fires.

3.2 Apparatus

3.2.1 Test room

The tests should be performed in 100 m2 room, with no horizontal dimension less than 8 m, with

a ceiling height of 5 m. The test room should be provided with a closable access door measuring

approximately 4 m2 in area. In addition, closable ventilation hatches measuring at least 6 m2 in

total area should be located in the ceiling.

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3.2.2 Integrity of test enclosure

The test enclosure is to be nominally leak tight when doors and hatches are closed. The integrity

of seals on doors, hatches, and other penetrations (for example, instrumentation access ports)must be verified before each test.

3.2.3 Engine mock-up:

.1 an engine mock-up of size (width x length x height) 1 m x 3 m x 3 m should be

constructed of sheet steel with a nominal thickness of 5 mm. The mock-up should

be fitted with two steel tubes diameter 0.3 m and 3 m length that simulate exhaust

manifolds and a solid steel plate. At the top of the mock-up a 3 m2 tray should be

arranged. See below figures 1, 2 and 3; and

.2 a floor plate system 4 m x 6 m x 0.75 m high shall surround the mock-up.Provision shall be made for placement of the fuel trays, described in table 1, and

located as described in table 2.

3.2.4 Instrumentation

Instrumentation for the continuous measurement and recording of test conditions should be

employed. The following measurements should be made:

.1 temperature at three vertical positions (for example., 1, 2.5, and 4.5 m);

.2 enclosure pressure;

.3 gas sampling and analysis, at mid-room height, for oxygen, carbon dioxide,

carbon monoxide, and relevant halogen acid products, for example,

hydrogen iodide, hydrofluoric acid, hydrochloric acid;

.4 means of determining flame-out indicators;

.5 fuel nozzle pressure in the case of spray fire;

.6 fuel flow rate in the case of spray fires; and

.7 discharge nozzle pressure.

3.2.5 Nozzles

3.2.5.1 For test purposes, nozzles should be located within 1 m of the ceiling.

3.2.5.2 If more than one nozzle is used they should be symmetrically located.

3.2.6 Enclosure temperature

The ambient temperature of the test enclosure at the start of the test should be noted and serve as

the basis for calculating the concentration that the agent would be expected to achieve at that

temperature and with that agent weight applied in the test volume.

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3.3 Test fires and programme

3.3.1 Fire types

The test programme, as described in table 3, should employ test fires as described in table 1.

Table 1

Parameters of Test Fires

Fire Type Fuel Fire Size, MW Remarks

A 76 - 100 mm ID

Can

Heptane 0.0012 to 0.002 Tell tale

B 0.25 m2

Tray Heptane 0.35

C 2 m2

Tray Diesel /Fuel Oil 3

D 4 m2

Tray Diesel /Fuel Oil 6

E Low pressurespray

Heptane0.16 ± 0.01 kg/s

5.8

F Low pressure, lowflow spray

Heptane0.03 ± 0.005 kg/s

1.1

G High pressure

spray

Diesel /Fuel Oil

0.05 ± 0.002 kg/s

1.8

H Wood Crib Spruce or Fir 0.3 See Note 2

I 0.10 m2

tray Heptane 0.14

Notes to table 1:

1 Diesel/fuel oil means light diesel or commercial fuel oil.

2 The wood crib should be substantially the same as described in ISO/TC 21/SC5/WG 8

ISO Draft International Standard, Gaseous fire extinguishing systems, Part 1: General

Requirements. The crib should consist of six, trade size 50 mm x 50 mm by 450 mm long,

kiln dried spruce or fir lumber having a moisture content between 9% and 13%. The

members should be placed in 4 alternate layers at right angles to one another. Members

should be evenly spaced forming a square structure.

Achieve ignition of the crib by burning commercial grade heptane in a square steel tray

0.25 m2 in area. During the pre-burn period the crib should be placed centrally above the

top of the tray a distance of 300 to 600 mm.

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Table 2

Spray fire test parameters

Fire type Low pressure(E) Low pressure,

Low flow(F)

High pressure(G)

Spray nozzle Wide spray angle (120

to 125°)

full cone type

Wide spray angle

(80°)

full cone type

Standard angle(at 6 Bar)

full cone type

Nominal fuel pressure 8 Bar 8.5 Bar 150 Bar

Fuel flow 0.16 + 0.01 kg/s 0.03 + 0.005 kg/s 0.050 + 0.002 kg/s

Fuel temperature 20 + 5°C 20 + 5°C 20 + 5°C

Nominal heat release rate 5.8 + 0.6 MW 1.1 + 0.1 MW 1.8 + 0.2 MW

3.3.2 Test programme

The fire test programme should employ test fires singly or in combination, as outlined in table 3.

Table 3

Test Programme

Test No. Fire Combinations (See Table 1)

1 A: Tell tales, 8 corners. See note 1.

2-a

See Note 2

B: 0.25 m2 heptane tray under engine mock-up

E: Horizontal LP spray directed at 15-25 mm rod 0.5 m awayG: HP diesel/fuel oil spray on top of engine mock-up

Total Fire Load: 7.95 MW

2-b

See Note 2

B: 0.25 m2 heptane tray under mock-upI: 0.10 m2 heptane tray on deck plate located below solid steel obstruction plate


3 C: 2 m2

diesel/fuel oil tray on deck plate located below solid steelobstruction plate

H: Wood crib positioned as in Figure 1F: Low pressure, low flow horizontal spray - concealed - with

impingement on inside of engine mock-up wall


4 D: 4 m2

diesel tray under engine mock-up

Total Fire Load: 6 MW

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Note to table 3:

1 Tell-tale fire cans should be located as follows:

.1 in upper corners of enclosure 150 mm below ceiling and 50 mm from each

wall; and

.2 in corners on floors 50 mm from walls.

2 Test 2-a is for use in evaluating extinguishing systems having discharge times of

10 seconds or less.

3 Test 2-b is for use in evaluating extinguishing systems having discharge times

greater than 10 seconds.

3.3.2.1 All applicable tests of table 3 should be conducted for every new fire extinguishant gas,or mixture of gases.

3.3.2.2 Only Test 1 is required to evaluate new nozzles and related distribution system

equipment (hardware) for systems employing fire extinguishants that have successfully completed

the requirements of 3.3.2.1. Test 1 should be conducted to establish and verify the manufacturer's

minimum nozzle design pressure.

3.4 Extinguishing system

3.4.1 System installation

The extinguishing system should be installed according to the manufacturer's design and

installation instructions. The maximum vertical distance should be limited to 5 m.

3.4.2 Agent

3.4.2.1 Design concentration

The agent design concentration is that concentration (in volume per cent) required by the system

designer for the fire protection application.

3.4.2.2 Test concentration

The concentration of agent to be used in the fire extinguishing tests should be the design

concentration specified by the extinguishing system manufacturer, except for test 1 which should

be conducted at 77% of the manufacturer’s recommended design concentration but in no case at

less than the cup burner extinguishing concentration.

3.4.2.3 Quantity of agent

The quantity of agent to be used should be determined as follows:

3.4.2.3.1 Halogenated agents

W = (V/S) C/(100 - C)

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where:

W = agent mass, kg

V = volume of test enclosure, m3

S = agent vapour specific volume at temperature and pressure of the test

enclosure, kg/m3

C = gaseous agent concentration, volume per cent.

3.4.2.3.2 Inert gas agents

Q = V [294/(273 + T)] (P/1.013) ln[100/(100 - C)]

where:

Q = volume of inert gas, measured at 294 K and 1.013 bar, discharged, m3

V = volume of test enclosure, m3 T = test enclosure temperature, Celsius

P = test enclosure pressure, bar

C = gaseous agent concentration, volume per cent.

3.5 Procedure

3.5.1 Fuel levels in trays

The trays used in the test should be filled with at least 30 mm fuel on a water base. Freeboard

should be 150 ± 10 mm.

3.5.2 Fuel flow and pressure measurements

For spray fires, the fuel flow and pressure should be measured before and during each test.

3.5.3 Ventilation

3.5.3.1 Pre-burn period

During the pre-burn period the test enclosure should be well ventilated. The oxygen

concentration, as measured at mid-room height, shall not be less than 20 volume per cent at thetime of system discharge.

3.5.3.2 End of pre-burn period

Doors, ceiling hatches, and other ventilation openings should be closed at the end of the pre-burn

period.

3.5.4 Duration of test

3.5.4.1 Pre-burn time

Fires should be ignited such that the following burning times occur before the start of agent

discharge:

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.1 sprays - 5 to 15 seconds;

.2 trays - 2 minutes; and

.3 crib - 6 minutes.

3.5.4.2 Discharge time:

.1 halogenated agents should be discharged at a rate sufficient to achieve delivery

of 95% of the minimum design quantity in 10 s or less; and

.2 inert gas agents should be discharged at a rate sufficient to achieve 85% of the

minimum design quantity in 120 s or less.

3.5.4.3 Soak time

After the end of agent discharge the test enclosure should be kept closed for 15 minutes.

3.5.5 Measurements and observations

3.5.5.1 Before test:

.1 temperature of test enclosure, fuel and engine mock-up;

.2 initial weights of agent containers;

.3 verification of integrity agent distribution system and nozzles; and

.4 initial weight of wood crib.

3.5.5.2 During test:

.1 start of the ignition procedure;

.2 start of the test (ignition);

.3 time when ventilating openings are closed;

.4 time when the extinguishing system is activated;

.5 time from end of agent discharge;

.6 time when the fuel flow for the spray fire is shut off;

.7 time when all fires are extinguished;

.8 time of re-ignition, if any, during soak period;

.9 time at end of soak period; and.10 at the start of test initiate continuous monitoring as per 3.2.4.

3.5.6 Tolerances

Unless otherwise stated, the following tolerances should apply:

.1 length ±2% of value;

.2 volume ±5% of value;

.3 pressure ±3% of value;

.4 temperature ±5% of value;

.5 concentration ±5% of value.

These tolerances are in accordance with ISO Standard 6182/1, February 1994 edition [4].

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4 Classification criteria

4.1 Class B fires must be extinguished within 30 seconds of the end of agent discharge. At the

end of the soak period there should be no re-ignition upon opening the enclosure.

4.2 The fuel spray should be shut off 15 seconds after extinguishment. At the end of the soak

time, the fuel spray should be restarted for 15 seconds prior to reopening the door and there

should be no re-ignition.

4.3 At the end of the test fuel trays must contain sufficient fuel to cover the bottom of the tray.

4.4 Wood crib weight loss must be no more than 60%.

5 Test report

The test report should include the following information:

.1 name and address of the test laboratory;

.2 date and identification number of the test report;

.3 name and address of client;

.4 purpose of the test;

.5 method of sampling system components;

.6 name and address of manufacturer or supplier of the product;

.7 name or other identification marks of the product;

.8 description of the tested product:

.1 drawings;

.2 descriptions;

.3 assembly instructions;

.4 specification of included materials; and

.5 detailed drawing of test set-up;

.9 date of supply of the product;

.10 date of test;

.11 test method;

.12 drawing of each test configuration;

.13 identification of the test equipment and used instruments;

.14 conclusions;

.15 deviations from the test method, if any;

.16 test results including measurements and observations during and after the test; and

.17 date and signature.

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***

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ANNEX 3

PROPOSED AMENDMENTS TO REVISED GUIDELINES FOR APPROVAL OF

SPRINKLER SYSTEMS EQUIVALENT TO THAT REFERRED TO IN

SOLAS REGULATION II-2/12

Resolution A.800(19)

3 Principle requirements for the system

Revise paragraph 3.3 as follows:

“3.3 The sprinkler system should be capable of continuously supplying the water-based

extinguishing medium for a minimum of 30 minutes. A pressure tank or other means

should be provided to meet the functional requirement stipulated in FSS Code, chapter 8,

regulation 2.3.2.1. The design of the system should ensure that full system pressure isavailable at the most remote nozzle in each section within 60 seconds of system

activation.”


“3.8 There shall be not less than two sources of power for the system. Where the

sources of power for the pump are electrical, these shall be a main generator and an

emergency source of power. One supply for the pump shall be taken from the main

switchboard, and one from the emergency switchboard by separate feeders reserved solely

for that purpose. The feeders shall be so arranged as to avoid galleys, machinery spaces

and other enclosed spaces of high fire risk except in so far as it is necessary to reach theappropriate switchboards, and shall be run to an automatic changeover switch situated near

the sprinkler pump. This switch shall permit the supply of power from the main

switchboard so long as a supply is available there from, and be so designed that upon

failure of that supply it will automatically change over to the supply from the emergency

switchboard. The switches on the main switchboard and the emergency switchboard shall

be clearly labelled and normally kept closed. No other switch shall be permitted in the

feeders concerned. One of the sources of power supply for the alarm and detection system

shall be an emergency source. Where one of the sources of power for the pump is an

internal combustion engine it shall, in addition to complying with the provisions of

FSS Code, paragraph 2.4.3.1, be so situated that a fire in any protected space will notaffect the air supply to the machinery. Pump sets consisting of two diesel engines each

supplying at least 50% of the required water capacity are considered acceptable if the fuel

supply is adequate to operate the pumps at full capacity for a period of 36 hours on

passenger ships and 18 hours on cargo ships.”

Add to paragraph 3.9:

“The capacity of the redundant means should be sufficient to compensate for the loss of

any single supply pump or alternative source. Failure of any one component in the power

and control system should not result in a reduction of the automatic release capability or

reduction of sprinkler pump capacity by more than 50%.”

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“3.13 Each section of sprinklers should be capable of being isolated by one stop valve

only. The stop-valve in each section should be readily accessible in a location outside of the associated section or in cabinets within stairway enclosures. The valve’s location

should be clearly and permanently indicated. Means should be provided to prevent the

operation of the stop-valves by any unauthorized person. Isolation valves used for service,

maintenance or for refilling of antifreeze solutions may be installed in the sprinkler piping

in addition to the section stop valves, if provided with a means for giving a visual and

audible alarm as required by paragraph 3.17. Valves on the pump unit may be accepted

without such alarms if they are locked in the correct position.”


“3.15 The sprinkler system water supply components should be outside category Amachinery spaces and should not be situated in any space required to be protected by the

sprinkler system.”

Add to the end of paragraph 3.19

“The maintenance instructions should include provisions for a flow test of each section at

least annually to check for possible clogging or deterioration in the discharge piping.”

Modify paragraph 3.22 as follows:

“3.22 Pumps and alternative supply components should be capable of supplying the flowrate and pressure needed for the space with the greatest hydraulic demand. For the

purposes of this calculation, the design area used to calculate the required flow and

pressure should be the deck area of the most hydraulically demanding space, separated

from adjacent spaces by A-class [B-class] divisions, up to a maximum of 280 m2. The

quantity of water needed for the atrium deluge system, if provided should [should not] be

included in the calculation. For application to a small ship, the Administration may

specify the appropriate area for sizing of pumps and alternate supply components.”

Add a new paragraph 3.23 as follows:

“3.23 The nozzle location, type of nozzle, and nozzle characteristics should be within the

tested limits determined by the fire test procedures in appendix 2 to provide fire control or

suppression as referred to in paragraph 3.2.”


“3.24 For atria, theatres, restaurants and similar public spaces with ceiling heights greater

than 5 m, a manually activated deluge system should be installed at the ceiling using open

nozzles equivalent to those tested to the requirements of section 6 of annex 2, at a 5 m

ceiling height. The deluge system should be divided into sections not exceeding 280 m2.

The manually operated section valves should comply with the criteria in paragraph 3.13,and the criteria for visual and audible alarms in paragraph 3.17. All enclosed spaces and

any spaces beneath balconies or overhangs within the space should have automatic ceiling

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mounted nozzles. Spacing of nozzles within the atrium should be in accordance with the

public space test requirements.”


(Note – this addition is pending the final outcome of the Passenger Ship Working Group’s

deliberations)

“3.25 The system should be designed in such a way that during a fire occurrence, the

level of protection provided to those spaces unaffected by fire is not reduced.”


“3.26 A quantity of spare water mist nozzles shall be carried for all types and ratings

installed on the ship as follows:

Total number of nozzles Required number of spares

< 300 6

300 to 1000 12

> 1000 24

The number of spare nozzles of any type need not exceed the total number of nozzles

installed of that type.”


“3.27 Any parts of the system which may be subjected to freezing temperatures in

service should be suitably protected against freezing.”

Add a new paragraph 5.21.4 to appendix 1:

“5.21.4 Alternative supply arrangements to the apparatus shown in figure 3 may be used

where damage to the pump is possible. Restrictions to piping defined by note 2 of table 5

should apply to such systems.”

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APPENDIX 2

FIRE TEST PROCEDURES FOR WATER MIST SYSTEMS IN ACCOMMODATION,

PUBLIC SPACES AND SERVICE AREAS ON PASSENGER SHIPS

1 Scope

1.1 These test procedures describe a fire test method for evaluating the effectiveness of water

mist systems equivalent to systems covered by chapter 8 of the FSS Code in accommodation and

service areas on board ships. It should be noted that the test method is limited to the systems’

effectiveness against fire and is not intended for testing of the quality and design parameters of

the individual components of the system.

1.2 In order to fulfil the requirements of paragraph 3.5 of the guidelines, the system must be

capable of fire control or suppression in a wide variety of fire loading, fuel arrangement, room

geometry and ventilation conditions.

1.3 Products employing materials or having forms of construction differing from the

requirements contained herein may be examined and tested in accordance with the intent of the

requirements and, if found to be substantially equivalent, may be judged to comply with the

document.

1.4 Products complying with the text of this document will not necessarily be judged to

comply, if, when examined and tested, they are found to have other features which impair thelevel of safety contemplated by this document.

2 Hazard and occupancy classification

For the purposes of identifying the different fire risk classifications, table 1 is given, which

correlates the fire tests with the classification of occupancy defined in SOLAS regulations

II-2/9.2.2.3 and II-2/9.2.2.4:

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Table 1 – Correlation between fire tests with the classification of

of occupancy defined in SOLAS regulations II-2/9.2.2.3

and II-2/9.2.2.4

Corresponding fire test

Occupancy classification Section

5

cabin

Section

5

corridor

Section

6

public

spaces

Section

8

storage

(1) Control stations X

(2) Stairways X1

(3) Corridors X1

(6) Accommodation spaces of minor fire risk X2 X3

(7) Accommodation spaces of moderate fire risk X2

X3, 4

(8) Accommodation spaces of greater fire risk X3, 4

(9) Sanitary & similar spaces X2 X 3

(11) Refrigerated chambers X

(12) Main galleys and annexes X

(13) Store rooms, workshops, pantries, etc. X

(14) Other spaces in which flammable liquids are

stowed

X

Notes:

1 For corridors and stairways wider than 1.5 m, use section 6 public space fire test instead of the corridor fire test

2 For spaces up to the area of the cabin applied in tests of section 5

3 For spaces over the area of the cabin applied in tests of section 5

4 Refer to annex, item 3.24

3 Definitions

3.1 Fire suppression: sharply reducing the heat release rate of a fire and preventing itsre-growth by means of a direct and sufficient application of water through the fire plume to the

burning fuel surface.

3.2 Fire control: limiting the size of a fire by distribution of water so as to decrease the heat

release rate and pre-wet adjacent combustibles, while controlling ceiling gas temperatures to

avoid structural damage.

3.3 Fire source: fire source is defined as the combustible material in which the fire is set and

the combustible material covering walls and ceiling.

3.4 Igniter: the device used to ignite the fire source.

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4 General requirements

4.1 Nozzle positioning

These test procedures are applicable to either overhead nozzles installed on the ceiling, or

sidewall nozzles installed on bulkheads below the ceiling. Separate approval tests should be

conducted for each nozzle type. The testing organization should be responsible for assuring that

the nozzles for each fire test are installed in accordance with the manufacturer’s design and

installation instructions. The tests should be performed at the maximum specified spacings,

installation height and distances below the ceiling. In addition, if the testing organization finds it

necessary, selected fire tests should also be conducted at minimum specified spacings,

installation height and distances below the ceiling. Where two types of nozzles are installed in

the same area, an overlap of the different nozzle spray patterns should be provided equal to at

least one half of the maximum approved nozzle spacing.

4.2 Water pressure and flow rates

The testing organization should be responsible for assuring that all fire tests are conducted at the

operating pressure and flow rates specified by the manufacturer.

For all tests, the system should either be:

.1 pressurised to the minimum operating pressure specified by the manufacturer.

Upon activation of the first nozzle, the flowing water pressure should be

maintained at the minimum system operating pressure; or

.2 pressurised to the minimum stand-by pressure specified by the manufacturer.

Upon activation of the first nozzle, the flowing water pressure should be gradually

increased to the minimum system operating pressure, specified by the

manufacturer. The delay time until the minimum system operating pressure is

reached should be at least 15 seconds. The delay time recorded during the tests

should be documented and included in the approval of the system.

4.3 Temperature measurements

Temperatures should be measured as described in detail under each chapter. Chromelalumelthermocouple wires not exceeding 0.5 mm in diameter welded together should be used. The

temperatures should be measured continuously, at least every two seconds, throughout the tests.

4.4 Environmental conditions

The test hall should have an ambient temperature of between 10ºC and 30ºC at the start of each

test.

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4.5 Tolerances


.1 Length ± 2 % of value

.2 Volume ± 5 % of value

.3 Pressure ± 3 % of value

.4 Temperature ± 5 % of value

These tolerances are in accordance with ISO Standard 6182-1. February 1994 edition.

4.6 Observations

The following observations should be made during and after each test:

.1 time of ignition;

.2 activation time of each nozzle;

.3 time when water flow is shut off;

.4 damage to the fire source;

.5 temperature recordings;

.6 system flow rate and pressure; and

.7 total number of operating nozzles.

4.7 Fire sources

If the requirements for fire sources specified in the following sections of this test method cannot

be fulfilled, it is the responsibility of the test laboratory to show that alternative materials usedhave burning characteristics similar to those of specified materials.

4.8 Product and documentation requirements

The fire test report should identify the critical parameters to be incorporated into the design,

installation and operating instruction manual.

The instruction manual should reference the limitations of each device and should include at least

the following items:

.1 description and operating details of each device and all accessory equipment,including identification of extinguishing system components or accessory

equipment by part or model number;

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.2 nozzle design recommendation and limitations for each fire type;

.3 type and pressure rating of pipe, tubing and fittings to be used;

.4 equivalent length values of all fittings and all system components through which

water flows;

.5 discharge nozzle limitations, including maximum dimensional and area coverage,

minimum mad maximum installation height limitations, and nozzle permitted

location in the protected volume;

.6 range of filling capacities for each size storage container;

.7 details for the proper installation of each device, including all component

equipment;

.8 reference to the specific types of detection and control panels (if applicable) to be

connected to the equipment;

.9 operating pressure ranges of the system;

.10 method of sizing pipe or tubing;

.11 recommended orientation of tee fittings and the splitting of flows through tees;

and

.12 maximum difference in operating (flowing) pressure between the hydraulically

closest and most remote nozzle.

5 Cabin and corridor tests

5.1 Test arrangement

5.1.1 The fire tests should be conducted in a 3 m x 4 m, 2.5 m high cabin connected to the

centre of a 1.5 m x 12 m long corridor, 2.5 m high with both ends open. The cabin area may be

increased up to the maximum size to be protected with one nozzle. The disabled nozzle testshould be conducted in a 3 m x 4 m cabin.

5.1.2 The cabin should be fitted with one doorway opening, 0.8 m wide and 2.2 m high, which

provides for a 0.2 m lintel above the opening

5.1.3 The walls of the cabin should be constructed from an inner layer of nominally 12 mm

thick non-combustible wall board with a nominally 45 mm thick mineral wool liner. The walls

and ceiling of the corridor and ceiling of the cabin should be constructed of nominally 12 mm

thick non-combustible wall boards. The cabin may be provided with a window in the wall

opposite the corridor for observation purposes during the fire tests.

5.1.4 The cabin and corridor ceiling should be covered with cellulosic acoustical panels. The

acoustical panels should be nominally 12 mm to 15 mm thick and should not ignite when tested

in accordance with IMO resolution A.653(16).

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5.1.5 Plywood panels should be placed on the cabin and corridor walls. The panels should be

approximately 3 mm thick. The ignition time of the panel should be not more than 35 seconds

and the flame spread time at 350 mm position should not be more than 100 seconds as measured


5.2 Instrumentation

During each fire test, the following temperatures should be measured using thermocouples of

diameter not exceeding 0.5 mm:

.1 the ceiling surface temperature above the ignition source in the cabin should be

measured with a thermocouple embedded in the ceiling material from above such

that the thermocouple bead is flush with the ceiling;

.2 the ceiling gas temperature should be measured with a thermocouple 75+1 mm below the ceiling in the centre of the cabin;

.3 the ceiling surface temperature in the centre of the corridor, directly opposite the

cabin doorway, should be measured with a thermocouple embedded in the ceiling

material such that the thermocouple bead is flush with the ceiling (figure 1); and

.4 the ceiling surface temperature directly above the corridor test fire source (if used)

described in paragraph 5.4.2 should be measured with a thermocouple embedded

in the ceiling material such that the thermocouple bead is flush with the ceiling

surface.


The nozzles should be installed to protect the cabin and corridor in accordance with the

manufacturer’s design and installation instructions subject to the following:

.1 if only one ceiling nozzle is installed in the cabin, it may not be placed in the

shaded area in figure 2;

.2 if two or more ceiling nozzles are installed in the cabin the nominal water flux

density should be homogeneously distributed throughout the cabin;

.3 corridor nozzles should not be placed closer to the centreline of the cabin doorway

than one half the maximum spacing recommended by the manufacturer. An

exception is systems where nozzles are required to be placed outside each

doorway; and

.4 cabin mounted sidewall nozzles should be installed on the centreline of the front

wall of the cabin adjacent to the doorway, aimed towards the rear of the cabin.

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5.4 Fire sources

5.4.1 Cabin test fire source

Two pullman-type bunk beds having an upper and lower berth should be installed along the

opposite side walls of the cabin (figure 1). Each bunk bed should be fitted with 2.0 m by 0.8 m

by 0.1 m polyether mattresses having a cotton fabric cover. Pillows measuring 0.5 m by 0.8 m

by 0.1 m should be cut from the mattresses. The cut edge should be positioned towards the

doorway. A third mattress should form a backrest for the lower bunk bed. The backrest should

be attached in an upright position in a way that prevents it from falling over (figure 3).

The mattresses should be made of non-fire retardant polyether and they should have a density of

approximately 33 kg/m3. the cotton fabric should not be fire retardant treated and it should have

an area weight of 140 g/m2 to 180 g/m2. when tested according to ISO Standard 5660-1

(astm e-1354), the polyether foam should give results as given in the table below. the frame of the bunk beds should be of steel nominally 2 mm thick.

ISO STANDARD 5660, CONE CALORIMETER TEST

Test Conditions: Irradiance 35 kW/m2. Horizontal position.

Sample thickness 50 mm. No frame retainer should be used

Test results Foam

Time to ignition (s) 2-63 minute average HRR, q180 (kW/m2) 270650

Minimum heat of combustion (MJ/kg) 27

Total heat release (MJ/m2) 50612

5.4.1 Corridor test fire source

The corridor fire tests should be conducted using eight piled polyether mattress pieces measuring

0.4 m x 0.4 m x 0.1 m, as specified in paragraph 5.4.1, without fabric covers. The pile should be

placed on a stand, 0.25 m high, and in a steel test basket to prevent the pile from falling over

(figure 4).

5.5 Test method

The following series of fire tests should be performed with automatic activation of the nozzle(s)

installed in the cabin and/or corridor as indicated. Each fire should be ignited using an igniter

made of some porous material, e.g. pieces of insulating fibreboard. The igniter may be either

square or cylindrical, 60 mm square or 75 mm in diameter. The length should be 75 mm. Prior

to the test the igniter should be soaked in 120 ml of heptane and positioned as indicated for each

cabin fire test. For the corridor fire tests, the igniter should be located in the centre at the base of

the pile of the mattress pieces, and on one side of the test stand at the base of the pile of mattress

pieces:

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.1 lower bunk bed test. Fire arranged in one lower bunk bed and ignited with the

igniter located at the front (towards door) centreline of the pillow;

.2 upper bunk bed test. Fire arranged in one upper bunk bed with the igniter locatedat the front (towards door) centreline of the pillow;

.3 arsonist test;

.4 disabled nozzle test. The nozzle(s) in the cabin should be disabled. Fire arranged

in one lower bunk bed and ignited with the igniter located at the front (towards

door) centreline of the pillow. If nozzle(s) in the cabin are linked with nozzle(s)

in the corridor such that a malfunction would affect them all, all cabin and

corridor nozzles linked should be disabled;

.5 corridor test. Fire source located against the wall of the corridor under onenozzle; and

.6 corridor test. Fire source located against the wall of the corridor between two

nozzles;

the fire tests should be conducted for 10 minutes after the activation of the first nozzle, and any

remaining fire should be extinguished manually.

5.6 Acceptance criteria

Based on the measurements, a maximum 30 seconds average value should be calculated for eachmeasuring point which forms the temperature acceptance criteria.

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Acceptance criteria for the cabin and corridor tests

Maximumacceptable

damage on

mattresses (%)

Maximum30 s

average

ceiling

surface

temperature

in the cabin

(ºC)

Maximum30 s

average

ceiling

gas

temperature

in the cabin

(ºC)

Maximum30 s

average

ceiling

surface

temperature

in the

corridor

(ºC)

Lower

bunk

Upper

bunk

Other criteria

Lower

bunk

bed

40 10

Upper

bunk bed

360 320 120

N.A. 40

No nozzlesin corridor allowed tooperate3

Cabin

tests

Arsonist N.A. N.A. 120 N.A. N.A. N.A.

Corridor

tests

N.A. N.A. 1201 N.A. Only twoIndependent and

adjacent

nozzles incorridor

allowed tooperate4

Disabled nozzle N.A. N.A. 4002 N.A. N.A.

1 In each test, the temperature should be measured above the fire source.

2 The fire is not allowed to propagate along the corridor beyond the nozzles closest to the door

opening.

3 Not applicable, if cabin nozzle(s) are linked to corridor nozzle(s).

4 Not applicable, if corridor nozzle(s) are linked together.

N.A. Not applicable

Note: After the test, the fire sources should be examined visually to determine compliance with

the required maximum damage. The damages should be estimated using the following formula:

Damage to lower bunk bed = (damage to horizontal mattress (%) + 0.25 x damage to

pillow (%) + damage to backrest (%))/2.25

Damage to upper bunk bed = (damage to horizontal mattress (%) + 0.25 x damage to

pillow (%))/1.25

If it is not clearly obvious by visual examination whether the criteria are fulfilled or not,

the test should be repeated.

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6 Public space fire tests

6.1 Test arrangements

The fire tests should be conducted in a well-vented building under a ceiling of at least 80 m2 in

area with no dimension less than 8 m. There should be at least a 1 m space between the

perimeters of the ceiling and any wall of the test building. The ceiling height should be set

at 2.5 m and 5.0 m respectively.

Two different tests should be conducted as per paragraphs 6.1.1 and 6.1.2.

6.1.1 Open public space test

The fire source should be positioned under the centre of the open ceiling so that there is an

unobstructed flow of gases across the ceiling. The ceiling should be constructed from anon-combustible material. At least 1 m2 of the ceiling just above ignition should be covered with

acoustical panels. The acoustical panels should be nominally 12 mm to 15 mm thick, and should

not ignite when tested in accordance with IMO resolution A.653(16).

6.1.2 Corner public space test

The test should be conducted in a corner constructed by two at least 3.6 m wide, nominally

12 mm thick, non-combustible wall boards.

Plywood panels should be placed on the walls. The panels should be approximately 3 mm thick.

The ignition time of the panel should not be more than 35 seconds and the flame spread timeat 350 mm position should not be more than 100 seconds measured in accordance with

IMO resolution A.653(16).

The ceiling should be covered, 3.6 m out from the corner, with cellulosic acoustical panels. The

acoustical panels should be nominally 12 mm to 15 mm thick, and should not ignite when tested


6.2 Instrumentation

During each fire test, the following temperatures should be measured using thermocouples withdiameter not exceeding 0.5 mm.

6.2.1 Open public space test

.1 the ceiling surface temperature above the ignition source should be measured

using a thermocouple embedded in the ceiling material such that the thermocouple

bead is flush with the ceiling surface; and

.2 The ceiling gas temperature should be measured using a thermocouple located

75+1 mm below the ceiling 1.8 m from ignition.

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.1 The ceiling surface temperature above the ignition source should be measured

using a thermocouple embedded in the ceiling material such that the thermocouple bead is flush with the ceiling surface.

.2 The ceiling gas temperature should be measured using a thermocouple located

75+1 mm below the ceiling within 0.2 m horizontally from the closest nozzle to

the corner.


For nozzles with frame arms, tests should be conducted with the frame arms positioned both

perpendicular and parallel with the edges of the ceiling or corner walls. For nozzles without

framed arms, the nozzles should be oriented so that the lightest discharge density will be directedtowards the fire area.

6.4 Fire sources

6.4.1 Open public space

The fire source should consist of four sofas made of mattresses as specified in item 5.4.1 installed

in steel frame sofas. The steel frames for the sofas should consist of rectangular bottom and

backrest frames constructed of steel angles, channels or rectangular stock of at least 3 mm

thickness. The frame dimensions should be 2.0 m x 0.65 m. The seat and backrest cushions

should be supported on each frame by three steel bars 20-30 mm wide x 0.65 m long spacedevery 0.5 m and welded to the frames. Steel plates should not be used to support the cushions.

The assembled frames should be supported by four legs constructed of similar steel stock. The

two rear legs should be 500 mm in height and the front legs should be 580 mm in height. Each

sofa should have a rectangular armrest on each end. The armrest should be constructed of similar

steel stock and should be 0.2 m in height and 0.5 m in length. The rear section of the armrest

should be attached to the bottom frame 50 mm from the backrest. The sofas should be positioned

as shown in figure 7 spaced 25 mm apart. One of the middle sofas should be ignited, centric and

at the bottom of the backrest, with an igniter as described in item 5.5.


The fire source should consist of a sofa, as specified in 6.4.1, placed with the backrest 25 mm

from the right-hand wall and close up to the left-hand wall. A target sofa should be placed along

the right-hand wall with the seat cushion 0.1 m from the first sofa and another target sofa should

be placed 0.5 m from it on the left hand side. The sofa should be ignited using an igniter, as

described in 5.5, that should be placed at the far left of the corner sofa, at the base of the backrest,

near the left-hand wall (figure 8).

6.5 Test method

The fire tests should be conducted for 10 minutes after the activation of the first nozzle, and anyremaining fire should be extinguished manually.

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6.5.1 Open public space tests

Fire tests should be conducted with the ignition centred under one, between two and below four

nozzles. An additional test should be conducted with the ignition centred under a disablednozzle.


The fire tests should be conducted with at least four nozzles arranged in a 2 x 2 matrix.


Based on the measurements, a maximum 30 seconds average value should be calculated for each

measuring point which forms the temperature acceptance criteria.

6.6.1 Acceptance criteria for the public space tests

Maximum 30 s

average ceiling

surface temperature

(ºC)

Maximum 30 s

average ceiling

gas temperature

(ºC)

Maximum acceptable

Damage on mattresses

(%)

normal 360 2202

50/351

Open space

disabled

nozzle

N.A. N.A. 50 (target sofas)[70]

Corner360 220

50/35

1

(ignition sofa)no charring of target

sofas

1 50% is the upper limit for any single test. 35% is the upper limit for the average of the public

space tests required in 6 at each ceiling height (excluding the disabled sprinkler test).

2 The gas temperature should be measured at four different positions and the evaluation of the

results is based on the highest reading.

N.A. Not applicable.

7 Storage area fire tests

7.1 Test arrangements

As per 6.1 but with 2.5 m ceiling height only.

7.2 Instrumentation

No temperature measurements are required.

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As per 6.3.

7.4 Fire source

The fire source should consist of two central, 1.5 m high, solid piled stacks of cardboard boxes

packed with polystyrene unexpanded plastic cups with a 0.3 m flue space. Each stack should be

approximately 1.6 m long and 1.1 m to 1.2 m wide.

A suitable plastic commodity is the FMRC standard plastic commodity [9]. Similar commodities

might be used if they are designed in a similar way and are proven to have the same burning

characteristics and suppressability.

The fire source should be surrounded by six 1.5 m high solid piled stacks of empty cardboard boxes forming a target array to determine if the fire will jump the aisle. The boxes should be

attached to each other, for example by staples, to prevent them from falling over (figure 9).

7.5 Test method

Fire tests should be conducted with the ignition centred under one, between two and below four

nozzles.

Each fire should be ignited using two igniters as described in 5.5. The igniters should be placed

on the floor, each against the base of one of the two central stacks and ignited simultaneously.

The fire tests should be conducted for 10 minutes after the activation of the first nozzle, and any

remaining fire should be extinguished manually.


.1 No ignition or charring of the target cartons is allowed.

.2 No more than 50% of the cartons filled with plastic cups should be consumed.

***

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ANNEX 4

DRAFT GUIDELINES FOR HIGH EXPANSION FOAM

USING INSIDE AIR

Item Requirement Discussion Comments1

DRAFT GUIDELINES FOR THE

APPROVAL OF INSIDE AIR FOAM

SYSTEMS

1 General

SOLAS provides for and accepts the use of

high expansion foam systems inside machinery

spaces. The fixed high expansion foam fire-

extinguishing system providing foamgenerators inside the protected space should

demonstrate by a test to have the capability of

extinguishing a variety of fires, which may

occur in a ship’s engine room.

2 2 Definitions

2.1 Foam solution is a solution of foam

concentrate and water.

2.2 Foam concentrate is the liquid which,

when mixed with water in the appropriateconcentration forms a foam solution.

2.3 Foam generator is a discharge device

consisting of a nozzle or set of nozzles and a

casing. The casing is typically made of

perforated steel / stainless steel plates shaped

into a box that enclose the nozzle(s).

2.4 Inside air foam system is a fixed high

expansion foam fire extinguishing system with

foam generators located inside the protected

space.

2.5 Nominal flow rate is the foam solution

flow rate expressed in L/min.

2.6 Nominal application rate is the flow

rate per area, i.e. expressed in L/min/m2.

2.7 Nominal foam expansion ratio is the

ratio of the volume of foam to the volume of

foam solution from which it was made.

2.8 Nominal foam production is the

volume of foam produced per time unit, that is

nominal flow rate times nominal foam

expansion ratio, expressed in m3/min.

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2.9 Nominal filling rate is the ratio of

nominal foam production to the area, i.e.

expressed in m/min.

2.10 Nominal filling time is the ratio of the

height of the protected space to the nominal

filling rate, i.e. expressed in minutes.

3 3 Principal requirements for the

system

3.1 Principal performance:

.1 The system should be capable of

manual release. Automatic releaseof the system should not be

permitted, except as permitted by

the Administration.

4 .2 The system should be capable of

fire extinction, and tested in

accordance with appendix 2 to this

guideline.

5 .3 The expansion ratio and drainage

time of the foam concentrate

should be approved by theAdministration in accordance with

MSC/Circ.670. However, the fire

tests specified in paragraph 3.8 of

the annex to MSC/Circ.670 need

not be applied. [The foam

concentrate should be approved in

accordance with (small scale foam

quality test to be developed)]

Co-ord

Clarification.

Sweden

Need to have small scale testsspecific to inside air

applications. The tests should

include repeatable exposure to

heat and smoke

Japan

Japan considers the small scale

foam quality test is not

necessary, since the fire test

using the 500 m3

enclosure

sufficiently assesses the foam

quality. Small scales test seems

to require duplicate fire tests.

For member’s reference, vessels

gross tonnage having 500 m3

ER is around 2,000 tons.

6 .4 The foam generators should be

successfully tested in accordance

with appendix 1 to this guideline.

7 Deleted

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8 3.2 Requirements for the system:

.1 Electrical power for the system should be supplied from emergency power.

The system should be supplied by both

main and emergency sources of power

and should be provided with an

automatic change-over switch. The

emergency power supply should be

provided from outside the protected

machinery space

Germany

Harmonize with MSC/Circ.668

Japan

Where the system is applied to

machinery spaces of category A,

main source supply is not

necessary because main source

should be cut off in case of fire

in the machinery spaces.

Therefore, Japan proposes to

retain the original text as it is.

9 .2 The system and its components should be suitably designed to withstand

ambient temperature changes,

vibration, humidity, shock, clogging

and corrosion normally encountered in

machinery spaces or cargo pump room

in ships, and manufactured and tested

to the satisfaction of the

Administration in accordance with the

requirements given in appendix 1 to

these Guidelines. Components inside

the protected spaces should be

designed to withstand the elevatedtemperatures, which could occur

during a fire.

10 Deleted

11 .4 Foam generators and System piping,

components and pipe fittings in contact

with the foam concentrate should be

constructed of corrosion resistant

materials such as stainless steel, CuNi

alloy or equivalent. Other system

piping and foam generators should be

galvanized steel or equivalent. [If the

system components (such as foam

proportioner, foam concentrate pump,

etc.) should be constructed of copper

or copper alloy by practical reason, an

effective means of protection such as a

steel cover or “A-60” insulation should

be provided, unless the components are

not located in a high fire risk area]

Norway

Add requirements for corrosion

resistant.

Japan

Japan proposes to add “and

water constantly” after

concentrate, because the

corrosion should be considered

only in such cases.

Korea

Foam generators would not be in

contact with foam concentrate.

Also propose deleting CuNialloy due to low melting point.

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11

bis

.4bis Means to test the foam and water

pumps as well as means to realistically

test at least one foam generator should be provided. All sections of piping

should be provided with connections

for flushing, draining and purging with

air.

12 .5 The expansion ratio of the foam should

not exceed 1,000 to 1. The quantity of

foam concentrate available should be

sufficient to produce foam for the

minimum operation time specified by

the manufacturer, but not less than

30 minutes.

13 .6 Means should be provided for the crew

to safely check the quantity of foam

concentrate and take periodic control

samples for foam quality.

14 .7 Operating instructions for the system

should be displayed at each operating

position.

15 .8 Spare parts should be provided in

accordance with the manufacturer’s

instruction.

16 .9 Filling rate for the system should be

followed the results of the test to be

conducted in accordance with appendix

2. Where the volume of the machinery

space in question is more than that of

the class 3 test enclosure, the test data

of filling rate conducted in the class 3

test enclosure can be used for approval.

[The design filling rate for the system should be based on the nominal filling rate calculated on the

basis of the nominal foam expansion ratio and the

nominal application rate used during the approval

tests in accordance with appendix 2. The nominal

foam expansion ratio should be determined

according to EN 13565-1]

[The design filling rate for the system should be

adequate to completely fill the largest protected

space in [2][10] minutes or less.]

Sweden

The design filling rate should be based on the rate used in the

approval tests. Also the

maximum fill time should be 10

minutes

USA

We propose that instead of a

filling rate, a maximum filling

time of 2 minutes should bespecified for all applications

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Poland

Agree with USA

Japan

Japan considers that filling up

time should be determined,

taking the character/performance

of each fixed fire fighting

system into account. CO2

system should be filled up the

space for short time taking into

account the leakage from

dampers, etc. On the other

hand, high expansion foam andwater systems are not necessary

to fill up for shorter time, taking

into account the cooling effect

by water and fire extinguishing

scenario and that machinery

spaces are protected by “A-60”

insulation. Therefore, Japan

considers that filling rate not

less than 1 m/min is enough

requirement to the system.

Therefore Japan proposes to

retain the original text as it is.17 .10 If an internal combustion engine is

used as a prime mover for the seawater

pump for the system, the fuel oil tank

to the prime mover should contain

sufficient fuel to enable the pump to

run on full load for at least 3 hours and

sufficient reserves of fuel should be

available outside the machinery space

of category A to enable the pump to be

run on full load for an additional

15 hours. If the fuel tank serves other

internal combustion engines

simultaneously, the total fuel tank

capacity should be adequate for all

connected engines.

18 .11 Means should be provided for

automatically giving audible and visual

warning of the release of the system.

The alarms should operate for the

length of time needed to evacuate the

space, but in no case less than 20

seconds.

Norway

Propose to delete

Japan

Japan proposes to retain thisrequirement as it is, taking a risk

to the crew by foam including

combustion gases into account.

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Poland

Agree with Japan

19 .12 The arrangement of foam generatorsand piping in the protected space

should not interfere with access to the

installed machinery for routine

maintenance activities.

20 .13 The system source of power supply,

foam concentrate supply and means of

controlling the system should be

readily accessible and simple to

operate, and should be arranged at

positions outside the protected space

not likely to be cut off by a fire in the protected space.

21 Deleted

22 .14 Arrangements of foam generators

should in general be designed based on

the approval test results. The number

of generators may be different, but the

minimum filling rate determined

during approval testing should be

provided by the system.

23 .15 Foam generators should be uniformly

distributed under the uppermost ceiling

in the protected spaces including the

engine casing. Extra foam generators

may be required in obstructed

locations. The foam generators should

be arranged with at least 1 m free space

in front of the foam outlets, unless

tested with less clearance.

24 Deleted

25 .7 The piping system should be sized in

accordance with a hydraulic

calculation technique*

to ensure

availability of flows and pressures

required for correct performance of the

system.

26 .8 The control system of ventilation

fans**

, discharge alarm and oil pumps**

should be available at the position(s)where this extinguishing system is

controlled.

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27 APPENDIX 1

COMPONENT MANUFACTURING

STANDARDS FOR INSIDE AIR FOAM

SYSTEMS

Foam generators nozzles installed in the protected

space should be tested in accordance with the

following items stipulated in appendix A to

MSC/Circ.668 and generators should be tested in

accordance with the following items 1 and 6:

.1 dimension;

.2 flow constant: the value of the flow

constant K should be determined by

measuring the flow at the maximum

operational pressure, minimum

operational pressure and the middle

operational pressure;

.3 stress corrosion;

.4 sulphur dioxide corrosion: visual

inspection only may be carried out;

.5 salt spray corrosion: the test may be

carried out at NaCl concentration

of 5%. Paragraph 3.14.2 in appendix A

to MSC/Circ.668 need not to apply;

.6 resistance to heat: where the

components are made of steel, this test

need not be applied;

.7 impact test: only, the nozzles may need

to be tested; and

.8 clogging test: where the diameter of

the opening of the nozzle exceeds

[1.5 mm], this test need not apply.

[Foam generators should be tested in accordance

with the following items stipulated in EN

13565-1:

• Clause 4: General construction requirements

(4.1-connections, 4.5-corrosion resistance of

metal parts, 4.8-heat and fire resistance)

•

Clause 5: Discharge coefficients• Clause 6: Quality of foam (6.2-High-expansion

components)

Norway

This section should only apply

to foam nozzles and should be

based on revised MSC/Circ.913,

whereas a suitable set of design

requirements may be defined for

the casing.

Japan

Japan proposes that the tests

specified in paragraphs .3 and .4

should be applied to the nozzles

only, taking into account thenecessity of application of these

tests to casings and that it

is impossible to carry out

these tests for large objects such

as the casings. Additional tests

according to EN 13565-1 are not

familiar worldwide and the tests

mentioned in original ones

are enough to assess the

components. Therefore, Japan

proposes to delete “ and should

meet the requirements of clauses5 & 9 of EN 13656-1”

Sweden

Water mist nozzle component

tests are not appropriate.

Recommend using EN 13565-1

plus an added vibration test

taken from MSC/Circ.668

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• Clause 9: Components for medium and

high-expansion foam systems

Foam generators should also be able to withstand

the effects of vibration without deterioration of

their performance characteristics when tested in

accordance with (paragraph 4.16 of appendix A to

MSC/Circ.668) After the vibration test according

to (paragraph 4.16 of appendix A to

MSC/Circ.668) the generators should show no

visible deterioration and should meet the

requirements of (clauses 5 & 9 of EN13565-1)

28 APPENDIX 2

TEST METHOD FOR HIGH EXPANSION

FOAM FIRE-FIGHTING SYSTEM

1 Scope

The test method is intended for evaluating the

extinguishing performance of inside-air high-

expansion foam fire-fighting systems. System

design should be based on the conditions used

during the specified fire tests

2 Sampling

The components to be tested should be supplied

by the manufacturer together with design and

installation criteria, operational instructions,

drawings and technical data sufficient for the


29 3 Fire tests

3.1 Test principles

This test procedure enables the determination of

design criteria and the effectiveness of high

expansion foam fire-extinguishing system against

spray and pool fires, which are obstructed by a

simulated engine.

3.2 Test description

3.2.1 Test enclosure

3.2.1.1 The fire extinguishing tests of the system

should be carried out using the following test

compartments:

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.1 test compartment 1: the test should be

performed in a 100 m2 room with 5 m

ceiling height and ventilation through a2 m x 2 m door opening according to

figure X (figure 2 in MSC/Circ.668).

The engine mock-up should be

designed according to figure Y

(figure 2-3 in MSC/Circ.668). The

door opening to the test compartment

may be covered during the test at the

same rate as the foam layer is building

up in the compartment to avoid foam

leakage through the door opening;

.2 test compartment 2: the test should be performed in a test compartment

having a volume of between 1,200

to 3,000 m3 and a height exceeding

7.5 m. The ventilation of the test

compartment should be as in test

compartment 1 but with four additional

1 m2

square ventilation openings

located at each corner of the ceiling.

The foam generators should not be

positioned near the ceiling openings;

and

.3 test compartment 3: the same

arrangement should be used as for test

compartment 2 but without any ceiling

in order to avoid any restrictions in air

supply. The height of the walls must be

high enough to avoid foam overflow

which will depend on the performance

of the system.

3.2.1.2 Any test enclosure should be provided

with natural or forced ventilation to ensure that

the oxygen concentration at the fire locationshould be a minimum of 20% (by volume) at the

start of the test. The ventilation should be

arranged so that fresh air from the ventilation

should not been taken into the foam generators

directly.

Sweden

Propose three different fire

scenarios to account for varyingshipboard ventilation and

configuration parameters

Japan

Japan considers that two fire

scenarios using small (500 m3)

and large (3,000-4,000 m3) test

enclosures are enough to assess

the performance of the system,

taking volume and ventilationcondition of the machinery

space, duration and cost of

approval test into account.

Furthermore, Japan considers

that the test using the

small test compartment should

be conducted to assess the affect

by smoke produced by the test

fire and the test using the

large compartment should be

conducted for confirmation of

the system performance.

Sweden

Delete the entire paragraph.

Covered by the vent conditions

in the 3 new fire test scenarios

30 3.2.2 Simulated engine

The fire test should be performed in a test

apparatus consisting of:

.1 A simulated engine of size (width x

length x height) 1 m x 3 m x 3 m

constructed of sheet steel with a

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nominal thickness of 5 mm. The

simulated engine is fitted with two

steel tubes of 0.3 m in diameter

and 3 m in length, which simulateexhaust manifolds and a grating. At the

top of the simulated engine a 3 m2

tray

is arranged (figure 1); and

.2 A floor plate system of 4 m x 6 m and

0.5 m in height surrounding the

simulated engine with a tray (4 m2

in

area), underneath (figure 1).

31 3.2.3 Test Program

The fire test should be carried out using followingfire scenarios.

.1 combination of the following fire

programs (test fuel: commercial fuel

oil or light diesel oil):

.1 low-pressure spray on top

of the simulated engine centred

with nozzle angled upward

at a 45-degree angle to strike a

12–15 mm diameter rod 1 m away;

and

.2 fire in trays under (4m2) and on top

(3m2) of the simulated engine.

.2 high-pressure horizontal spray fire on

top of the simulated engine. (Test fuel:

commercial fuel oil or light diesel oil);

.3 low pressure concealed horizontal

spray fire on the side of the simulated

engine with oil spray nozzle positioned

0.1 m in from the end of the simulated

engine and 0.1 m2

tray positioned 1.4

m in from the engine end at the inside

of floor plate. (Test fuel: commercial

fuel oil or light diesel oil); and

.4 flowing fire 0.25 kg/sec from top of

mock-up (test fuel: heptane)

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Fire type Low

pressure

High

pressure

Spray

nozzle

Wide spray

angle (120°to 125°)

full cone

type

Standard

angle(at 6 bar)

full cone

type

Nominal oil

pressure

8 bar 150 bar

Oil flow 0.16 ± 0.01

kg/s

0.050

±0.002 kg/s

Oil

temperature

20 ± 5°C 20 ± 5°C

Nominal

heat releaserate

5.8 ± 0.6

MW

1.8 ± 0.2

MW

32 3.2.4 Installation requirements for tests:

.1 foam generators should not be installed

above the simulated engine in such a

way that the foam flow directly hits the

test fires;

.2 foam generators should be installed at

the uppermost level of the space. Thedistance between the generators and

test ceiling and floor should be

recorded and reflected in the

manufacturer’s design manual; and

.3 the number and spacing of foam

generators should be in accordance

with the manufacturer’s system design

and installation manual.

33 4 Test procedure

4.1 Preparation

.1 the tray(s) used in the tests should be

filled with at least 50 mm fuel on a

water base. Freeboard should be

150±10 mm, except for the 3 m2

tray

on top of the simulated engine where

the freeboard should be 50±10 mm;

and

.2 Seawater or simulated seawater specified in paragraph 3.6.3 of

MSC/Circ.670 should be used for the

fire test, except the case where it is

Sweden

Propose alternate text

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shown that fresh water gives the same

level of performance as seawater.

Seawater or simulated seawater

specified in paragraph 3.6.3 of MSC/Circ.670 should be used for the

fire tests. However, fresh water may be

used for practical reasons if it is shown

that seawater provides the same level

of performance. This should be done

either by repeating the fresh water test

with the longest time to

extinguishment to ensure that the

minimum performance requirements is

still fulfilled or to use the small scale

test method for foam concentrates

intended for inside air systems(paragraph 3.1.3). If the system is

tested in more than one test

compartment, the seawater test should

be performed in test compartment 2

or 3.

Japan

Since paragraph 3.6.3 is widely

used as simulated seawater for foam concentration and

such seawater has been

demonstrated to produce foam

having the same level of

performance as foam produced

by seawater, additional tests

using seawater are not

necessary. Therefore, Japan

proposes to retain the original

text as it is.

34 4.2 Measurements

The following should be measured during the

test.:

.1 oil flow and pressure in the oil system;

.2 foam concentrate flow and pressure

and water flow and pressure in the

extinguishing system;

.3 oxygen concentration in the test

compartment. The sampling point

should be located 4.5 m from the

centre of the engine mock-up on the

exhaust pipe side and 2.5 m from floor

level (The measurement may be

terminated when the foam fills up to

the oxygen sampling point); and

.4 temperatures at the fire locations.

Thermocouples should be located 1 m

in front of the spray nozzles and 0.5 m

above the tray fuel surface to provide

additional information about time to

extinguishment.

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35 4.3 Pre-burn

After ignition of all fuel sources, a 2-minute pre-burn time for the tray fires and 10 to

15 seconds for the spray and heptane fires is

required before the extinguishing agent is

discharged.

Sweden

We propose a 2-minute pre-burnfor all test fires

USA

Agree with Sweden

Poland

Agree with Sweden. We also

propose a 20% design safety

factor when calculating the

required quantity of foam.

Japan

Since spray nozzles for spray

fire are located with certain

height, which is not less than

3 m, spray fire is continuously

burned until foam is filled up to

the position of the spray fire

(that is pre-burn time is

normally not less than

1.5 minutes). Therefore, Japanconsiders that pre-burn time of

10-15 seconds is enough

duration to confirm continuous

burning of spray fire.

Therefore, original text should

be retained as it is.

36 4.4 Duration of test

Extinguishing agent should be discharged for

50% of the discharge time recommended by the

manufacturer or 15 minutes whichever is less.

The oil spray, if used, should be shut of

15 seconds after the end of agent discharge. The

oil spray, if used should be shut off 30 seconds

after the fire has been judged extinguished. The

overall time to extinction may not exceed [15][5]

minutes (or 50% of the recommended discharge

time).

Sweden

Propose alternate text.

USA

Propose 5 minutes as the

maximum time to extinction.

Japan

The original text should be

retained due to the reasons

mentioned in item number 16.

37 4.5 Observations before the fire test

Temperature of the test room, fuel and thesimulated engine should be measured and

recorded.

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38 4.6 Observations during the fire test

The following observations should be recorded:

.1 start of ignition procedure;


.3 time when the system is activated;

.4 time when the fire is extinguished;

.5 time when the system is shut off;

.6 time when the fire is re-ignited, if any;

.7 time when the oil flow for the spray

fire is shut off; and

.8 time when the test is finished.

39 4.7 Observations after fire test

The following should be recorded:

.1 damage to any system components;

.2 level of fuel in the tray(s) to make sure

that no limitation of fuel occurred

during the test; and

.3 temperatures of test room, fuel and the

simulated engine.

40 5 Classification criteria

At the end of discharge of foam and fuel at each

test, there should be no re-ignition or fire spread.

41 6 Test report

The test report should include the following

items:

.1 name and address of the test

laboratory;

.2 date and identification number of the

test report;

.3 name and address of client,

manufacturer and/or supplier of the

system;


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.5 name or other identification marks of

the product;

.6 description of the test product;

.7 date of the test;

.8 test methods;


.10 identification of the test equipment and

instruments used (including type and

manufacturer of the foam

concentration);

.11 conclusions;


.13 test results including observation and

measurement before, during and after

the test; and


42 7 Application of Test Results

Systems that have been successfully tested to the

provisions of paragraph 3 may be installed in

different size spaces according to the following:

.1 the extinguishing system configuration

used for the test compartment 1 tests

may be applied to systems for the

protection of shipboard spaces of equal

or less volume and with restricted

airflow;

.2 the extinguishing system configurationused for the test compartment 2 tests


protection of shipboard spaces with

volumes and ventilation conditions

between test compartments 1 and 3

using linear interpolation; and

.3 the extinguishing system configuration

used for the test compartment 3 tests


protection of shipboard spaces of equal

or greater volumes and no restriction inventilation.

Sweden

Guidance is needed on

application of test results to

different size compartments.

Japan

This sentence should be deleted,

since it is impossible to apply to

ships, because it is impossible to

define the restricted airflow in

the machinery spaces.

***

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PROPOSED AMENDMENTS TO FSS CODE, CHAPTER 7

Option 1

Chapter 7 Fixed pressure water-spraying and water-mist fire-extinguishing systems

1 Application

This chapter details the specifications for fixed pressure water-spraying and water-mist

fire-extinguishing systems as required by chapter II-2 of the Convention.

2 Engineering specifications

2.1 Fixed pressure water-spraying fire-extinguishing systems

Fixed-pressure water-spraying fire-extinguishing systems for machinery spaces and cargo pump

rooms shall be approved by the Administration based on the guidelines developed by the

Organization*.

2.2 Equivalent water-mist fire-extinguishing systems

Water-mist fire-extinguishing systems for machinery spaces and cargo pump rooms shall be

approved by the Administration based on the guidelines developed by the Organization∗.

* Refer to “Revised guidelines for the approval of equivalent water-based fire-extinguishing systems for machinery spaces and cargo pump room” (MSC/Circ.1165).

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Option 2

Chapter 7 Fixed pressure water-spraying and water-mist fire-extinguishing systems

1 Application

This chapter details the specifications for fixed pressure water-spraying and water-mist

fire-extinguishing systems as required by chapter II-2 of the Convention.

2 Engineering specifications

2.1 Fixed pressure water-spraying fire-extinguishing systems

2.1.1 Nozzles and pumps

2.1.1.1 Any required fixed pressure water-spraying fire-extinguishing system in machinery

spaces shall be provided with spraying nozzles of an approved type. The system shall be

available for immediate use and capable of continuously supplying water for at least 20 minutes.

2.1.1.2 The system and its components shall be suitably designed to withstand ambient

temperature changes, vibration, humidity, shock, impact, clogging and corrosion normally

encountered in machinery spaces. Components within the protected spaces should be designed to

withstand the elevated temperatures which could occur during a fire. Components should be

tested in accordance with the listed sections of appendix A of MSC/Circ.1165, as modified

below:

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MSC/Circ.1165

appendix A, paragraph No.

Modifications

3.1 Dimensions Nozzles should be provided with a nominal 12 mm (1/2 inch) or larger inlet thread

3.4.1 Flow constant

3.4.2 Water distribution

3.4.3 Water drop size and

velocity

3.11.1 Stress corrosion

3.11.2 Sulphur dioxidecorrosion

Open nozzles should be subject to post test visual examination.The requirements of paragraph 3.14.2 are not applicable.

3.11.3 Salt spray corrosion The NaCl concentration used for the test should be [5,20%].

Following exposure, open nozzles should meet the flow constant

requirements of paragraph 3.4.1. The requirements of

paragraph 3.14.2 are not applicable.

3.12 Integrity of nozzle

coating

Applicable only if the nozzles have wax or bitumen coatings.

3.15 Resistance to heat

3.16 Resistance to vibration Open nozzles shall be subject to post test visual examination.

The requirements of paragraphs 3.5 and 3.8 are not applicable.

3.17 Impact test

3.22 Clogging test

2.1.1.2 The number and arrangement of the nozzles shall be to the satisfaction of the

Administration and shall be such as to ensure an effective average distribution of water of at

least 5 [X] l /m2

per minute in the spaces to be protected. Where increased application rates areconsidered necessary, these shall be to the satisfaction of the Administration. An indication of

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

Protected area Application rate

Boiler fronts or roof, firing areas, oil fuel units,

centrifugal separators (not oily water separators),

oil purifiers and clarifiers 20 l /min

Hot oil fuel pipes near exhausts or similar heated

surfaces on main or auxiliary diesel engines 10 l /min

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2.1.1.3 Precautions shall be taken to prevent the nozzles from becoming clogged by

impurities in the water or corrosion of piping, nozzles, valves and pump.

2.1.1.4 The pump shall be capable of simultaneously supplying at the necessary pressure allsections of the system in any one compartment to be protected.

2.1.1.5 The pump may be driven by independent internal combustion machinery but, if it is

dependent upon power being supplied from the emergency generator fitted in compliance with

the provisions of regulation II-1/44 or regulation II-1/45, as appropriate, that generator shall be so

arranged as to start automatically in case of main power failure so that power for the pump

required by paragraph 2.1.1.4 is immediately available. The independent internal combustion

machinery for driving the pump shall be so situated that a fire in the protected space or spaces

will not affect the air supply to the machinery.

2.1.2 Installation requirements

2.1.2.1 Nozzles shall be fitted above bilges, tank tops and other areas over which oil fuel is

liable to spread and also above other specific fire hazards in the machinery spaces.

2.1.2.2 The system may be divided into sections, the distribution valves of which shall be

operated from easily accessible positions outside the spaces to be protected and will not be

readily cut off by a fire in the protected space.

2.1.2.3 The pump and its controls shall be installed outside the space or spaces to be

protected. It shall not be possible for a fire in the space or spaces protected by the water-spraying

system to put the system out of action.

2.1.2.4 The piping system should be sized in accordance with a hydraulic calculation

technique** to ensure availability of flows and pressures required for correct performance of the

system.

2.1.3 System control requirements

The system shall be kept charged at the necessary pressure and the pump supplying the water for

the system shall be put automatically into action by a pressure drop in the system.

** Where the Hazen-Williams Method is used, the following values of the friction factor "C" for different pipe

types which may be considered should apply:

Pipe type C

Black or galvanised mild steel 100Copper and copper alloys 150Stainless steel 150

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2.1.4 Additives

Foam concentrates suitable for extinguishing oil fires may be used to supplement the system

water supply. The quantity of foam provided shall be adequate to operate the system at fullcapacity for 20 minutes.

2.2 Equivalent water-mist fire-extinguishing systems

Water-mist fire-extinguishing systems for machinery spaces and cargo pump rooms shall be

approved by the Administration based on the guidelines developed by the Organization∗.

***

∗ Refer to the “Revised guidelines for the approval of equivalent water-based fire-extinguishing systems for machinery spaces and cargo pump rooms” (MSC/Circ.1165).

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ANNEX 6

PROPOSED AMENDMENTS TO CHAPTER 4 OF THE FSS CODE

3.2 Portable foam applicators

A portable foam applicator unit shall consist of a foam nozzle of an inductor type and

inductor capable of being connected to the fire main by a fire hose, together with a

portable tank containing at least 20 l of foam concentrate and one spare tank of foam

concentrate.

3.2.1 System Performance

3.2.1.1 The nozzle shall be capable of producing effective foam suitable for extinguishing an

oil fire, at a waterflow rate of at least 200 l pm [1.5 m3/min with the foam expansion ratio

determined in 3.2.1.2.]

3.2.1.2 The foam concentrate shall be approved by the Administration based on guidelines

developed by the Organization*.

3.2.1.3 The foam produced by the portable foam applicator unit shall have an expansion ratio

and drainage time within 10% of that determined in 3.2.1.2.

3.2.1.4 The portable foam applicator unit shall be designed to withstand ambient temperature

changes, vibration, humidity, shock, impact, clogging and corrosion normally encountered on

ships.

***

* Refer to the “Guidelines for the performance and testing criteria and surveys of low-expansion foam

concentrates for fixed fire-extinguishing systems” (MSC/Circ.582/Corr. 1).

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ANNEX 7

PROPOSED AMENDMENTS TO

GUIDELINES FOR THE APPROVAL OF FIXED AEROSOL FIRE-EXTINGUISHING

SYSTEMS EQUIVALENT TO FIXED GAS FIRE-EXTINGUISHING SYSTEMS, AS

REFERRED TO IN SOLAS 74, FOR MACHINERY SPACES (MSC/Circ.1007)

General

1 Fixed aerosol fire-extinguishing systems for use in machinery spaces of category A

equivalent to fire-extinguishing systems required by SOLAS regulation II-2/10.5 should prove

that they have the same reliability which has been identified as significant for the performance of

fixed gas fire-extinguishing systems approved under the requirements of the FSS Code,

chapter 5. In addition, the system should be shown by testing according to the appendix to have

the capability of extinguishing a variety of fires that can occur in machinery spaces.

2 Aerosol fire-extinguishing systems involve the release of a chemical agent to extinguish a

fire by interruption of the process of the fire. There are two methods considered for applying the

aerosol agent to the protected space:

.1 condensed aerosols are created in pyrotechnical generators through the

combustion of the agent charge; and

.2 dispersed aerosols that are not pyrotechnically generated and are stored in

containers with carrier agents (such as inert gases or halocarbon agents) with the

aerosol released in the space through valves, pipes and nozzles.

Definitions

3 Aerosol is a non ozone depleting fire-extinguishing medium consisting of finely divided

solid particles of chemicals released into a protected space as either condensed aerosol or

dispersed aerosol.

4 Generator is a device for creating a fire-extinguishing medium by pyrotechnical means.

5 Design application density (g/m³ ) is the mass of an aerosol forming composition per m³ of

the enclosure volume required to extinguish a specific type of fire, including a safety factor of 1.3 times the test density.

6 Agent – medium for the purpose of these guidelines, these words are interchangeable.

Principal requirements

7 The minimum agent density should be determined and verified by the full-scale testing

described in the test method, as set out in the appendix.

8 For aerosol systems, the discharge time should not exceed 120 seconds for 85% of the

design density. Systems may need to discharge in a shorter time for other reasons than for fire-extinguishing performance.

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9.1 The quantity of extinguishing agent for the protected space should be calculated at the

minimum expected ambient temperature using the design density based on the net volume of the

protected space, including the casing.

9.2 The net volume of a protected space is that part of the gross volume of the space, which is

accessible to the fire-extinguishing agent.

9.3 When calculating the net volume of a protected space, the net volume should include the

volume of the bilge, the volume of the casing and the volume of free air contained in air receivers

that in the event of a fire may be released into the protected space.

9.4 The objects that occupy volume in the protected space should be subtracted from the

gross volume of the space. They include, but are not necessarily limited to:

.1 auxiliary machinery;

.2 boilers;

.3 condensers;

.4 evaporators;

.5 main engines;

.6 reduction gears;

.7 tanks; and

.8 trunks.

9.5 Subsequent modifications to the protected space that alter the net volume of the space

should require the quantity of extinguishing agent to be adjusted to meet the requirements of this

paragraph and paragraphs 10.1, 10.2, 10.3, 10.4, 11.1, 11.2 and 11.3.

10.1 No fire suppression system should be used which is carcinogenic, mutagenic or

teratogenic at application densities expected during use. The discharge of aerosol systems toextinguish a fire could create a hazard to personnel from the natural form of the aerosol, or from

certain products of aerosol generation (including combustion products and trace gases from

condensed aerosols). Other potential hazards that should be considered for individual systems

are the following: noise from discharge, turbulence, cold temperature of vaporizing liquid,

reduced visibility, potential toxicity, thermal hazard and potential toxicity from the aerosol

generators, and eye irritation from direct contact with aerosol particles. Unnecessary exposure to

aerosol media, even at concentrations below an adverse effect level, and to their decomposition

products should be avoided.

10.2 All systems should employ two separate controls for releasing the extinguishing medium

into a protected space. Means should be provided for automatically giving visual and audiblewarning of the release of fire-extinguishing medium into any space in which personnel normally

work or to which they have access. The alarms should operate for the period of time necessary to

evacuate the space, but not less than 20 seconds before the medium is released.

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10.3 [Condensed aerosols: condensed aerosol systems for spaces that are normally occupied

should be permitted in concentrations where the aerosol particulate density does not exceed the

adverse effect level as determined by a scientifically accepted technique* and any combustion

products and trace gases produced by the aerosol generating reaction do not exceed theappropriate excursion limit for the critical toxic effect as determined in acute inhalation toxicity

tests.

10.4 Dispersed aerosols: dispersed aerosol systems for spaces that are normally occupied

should be permitted in concentrations where the aerosol particulate density does not exceed the

adverse effect level as determined by a scientifically accepted technique**. If the carrier gas is a

halocarbon, it may be used up to its NOAEL. Exposure to extinguishing agents, even at

concentrations below an adverse affect level, should not exceed 5 minutes. Unprotected

personnel should not enter a space during or after agent discharge until the protected space has

been well ventilated and cleared of residue. If a halocarbon carrier gas is to be used above its

NOAEL, means should be provided to limit exposure to no longer than the correspondingmaximum permitted human exposure time specified according to a scientifically accepted

physiologically based pharmacokinetic** (PBPK) model or its equivalent which clearly

establishes safe exposure limits both in terms of extinguishing media concentration and human

exposure time. Halocarbon agents should not be used at a gas concentration above that

determined safe for human exposure for 5 minutes. That concentration should be calculated on

the net volume of the protected space at the maximum expected temperature. If the carrier is an

inert gas, means should be provided to limit exposure to no longer than 5 minutes for inert gas

systems designed to concentrations below 43% (corresponding to an oxygen concentration

of 12%, sea level equivalent of oxygen) or to limit exposure to no longer than 3 minutes for inert

gas systems designed to concentrations between 43% and 52% (corresponding to between 12%

and 10% oxygen, sea level equivalent of oxygen).]

10.5 In no case should a dispersed aerosol system be used with halocarbon carrier gas

concentrations above the Lowest Observed Adverse Effect Level (LOAEL) nor the Approximate

Lethal Concentration (ALC) nor should a dispersed aerosol system be used with an inert gas

carrier at gas concentrations above 52% calculated on the net volume of the protected space at

the maximum expected ambient temperature, without the use of controls as provided in the

FSS Code, chapter 5, regulation 2.2.2. [and the agent storage containers should be located outside

the protected spaces in accordance with regulation II-2/10.4.3 of the Convention.]

11 The system and its components should be suitably designed to withstand ambienttemperature changes, vibration, humidity, shock, impact, clogging, electromagnetic compatibility

and corrosion normally encountered in machinery spaces. Generators in condensed aerosol

systems should be designed to prevent self-activation at a temperature below 250°C.

* Reference is made to the United States’ EPA’s Regional Deposited Dose Ratio Program in the “Methods of Derivation of Inhalation Reference Concentrations and Application of Inhalation Dosimetry”EPA/600/8-90/066F, October 1994.

** Refer to document FP 44/INF.2 – Physiologically based pharmacokinetic model to establish safe exposure

criteria for halocarbon fire extinguishing agents.

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12 The system and its components should be designed, manufactured and installed in

accordance with standards acceptable to the Organization. As a minimum, the design and

installation standards should cover the following elements:

.1 safety:

.1 toxicity;

.2 noise, generator/nozzle discharge;

.3 decomposition products; and

.4 obscuration;

.2 storage container design and arrangement:

.1 strength requirements;

.2 maximum/minimum fill density, operating temperature range;

.3 pressure and weight indication;

.4 pressure relief; and

.5 agent identification, production date, installation date and hazard

classification;

.3 agent supply, quantity, quality standards, shelf life and service life of agent and

igniter;

.4 handling and disposal of generator after service life;

.5 pipes and fittings:

.1 strength, material properties, fire resistance; and

.2 cleaning requirements;

.6 valves:


.2 elastomer compatibility;

.7 generators/nozzles:

.1 height and area testing requirements; and

.2 elevated temperature resistance;

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.8 actuation and control systems:


.2 back-up power requirements;

.9 alarms and indicators:

.1 predischarge alarm, agent discharge alarms and time delays;

.2 supervisory circuit requirements;

.3 warning signs, audible and visual alarms; and

.4 annunciation of faults;

.10 enclosure integrity and leakage requirements:

.1 enclosure leakage;

.2 openings; and

.3 mechanical ventilation interlocks;

.11 design density requirements, total flooding quantity;

.12 agent flow calculation:

.1 verification and approval of design calculation method;

.2 fitting losses and/or equivalent length; and

.3 discharge time;

.13 inspection, maintenance, service and testing requirements; and

.14 handling and storage requirements for pyrotechnical components.

13 The generator/nozzle type, maximum generator/nozzle spacing, maximum

generator/nozzle installation height and minimum generator/nozzle pressure should be within

limits tested.

14 Installations should be limited to the maximum volume tested.

15 Agent containers may be stored within a protected machinery space if the containers are

distributed throughout the space and the provisions of MSC/Circ.848, paragraph 11, as

applicable, are met, except that the arrangement of generators, containers, electrical circuits and piping essential for the release of any system should be such that in the event of damage to any

one power release line through fire or explosion in the protected space (i.e. a single fault

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concept), at least the design density of the fire-extinguishing charge as required in paragraph 10

above can still be discharged having regard to the requirement for uniform distribution of

medium throughout the space.

16 The release of an extinguishing agent may produce significant over and under

pressurization in the protected space. Measures to limit the induced pressures to acceptable

limits may have to be provided.

17 For all ships, the fire-extinguishing system design manual should address recommended

procedures for the control of products of agent decomposition. The performance of

fire-extinguishing arrangements on passenger ships should not present health hazards from

decomposed extinguishing agents, (for example, on passenger ships, the decomposition products

should not be discharged in the vicinity of assembly stations).

18 Spare parts and operating and maintenance instructions for the system should be providedas recommended by the manufacturer.

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TEST METHOD FOR FIRE TESTING OF FIXED

AEROSOL FIRE-EXTINGUISHING SYSTEMS

1 Scope

1.1 This test method is intended for evaluating the extinguishing effectiveness of fixed

aerosol fire-extinguishing systems for the protection of machinery spaces of category A.

1.2 The test method is applicable to aerosols and covers the minimum requirements for

fire-extinguishing.

1.3 The test programme has two objectives:

.1 establishing the extinguishing effectiveness of a given agent at its tested

concentration; and

.2 establishing that the particular agent distribution system puts the agent into the

enclosure in such a way as to fully flood the volume to achieve an extinguishing

concentration at all points.

2 Sampling

The components to be tested should be supplied by the manufacturer together with design and

installation criteria, operational instructions, drawings and technical data sufficient for the


3 Method of test

3.1 Principle

This test procedure is intended for the determination of the effectiveness of different aerosol

agent extinguishing systems against spray fires, pool fires and class A fires.

3.2 Apparatus

3.2.1 Test room

The tests should be performed in 100 m2 room, with no horizontal dimension less than 8 m, with

a ceiling height of 5 m. The test room should be provided with a closable access door measuring

approximately 4 m2 in area. In addition, closable ventilation hatches measuring at least 6 m2 in

total area should be located in the ceiling. Larger room may be employed if approvals are sought

for larger volumes.

3.2.2 Integrity of test enclosure

The test enclosure should be nominally leaktight when doors and hatches are closed. The

integrity of seals on doors, hatches and other penetrations (for example, instrumentation access ports) should be verified before each test.

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3.2.3 Engine mock-up:

.1 an engine mock-up of size (width x length x height) 1 m x 3 m x 3 m should be

constructed of sheet steel with a nominal thickness of 5 mm. The mock-up should be fitted with two steel tubes diameter 0.3 m and 3 m length that simulate exhaust

manifolds and a solid steel plate. At the top of the mock-up, a 3 m 2 tray should be

arranged (figures 1, 2 and 3); and

.2 a floor plate system 4 m x 6 m x 0.75 m high should surround the mock-up.

Provision should be made for placement of the fuel trays, as described in table 1,

and located as described in table 2.

3.2.4 Instrumentation

Instrumentation for the continuous measurement and recording of test conditions should beemployed. The following measurements should be made:

.1 temperature at three vertical positions (for example, 1 m, 2.5 m and 4.5 m);

.2 enclosure pressure;

.3 gas sampling and analysis, at mid-room height, for oxygen, carbon dioxide,

carbon monoxide and other relevant products;

.4 means of determining flame-out indicators;

.5 fuel nozzle pressure in the case of spray fires;

.6 fuel flow rate in the case of spray fires;

.7 discharge nozzle pressure; and

.8 means of determining generator discharge duration.

3.2.5 Generators/nozzles

3.2.5.1 For test purposes, generators/nozzles should be located within 1 m of the ceiling.

3.2.5.2 If more than one generator/nozzle is used, they should be symmetrically located.

3.2.6 Enclosure temperature

The ambient temperature of the test enclosure at the start of the test should be noted and serve as

the basis for calculating the concentration that the agent would be expected to achieve at that

temperature and with that agent weight applied in the test volume.

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3.3 Test fires and programme

3.3.1 Fire types

The test programme, as described in table 3, should employ test fires as described in table 1

below.

Table 1

Parameters of test fires

Fire Type Fuel Fire size, MW Remarks

A 76 - 100 mm ID can Heptane 0.0012 to 0.002 Tell tale

B 0.25 m2

tray Heptane 0.35

C 2 m2 tray Diesel /Fuel oil 3 (Note 1)

D 4 m2

tray Diesel /Fuel oil 6 (Note 1)

E Low pressure, low flow

spray

Heptane

0.03 ± 0.005 kg/s

1.1

F Wood crib Spruce or fir 0.3 (Note 2)

G 0.10 m2 tray Heptane 0.14

Notes:

1 Diesel/Fuel oil means light diesel or commercial fuel oil.

2 The wood crib should be substantially the same as described in ISO Standard 14520,

“Gaseous fire extinguishing systems, Part 1: General Requirements (2000)”. The crib shouldconsist of six, trade size 50 mm x 50 mm by 450 mm long, kiln dried spruce or fir lumber having

a moisture content between 9% and 13%. The members should be placed in 4 alternate layers at

right angles to one another. Members should be evenly spaced forming a square structure. Ignition of the crib should be achieved by burning commercial grade heptane in a square steel

tray 0.25 m2 in area. During the pre-burn period the crib should be placed centrally above the top

of the tray a distance of 300 to 600 mm.

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Table 2

Spray fire test parameters

Fire type Low pressure,

Low flow(E)

Spray nozzle Wide spray angle (80°)

full cone type

Nominal fuel pressure 8.5 Bar

Fuel flow 0.03 + 0.005 kg/s

Fuel temperature 20 + 5°C

Nominal heat release rate

1.1 + 0.1 MW

3.3.2 Test programme

3.3.2.1 The fire test programme should employ test fires singly or in combination, as

outlined in table 3 below.

Table 3

Test programme

Test No. Fire combinations (table 1)

1 A: Tell tales, 8 corners. (See note).

2 B: 0.25 m2

heptane tray under mock-up

G: 0.10 m2

heptane tray on deck plate located below solid steel

obstruction plate

Total fire load: 0.49 MW

3 C: 2 m2

diesel/fuel oil tray on deck plate located below solid steel

obstruction plate

F: Wood crib positioned as in figure 1

E: Low pressure, low flow horizontal spray - concealed - with

impingement on inside of engine mock-up wall.

Total fire load: 4.4 MW

4 D: 4 m2

diesel tray under engine mock-up

Total fire load: 6 MW

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Notes:

Tell-tale fire cans should be located as follows:

.1 in upper corners of enclosure 150 mm below ceiling and 50 mm from each wall;

and

.2 in corners on floors 50 mm from walls.

3.3.2.2 All applicable tests of table 3 should be conducted for every new fire-extinguishing

media.

3.3.2.3 Only test 1 is required to evaluate new nozzles and related distribution system

equipment (hardware) for systems employing fire-extinguishing media that have successfully

completed the requirements of paragraph 3.3.2.2. Test 1 should be conducted to establish andverify the manufacturer's minimum nozzle design pressure.

3.4 Extinguishing system

3.4.1 System installation

The extinguishing system should be installed according to the manufacturer's design and

installation instructions. The maximum vertical distance should be limited to 5 m.

3.4.2 Agent

3.4.2.1 Design density

The agent design density is the net mass of extinguishant per unit volume (g/m3) required by the

system designer for the fire protection application.

3.4.2.2 Test density

The test density of agent to be used in the fire-extinguishing tests should be the design density

specified by the manufacturer, except for test 1, which should be conducted at not more than 77%

of the manufacturer’s recommended design density.

3.4.2.3 Quantity of aerosol agent

The quantity of aerosol agent to be used should be determined as follows:

W = V x q (g),

where:

W = agent mass (g);

V = volume of test enclosure (m3);

q = fire-extinguishing aerosol density (g/m3).

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3.5 Procedure

3.5.1 Fuel levels in trays

The trays used in the test should be filled with at least 30 mm fuel on a water base. Freeboard

should be 150 ± 10 mm.

3.5.2 Fuel flow and pressure measurements

For spray fires, the fuel flow and pressure should be measured before and during each test.

3.5.3 Ventilation

3.5.3.1 Pre-burn period

During the pre-burn period the test enclosure should be well ventilated. The oxygen

concentration, as measured at mid-room height, should not be less than 20 volume per cent at the

time of system discharge.

3.5.3.2 End of pre-burn period

Doors, ceiling hatches and other ventilation openings should be closed at the end of the pre-burn

period.

3.5.4 Duration of test

3.5.4.1 Pre-burn time

Fires should be ignited such that the following burning times occur before the start of agent

discharge:

.1 sprays - 5 to 15 seconds;

.2 trays - 2 minutes; and

.3 crib - 6 minutes.

3.5.4.2 Discharge time

Aerosol agents should be discharged at a rate sufficient to achieve 85% 100% of the minimum

design density in 120 seconds or less.

3.5.4.3 Hold time

After the end of agent discharge the test enclosure should be kept closed for 15 minutes.

3.5.5 Measurements and observations

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3.5.5.1 Before test:

.1 temperature of test enclosure, fuel and engine mock-up;

.2 initial weights of agent containers;

.3 verification of integrity agent distribution system and nozzles; and

.4 initial weight of wood crib.

3.5.5.2 During test:

.1 start of the ignition procedure;


.3 time when ventilating openings are closed;

.4 time when the extinguishing system is activated;

.5 time from end of agent discharge;

.6 time when the fuel flow for the spray fire is shut off;

.7 time when all fires are extinguished;

.8 time of re-ignition, if any, during hold time;

.9 time at end of hold time; and

.10 at the start of test initiate continuous monitoring as per 3.2.4.

3.5.6 Tolerances


.1 length ±2% of value;

.2 volume ±5% of value;

.3 pressure ±3% of value;

.4 temperature ±5% of value; and

.5 concentration ±5% of value.

These tolerances are in accordance with ISO Standard 6182/1, February 1994 edition 4.

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4 Classification criteria

4.1 Class B fires should be extinguished within 30 seconds of the end of agent the 2-minute

discharge. At the end of the hold period there should be no re-ignition upon opening theenclosure.

4.2 The fuel spray should be shut off 15 seconds after extinguishments. At the end of the

hold time, the fuel spray should be restarted for 15 seconds prior to reopening the door and there

should be no re-ignition.

4.3 The ends of the test fuel trays should contain sufficient fuel to cover the bottom of the

tray.

4.4 Wood crib weight loss should be no more than 60%.

4.5 A re-ignition test should be conducted after the successful extinguishments of the tell-tale

fires in test 1 (Fire A) within 30 seconds after completion of agent the 2-minute discharge. The

test should involve the attempted ignition of two of the tell-tale fire containers. One container

should be at the floor level and the other at the ceiling level at the diagonally opposite corner. At

10 minutes after extinguishment of the fires, a remotely operated electrical ignition source should

be energized for at least 10 seconds at each container. The test should be repeated at one

two minutes intervals four two more times, the last at 14 minutes after extinguishment.

Sustained burning for 30 seconds or longer of any of these ignition attempts constitutes a re-

ignition test failure.

5 Test report

The test report should include the following information:

.1 name and address of the test laboratory;

.2 date and identification number of the test report;

.3 name and address of client;


.5 method of sampling system components;

.6 name and address of manufacturer or supplier of the product;

.7 name or other identification marks of the product;

.8 description of the tested product:

.1 drawings;

.2 descriptions;

.3 assembly instructions;

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.4 specification of included materials; and

.5 detailed drawing of test set-up;

.9 date of supply of the product;

.10 date of test;

.11 test method;


.13 identification of the test equipment and used instruments;

.14 conclusions;


.16 test results including measurements and observations during and after the test; and


***

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ANNEX 8

PROPOSED AMENDMENTS TO REVISED GUIDELINES FOR THE APPROVAL OF

FIXED WATER-BASED LOCAL APPLICATION FIRE-FIGHTING SYSTEMS

(ANNEX TO MSC/CIRC.913)

1 Amend paragraph 2.3 of annex 2 of document FP 48/WP.4 as follows:

“2.3 Protected area: an area (an installation or part of an installation) within a

protected space which is required to be protected by the system.

For internal combustion machinery, typical protected areas are hot surfaces such as

exhaust pipes without insulation, or with insulation fitted in accordance with

SOLAS regulation II-2/4.2.2.6.1 that is likely to be removed frequently for maintenance,

and high-pressure fuel oil systems installed near hot surfaces. For typical diesel engines,

such areas would include the area on top of the engine, the fuel injection pumps and turbochargers, unless the fuel injection pumps are installed in a sheltered location beneath the

steel platform.

For boiler fronts and oil-fired inert gas generators, typical protected areas are hot surfaces

around the burners without insulation, or with insulation fitted in accordance with

SOLAS regulation II-2/4.2.2.6.1 that is likely to be removed frequently for maintenance.

For incinerators, typical protected areas are hot surfaces around the burners without

insulation, or with insulation fitted in accordance with SOLAS regulation II-2/4.2.2.6.1

that is likely to be removed frequently for maintenance.”


“3.11 The system may be grouped into separate sections within a protected space. The

capacity and design of the system should be based on the zone section demanding the

greatest volume of water. In any case the minimum capacity should be adequate for a

single zone section protecting the largest single engine, diesel generator or piece of

machinery.”

3 Amend paragraph 3.15.2 of annex 2 of document FP 48/WP.4 as follows:

“.2 the system release should be controlled by [a combination of flame and smoke

detectors] [a detection system capable of reliably identifying the local sections].

Consideration should be given to prevent accidental release. The detection system should

provide an alarm upon activation of any single detector and discharge if two or more

detectors activate. The area of coverage of the detection system zones sections should

correspond to the area of coverage of the extinguishing system zones sections. Grouped

visual and audible alarms, as well as indication of the activated section, should be

provided in each protected space, in the engine control room and in the wheelhouse.

Audible alarms may use a single tone.”

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“3.19 Appropriate operational measures or interlocks should be provided if the engine

room is fitted with a fixed high-expansion foam or aerosol fire fighting system, to preventthe local application system from interfering with the effectiveness of the foam these

systems.”

___________

FP 50-4

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