dnv statutory interpretations, july 2008

DET NORSKE VERITAS

STATUTORY INTERPRETATIONS

JULY 2008

FOREWORDDET NORSKE VERITAS (DNV) is an autonomous and independent foundation with the objectives of safeguarding life, prop-erty and the environment, at sea and onshore. DNV undertakes classification, certification, and other verification and consultancyservices relating to quality of ships, offshore units and installations, and onshore industries worldwide, and carries out researchin relation to these functions.

PreambleThis publication presents the Society’s interpretations of adopted resolutions on matters arising from implementing the require-ments of IMO Conventions or Recommendations. Such adopted resolutions can involve uniform interpretations of ConventionRegulations or IMO Resolutions on those matters which in the Convention are left to the satisfaction of the Administration orvaguely worded.The publication covers only some relevant topics and shall under no circumstances be taken as the Society’s complete guidelineto statutory interpretations.

Comments may be sent by e-mail to [email protected] subscription orders or information about subscription terms, please use [email protected] information about DNV and the Society's services is found at the Web site http://www.dnv.com

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If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall pay compensation to such personfor his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that the maximum compen-sation shall never exceed USD 2 million.In this provision "Det Norske Veritas" shall mean the Foundation Det Norske Veritas as well as all its subsidiaries, directors, officers, employees, agents and any other acting on behalf of DetNorske Veritas.

Statutory Interpretations, July 2008 Contents –

CONTENTS

Sec. 1 Statutory Certification of vessels......................... 5A. Introduction ............................................................................5A 100 General.............................................................................. 5A 200 Objectives ......................................................................... 5A 300 Statutory Certification....................................................... 5A 400 Service suppliers ............................................................... 5

B. Applicable Statutory Requirements........................................5B 100 General.............................................................................. 5B 200 DNV Statutory Interpretations.......................................... 5B 300 Application........................................................................ 5B 400 Amendments and adoption ............................................... 5B 500 IACS Unified Interpretations............................................ 5

C. Definitions ..............................................................................5C 100 General.............................................................................. 5

D. Statutory Certification and vessels classed by the Society.....6D 100 General.............................................................................. 6

Sec. 2 SOLAS Ch.II-2Interpretations and Clarifications....................... 7

A. General....................................................................................7A 100 Application........................................................................ 7A 200 Submission of documentation........................................... 7

B. SOLAS Ch.II-2/4 Probability of Ignition ...............................7B 100 Miscellaneous items of ignition sources and ignitability..7

C. SOLAS Ch.II-2/5 Fire Growth Potential ................................7C 100 Control of air supply and flammable liquid to the space..7C 200 Fire protection materials ................................................... 7

D. SOLAS Ch.II-2/6 Smoke Generation Potential and Toxicity.................................................................................10

D 100 Paints, varnishes and other finishes, primary deck coverings......................................................................... 10

E. SOLAS Ch.II-2/7 Detection and Alarm ...............................10E 100 General requirements...................................................... 10E 200 Protection of machinery spaces ...................................... 10E 300 Protection of accommodation and service spaces and

control stations................................................................ 10E 400 Requirements of the FSS Code Ch.9 Fixed fire

detection and fire alarm systems..................................... 11

F. SOLAS Ch.II-2/8 Control of Smoke Spread ........................11F 100 Protection of control stations outside machinery spaces 11

G. SOLAS Ch.II-2/9 Containment of Fire ................................11G 100 Thermal and structural boundaries ................................. 11G 200 Protection of openings in fire-resisting divisions .......... 11G 300 Protection of openings in machinery space boundaries..11G 400 Ventilation systems......................................................... 12

H. SOLAS Ch.II-2/10 Fire Fighting..........................................12H 100 Water supply systems ..................................................... 12H 200 Portable fire extinguishers .............................................. 12H 300 Fixed fire-extinguishing systems .................................... 12H 400 Fire-extinguishing arrangements in machinery spaces... 13H 500 Fire-extinguishing arrangements in cargo spaces........... 13H 600 Fire-fighter’s outfits........................................................ 13

I. SOLAS Ch.II-2/11 Structural Integrity ................................13J. SOLAS Ch.II-2/12 Notification of Crew and Passengers ....13J 100 General requirements...................................................... 13

K. SOLAS Ch.II-2/13 Means of Escape ...................................13K 100 Means of escape from control stations, accommodation

spaces and service spaces ............................................... 13K 200 Means of escape from machinery spaces........................ 14K 300 Means of escape from ro-ro spaces................................. 14K 400 Emergency Escape Breathing Devices (EEBD) ............. 14

L. SOLAS Ch.II-2/14 Operational Readiness and Maintenance..........................................................................14

M. SOLAS Ch.II-2/15 Instructions, Onboard Training and Drills .....................................................................................14

N. SOLAS Ch.II-2/16 Operations .............................................14O. SOLAS Ch.II-2/17 Alternative Design and Arrangements ..15P. SOLAS Ch.II-2/18 Helicopter Facilities ..............................15P 100 Helicopter refuelling and hangar facilities ..................... 15Q. SOLAS Ch.II-2/19 Carriage of Dangerous Goods ...............15Q 100 General............................................................................ 15R. SOLAS Ch.II-2/20 Protection of Vehicle, Special Category

and Ro-Ro Spaces.................................................................15R 100 Precaution against ignition of flammable vapours in

closed vehicle spaces, closed ro-ro spaces and special category spaces ................................................... 15

Sec. 3 SOLAS Ch.II-2 and the FSS CodeFixed Gas Fire-extinguishing Systems.............. 16

A. General .................................................................................16A 100 Application ..................................................................... 16B. Requirements for all Gas Fire-extinguishing Systems .........16B 100 General requirements...................................................... 16C. CO2 Fire-Extinguishing Systems..........................................17C 100 General requirements...................................................... 17C 200 Fire-extinguishing systems for cargo holds.................... 18C 300 CO2 high pressure fire-extinguishing systems for

machinery spaces, cargo handling spaces and ro-ro spaces..................................................................... 18

D. Low Pressure CO2 Systems..................................................18D 100 General............................................................................ 18D 200 Testing ............................................................................ 19E. Equivalent Fixed Gas Fire Extinguishing Systems ..............19E 100 General requirements...................................................... 19

Sec. 4 SOLAS Ch.II-2 and the FSS Code, High Expansion and Inside Air Foam Systems......... 21

A. General..................................................................................21A 100 Application .................................................................... 21A 200 Definitions ...................................................................... 21A 300 Water and foam concentrate supply systems.................. 21A 400 Foam generating components and

foam generator room....................................................... 21A 500 System arrangement........................................................ 22A 600 Arrangement for machinery spaces and

cargo pump rooms .......................................................... 22A 700 Arrangement for ro-ro spaces ......................................... 22A 800 Testing of high expansion and inside air system............ 22

Sec. 5 SOLAS Ch.III and LSA Code, Lifesaving Arrangement....................................................... 24

A. General..................................................................................24A 100 Application ..................................................................... 24A 200 Scope............................................................................... 24B. Documentation......................................................................24B 100 Documentation for approval ........................................... 24C. Passenger ships and cargo ships ...........................................24C 100 General............................................................................ 24C 200 Suez Canal crew ............................................................. 24C 300 Personal life-saving appliances (SOLAS Ch.III,

Regulation 7) .................................................................. 24C 400 Survival craft muster and embarkation arrangements

(SOLAS Ch.III, Regulation 11)...................................... 24C 500 Stowage of survival craft (SOLAS Ch.III,

Regulation 13) ................................................................ 25C 600 Survival craft launching and recovery arrangements

(SOLAS Ch.III, Regulation 16)...................................... 25C 700 Rescue boat embarkation, launching and recovery

arrangements (SOLAS Ch.III, Regulation 17) ............... 25C 800 Pilot ladder arrangements (SOLAS Ch.V,

Regulation 23) ................................................................ 25

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Statutory Interpretations, July 2008 – Contents

D. Passenger ships (additional requirements) ........................... 25D 100 Survival craft and rescue boats (SOLAS Ch.III,

Regulation 21).................................................................25D 200 Personal life-saving appliances (SOLAS Ch.III,

Regulation 22).................................................................25D 300 Additional requirements for ro-ro passenger ships

(SOLAS Ch.III, Regulation 26) ......................................25E. Cargo ships (additional requirements).................................. 25E 100 Survival craft and rescue boats (SOLAS Ch.III,

Regulation 31).................................................................25E 200 Personal life-saving appliances (SOLAS Ch.III,

Regulation 32).................................................................26E 300 Survival craft embarkation and launching arrangements

(SOLAS Ch.III, Regulation 33) ......................................26F. Life-saving appliances and arrangements requirements....... 26F 100 Free-fall lifeboats (LSA-Code Ch.IV, Regulation 4.7)...26F 200 Launching and embarkation appliances

(LSA-Code Ch.VI)..........................................................26G. References ............................................................................ 26G 100 IACS Unified Interpretations (UI) ..................................26

Sec. 6 SOLAS Ch.IX - ISM Code................................. 27A. ISM Code Reg. 5.1.5 ............................................................ 27A 100 Master’s review...............................................................27

B. ISM Code Reg. 12.1 .............................................................27B 100 Annual internal audits .....................................................27C. ISM Code Reg. 12.2 .............................................................27C 100 Management review........................................................27D. ISM Code - Revised Guidelines on implementation of the

ISM Code by Administrations ..............................................27D 100 Resolution A.913(22) – 3.2.............................................27

Sec. 7 SOLAS Ch.XI-2 - Maritime Security............... 28A. General..................................................................................28A 100 Regulation 6 - Ship Security Alert System .....................28

Sec. 8 International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk - IGC Code ............................................ 29

A. General..................................................................................29A 100 Application......................................................................29B. IGC Code [Chapter 4] - Cargo Containment.......................29B 100 Construction and testing..................................................29

DET NORSKE VERITAS

Statutory Interpretations, July 2008 Sec.1 –

SECTION 1 STATUTORY CERTIFICATION OF VESSELS

A. IntroductionA 100 General101 Det Norske Veritas is an independent foundation withthe objective of safeguarding life, property, and the environ-ment. The foundation operates through the limited company DetNorske Veritas AS, which is registered in Norway and oper-ates through a worldwide network of offices.Det Norske Veritas AS carries out classification, quality assur-ance and certification of vessels, facilities and systems, andcarries out research in connection with these functions. More-over, provided its integrity is not impaired, Det Norske VeritasAS may perform assignments which utilize its knowledge orwhich contribute to develop knowledge that will be requiredfor the performance of these tasks. 102 The Society signifies Det Norske Veritas AS.103 The Board signifies the Executive Board of the Society.

A 200 Objectives201 This publication presents the Society’s interpretations ofadopted resolutions on matters arising from implementing therequirements of IMO Conventions or Recommendations. Suchadopted resolutions can involve uniform interpretations ofConvention Regulations or IMO Resolutions on those matterswhich in the Convention are left to the satisfaction of the Ad-ministration or vaguely worded.202 The interpretations will, unless otherwise instructed bythe flag administration, be the basis for the Society’s workwhen acting on behalf of a flag administration.

A 300 Statutory Certification301 The Society undertakes statutory certification on behalfof flag authorities, including approval, survey and the issuanceof statutory certificates when, and to the extent, the Society hasbeen authorised to do so by the individual flag administration.When the Society acts on behalf of a flag administration, theflag administration’s instructions prevail.302 The Society may issue Safety Management Certificates(ISM Code) and International Ship Security Certificates (ISPSCode) to vessels classed by other IACS societies, when so au-thorised by the flag administration.

A 400 Service suppliers401 Where surveyors use the services of service suppliers inmaking decisions affecting statutory requirements, the suppli-ers shall be approved by either:

— the relevant flag administration— duly authorised organisations acting on behalf of the flag

administration— an equipment supplier when explicitly described by IMO

conventions, resolutions or circulars, or— the Society.

B. Applicable Statutory RequirementsB 100 General101 The Society will perform statutory certification based onapplicable international maritime conventions, codes and reg-ulations, or supplementary requirements and interpretations

legislated by the flag administration concerned.

B 200 DNV Statutory Interpretations201 The DNV Statutory Interpretations are the Society’s in-terpretations of IMO conventions and codes. The current Stat-utory Interpretations are found in Sec.2 to Sec.7.202 The Statutory Interpretations shall be considered as sup-plementary to requirements specified by the flag administra-tion in question.203 In case of conflict between Statutory Interpretations andthose of a flag administration, the latter will generally prevail.

B 300 Application301 Statutory Interpretations will be applied to DNV classedvessels for which the Society has been authorised by flag au-thorities to undertake statutory surveys and to issue related cer-tificates.

B 400 Amendments and adoption401 New and amended Statutory Interpretations will comeinto force when published.

B 500 IACS Unified Interpretations501 In addition to the Statutory Interpretations describedherein, the Society has also adopted IACS Unified Interpreta-tions (IACS UIs).

C. DefinitionsC 100 General101 Builder: Signifies the party contracted to build a vesselin compliance with the Society’s rules.102 Certificate: A document confirming compliance withthe Society's rules or with other rules and regulations for whichthe Society has been authorized to act.103 Certification: A service confirming compliance with ap-plicable requirements on the date that the survey was complet-ed.104 Class: Class is assigned to and will be retained by ves-sels complying with applicable requirements of the Society’srules.105 Classification: A service which comprises the develop-ment of independent technical standards for vessels - the rules(see 115), and to verify compliance with the rules throughoutthe vessels' life.106 Condition on behalf of the flag Administration (CA):Constitutes specific measures, repairs or surveys that shall becarried out within a specific time limit in order to retain thestatutory certificate.A CA will be issued only when the Society has been authorisedto carry out statutory surveys on behalf of the flag administra-tion.107 Convention vessel: A vessel which due to its tonnage,usage or dimensions would, if trading in international watersor on international voyages, fall within the requirements ofany, or any part, of the IMO Conventions.108 Customer: Signifies the party who has requested the So-ciety’s service. 109 Flag administration: The maritime administration of avessel’s country of registry.

DET NORSKE VERITAS

Statutory Interpretations, July 2008 – Sec.1

110 Guidance notes: Contain advice which is not mandatoryfor the assignment or retention of class, but with which the So-ciety, in light of general experience, advises compliance.111 IACS: The International Association of ClassificationSocieties.112 IACS early warning scheme: A procedure that enablesthe IACS members to share and utilise information on seriousvessel failures. 113 IACS member society: A classification society being amember of IACS. 114 IMO: Signifies the International Maritime Organization.115 ISO: Signifies the International Organisation for Stand-ardization.116 Lay-up: A terminology used for vessels that are out ofcommission. In this state the vessel may be at anchorage orpermanently moored in a safe harbour.117 Manufacturer: Signifies the entity that manufactures thematerial or product, or carries out part production that deter-mines the quality of the material or product, or does the finalassembly of the product.118 Memorandum to Owner (MO): Constitutes informationrelated to the vessel, its machinery and equipment or to rule re-quirements. An MO will be issued in relation to informationthat does not require any corrective action or survey. 119 Non-convention vessel: A vessel other than a conventionvessel.120 Owner: Signifies the registered owner of the vessel orany other organization or person who has assumed the respon-sibility for operation of the vessel and who on assuming suchresponsibility has agreed to take over all the duties and respon-sibilities.121 Plan approval: Signifies a systematic and independentexamination of drawings, design documents and/or records inorder to verify compliance with the rules and/or statutory re-quirements. Plan approval will be carried out at the discretionof the Society, which also decides the extent and method of ex-amination. 122 Plan approval staff: Personnel authorized to carry outplan approval and to conclude whether or not compliance hasbeen met.123 Port state authority: The maritime authority in the coun-try of the vessel’s port of call.124 Quality system: Signifies both the quality managementsystem and established production and control procedures.125 Reliability: The ability of a component or a system toperform its required function under given conditions for a giv-en time interval.126 Retroactive Requirement (RR): Constitutes a class orstatutory requirement that will enter into force for certain ves-sels in operation and under construction at a given date or anupcoming survey. The RR will specify the required actions tobe taken in order to retain class or statutory certification. RR related to statutory certification will be issued only if theSociety has been authorised to carry out statutory certificationon behalf of the flag administration.127 Review: Signifies a systematic examination of drawings,design documents and/or records in order to evaluate their abil-ity to meet requirements, to identify any problems and to pro-pose necessary actions.

128 Statement of compliance: A document confirming com-pliance with specified requirements. Such documents may beissued by the Society in cases where it has not been authorizedto certify compliance.129 Survey: Signifies a systematic and independent exami-nation of a vessel, materials, components or systems in orderto verify compliance with the rules and/or statutory require-ments. Surveys will be carried out on the vessel, at the con-struction or repair site as well as at sub-suppliers and otherlocations at the discretion of the Society, which also decidesthe extent and method of control.130 Survey staff: Personnel authorized to carry out surveysand to conclude whether or not compliance has been met.131 Verification: A service that signifies a confirmationthrough the provision of objective evidence (analysis, observa-tion, measurement, test, records or other evidence) that speci-fied requirements have been met.132 Vessel: In the context of this publication mean either:

— a ship— a craft, e.g. high speed, light craft— a barge, e.g. a vessel without sufficient means of self pro-

pulsion for their service area— a vessel, e.g. naval support vessel, or — a unit, e.g. mobile offshore unit (MOU).

133 Witnessing: Signifies attending tests or measurementswhere the surveyor verifies compliance with agreed test ormeasurement procedures.

D. Statutory Certification and vessels classed by the Society

D 100 General101 It is assumed by the Society that required statutory cer-tificates for vessels classed by the Society will be issued by theSociety or by the flag administration itself, with the exceptionsmentioned in 102 to 105.The Society assumes the right to withdraw class if statutorycertificates are not issued as above.102 The Society may accept that Safety Management Certificates(ISM Code) are issued by a third party that has been authorised by theflag administration and complies with IMO MSC/Circ.1074.103 The Society may accept that International Ship SecurityCertificates (ISPS Code) are issued by a third party that hasbeen authorised by the flag administration and complies withIMO Res. A.924 and A.584.104 The Society may accept that Cargo Ship Safety RadioCertificates (SOLAS) are issued by a third party that has beenauthorised by the flag administration. 105 For a dually classed vessel, where the Society has notbeen authorised by the flag administration to issue statutorycertificates, the Society may accept that such certificates are is-sued by the dual class society and provided the other class so-ciety is authorised by the flag administration.106 For vessels having statutory certificates issued by thirdparties, except in those cases defined in 102 to 105, the classmay be withdrawn.

DET NORSKE VERITAS


SECTION 2 SOLAS CH.II-2

INTERPRETATIONS AND CLARIFICATIONS

A. GeneralA 100 Application101 This section shall be regarded as the Society’s interpre-tations of SOLAS Ch.II-2. 102 Each interpretation starts with a reference to the applica-ble technical requirement of SOLAS or the FSS Code. Follow-ing the interpretation text, reference is made to the applicableIACS interpretation. For interpretations made by the Society,

this is so indicated with “(DNV)”.

A 200 Submission of documentation201 Plans and documentation given in Table A1 shall be sub-mitted for approval. 202 Documentation types listed in Table A1 are defined inPt.0 Ch.3 Rules for Classification of Ships and give referenceto specific parts of the rules for the scope of verification.

203 For fire safety component and systems the followingshall be submitted for approval or review:

— copies of the DNV type approval certificates, or — fire test reports for the constructions and equipment which

shall be used onboard, or— type approval certificate issued by flag state (including

MED as applicable).

B. SOLAS Ch.II-2/4 Probability of IgnitionB 100 Miscellaneous items of ignition sources and ignit-ability101 SOLAS Ch.II-2/4.4.2This regulation is not intended to preclude the use of containersconstructed of combustible materials in galleys, pantries, bars, gar-bage handling or storage spaces and incinerator rooms providedthey are intended purely for the carriage of wet waste, glass bottlesand metal cans and are suitably marked. (IACS UI SC 166)

C. SOLAS Ch.II-2/5 Fire Growth Potential

C 100 Control of air supply and flammable liquid to the space101 SOLAS Ch.II-2/5.2.1.1Ventilation inlets and outlets located at outside boundariesshall be fitted with closing appliances as required by Reg. II-2/5.2.1.1 and need not comply with Reg. II-2/9.7.3.1 (IACS UI SC 100)102 SOLAS Ch.II-2/5.2.1.2 This applies to all ventilation fans (circulation fans included).(DNV)

C 200 Fire protection materials201 SOLAS Ch.II-2/5.3Regarding non-combustible materials, combustible materialsand surface flame spread, the following applies:

Table A1 Information elements to be submitted for approvalPreferred plan or

documentDocument type, ref. Pt.0 Ch.3 Rules for

Classification of Ships

Information elements

Structural fire protection plan G060 — Details of fire insulation and specification of materials and doors.

— Application of fire rated divisions for all areas and spaces

Penetration details drawing V060— Details of ventilation duct penetrations through fire divisions— Details of cable penetrations through fire divisions— Details of pipe penetrations through fire divisions

Fire main system drawing

S010S030Z030

— Fire pumps — Arrangement and construction details of fire main and isolating valves— Number and positions of hydrants and hoses— Fire pump capacity calculations

Arrangement drawings for each fixed fire-extinguish-ing system (if relevant)

V060

— Specification and location of all equipment — Reference to equipment certificates— Calculations for the quantity of the media used and the proposed rates of applica-

tion— Release instructions— Control and monitoring system

Escape route plan G120 — Arrangement of escape routes including stairways, escape trunks and escape lad-ders

Fire control plan G040 — Showing all fire safety measures onboard

DET NORSKE VERITAS


Figure 1 Schematic showing components for methods IC, IIC and IIIC - (IACS UI SC 126)

Accommodation spaces, service spaces and control stations

Corridors, stairway enclosures

18

1

2

2

3

4

13 14 7

7 5

10

6 9

12 16

17

15

8 6

10

11

4 18 11

13 14

Concealed or inaccessible spaces

DET NORSKE VERITAS


Table C1 Requirements for components, method ICA

Non-combustible

material(Reg. II-2/5.3.1.2.2)

BNon-

combustible material

(Reg. II-2/5.3.1.1)

CLow flame

spread(Reg. II-2/

5.3.2.4)

DEquivalent

volume(Reg. II-2/

5.3.2)

ECalorific

value(Reg. II-2/

5.3.2)

FSmoke

production(Reg. II-2/6)

GNot readily

ignited(Reg. II-2/

4.4.4 and 6)

1 Moulding X2 Panel X

3 Painted surfaces or Veneer or Fabric or Foils X X X X2)

4 Painted surfaces or Veneer or Fabric or Foils X X X X2)

5 Decorative panel X

6 Painted surfaces or Veneer or Fabric or Foils X X X2)

7 Skirting board X8 Insulation X1)

9Surfaces and paints in con-cealed or inaccessible spaces

X

10 Draught stops X11 Grounds and supports X X12 Lining X

13 Primary deck covering first layer X X

14 Floor finishing X3) X15 Window box X16 Window box surface X X X X

17Window box surface in concealed or inaccessible spaces

X

18 Ceiling panel X1) Vapour barriers used on pipes for cold services (see UI SC 102) may be of combustible materials providing that their surface has low flame spread char-

acteristics (Reg. II-2/5.3.1.1)2) Applicable to paints, varnishes and other finishes (Reg. II-2/6.2)3) Only in corridors and stairway enclosures

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202 SOLAS Ch.II-2/5.3.1Cold service is understood to mean refrigeration systems, i.esystems with temperatures below ambient air and sea water.(IACS UI SC102)Concerning the use of asbestos, see Rules for Classification ofShips Pt.4 Ch.1 Sec.2 A200.(DNV)Neither combustible nor oil-absorbing materials shall be usedas flooring, bulkhead lining, ceiling or deck in the engine con-trol room, machinery spaces, shaft tunnel or rooms where oiltanks are located (see also SOLAS Ch.II-2 Reg. 4.4.3).(DNV)

D. SOLAS Ch.II-2/6 Smoke Generation Potential and Toxicity

D 100 Paints, varnishes and other finishes, primary deck coverings101 SOLAS Ch.II-2/6.2 and II-2/6.3Regarding materials properties concerning smoke generationand toxicity, see C201.(IACS UI SC126)

E. SOLAS Ch.II-2/7 Detection and AlarmE 100 General requirements101 SOLAS Ch.II-2/7.2General requirements for control and monitoring, as given inthe Rules for Classification of Ships Pt.4 Ch.9 apply, includingdocumentation types to be submitted.(DNV)

E 200 Protection of machinery spaces201 SOLAS Ch.II-2/7.4This requirement applies to machinery spaces of category A.(IACS UI SC 129)

E 300 Protection of accommodation and service spaces and control stations301 SOLAS Ch.II-2/7.5.2Heat detectors are acceptable in refrigerated chambers and inother spaces where steam and fumes are produced, such as sau-nas and laundries. (IACS UI SC 130)302 SOLAS Ch.II-2/7.5.5.3In the case of vessels built in accordance with Method IIIC, thedetection system is only relevant to the accommodation block.

Table C2 Requirements for components, method IIC and IIICA

Non-combustible

material(Reg. II-2/5.3.1.2.2)

BNon-

combustible material

(Reg. II-2/5.3.1.1)

CLow flame

spread(Reg. II-2/

5.3.2.4)

DEquivalent

volume(Reg. II-2/

5.3.2)

ECalorific

value(Reg. II-2/

5.3.2)

FSmoke

production(Reg. II-2/6)

GNot readily

ignited(Reg. II-2/

4.4.4 and 6)

1 Moulding X3)

2 Panel X4)

3 Painted surfaces orVeneer or Fabric or Foils X X X X5)

4 Painted surfaces orVeneer or Fabric or Foils X X3) X2) X5)

5 Decorative panel X3)

6 Painted surfaces orVeneer or Fabric or Foils X3) X2) X5)

7 Skirting board X3)

8 Insulation X1)

9Surfaces and paints in concealed or inaccessible spaces

X

10 Draught stops X4)

11 Grounds and supports X4) X12 Lining X4)

13 Primary deck covering 1st layer X X

14 Floor finishing X6) X15 Window box X4)

16 Window box surface X3) X3) X2) X

17Window box surface in concealed or inaccessible spaces

X

18 Ceiling panel X4)

1) Vapour barriers used on pipes for cold services (see UI SC 102) may be of combustible materials providing that their surface has low flame spread char-acteristics (Reg. II-2/5.3.1.1)

2) Where the material is fitted on non-combustible bulkheads, ceiling on lining in accommodation and service spaces (Reg. II-2/5.3.2.2)3) To be applied to those accommodation and service spaces bounded by non-combustible bulkheads, ceiling and linings (Reg. II-2/5.3.2.3)4) Only in corridors and stairway enclosures serving accommodation and service spaces and control stations (Reg. II-2/5.3.1.2.2)5) Applicable to paints, varnishes and other finishes (Reg. II-2/6.2)6) Only in corridors and stairway enclosures

DET NORSKE VERITAS


Service spaces built away from the accommodation block neednot be fitted with a fixed fire detection system.(IACS UI SC 160)

E 400 Requirements of the FSS Code Ch.9 Fixed fire detection and fire alarm systems401 FSS Code Ch.9.2.1.1When it is intended that a particular section or detector shall betemporarily switched off, this state shall be clearly indicated.Reactivation of the section or detector shall be performed au-tomatically after a preset time. (DNV)402 FSS Code Ch.9.2.1.4 and 9.2.4.3.2The requirement that a system be so arranged that a loop can-not be damaged at more than one point by a fire, is consideredsatisfied by arranging the loop such that the data highway willnot pass through a space covered by a detector more than once.The requirement that a system be so arranged to ensure thatany fault occurring in the loop will not render the whole loopineffective, is considered satisfied when a fault occurring inthe loop only renders ineffective a part of the loop not beinglarger than a section of a system without means of remotelyidentifying each detector.(IACS UI SC117)403 FSS Code Ch.9.2.2 The main (respective emergency) feeder shall run from themain (respective emergency) switchboard to the change-overswitch without passing through any other distributing switch-board. (IACS UI SC35)404 FSS Code Ch.9.2.3.1When fire detectors are provided with the means to adjust theirsensitivity, necessary arrangements shall be ensured to fix andidentify the set point. (DNV)405 FSS Code Ch.9.2.4.1.1 and 9.2.5.1.1Section: Group of fire detectors and manually operated callpoints as reported in the indicating unit(s).Loop: Electrical circuit linking detectors of various sectionsand connected to the control panel. (IACS UI SC115)

F. SOLAS Ch.II-2/8 Control of Smoke Spread

F 100 Protection of control stations outside machinery spaces101 SOLAS Ch.II-2/8.2 As equally effective means, in case of ventilators these shall befitted with steel dampers which shall be easily closed withinthe control station in order to maintain the absence of smoke inthe event of fire.(DNV)

G. SOLAS Ch.II-2/9 Containment of Fire

G 100 Thermal and structural boundaries101 SOLAS Ch.II-2/9.2.3.3.2

(1) Navigation equipment room (radio transmitter). Bat-tery rooms. (Requirements for location of the emer-gency source of electrical power are further given inthe Rules for Classification of Ships Pt.4 Ch.8 Sec.2C.)

(5) Provision chambers shall be treated as store rooms. Re-frigerated provision chambers are considered as cate-gory (5) service spaces if thermally insulated with non-combustible materials.

(7) Electrical equipment rooms (auto telephone exchange,air conditioning duct spaces).

(9) Provision chambers shall be treated as store rooms. Re-frigerated provision chambers are considered as cate-gory (9) service spaces if thermally insulated withcombustible materials.

(IACS UI SC45)102 SOLAS Ch.II-2/Table 9.5The required division of steel between control stations andopen decks may in the case of an emergency generator be pro-vided with openings for intake of combustion air to the dieselengine and for intake of cooling air in the case of an air cooleddiesel engine. These openings need not be fitted with meansfor closure for fire integrity purposes, unless a fixed gas firefighting system for the emergency generator space is fitted. (IACS UI SC66)Footnote d):A galley next to a provision room requires an “A-0” bulkhead.(DNV)103 SOLAS Ch.II-2/9.2.3.4.1Dumb waiters shall be regarded as lifts. (IACS UI SC46)104 SOLAS Ch.II-2/9.2.4.2.5For the portions which face the cargo area, the A 60 standardinsulation shall be provided up to the underside of the deck ofthe navigation bridge.(IACS UI SC174)

G 200 Protection of openings in fire-resisting divisions 201 SOLAS Ch.II-2/9.4.2Balancing openings or ducts between two enclosed spaces areprohibited except for openings as permitted by Reg. 9.4.2.(IACS UI SC 119)202 SOLAS Ch.II-2/9.4.2.3Ventilation openings may also be permitted in "B" class doorsleading to lavatories, offices, pantries, lockers, store rooms etc.(IACS UI SC67)203 SOLAS Ch.II-2/9.4.2.4Watertight doors in fire-resisting divisions shall be made of steel.(DNV)

G 300 Protection of openings in machinery space boundaries301 SOLAS Ch.II-2/9.5Hatches giving access to the engine room for the transport of goodsshall be weather-tight. Where remote control for closing of the hatchis not provided, a signboard to the effect that the hatch-cover shall beclosed at all times, except during transfer of goods, shall be posted.(DNV)

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G 400 Ventilation systems401 SOLAS Ch.II-2/9.7.1.1Flexible bellows of combustible material may be used for con-necting fans to the ducting in air conditioning room. (IACS UI SC 99)402 SOLAS Ch.II-2/9.7.1.1Combustible gaskets in flanged ventilation duct connectionsare not permitted within 600 mm of an opening in an A classor B class division and in ducts required to be of A class con-struction. (IACS UI SC 175)403 SOLAS Ch.II-2/9.7.5.2.1Grease trap, fire damper, fan shut-off and fixed fire-extin-guishing are only required when a galley exhaust duct passesthrough accommodation spaces or spaces containing combus-tible materials. The term “spaces containing combustible ma-terials” will normally apply to all spaces in accommodation.(IACS UI SC 106)Fire dampers required by Reg. 9.7.5.2.1 do not need to pass thefire test in Res. A 754(18), but shall be of steel and capable ofstopping the draught. The requirements for “A” class applyonly to the part of the duct outside of the galley.(IACS UI SC118)

H. SOLAS Ch.II-2/10 Fire FightingH 100 Water supply systems101 SOLAS Ch.II-2/10.2.1.5.1When calculating the number of hydrants, the length of the wa-ter jet shall be taken as maximum 7 m.(DNV)102 SOLAS Ch.II-2/10.2.2.3.1.2Unless the two main fire pumps, their sea suctions and the fuelsupply or source of power for each pump are situated withincompartments separated at least by A-0 divisions, so that a firein any one compartment will not render both fire pumps inop-erable, an emergency fire pump shall be fitted. An arrangementin which one main fire pump is located in a compartment hav-ing more than one bulkhead or deck adjacent to the compart-ment containing the other main fire pump shall also require anemergency fire pump.(IACS UI SC 162)The room(s) where the emergency fire pump and prime moverare installed shall have adequate space for maintenance workand inspections.(IACS UR M62)103 SOLAS Ch.II-2/10.2.2.3.1.2Not only emergency pumps, but also sea water inlet, suctionand delivery pipes with valves etc. shall be outside the com-partment containing the other fire pumps. Only short lengths ofsuction and discharge piping may, however, under certain cir-cumstances penetrate the machinery spaces if enclosed in sub-stantial steel casing (Reg. II-2/10.2.1.4.1). The sea-chest with valve and the main part of the suction pip-ing shall be, in general, outside the machinery spaces. If this ar-rangement cannot be made, the sea chest may be fitted in themachinery spaces on the condition that the valve is remotelycontrolled from a position near the pump, in the same compart-ment, and the suction pipe is as short as practicable. In lieu of the steel casing the pipe may be insulated equivalentto class A-60 standard. The pipe shall have substantial wall

thickness and in no case less than 11 mm and shall be all weld-ed except for flanged connection to the sea inlet valve. (IACS UI SC 19)104 SOLAS Ch.II-2/10.2.2.3.2.2The electrical cables to the emergency fire pump shall not passthrough the machinery spaces containing the main fire pumpsand their source(s) of power and prime mover(s). They shall beof a fire resistant type where they pass through other high firerisk areas.(IACS UI SC 165)

Guidance note:See Rules for Classification of Ships Pt.4 Ch.8 Sec.2 for require-ments for cables to remain operable during a fire condition.

---e-n-d---of---G-u-i-d-a-n-c-e---n-o-t-e---

105 FSS Code Ch.12.2.2.1.1If the emergency fire pump is the main supply of water for anyfixed fire-extinguishing system provided to protect the spacewhere the main fire pumps are located, the pump shall have thecapacity for this system and, in addition, the capacity requiredby SOLAS Ch.II-2/4.3.3.2 and II-2/4.3.3.2.1.(IACS UI SC 163)106 FSS Ch.12.2.2.1.3Where necessary to ensure priming, the emergency fire pumpshall be of the self priming type.(IACS UI SC 164)It shall be demonstrated by calculation that this paragraph issatisfied at:

— the lightest seagoing condition, with account being takenof 22.5° roll and 10° pitch1)

— a loading condition without cargo or ballast water, with10% stores and fuel remaining, roll and pitch not beingtaken into account.

Upon completion of the emergency fire pump installation, aperformance test confirming the capacity required in the FSSCode, Ch.12, 2.2.1.1 and 105 shall be carried out. As far aspracticable, the test shall be carried out at lightest seagoingdraught at the suction position.

1) Where the length of the vessel exceeds 100 m, the pitch may be taken as500/L degrees where L = length of the vessel, in metres, as defined inRules for Classification of Ships Pt.3 Ch.1 Sec.1.

(DNV)

H 200 Portable fire extinguishers201 SOLAS Ch.II-2/10.3.2.1In vessels of less than 1000 gross tonnage, at least three porta-ble fire extinguishers shall be provided.(DNV)202 SOLAS Ch.II-2/10.550 kg dry powder or 45 kg CO2 is considered as equivalent to135 l foam liquid.25 kg dry powder or 20 kg CO2 is considered as equivalent to45 l foam liquid.(DNV)203 FSS Code Ch.4.3The fire-extinguishing medium in the extinguishers shall besuitable for the potential fire hazards in the protected spaces.(DNV)

H 300 Fixed fire-extinguishing systems301 On completion, the system shall be function tested. De-

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tailed requirement for high pressure CO2 systems and high-expansion foam system can be found in Sec.3 and Sec.4. (SOLAS Ch. II-2/10.4)302 SOLAS Ch. II-2/10.4.1

— For specific interpretations and clarifications for fixed gasfire-extinguishing systems see Sec.3.

— For specific interpretations and clarifications for fixedhigh-expansion foam fire-extinguishing systems andequivalent systems (inside air foam) see Sec.4.

H 400 Fire-extinguishing arrangements in machinery spaces401 SOLAS Ch.II-2/10.5.6Any installation of nozzles on board shall reflect the arrange-ment successfully tested in accordance with MSC/Circ. 913. Ifa specific arrangement of the nozzles is foreseen on board, de-viating from the one tested as per MSC/circ. 913, it can be ac-cepted provided such arrangement additionally passes fire testsbased on the scenarios of this circular.The automatic release shall be activated by a detection systemcapable of reliably identifying the local zones. Considerationshall be given to prevent accidental release.Oil fired equipment, such as inert gas generators and thermaloil heaters shall also be protected by this system, if located inmachinery spaces above 500 m3. Boiler fronts shall be interpreted as the boiler burner locationirrespective of the boiler design.Grouped visual and audible alarms, as well as indication of theactivated zone, shall be provided in each protected space, in theengine control room and in the wheelhouse.(IACS UI SC176)

H 500 Fire-extinguishing arrangements in cargo spaces501 SOLAS Ch.II-2/10.7.1.3 Ships of less than 2 000 gross tonnage carrying petroleumproducts having a flash point exceeding 60°C (closed cup test)are not required to be fitted with a fixed fire-extinguishing sys-tem.(IACS UI SC48)502 SOLAS Ch.II-2/10.7.2This only applies to ships above 500 gross tonnage engaged inthe carriage of dangerous goods.(IACS UI SC49)503 SOLAS Ch.II-2/10.8 and FSS Code Ch.14.2.3.2.3Port and starboard monitors required by this regulation may belocated in the cargo area as defined in Reg. II-2/3.6, providedthey are aft of cargo tanks and that they protect below and aftof each other.(IACS UI SC169)

H 600 Fire-fighter’s outfits601 SOLAS Ch.II-2/10.10.3Spare charges for breathing apparatus shall be stored in thesame location as the breathing apparatus.(DNV)

I. SOLAS Ch.II-2/11 Structural Integrity

Void

J. SOLAS Ch.II-2/12 Notification of Crew and Passengers

J 100 General requirements101 SOLAS Ch.II-2/12Requirements for internal communication, as given in theRules for Classification of Ships Pt.3 Ch.3 Se.10 apply.(DNV)102 Reference is also given to SOLAS Ch.III/6.4.2 and 6.5.

K. SOLAS Ch.II-2/13 Means of EscapeK 100 Means of escape from control stations, accommo-dation spaces and service spaces101 SOLAS Ch. II-2/13.3.3.1Restricted space or group of spaces in the accommodation:A Restricted space in the accommodation is understood as anormally employed space within an other space, e.g. a smok-er's room at the back of a dining area. For such group of spacesminimum two escape routes are required, see figure 2. Equiv-alent arrangements will be considered.

Figure 2 Minimum two escape routes required

Storage spaces and similar spaces entered only occasionallyare in this context not considered to be normally employed. Forsuch group of spaces minimum one escape route is required,see figure 3.

Figure 3 Minimum one escape route required

Cabins consisting of more than one space need also not be pro-vided with more than one escape route.(DNV)

Dining room

Smoking room

Dining room

Storage space

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102 SOLAS Ch. II-2/13.3.3.2The term "lowest open deck" shall be understood as the lowestfire category 10 area (SOLAS Ch. II-2, Reg. 9.2.3.3.2). Thisapplies regardless of position of accommodation and positionof this open deck (forward / aft). Areas of open deck of insig-nificant area (mooring stations, etc.) can be disregarded.(DNV)103 SOLAS Ch. II-2/13.3.3.3 and .4For spaces above the lowest open deck, DNV may on a case bycase basis accept trunk or ladders to deck above as means ofescape from corridors that otherwise would be considered deadend corridors. This is, however, only accepted if two othermeans of escape according to SOLAS Reg. II-2/13.3.3.3 is ar-ranged from one end of such corridor. A window is howevernot accepted in this regard.(DNV)104 SOLAS Ch. II-2/13.3.3.4A dead end corridor is defined as a corridor or part of a corridorfrom which there is only one escape route.(DNV)

K 200 Means of escape from machinery spaces201 SOLAS Ch. II-2/13.4.2.1Two means of escape is only required from the lowest part ofthe engine room, not from each level.

Guidance note:Where the lower part of the engine room is a space with a heightlower than 2.3 m (standard deck height for L > 125), the twomeans of escape may apply to the first deck with standard deckheight. The two means of escape do not apply to spaces below themachinery floor plating, regardless of height.


(DNV)202 SOLAS Ch. II-2/13.4.2.3For machinery spaces other than those of category A, a singleescape route can be accepted if the space is entered only occa-sionally or if the travel distance from main working and oper-ating positions to door is 5 meters or less. (DNV)

K 300 Means of escape from ro-ro spaces301 SOLAS Ch. II-2/13.6The fore and aft end of the ro-ro space is considered as the areabeing within the distance equal to the breadth (b) of the cargospace from the most forward and aftermost point of the cargospace, see figure 4.

Figure 4 Fore and aft end of ro-ro space

(DNV)

K 400 Emergency Escape Breathing Devices (EEBD)401 SOLAS Ch.II-2/13.3.4The minimum number of EEBDs to be kept within accommo-dation spaces shall be as follows:

— for cargo ships: two (2) EEBDs and one (1) spare EEBD;— for passenger ships carrying not more than 36 passengers:

two (2) EEBDs for each main vertical zone, except thosedefined in the regulation 13.3.4.5, and a total of two (2)spare EEBDs; and

— for passenger ships carrying more than 36 passengers: four (4) EEBDs for each main vertical zone, except thosedefined in the regulation 13.3.4.5, and a total of two (2)spare EEBDs.

402 SOLAS Ch.II-2/13.4.3

1) This interpretation applies to machinery spaces wherecrew are normally employed or may be present on a rou-tine basis.

2) In machinery spaces for category A containing internalcombustion machinery used for main propulsion, EEBDsshall be positioned as follows:

— one (1) EEBD in the engine control room, if locatedwithin the machinery space;

— one (1) EEBD in workshop areas. If there is, however,a direct access to an escape way from the workshop,an EEBD is not required; and

— one (1) EEBD on each deck or platform level near theescape ladder constituting the second means of escapefrom the machinery space (the other means being anenclosed escape trunk or watertight door at the lowerlevel of the space).

Alternatively, different number or location may be deter-mined by the Society taking into consideration the layoutand dimensions or the normal manning of the space.

3) For machinery spaces of category A other than those con-taining internal combustion machinery used for main pro-pulsion, one (1) EEBD shall, as a minimum, be providedon each deck or platform level near the escape ladder con-stituting the second means of escape from the space (theother means being an enclosed escape trunk or watertightdoor at the lower level of the space).

4) For other machinery spaces, the number and location ofEEBDs are to be determined by the Society.

(DNV)

L. SOLAS Ch.II-2/14 Operational Readiness and Maintenance

Void

M. SOLAS Ch.II-2/15 Instructions, Onboard Training and Drills

Void

N. SOLAS Ch.II-2/16 Operations

Void

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O. SOLAS Ch.II-2/17 Alternative Design and Arrangements

Void

P. SOLAS Ch.II-2/18 Helicopter FacilitiesP 100 Helicopter refuelling and hangar facilities101 SOLAS Ch.II-2/18.7.11Where a water spray system is installed as the fire-extinguish-ing system in a hangar, the arrangement shall be in accordancewith the Rules for Classification of Ships Pt. 6 Ch.1 Sec.2G609.A section of fire detectors covering a helicopter hangar, shallnot include fire detectors or manual call points covering ma-chinery spaces of category A.(DNV)

Q. SOLAS Ch.II-2/19 Carriage of Dangerous Goods

Q 100 General101 Requirements are included in the Rules for Classifica-tion of Ships Pt.5 Ch.11.

R. SOLAS Ch.II-2/20 Protection of Vehicle, Special Category and Ro-Ro Spaces

R 100 Precaution against ignition of flammable vapours in closed vehicle spaces, closed ro-ro spaces and special category spaces101 SOLAS Ch.II-2/20.3.1.3

The requirements to indicate any loss of ventilation capacity isconsidered complied with by an alarm on the bridge, initiatedby fall-out of starter relay of fan motor.(IACS UI SC 75)102 SOLAS Ch.II-2/20.3.2All electrical circuits terminating in the cargo holds, that arenot of certified safe type suitable for zone 1, shall be providedwith multipole linked isolating switches situated outside thecargo holds, and accessible only to authorized personnel. Pro-vision shall be made for isolation, and for locking in the off po-sition, of the means of control of such circuits. Emergencyconsumers are not allowed to be disconnected.If electrical circuits of the gas detection system are located inthe cargo hold, the system shall be of the certified safe type(see Ch.8).“No smoking” notices shall be posted in way of all accesses tothese compartments.(DNV)103 SOLAS Ch.II-2/20.3.2.1The electrical equipment shall be of certified safe type suitablefor use in Zone 1 as defined in IEC 79 (Gas Group II A andTemperature class T3).(IACS UI SC 43)104 SOLAS Ch.II-2/20.3.2.2The enclosure for electrical equipment shall be at least of typeIP 55(IACS UI SC 42)105 SOLAS Ch.II-2/20.3.3The electrical equipment shall be of certified safe type suitablefor use in Zone 1 as defined in IEC 79 (Gas Group II A andTemperature class T3).(IACS UI SC 43)

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SECTION 3 SOLAS CH.II-2 AND THE FSS CODE

FIXED GAS FIRE-EXTINGUISHING SYSTEMS

A. General A 100 Application101 This section shall be regarded as the Society’s interpre-tations to the SOLAS Ch. II-2, Reg.10.4 and FSS Code Ch.5.The section shall be considered additional to the requirementsof SOLAS Ch.II-2 and the FSS Code.102 Where considered relevant, the interpretation starts witha reference to the applicable requirement SOLAS or the FSSCode. Where the interpretation is made by IACS, this is indi-cated after the interpretation.

B. Requirements for all Gas Fire-extinguishing Systems

B 100 General requirements101 FSS Code Ch. 5.2.1.1.3Arrangement of bottles shall be such as to provide access forthe necessary checking of fire-extinguishing medium in thecontainers.102 FSS Code Ch. 5.2.1.1.4Unless otherwise specified, the maximum ambient tempera-ture shall be understood as 55°C. Certification of the bottlesshall be carried out according to Rules for Classification ofShips Pt.4 Ch.7 Sec.1 D as for CO2 bottles.103 FSS Code Ch. 5.2.1.3.2For CO2 systems, an automatic time delay unit for the releaseof the extinguishing medium shall be fitted. The time delayunit shall be equipped with an override and signboard describ-ing emergency bypass operating instructions. In the case of anelectric time delay, a dedicated battery (UPS) may be acceptedas an alternative to the override function.Equivalent gas systems (systems designed according to IMOMSC/Circ. 848) need not be provided with a time delay unitwhen the protected space has a gas concentration being belowthe defined LOAEL level of the agent in question (for this pur-pose 52% can be applied for inert gas systems). 104 DNV / IMO Code on Alarms and IndicatorsThe alarm shall be both audible and visual and shall be so lo-cated as to be audible and visual throughout the protectedspace with any machinery operating. The audible alarm shouldbe distinguished from other alarms by adjustment of soundpressure or sound patterns. The visual alarm shall be red as perISO 2412. Cargo handling spaces (cargo pump room and gascompressor rooms) need not to be fitted with visual alarm. Any alarm components installed inside cargo pump room, car-go compressor rooms, paint lockers, battery room (as applica-ble) and similar gas hazardous spaces shall be certified safeaccording to the hazardous area classification in question.Alarms shall be pneumatically or electrically operated. If elec-trically operated, the alarm shall be supplied with power fromthe main and emergency source of electrical power. If pneu-matically operated the alarm shall not be driven by CO2 (norany other agent used as fire extinguishing media). The pneu-matic source shall be available even with a fire in any protectedspace. Any stop valve fitted in the air supply line shall besealed in open position.

105 FSS Code Ch. 5.2.1.3.3Fire-extinguishing media protecting the cargo holds may bestored in a room located forward the cargo holds, but aft of thecollision bulkhead, provided that both the local manual releasemechanism and remote control(s) for the release of the mediaare fitted, and the latter is of robust construction or so protectedas to remain operable in case of fire in the protected spaces.The remote controls shall be placed in the accommodation areain order to facilitate their ready accessibility by the crew. Thecapability to release different quantities of fire-extinguishingmedia into different cargo holds so protected shall be includedin the remote release arrangement. (IACS UI SC 204)The requirement for the release controls applies also in the casewhere the CO2 room is installed aft of cargo area and accom-modation is provided forward of cargo area. (DNV)106 Warning signs shall be provided outside each entranceto all spaces protected with a gas fire extinguishing system.(DNV)107 IMO FSS Code Ch.5.2.2.1Protected spaces can be divided into sections when such spacesare divided by divisions of A0 class and when the spaces haveindependent or adequately separated ventilation systems.Spaces without such divisions and separation shall for the pur-pose of determining quantity of extinguishing agent be consid-ered as one section.(DNV)108 SOLAS Ch. II-2/10.4.3 / IMO FSS Code Ch.5.2Small local systems, like for instance extinguishing systemsfor galley exhaust ducts, small switchboard rooms and paintlockers can be exempted from some of the requirements per-taining to fire extinguishing gas systems. Systems are in thiscontext considered as small local systems if the total amount ofagent is limited (this may for instance be one small CO2 cylin-der for a standard galley or six 45 kg CO2 cylinders inside alarge engine room) and there is in general a short distance be-tween area where the agent is stored, position of release con-trols and entry to the protected space. Small local systems can be stored in position that does notcomply with SOLAS Ch. II-2/10.4.3 when the amount of gasis small compared to the volume of the storage space. The casewhere the gas due to an accident is released into the spacewhere it is stored shall be calculated and the gas concentrationshould in general not exceed 8% CO2 or the NOAEL specifi-cation for the gas in question. Calculations are not required forcabinets located on open deck. The space shall be providedwith mechanical ventilation if located inside accommodationwhile natural ventilation is accepted where the storage spacehas direct entrance from open deck. Storage inside corridorsand staircases shall be avoided. Time delays are not required for small local systems. The re-quirement for discharge alarm and two release controls can bewaived for small local systems when the system is coveringspaces that are normally unmanned (stores, etc.) and when therelease control is located immediately outside the entrance tothe protected space. Discharge alarm and two release controlsare in any case not required for concealed spaces (ventilationducts, scavenge belt, etc.)Piping though accommodation and service spaces will be con-

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http://one.dnv.com:6336/dynaweb/ship/ship0707/@ebt-link;cs=default;ts=default;pt=204573;lang=no?target=%25N%16_285832_START_RESTART_N%25


sidered in each case for small local systems (see IMO FSSCode Ch.5.2.1.3).Special considerations will be made for systems not requiredto be fitted by the regulations.(DNV)109 Pipes serving gas hazardous spaces such as cargo pumproom or cargo compressor rooms can be routed through otherenclosed spaces (machinery spaces, etc.) if the pipes inside theenclosed spaces are:

— connected with full penetration butt welds (flanges orthreaded connections are not accepted for this part)

— the pipe penetration(s) into the gas hazardous space iswelded from both sides

— the pipes inside the enclosed spaces are tightness tested atapproximately 7 bar. Flanges shall be provided outside theenclosed space(s) at locations suitable for testing

For pipes routed though gas hazardous spaces without servingthese, the number of couplings shall be limited and the pipingshall be tightness tested.(DNV)

C. CO2 Fire-Extinguishing Systems

C 100 General requirements101 FSS Code Ch. 5.2.2.1.5 B104With reference to Sec.2 Table A1, calculations according to arecognised standard (NFPA 12, 2005 edition, ISO 6183, 1990edition or equivalent) shall be performed.102 FSS Code Ch. 5.2.2.2Opening of the valves to the pilot cylinders is not regarded asone separate control. There shall be a release box for each pro-tected space in which personnel normally work or to whichthey have access. The space served shall be identified at the re-lease box. These requirements apply for all CO2-systems.The pilot cylinders shall have capacity to operate the systemthree times even under unfavourable temperature conditions. 103 The number of nozzles shall be sufficient to provide aneven distribution of CO2 gas throughout the space. 104 In cases where the CO2 room is readily accessible, onerelease station may be acceptable. One section valve (”controlvalves” as per IMO FSS Code) for each of the protected spacesshall be fitted to the piping system of the total flooding system.The operation of those valves shall be controlled from the po-sition where the CO2 system is released.This shall be arranged, if possible, by interlocking devices onthe control handles, so that any fault in the sequence of opera-tion does not prevent the release of CO2 gas. The section valveshall be manually operable even with maximum CO2 pressureacting on it.105 The CO2 bottle valves shall be of a type which makes itpossible to close the bottles after testing the release systemwithout emptying the CO2 content.106 Bottles shall not contain more than 45 kg of CO2 and theratio of charge shall not exceed 0.67 kg/litre. The company

charging the bottles shall issue a certificate for the ratio ofcharge. Bottles of sizes up to 53.3 kg (80 litre) may be ap-proved case by case based on satisfactory handling arrange-ments. All bottles shall be of the same size. Each CO2 bottleshall be delivered with DNV product certificate according toRules for Classification of Ships Pt.4 Ch.7 Sec.1.107 The connection between the bottle-valve and the mani-fold for the CO2 battery is normally to be flexible high pressurehose of approved type. Other types of connections which areconsidered equivalent (stainless steel tubes) may be accepted.108 Non-return valves shall be fitted between the separatebottles and the manifold, in order that a bottle, if necessary, canbe disconnected from the battery without putting the whole in-stallation out of action. The non-return valve shall be fitted tothe manifold. If the non-return valve is fitted in the upper por-tion of the bottle valve, a notice shall be posted, which clearlyto the manifold, even if the appropriate bottle has been tempo-rarily removed.109 The maximum design pressure for the CO2 bottles andbottle valves shall be 190 bar. All other components, includingcouplings and flanges, in the high pressure side of the system(upstream of section valve) shall be designed to a pressure ofminimum 100 bar (PN 100), whereas all components down-stream of section valve shall have a pressure rating of mini-mum 40 bar (PN40). Minor deviations (+/- 10%) can beaccepted when other recognised standards are applied. Couplings, welded joints and flanges shall be designed andtested in compliance with Rules for Classification of Ships Pt.4Ch.6. In addition to these requirements restrictions will applyto welded and threaded joints as socket and slip-on sleevewelded joints are only accepted downstream of the sectionvalve (the open ended side) whereas threaded joints are onlyaccepted for pipes located inside the protected spaces (all di-mensions) and pipes with external diameter below 20 mm(both upstream and downstream of the section valve). (IACS UR P2 / DNV).110 The CO2 manifold (piping connecting the CO2 cylindersto the section valves) shall be made of steel, or equivalent ma-terial, with the wall thickness of which shall be at least as givenin Table C1. The CO2 manifold shall comply with the require-ments specified in Rules for Classification of Ships Pt.2 Ch.1or other recognised standard (DIN 2448, ISO 9329 part 1 and2, ISO 9330 part 1 and 2), and shall be certified by the Society. 111 In piping sections where valve arrangements introducesections of closed piping, such sections shall be fitted with apressure relief valve and the outlet of the valve shall be led toopen deck.112 All discharge piping, fittings and nozzles in the protect-ed spaces shall be constructed of materials having a meltingtemperature which exceeds 925°C. The piping and associatedequipment shall be adequately supported.113 The section valves shall be of steel or equivalent materi-al and shall comply with PN 100 (nominal pressure). Valvesabove 31 mm (1¼ inch) shall be of flanged type.114 The wall thickness of CO2 pipes fitted between valvesand nozzles is at least to comply with Table C1. Fittings usedto join this part of the CO2 pipes may be of malleable cast ironor nodular cast iron.

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115 The portion of the piping fitted outside the protectedspace shall be protected externally and internally against cor-rosion.116 In order to reduce the pipe resistance, the pipes shall belaid as straight as possible and to follow the shortest way to thenozzles. Connecting pieces shall not be fitted in such a waythat the pipe threads are exposed to corrosion. All pipes intend-ed to carry CO2 shall be free from debris, rust and scale.117 The CO2 piping system shall have a blowing-throughconnection for drying, ventilation and checking purposes. Agauge shall be fitted to the CO2 manifold. 118 Regarding manufacture, workmanship, inspection andtesting of pipes, see Rules for Classification of Ships Pt.4 Ch.6Sec.7. For CO2-manifolds the hydrostatic test pressure may beaccepted as 1.25 times design pressure.119 The CO2 manifold shall be hydrostatically pressure test-ed to at least 1.25 times the relief valve setting, or minimum 125bar prior to installation. The set pressure for the relief valveshall in any case be minimum 100 bar. After installation, theCO2 manifold with all associated components including any re-lease line incorporated in the system shall be pressure tested toat least 50 bar. All piping from section valves to nozzles shallbe tightness tested and inspected with a blow through test.120 A function test of the system shall be carried out to verifycorrect operating of release controls and alarms. The part of thegas distribution piping that runs through accommodation spac-es shall be designed and tested in accordance with IMO FSSCode Ch. 5.2.1.3.1. All other piping shall be tested to ensurethat it is free from obstructions. As far as practicable, the func-tion testing shall be performed in the most realistic manner.

C 200 Fire-extinguishing systems for cargo holds201 The internal diameter of the pipes shall not be less than19 mm. Branch pipes leading to the various nozzles may havean internal diameter of 13 mm. At suitable points, the pipelineshall have facilities for drainage and cleaning.202 All CO2 piping shall be led such that they are as visibleand accessible. The piping to cargo holds are as far as practi-cable to be fitted below the weather deck and shall be laid asstraight as possible. Branch pipes leading to the various noz-zles shall be symmetrically installed. All piping shall be prop-

erly clamped and, where necessary, protected against externaldamage. The number of joints shall be kept to a minimum andall joints shall be of welded or flanged design.

C 300 CO2 high pressure fire-extinguishing systems for machinery spaces, cargo handling spaces and ro-ro spaces301 The diameter of CO2 pipes shall be based on the quantityof CO2 they are intended to carry. The maximum quantity ofCO2 which may be carried through any pipeline is given in Ta-ble C2. The total sectional area of the nozzles in protectedspace shall not be greater than 85% or less than 50% of the to-tal sectional area of the CO2 bottle valves intended for the re-spective rooms. Deviations from the requirements for pipediameters and section area of nozzles table may be acceptedwhen documented by calculations.302 The following CO2 gas concentration should be provid-ed for cargo spaces and cargo handling spaces (calculated atthe entire gross volume):

— 35% for cargo pump rooms in oil carriers (SOLAS Ch.II-2, Reg.10.9)

— 45% for cargo pump rooms in chemicals carriers (IBCCode)

— 45% for ro-ro spaces (SOLAS Ch. II-2, Reg.20.6)— 45% for cargo compressor and cargo pump rooms on liq-

uefied gas carriers (IGC Code).

303 Approximately 90% of the total quantity of CO2 for en-gine room shall be discharged above, and approximately 10%below the floor. Special considerations will be made for spacesof limited volume (typically below 500 m3).

D. Low Pressure CO2 Systems

D 100 General101 Where a low pressure CO2 system is fitted to complywith FSS Code Ch.5.2.2, the following applies:

— The system control devices and the refrigerating plantsshould be located within the same room where the pres-sure vessels are stored.

— The rated amount of liquid carbon dioxide should bestored in vessel(s) under the working pressure in the rangeof 1.8 to 2.2 N/mm2. The normal liquid charge in the con-tainer should be limited to provide sufficient vapour spaceto allow for expansion of the liquid under the maximumstorage temperatures than can be obtained correspondingto the setting of the pressure relief valves but should notexceed 95% of the volumetric capacity of the container.

— Provision should be made for:

Table C1 Minimum wall thickness for steel pipes for fire-extinguishing CO2 pipes External diameter D

(mm) From CO2 bottles to

valves (mm)From valves to nozzles (mm)

21.3 – 26.9 3.2 2.6 30.0 – 48.3 4.0 3.2 51.0 – 60.3 4.5 3.6 63.5 – 76.1 5.0 3.6 82.5 – 88.9 5.6 4.0

101.6 6.3 4.0 108.0 – 114.3 7.1 4.5

127.0 8.0 4.5 133.0 – 139.7 8.0 5.0 152.4 – 168.3 8.8 5.6

Remarks to the table:

1) The external diameter and thicknesses are in accordance with ISO Rec-ommendations R 336 for welded and seamless steel pipes. For pipes covered by other standards, thickness slightly less may be accepted.

2) The minimum wall thickness for larger diameters will be subject to spe-cial consideration.

3) In general, the minimum wall thickness is the nominal wall thickness, and no allowance need be made for negative tolerance and reduction in thickness due to bending.

4) The minimum wall thickness for threaded pipes shall be measured at the bottom of the thread.

Table C2 Maximum quantity of CO2 which may be carried through any pipeline

Maximum quantity of CO2(kg)

Internal diameter of pipeline(mm)

45 13 100 19 135 25 275 32 450 38

1 100 50 2 000 76 3 250 89 4 750 101 6 800 114 9 500 127 15 250 152

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— pressure gauge — high pressure alarm: not more than setting of the relief

valve — low pressure alarm: not less than 1.8 N/mm2 — branch pipes with stop valves for filling the vessel — discharge pipes — liquid CO2 level indicator, fitted on the vessel(s) — two safety valves.

— The two safety relief valves should be arranged so that ei-ther valve can be shut off while the other is connected tothe vessel. The setting of the relief valves should not beless than 1.1 times working pressure. The capacity of eachvalve should be such that the vapours generated under firecondition can be discharged with a pressure rise not morethan 20% above the setting pressure. The discharge fromthe safety valves should be led to the open.

— The vessel(s) and outgoing pipes permanently filled withcarbon dioxide should have thermal insulation preventingthe operation of the safety valve in 24 hours after de-ener-gizing the plant, at ambient temperature of 45°C and an in-itial pressure equal to the starting pressure of therefrigeration unit.

— The vessel(s) should be serviced by two automated com-pletely independent refrigerating units solely intended forthis purpose, each comprising a compressor and the rele-vant prime mover, evaporator and condenser.

— The refrigerating capacity and the automatic control ofeach unit should be so as to maintain the required temper-ature under conditions of continuous operation during 24hours at sea temperatures up to 32°C and ambient air tem-peratures up to 45°C.

— Each electric refrigerating unit should be supplied fromthe main switchboard busbars by a separate feeder.

— Cooling water supply to the refrigerating plant (where re-quired) should be provided from at least two circulatingpumps one of which being used as a stand-by. The stand-by pump may be a pump used for other services so long asits use for cooling would not interfere with any other es-sential service of the ship. Cooling water should be takenfrom not less than two sea connections, preferably one portand one starboard.

— Safety relief devices should be provided in each section ofpipe that may be isolated by block valves and in whichthere could be a build-up of pressure in excess of the de-sign pressure of any of the components.

— The piping system should be designed in such a way thatthe CO2 pressure at the nozzles should not be less than1 N/mm2.

— Audible and visual alarms should be given in a centralcontrol station when:

— the pressure in the vessel(s) reaches the low and highvalues according to 2

— any one of the refrigerating units fails to operate — the lowest permissible level of the liquid in the vessels

is reached.

— If the system serves more than one space, means for con-trol of discharge quantities of CO2 should be provided, e.g.automatic timer or accurate level indicators located at thecontrol position(s).

— If a device is provided which automatically regulates thedischarge of the rated quantity of carbon dioxide into theprotected spaces, it should be also possible to regulate thedischarge manually.

(IACS UI SC 170)102 The alarms required by 101, item 12 should be given ina continuously manned control station.103 The refrigerating plant shall comply with the require-ments given in Rules for Classification of Ships Pt.5 Ch.10 to

the extent these are applicable.The refrigerating capacity and the automatic control of each unitshall be so as to maintain the required temperature under condi-tions of continuous operation during 24 hours at the sea temper-ature up to 32°C and ambient air temperature up to 45°C. In the event of failure of either one of the refrigerating units,the other shall be actuated automatically. Provision shall bemade for local manual control of the refrigerating plant.104 The pipes, valves and fittings shall be in accordancewith the requirements of the Society for a design pressure notless than the design pressure of the CO2 vessels.

D 200 Testing201 The pipes, valves and fittings and assembled systemsshall be tested to the satisfaction of the Society.202 In particular, the pipes from the vessel(s) to the releasevalves on the distribution manifold shall be submitted to hy-draulic test at pressure 1.5 times the design pressure.203 All piping, after having been assembled on board, shallbe tested for tightness and free flow of the CO2.204 The refrigerating plant, after having been fitted onboard, shall be checked for its proper operation.205 At judgment of the Society, a discharge test may be re-quired.

E. Equivalent Fixed Gas Fire Extinguishing Systems

E 100 General requirements101 Equivalent fixed fire extinguishing system shall complywith IMO MSC/Circ. 848, as amended in addition to part Aand B of this appendix. 102 Equivalent fixed gas fire extinguishing systems may beaccepted for use in other spaces, like switchboard rooms andcargo handling spaces. A higher gas concentration will in gen-eral be required for cargo handling spaces, in particular thosehandling methane. 103 For the purpose of calculating the quantity of extinguish-ing agent and the actual concentration based on net volume (forNOAEL and LOAEL verification), an ambient temperature forthe protected space of 20 degree C may be applied. 104 Components of the gas extinguishing system shall com-ply with Rules for Classification of Ships Pt.4 Ch.1 to Pt.4Ch.10 with pressure rating according to design pressure docu-mented by maker. However, the NFPA 2001 may be applied asdesign standard for piping and couplings inside the protectedspace.105 Cylinders (agent containers) shall not contain more than81 Litre of agent. Larger cylinders may be approved case bycase based on satisfactory handling arrangements. All bottlesshall be of the same size. Each cylinder shall be delivered withDNV product certificate according to Rules for Classificationof Ships Pt.4 Ch.7 Sec.1.106 IMO MSC/Circ. 848, 11Agent containers stored in a protected space shall be distribut-ed throughout the space with bottles or groups of bottles locat-ed in at least six separate locations. Duplicate power releaselines shall be arranged to release all bottles simultaneously. The release lines shall be so arranged that in the event of dam-age to any power release line, five sixth of the fire extinguish-ing gas can still be discharged. The bottle valves areconsidered to be part of the release lines and a single failureshall include also failure of the bottle valve.For systems that need less than six cylinders (using the small-est bottles available), the total amount of extinguishing gas onthe bottles shall be such that in the event of a single failure to

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one of the release lines (including bottle valve), five sixth ofthe fire extinguishing gas can still be discharged. This may beachieved by for instance using more extinguishing gas than re-quired so that if one bottle is not discharging due to a singlefault, the remaining bottles will discharge the minimum fivesixth of the required amount of gas. This can be achieved withminimum two bottles. However, NOAEL values calculated atthe highest expected engine room temperature are not to be ex-ceeded when discharging the total amount of extinguishing gassimultaneously.

Systems that can not comply with the above, for instance sys-tems using only one bottle located inside the protected space,can not be accepted. Such systems shall be designed with thebottle(s) located outside the protected space, in a dedicatedroom in compliance with SOLAS Reg.II-2/10.4.3.(IACS UI SC 200)

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SECTION 4 SOLAS CH.II-2 AND THE FSS CODE, HIGH EXPANSION AND INSIDE AIR

FOAM SYSTEMS

A. GeneralA 100 Application 101 Any fixed foam fire-extinguishing system shall complywith the requirements of IMO FSS Code Ch.6. Systems formachinery spaces and cargo pump rooms shall also complywith A100 to A600, whereas systems for ro-ro spaces shall inaddition to the IMO FSS Code comply with A100 to A500 andA700. 102 Air intakes and sea water intakes shall comply with ap-plicable requirements for load line. Approvals for foam con-centrate, foam filling rate and capacity, operation of dampersand similar are defined by the IMO FSS Code. 103 An operation manual, describing standard release proce-dures as well as procedures in case of failure of essential com-ponents shall be available on board. The manual shall alsoidentify which hatches, dampers and similar devices that arerequired to be opened when the system is operating. Releaseprocedures (standard and failure) shall be listed on signboardsat the release stations. 104 Manuals defining in detail maker’s recommended main-tenance and test procedures shall be available on board.105 All systems not complying with IMO FSS Code require-ments for location and accessibility of foam generators are forthe purpose of these rules defined as inside air foam systems.These systems can also be approved under these rules on a caseby case basis. Any inside air foam system shall be type ap-proved by the Society. The foam production rate, total foamliquid capacity and location of generators are subject to specialconsiderations, see the system’s type approval certificate.

A 200 Definitions201 Foam: the extinguishing medium produced when foamsolution passes through a foam generator and is mixed with air.202 Foam solution (premix): a solution of foam concentrateand water.203 Foam concentrate: the liquid which, when mixed withwater in the appropriate concentration forms a foam solution.204 Foam generators: discharge devices or assembliesthrough which foam solution is aerated to form foam that isdischarged directly into the protected space, typically consist-ing of a nozzle or set of nozzles and a casing. The casing is typ-ically made of perforated steel / stainless steel plates shapedinto a box that enclose the nozzle(s).205 Foam inductor: mixing unit which does not need a ded-icated foam pump in order to mix the foam concentrate into thewater (typically within +30% /-0% of nominal mixing rate). 206 Foam proportioner: mixing unit which need a foampump in order to mix the foam concentrate into the water (typ-ically within +30% /-0% of nominal mixing rate).

A 300 Water and foam concentrate supply systems301 The water supply pump shall comply with requirementsof Sec.2 H106 for arrangement of pump unless the water issupplied from a tank with a guaranteed quantity correspondingto the maximum required foam production. The emergencyfire pump can be used as supply pump provided that 25 m3/hat required pressure is dedicated for fire hose purposes and thusnot included in the foam production capacity calculations.302 The foam concentrate shall be stored in a special tankand fed to the foam generator by a suitable system, which shall

be permanently adjusted for consumption of seawater or fresh-water, as applicable. The tank for the foam concentrate shall beprotected against inside corrosion and shall be suitable for stor-age of the intended foam concentrate. Means of measuring liq-uid level shall be provided. 303 Pressure gauges shall be fitted at both inlets (water sup-ply and foam concentrations) and the outlet of the foam pro-portioner.304 Piping and components coming into direct contact withthe foam concentrate shall be made of corrosion resistant ma-terials such as CuNi, stainless steel or marine bronze. Galva-nised steel or equivalent is accepted for other piping.305 For testing and drying purposes the piping system shallbe fitted with connection for blowing through with compressedair. 306 The water supply pumps (regardless of size) and foamconcentrate pumps with capacity exceeding 25 m3 / h (meas-ured at 10 bar) shall be delivered with DNV product certificate.Foam concentrate pumps with lower capacity shall be deliv-ered with certificate issued by the maker (work certificate).

A 400 Foam generating components and foam genera-tor room401 The high-expansion foam generating components (noz-zles, mesh and any fans, etc.) shall be of approved type, basedon a realistic full scale test. The foam concentrate shall be type approved by the Society inaddition to being mentioned on the type approval certificate forthe high expansion or inside air foam system in question. Thefoam proportioner / inductor shall be type approved by the So-ciety. The foam concentrate shall in general be supplied throughfoam pump(s) and foam proportioner(s). Foam inductors willonly be accepted when it can be documented that the entiresystem can work at a wide range of foam concentrate mixingratios.402 All components in the foam generating system shall bemade of corrosion resistant materials such as CuNi or marinebronze. Stainless steel may be accepted for parts exposed tofoam or seawater only when the system is operating, providedthat a suitable flushing system is installed. The material andcoating (if applicable) of the foam concentrate storage tankshall comply with the limitation stated in the type approval cer-tificate issued by the Society and maker's specification for thisparticular concentrate.403 The foam generating nozzles or meshes shall be made ofa durable, non-shrinking material that is rot- and heat-resistant.These foam nozzles or meshes are also to have as large open-ings as possible. The nozzles shall be so constructed that theyhave the least possible chance of getting clogged.404 All electrical components in connection with the foamgenerating components shall have at least IP54 rating.405 The foam generator shall be supplied with a special airintake dimensioned according to the air consumption of thegenerator.406 All foam generators shall be fitted with a damper asspecified by the IMO FSS Code Ch.6, 2.2.2.2. The dampershall, in addition to protection of the generator, prevent mal-function of the generator due to updraft of fumes in the distri-bution ducts from a fire in protected space. A manual releaseof the damper is also to be arranged.

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407 The arrangement of the foam generator shall permit test-ing of the foam production without leading the expanded foamto the rooms to be protected, e.g. by providing means that per-mit foam to pass overboard or to open deck.For both high expansion and inside air systems two test valvescapable of being connected to fire hoses shall be installed onthe distribution piping downstream the proportioner / inductor.One valve is for connecting a foam generator in an alternativelocation for the purpose of testing satisfactory foam produc-tion, the other valve shall be used in order to maintain realisticpressure and flow through the proportioner during testing.Both valves may be used to direct water to outside the protect-ed space when function testing the proportioner.408 The foam generating components shall be so constructedand assembled that maintenance and replacement of essentialparts can easily be effected. The system shall be so arrangedthat nozzles and pipes can easily be rinsed and drained.409 The foam generating components shall be placed in aspecial room, which is separated from all the rooms to be pro-tected. Safe and readily available access to this foam generatorroom and to the water and foam pumps shall be ensured evenin case of fire in any of the protected spaces. 410 The foam generator room shall have a heating systemwhich can keep the room permanently free from frost and me-chanical ventilation for overpressure.411 Bulkheads and decks in the foam generator room that arecontiguous to the rooms to be protected, shall have A-60 rat-ing.

A 500 System arrangement501 All components in the foam system shall be permanentlyinstalled and ready for immediate use.502 The ducts leading from the generators to the rooms thatare protected, shall be made of steel, or equivalent fire resistantmaterials. They shall be dimensioned, stiffened and fastenedsuch that they can withstand the normal mechanical and ther-mal strain they may be exposed to. Requirements for duct ar-rangement are given under the subsection for machineryspaces and cargo pump rooms and the subsection for ro-rospaces.503 The arrangement of the protected spaces shall be suchthat any possible overpressure in the space (caused by fire) canbe relieved as the room is being filled with foam. 504 The sources of power supply for the foam generatingcomponents, including water and foam pumps, etc. shall besupplied independently of any machinery or electrical installa-tions located in the rooms to be protected.505 Failure of single components, except emergency gener-ator, water and foam pumps and piping, shall not prevent op-eration of the system. All valves shall be accessible and of atype that can be operated also manually (directly on stem orequivalent). Dampers need not to be readily accessible if thecontrol arrangement is of a robust design (dedicated accumu-lators needed for pneumatic systems) and several independentdampers and foam generators serve that space. A space shallnormally not be served by only one generator. All componentsshall be able to operate even in case the control system fails. 506 The system shall be designed to produce foam at re-quired rate within 1 minute from release (time to start emer-gency generator need not to be included in the 1 minute test). 507 The system may be divided into sections that may be re-leased in sequence. The capacity and design of the entire sys-tem shall be based on the protected space demanding thegreatest volume of foam. Two protected spaces need not to beserved simultaneously when the boundaries between thesespaces are of A-class standard.

A 600 Arrangement for machinery spaces and cargo pump rooms601 The high expansion foam shall be distributed to the re-spective rooms by means of ducts. The ducts shall be dimen-sioned according to the size of the foam generator's outlet, andshall be so located that an even distribution of foam is obtainedthroughout the room to be protected. As a minimum, the ducts shall for the main engine rooms beled to the lower part of the casing and shall provide unobstruct-ed access to the main and auxiliary engines from the duct out-let. Adjacent spaces being fully or partially separated from theengine room (workshop, separator room, etc.) shall have sepa-rate ducts. 602 A one meter per minute discharge rate is defined by theIMO FSS Code. This shall be calculated with respect to maxi-mum horizontal area of the room, without reduction for en-gines, boilers, loose tanks, etc.603 The foam production capacity is also to be sufficient tofill the whole room (entire volume enclosed by A-class bound-aries) to the level of the main deck in the course of maximum10 minutes.604 The system shall also cover the lower part of the casingand in all cases the highest risk object in casing (for instanceboiler).605 Where a cargo pump room is covered by a foam system,the foam concentrate shall be approved for use with the cargobeing carried

A 700 Arrangement for ro-ro spaces701 The high expansion foam shall be distributed to the re-spective rooms by means of ducts. The ducts shall be dimen-sioned according to the size of the foam generator's outlet, andshall be so located that an even distribution of foam is obtainedthroughout the room to be protected. 702 The layout shall take into consideration obstructions thatcan be expected when cargo are on board. As a minimum, ductshall be led to every second deck, including movable decks.The horizontal spacing of ducts shall ensure rapid supply offoam to all parts of the protected space. This will be consideredcase by case based on any full scale test undertaken by themanufacturer. 703 The foam production capacity shall be sufficient to fillthe whole room (entire volume enclosed by A-class bounda-ries) in the course of maximum 10 minutes.

A 800 Testing of high expansion and inside air system801 The pipes, valves and fittings and assembled systemsshall be tested to the satisfaction of the Society.802 All distribution piping shall be blown through with air toensure that the piping is free from obstructions803 Function testing of the foam proportioner / inductorshall be performed. The mixing ratio shall be measured and bewithin the nominal mixing ratio defined by the type approvalcertificates (typically +30% /-0%). For foam proportioners us-ing foam concentrates of Newtonian type with kinematic vis-cosity equal to or less than 100cSt @ 0°C and density equal toor less than 1.1 kg/dm3 this test can be performed with waterinstead of foam concentrate. In case of non-Newtonian foamconcentrates and concentrates with kinematic viscosity ex-ceeding 100 cSt. @ 0°C or density above 1.1 kg/dm3 the func-tion test shall be performed with the actual foam concentrate.All foam inductors shall be function tested with the actualfoam concentrate, regardless of foam type.804 Function testing of at least one foam generator usingfoam concentrate mixed to water or seawater shall be per-formed. The system's ability to produce foam of acceptablequality shall be verified in the most realistic manner beingpracticable. This test can be done either inside the protected

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space or by moving one of the generators to an alternative lo-cation (e.g. open deck). The test flow should be higher than theminimum accepted flow for the foam proportioner / inductor.Test valves as required by A307 may be used. This require-ment may only be waived when an exception is specificallystated on the system's type approval certificate issued by the

Society (based on extensive documentation, prototype testingand measurements on each ship). 805 Function testing of the power and control systems, waterpump(s), foam pumps(s), valves, remote and local releases sta-tions and alarms shall also be performed.

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SECTION 5 SOLAS CH.III AND LSA CODE, LIFESAVING ARRANGEMENT

A. General

A 100 Application101 This section describes how the Society will act with re-spect to lifesaving appliances and arrangements when the flagadministration has authorised the Society to issue the SOLASSafety Certificates for cargo ships above 500 GT and for pas-senger ships.102 For non-propelled vessels or cargo ships below 500 GTIACS Internal Guidelines No.2 or national requirements maybe applied for issuance of safety certificates. For such units, anMO will be issued identifying the standard applied.

A 200 Scope201 All requirements in the SOLAS 1974 Ch.III as amendedand Ch.V Reg. 23 as amended are considered as part of the So-ciety's scope. 202 The requirements in C to F shall be regarded as supple-mentary to those in A201.203 Where IACS has issued Unified Interpretations (UI) re-lating to SOLAS Ch.III or Ch.V Reg. 23 such UI will normallybe regarded as part of the SOLAS Ch.III and Ch.V Reg. 23 andthereby the Society's scope. A list of relevant IACS documentsis presented in G.204 When the flag administration has expressed require-ments in excess of or contradictory to the requirements inA203 or C to F, the flag administration requirements shall pre-vail.205 Where IMO has issued interpretations to SOLAS Ch.IIIor Ch.V Reg. 23 in the form of MSC/Circulars, such interpre-tations will normally be regarded as part of the SOLAS Ch.IIIand Ch.V Reg. 23 and thereby the Society's scope.

B. Documentation

B 100 Documentation for approval101 Drawings according to Rules for Classification of ShipsPt.0 Ch.3, G050, G160 and G170 shall be submitted for ap-proval.

C. Passenger ships and cargo ships

C 100 General101 This section contains:

— DNV Clarifications— IACS Unified Interpretations in italics.

102 National interpretations from the different flag authori-ties are not covered.103 Guidance notes are also used in this section to providenecessary explanation or information that is not part of a clar-ification.104 In the following sub-sections the regulation numbers inbrackets refer to SOLAS or LSA-Code. The requirements list-ed under each sub-section refer to SOLAS regulations or theLSA-Code sections.

C 200 Suez Canal crew201 Suez Canal crew is considered as transit crew on a do-mestic voyage, and shall not be included in the total number ofpersons on board for which lifesaving appliances are provided.

C 300 Personal life-saving appliances (SOLAS Ch.III, Regulation 7)301 The number of lifejackets for people on watch shall beminimum 2 in the engine control room and 2 in the wheel-house. 302 On each side of the ship, there shall be a minimum ofone lifebuoy with an attached line. No lifebuoy light or lifebu-oy smoke signal shall be attached to this lifebuoy. These life-buoys may be part of the total amount of life-saving appliancesas described in SOLAS Ch.III, Reg. 22 and 32.303 The three immersion suits for the rescue boat crew maybe regarded as part of the number of suits provided for the totalnumber of persons on board for which lifesaving appliances isprovided. This provided that the rescue boat crew are able tomeet the requirement for 5 minutes preparation time includingto pick up the suits from where they are stowed. Immersionsuites in locked cabins are considered not applicable for thispurpose.304 All immersion suits approved to be worn with approvedlifejacket shall be stowed together with a lifejacket.

Guidance note:For free-fall lifeboats inflatable lifejackets is strongly recommended.


305 Warm climates are considered between 30° North and30° South, or according to MSC/Circ.1046.

C 400 Survival craft muster and embarkation arrange-ments (SOLAS Ch.III, Regulation 11)401 If the embarkation ladders are not installed adjacent toany non-davit launched liferaft, means shall be provided to en-sure that the liferaft painter can be easily transferred from thestowage location to the embarkation position. 402 For passenger vessels, descent units are accepted as re-placement for embarkation ladders provided that:

a) The number of descent units is the same as for embarka-tion ladders. Embarkation ladder or descent-unit shall beprovided at each launching station or at every two adjacentembarkation stations. At least one embarkation laddershall be provided on each side of the vessel in addition tothe descent units

b) The descent units are able to reach the waterline from thedeck at a trim of up to 10°, and a list of up to 20° either wayin the lightest seagoing condition.

c) There are openings in the rails (70 - 80 cm wide) to avoidthat persons need to climb over the rail before descending

d) The fixing of the eyebolt is found acceptable by the attend-ing surveyor.

e) The various components transferring the load e.g. supportarms, hooks, links, shackles, wires etc. shall be madeaccording to recognised standards, with a minimum safetyfactor of at least 6, and are delivered with documentationfor grade of material and testing. The units shall bestamped with SWL.

f) The support arms have sufficient structural support in thepillars

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g) Adequate onboard testing is carried out in the presence ofattending DNV surveyor and the testing is to his/her satis-faction

h) One embarkation ladder is provided on each side of thevessel in addition to the descent units.

403 For liferafts required in SOLAS Ch.III, Reg. 31.4 (dis-tance to nearest survival craft >100 m) a knotted rope or de-scent unit is acceptable as ‘other means of embarkation’. Aknotted rope is not acceptable for launching deck above 10 min the lightest seagoing condition.

C 500 Stowage of survival craft (SOLAS Ch.III, Regula-tion 13)501 On cargo vessels of 80m in length and upwards but lessthan 120m in length, the aft part of each davit launched liferaftshall be minimum 4m forward of the vessel’s propeller. Oncargo vessels of 120m in length and upwards and passengervessels of 80m in length and upwards, the aft part of each davitlaunched liferaft shall be minimum 6 m forward of the vessel’spropeller.502 Liferafts shall not be stowed directly above any embar-kation station.

C 600 Survival craft launching and recovery arrange-ments (SOLAS Ch.III, Regulation 16)601 The launching arrangement shall be designed so that thesurvival craft can be launched without having to be pushed out-side the deck edge when the vessel is unfavourably heeled 20°.602 Lifelines for partially enclosed lifeboats shall be of 20mm to 24 mm diameter good quality manila rope or syntheticrope of equivalent strength. Property of grip is essential andcare shall be taken to ensure that the ropes are suitable for thepurpose. Grip properties of synthetic rope, if used, shall becomparable with manila.

C 700 Rescue boat embarkation, launching and recov-ery arrangements (SOLAS Ch.III, Regulation 17)701 The launching arrangement shall be designed so that therescue boat can be launched without having to be pushed out-side the deck edge when the vessel is unfavourably heeled 20°.702 The aft part of the rescue boat shall be minimum 4m for-ward of the vessel’s propeller.703 Securing point shall be provided for the painter neces-sary to enabling launching of the rescue boats when the vesselis at 5 knots headway. The location of such securing pointsshall be suitable to assure an angle less than 45° between paint-er and horizontal and to avoid disturbance from bow-wave.704 When hull shape, painter securing point, davit type andrescue boat type is identical on sister vessels, documentation ofthe testing according to IMO Res.81(70), Part 2, 5.4 may bebased on the first vessel in the series.705 Foul weather recovery strops shall be dimensioned witha safety factor of 6 for the weight of fully loaded and equippedrescue boat.

C 800 Pilot ladder arrangements (SOLAS Ch.V, Regu-lation 23)801 ISO-standard 799-1986 for pilot ladders, 5488-1979 foraccommodation ladders and 7364-1983 for accommodationladder winches are regarded as relevant standards for pilot lad-der arrangements.

D. Passenger ships (additional requirements)D 100 Survival craft and rescue boats (SOLAS Ch.III, Regulation 21)101 More than four davit launched liferafts assigned to onedavit are in general not acceptable on passenger ships. Howev-er, if the installation test in IMO Res. MSC.81(70), part 2, item6.2.6 shows that more than 4 life rafts are possible to launchwithin the 30 minutes evacuation time, more rafts are accepta-ble.

D 200 Personal life-saving appliances (SOLAS Ch.III, Regulation 22)201 Lifebuoys located inside, or at pilot stations shall not beincluded in minimum required number nor in the number oflifebuoys with light. 202 For vessels where lifejackets are stowed in cabins morethan two decks below or above the muster stations, additionallifejackets shall be provided corresponding to the number ofpersons berthed within the most populated main vertical zone(MVZ). However, if the number of passengers berthed ondecks more than two decks below or above the muster stationsare more than the number within the most populated MVZ,then additional lifejackets corresponding to this number mustbe provided.

D 300 Additional requirements for ro-ro passenger ships (SOLAS Ch.III, Regulation 26)301 In Ro-Ro passenger vessels every fourth life raft shallcontain a Search And Rescue Transponder (SART). Thatmeans, if the vessel has 1-4 rafts, 1 SART is required. If thevessel has 5-8 rafts, it will require 2 SARTs and further. In thisrespect the spare rafts are included.302 The SART referred to in 301 shall be kept inside the raftequipment pack. 303 The rafts referred to in 301 shall have fastening devicefor the SART including antenna at least 1m above water level. 304 The SART referred to in 301 shall be mounted and serv-iced by a specialist firm. SARTs in wheel-marked rafts shallalso be wheel-marked.

E. Cargo ships (additional requirements)E 100 Survival craft and rescue boats (SOLAS Ch.III, Regulation 31)101 A liferaft is considered easy side-to-side transferableonly on a single open deck level on a flat surface without ob-structions. Such liferaft shall have a weight less than 185 kgand not be certified for more than 25 persons. Transfer viastairs, doors or a corridor is not considered easy.102 A davit used for both the rescue boat and the survivalcraft is only acceptable if the crew members normally assignedto the life raft stations demonstrate that:

— the different requirements for the release hooks for the sur-vival craft and for the rescue boat are met

— the stowage requirements of SOLAS Ch.III, Reg. 13.1.1,13.1.3, 14.1, 14.3 and 31.1.5 are met

— all survival craft and rescue boat the launching applianceis intending to serve can be launched by gravity or storedmechanical power

Guidance note:The release hook requirement may for instance be met by the useof two hooks in a triangle suspension.


103 More than two davit launched liferafts assigned to one

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davit are not acceptable on cargo vessels. However, if the in-stallation test in IMO Res. MSC.81(70), part 2, item 6.2.6shows that more than two life rafts are possible to launch with-in the 10 minutes evacuation time, more than two rafts are ac-ceptable.104 A free-fall lifeboat shall not be accepted as rescue boat.105 Arrangement according to SOLAS Ch.III, Reg..31.1.3 isnot acceptable for well stimulation vessels.

E 200 Personal life-saving appliances (SOLAS Ch.III, Regulation 32)201 The number of immersion suits for people on watchshall be minimum 2 in the engine control room and 2 in thewheelhouse. 202 Lifebuoys located inside, or at pilot stations shall not beincluded in the minimum required number nor in the numberof lifebuoys with light.

E 300 Survival craft embarkation and launching arrangements (SOLAS Ch.III, Regulation 33)301 Securing point shall be provided for the painter neces-sary to enabling launching of the lifeboats on board vesselswith GT 20 000 and upwards when the vessel is at 5 knotsheadway speed. The location of such securing points shall besuitable to assure an angle less than 45° between painter andhorizontal and to avoid disturbance from bow-wave.

F. Life-saving appliances and arrangements requirements

F 100 Free-fall lifeboats (LSA-Code Ch.IV, Regulation 4.7)101 The free-fall certification height is generally consideredas the height from the still water surface to the lowest point ofthe lifeboat in its launched configuration when the vessel is inits lightest seagoing condition without list or trim. However,for oil tankers, chemical tankers and gas carriers, item 4.7.3.2of the LSA Code will apply.

F 200 Launching and embarkation appliances (LSA-Code Ch.VI)201 The efficient hand gear for launching appliance for res-cue boat shall be dimensioned for recovery of the rescue boatwith full complement of persons and equipment.

G. ReferencesG 100 IACS Unified Interpretations (UI)101 Documents regarding SOLAS Ch.III and V/23 issued byIACS:

— UI SC 143 Stowage of Marine Evacuation Systems— UI SC 213 Arrangements for remotely located survival

craft— UI SC 215 Embarkation ladder

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SECTION 6 SOLAS CH.IX - ISM CODE

A. ISM Code Reg. 5.1.5A 100 Master’s review101 The master’s review of the SMS shall be carried out atleast annually and documented.

B. ISM Code Reg. 12.1B 100 Annual internal audits101 Annual internal audits shall be carried out in 3 months +/- window from the anniversary date set by the company.

C. ISM Code Reg. 12.2C 100 Management review101 Management review shall be carried out at least annual-ly and documented.

D. ISM Code - Revised Guidelines on implementation of the ISM Code by

AdministrationsD 100 Resolution A.913(22) – 3.2101 The company shall possess a Full Term DOC for thevessel type, before an initial audit on that vessel type can becarried out.

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SECTION 7 SOLAS CH.XI-2 - MARITIME SECURITY

A. GeneralA 100 Regulation 6 - Ship Security Alert System101 All SSAS (Ship Security Alert System) installations

shall be either type or case approved. Onboard verificationshall not be replaced by an approval or acceptance document,especially with regard to the subsequent installation and oper-ational performance features of the onboard system.

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SECTION 8 INTERNATIONAL CODE FOR THE CONSTRUCTION AND EQUIPMENT OF

SHIPS CARRYING LIQUEFIED GASES IN BULK - IGC CODE

A. GeneralA 100 Application101 The following interpretation relates to Pt.5 Ch.5 Sec.14,given as a guidance note under A102. 102 This section shall be regarded as the Society's interpre-tation of the IGC Code.103 Each interpretation starts with a reference to applicabletechnical requirements of the IGC Code. Following the inter-pretation text, reference is made to applicable IACS interpre-tations. For interpretations made by the Society, this is soindicated with "(DNV)".

B. IGC Code [Chapter 4] - Cargo ContainmentB 100 Construction and testing101 IGC Code 4.10.14.Examination before and after the first loaded voyage.The requirements apply to all vessels carrying liquefied naturalgases (LNG) in bulk which have satisfactorily completed gastrials.102 Survey requirements at first loading, preferably at thelatter stage:

a) Review cargo logs and alarm reports.b) Witness satisfactory operation of the following:

— Gas detection system— Cargo control and monitoring systems such as level

gauging equipment temperature sensors pressuregauges, cargo pumps and compressors, proper controlof cargo heat exchangers, if operating, etc.

— Nitrogen generating plant or inert gas generator, if op-erating

— Nitrogen pressure control system for insulation, inter-barrier, and annular spaces, as applicable

— Cofferdam heating system, if in operation— Reliquefaction plant, if fitted— Equipment fitted for the burning of cargo vapours

such as boilers, engines, gas combustion units, etc., ifoperating.

c) Examination of on-deck cargo piping systems includingexpansion and supporting arrangements.

d) Witness topping off process for cargo tanks including highlevel alarms activated during normal loading.

e) Advise master to carry out cold spot examination of thehull and external insulation during transit voyage to un-loading port.

103 Survey requirements at first unloading, preferably at thecommencement:

a) Witness emergency shutdown system testing prior to com-mencement of unloading.

b) Review cargo logs and alarm reports.c) Witness satisfactory operation of the following:

— Gas detection system— Cargo control and monitoring systems such as level

gauging equipment, temperature sensors, pressuregauges, cargo pumps and compressors, proper controlof cargo heat exchangers, if operating, etc.

— Nitrogen generating plant or inert gas generator, if op-erating

— Nitrogen pressure control system for insulation, inter-barrier, and annular spaces, as applicable

— On membrane vessels, verify that the readings of thecofferdam and inner hull temperature sensors are notbelow the allowable temperature for the selectedgrade of steel. Review previous readings

— Cofferdam heating system, if in operation— Reliquefaction plant and review of records from pre-

vious voyage— Equipment fitted for the burning of cargo vapours

such as boilers, engines, gas combustion units, etc., ifoperating.

d) Examination of on-deck cargo piping systems includingexpansion and supporting arrangements.

e) Obtain written statement from the Master that the coldspot examination was carried out during the transit voyageand found satisfactory. Where possible, the surveyor shallexamine selected spaces.

(IACS UI GC 13)

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