res17e fpso 2008

Rules for the Classification of Floating Units intended for Production, Storage and Off-loading of Liquid Hydrocarbons or intended for Storage, Off-loading and Regasification of Liquefied GasesEffective from 1 January 2008

RINA S.p.A.Via Corsica, 12 - 16128 Genova - ItalyTel. +39 01053851 - Fax: +39 0105351000E-MAIL [email protected] - WEB www.rina.orgC.F./P.Iva 03794120109Cap. Soc. EURO 30.192.800,00 i.v.R.I. Genova N. 03794120109

Editor: Marcello Lucentini

Editorial office: RINA S.p.A. Via Corsica, 12 - 16128 GENOVA Tel. +39 010 53851

Printed by: Algraphy S.n.c. Genova - Italy

Publication registered under No. 25/73 of 11 April 1973

Court of Genova

© RINA S.p.A. - All rights reserved

PREAMBLE TO THE RULES: GENERAL CONDITIONS

Definitions:“Rules” means the Rules for the Classification of Shipswhether contained herein or in other documents issued bythe Society.“Services” means the activities described in article 1 below,rendered by the Society upon request made by or on behalfof the Interested Party.“Society” or “RINA” means RINA S.p.A. and any other Companypertaining to the RINA Group which provides the Services.“Surveyor” means technical staff acting on behalf of theSociety in the performance of the services described in Arti-cle 1 below.“Interested Party” means a party, other than the Society, hav-ing responsibility for the classification of the ship, such asthe Owner of the ship and his representatives, or the shipbuilder, or the engine builder, or the supplier of parts to betested.“Owner” means the Registered Owner or the DisponentOwner or the Manager or any other party with the responsi-bility to keep the ship seaworthy, having particular regard tothe provisions relating to the maintenance of class laiddown in Part A, Chapter 2 of the Rules.“Administration” means the Government of the State whoseflag the ship is entitled to fly or the State under whoseauthority the ship is operating in the specific case.

Article 11.1. - The purpose of the Society is, among others, the clas-sification and certification of vessels, sea and river units, off-shore structures and craft of all kinds (collectively referredto hereafter as “ships”), and certification of their parts andcomponents.The Society:- sets forth and develops Rules, Guidance Notes and otherdocuments;- publishes the Register of Ships;- issues Certificates, Statements and Reports based on itssurvey activities.1.2. - The Society also takes part in the implementation ofNational Regulations as well as International Rules andStandards, by delegation from different Governments.1.3. – The Society carries out Technical Assistance onrequest and provides special services outside the scope ofclassification, which are regulated by these general condi-tions, unless expressly derogated.

Article 22.1. - The Rules developed by the Society endeavor to meetthe state of currently available technology at the time theyare published. The Society is not responsible for any inade-quacy or failure of these Rules or any other relevant docu-ments as a result of future development of techniques,which could not have been reasonably foreseen at the timeof their publication.2.2. - The Society exercises due care and skill: - in the selection of its Surveyors- in the performance of its services, considering the state ofcurrently available technology at the time the services areperformed.2.3. - Surveys conducted by the Society include, but are notlimited to, visual inspection and non-destructive testing.Unless otherwise required, surveys are conducted throughsampling techniques and do not consist of comprehensiveverification or monitoring of the ship or the good subject tocertification. The Society may also commission laboratory

testing, underwater inspection by divers and other checkscarried out by and under the responsibility of qualified ser-vice suppliers. Survey practices and procedures are selectedby the Society at its sole discretion based on its experienceand knowledge and according to generally accepted techni-cal standards in the industry.

Article 33.1. - The class assigned to a ship reflects the opinion of theSociety that the ship, given the intended use and within therelevant time frame, complies with the Rules applicable atthe time the service is rendered. Entry into force and appli-cation of new Rules are dealt with in Part A, Chapter 1, Sec-tion 1, Article 2 of the Rules.3.2. - No report, statement, notation on a plan, review, Cer-tificate of Classification, document or information issued orgiven as part of the services provided by the Society shallhave any legal effect or implication other than a representa-tion that the ship, structure, item of material, equipment ormachinery or any other item covered by such document orinformation meets the Rules. Any such representation isissued solely for the use of the Society, its committees andclients or other duly authorized bodies and for no other pur-pose. The validity, application, meaning and interpretationof a Certificate of Classification, or any similar document orinformation issued by the Society in connection with or infurtherance of the performance of its services, is governedby the Rules of the Society, which is the sole subject entitledto their interpretation. Any disagreement on technical mat-ters between the Interested Party and the Surveyor in thecarrying out of his functions shall be raised in writing assoon as possible with the Society, which will settle anydivergence of opinion or dispute.3.3. - The classification of a ship, or the issuance of a certif-icate in relation to or in furtherance of the classification of aship or the performance of services by the Society shallhave the validity conferred upon it by the Rules of the Soci-ety at the time of the assignment of class or issuance of thecertificate and in no case shall amount to a representation,statement or warranty of seaworthiness, structural integrity,quality or fitness for a particular purpose or service of anyship, structure, material, equipment or machinery surveyedby the Society.3.4. - Any document issued by the Society in relation to itsactivities reflects the condition of the ship at the time of thesurvey.3.5. - The Rules, surveys performed, reports, certificates andother documents issued by the Society are in no wayintended to replace the duties and responsibilities of otherparties such as Governments, designers, ship builders, man-ufacturers, repairers, suppliers, contractors or sub-contrac-tors, Owners or operators, underwriters, sellers or intendedbuyers of a ship or other surveyed good. They do not relievesuch parties from any warranty or responsibility or othercontractual obligations expressed or implied or from anyliability whatsoever, nor do they confer on such other par-ties any right, claim or cause of action against the Society.In particular, the above-mentioned activities of the Societydo not relieve the Owner of his duty to ensure the propermaintenance of the ship at all times. Likewise, the Rules,surveys performed, reports, certificates and other docu-ments issued by the Society are intended neither to guaran-tee the buyers of the ship, its components or any othersurveyed or certified good, nor to relieve the seller of theduties incumbent upon them according to the law or thecontract, regarding the quality, commercial value or char-

acteristics of the good which is the subject of transaction. Inno case, therefore, the Society shall assume the obligationsincumbent upon the above-mentioned parties, even when itis consulted in connection with inquiries concerning mat-ters not covered by its Rules or other documents. Insofar asthey are not provided for in the Preamble, the duties andresponsibilities of the Owner and Interested Parties withrespect to the services rendered by the Society are outlinedin Part A, Chapter 1, Section 1, Article 3.

Article 44.1. – Any request for any service of the Society shall besubmitted in writing and signed by or on behalf of the Inter-ested Party. Such request will be considered irrevocable assoon as received by the Society and shall entail acceptanceby the applicant of all relevant requirements of the Rules,including the Preamble. Upon acceptance of the writtenrequest by the Society, a contract between the Society andthe Interested Party is entered into, which is regulated by thepresent General Conditions.4.2. – In consideration of the services rendered by the Soci-ety, the Interested Party and the person applying for the ser-vice shall jointly be liable for the payment of the relevantfees, even if the service is not concluded for any cause notpertaining to the Society, upon receipt of the invoice andshall reimburse the expenses incurred. Interests at the legalcurrent rate increased by 2% may be demanded in theevent of late payment.4.3. - The contract and the validity of the relevant certifi-cates, if any, may be terminated at the request of either partysubject to 30 days’ notice to be given in writing. Failure topay the fees required for services carried out by the Societywhich fall within the scope of the above-mentioned con-tract will entitle the Society to terminate the contract andsuspend the Services. Unless decided otherwise by theSociety, termination of the contract implies that the assign-ment of class to a ship is withheld or, if already assigned,that it is suspended or withdrawn.

Article 55.1. - In providing the services mentioned in Article 1above, as well as other information or advice, neither theSociety nor any of its servants or agents warrants the accu-racy of any information or advice supplied. Furthermore, allexpress and implied warranties are specifically disclaimed.Except as provided for in paragraph 5.2 below, and also inthe case of surveys carried out by delegation of Govern-ments, neither the Society nor any of its servants or agentswill be liable for any loss, damage or expense of whatevernature sustained by any person, in tort or in contract, due toany act or omission of whatever nature, whether or not neg-ligent, and howsoever caused.5.2. – Notwithstanding the provisions in paragraph 5.1above, should any user of the Society's services prove thathe has suffered a loss or damage due to any negligent act oromission of the Society, its servants or agents, then the Soci-ety will pay compensation to such person for his provedloss, up to, but not exceeding, five times the amount of thefee - if any - charged by the Society for the specific service,information or advice or, if no fee is charged, a maximum of10 thousand Euro. Where the fees are related to a numberof services, the amount of fees will be apportioned for thepurpose of the calculation of the maximum compensation,by reference to the estimated time involved in the perfor-mance of each service. Any liability for indirect or conse-quential loss, damage or expense is specifically excluded.In any case, irrespective of the amount of the fees, the max-imum damages payable by the Society will be not morethan 1 million Euro. Payment of compensation under thisparagraph will not entail any admission of responsibility

and/or liability by the Society and will be made withoutprejudice to the disclaimer clause contained in paragraph5.1 above.5.3. - Any claim for loss or damage of whatever nature byvirtue of the provisions set forth herein shall be made inwriting, and notice shall be provided to the Society withinTHREE MONTHS of the date on which the services werefirst supplied or the damages first discovered. Failure to pro-vide such notice within the time set forth herein will consti-tute an absolute bar to the pursuit of such claim against theSociety.

Article 66.1. - Any dispute arising from or in connection with theRules or with the services of the Society, including anyissues concerning responsibility, liability or limitations ofliability, will be determined in accordance with Italian Lawand proceedings will be instituted in or transferred to theCourt of Genoa, Italy, which will have exclusive jurisdictionto hear and settle any such dispute.6.2. - As partial departure from point 6.1 above, the Societyshall have the faculty to submit any claim concerning thepayment of the fees for the Services to the Jurisdiction of theCourts of the place where the registered office of the Inter-ested Party or of the Applicant is located.

Article 77.1. - All plans, specifications, documents and informationprovided to, issued by, or made known to the Society, inconnection with the performance of its services, will betreated as confidential and will not be made available toany other party without authorization of the Interested Party,except as provided for or required by any applicable inter-national, European or domestic legislation, IACS Code ofEthics, Charter or other IACS rules, enforceable Court orderor injunction. Information about the classification and statu-tory certification status, including transfer, changes, suspen-sions, withdrawals of class, recommendations/conditionsof class, operating conditions or restrictions issued againstclassed ships and other related information, as may berequired, may be published on the website or released byother means, without the prior consent of the InterestedParty.7.2. - Notwithstanding the general duty of confidentialityowed by the Society to its clients in clause 7.1 above, theSociety clients hereby accept that the Society will partici-pate in IACS' Early Warning System which requires eachIACS Society to provide its fellow IACS Societies with infor-mation on serious hull structural and engineering systemsfailures, to enable such useful information to be shared andutilised to facilitate the proper working of IACS' Early Warn-ing System.7.3. - In the event of transfer of class and addition of a sec-ond class or withdrawal from a double/dual class, the Inter-ested Party undertakes to provide or to permit the Society toprovide the other Classification Society with all buildingplans and drawings, certificates, documents and informa-tion relevant to the classed unit, including its history file, asthe other Classification Society may require for the purposeof classification in compliance with IACS Procedure PR 1A,as amended, and applicable legislation. It is the Owner'sduty to ensure that, whenever required, the consent of thebuilder is obtained with regard to the provision of plans anddrawings to the new Society, either by way of appropriatestipulation in the building contract or by other agreement.Article 88.1. – Should any part of this Preamble be declared invalid,this will not affect the validity of the remaining provisions.8.2. - In the event of doubts concerning the interpretation ofthis Preamble, the Italian text will prevail.

EXPLANATORY NOTE

Summary of amendments introduced in the edi-tion effective from 1 January 2008The 2008 edition of the Rules for the Classification ofFloating Units intended for Production, Storage and Off-loading of Liquid Hydrocarbons or intended for Storage,Offloading and Regasification of Liquefied Gases can-cels and replaces the previous edition effective from 1January 2005.

Modifications introduced in this edition are designed toalign the Rules with the requirements of the Rules forthe Classification of Ships. In particular, modificationshave been made to Chapters 1, 2, 3, 4, 9 and 12 essen-tially to specify that:

a) For the purpose of classification, all the requirementsstated in these rules are to be complied with, except therequirements relevant to:• damage stability, as per items [5], [6] and [8.2] of

Chapter 4 • fire protection, as per Chapter 9, with the exception

of items [3.5] and [3.6]• fire protection for helicopter facilities, as per item [2]

of Chapter 12.

b) In particular, Articles [5], [6] and [8.2] of Chapter 4,containing damage stability requirements, are not appli-cable for the purpose of classification but, upon requestof the Interested Party, the additional class notation DMSis assigned to units classed by RINA and complying withthe requirements of these items.

c) Moreover, Chapter 9, with the exception of items[3.5] and [3.6], and item 2 of Chapter 12 and in generalthe requirements regarding fire protection, detectionand extinction (simply referred to as "fire protection")are not mandatory for the purpose of classification,except where RINA carries out surveys relevant to fireprotection statutory requirements on behalf of the flagAdministration. In such cases, fire protection statutoryrequirements are considered a matter of class and there-fore compliance with these requirements is also verifiedby RINA for classification purposes at class surveys.

RULES FOR THE CLASSIFICATION OF FLOATING UNITS INTENDED FOR PRO-DUCTION, STORAGE AND OFF-LOADING OF LIQUID HYDROCARBONS OR INTENDED FOR STORAGE, OFF-LOADING AND REGASIFICATION OF LIQUEFIED GASES

Chapters 1 2 3 4 5 6 7 8 9 10 11 12

Chapter 1 General

Chapter 2 Classification

Chapter 3 Surveys

Chapter 4 Subdivision, Stability and Freeboard

Chapter 5 Construction, Strength and Materials

Chapter 6 Machinery

Chapter 7 Electrical Installations

Chapter 8 Safety Arrangements

Chapter 9 Fire Protection

Chapter 10 Mooring System for the Shuttle

Chapter 11 Marine Operations

Chapter 12 Helicopter Deck

CHAPTER 1 GENERAL

1 Purpose and application 9

1.1

2 Definitions 9

2.1 Unit2.2 Site2.3 Sea depth2.4 Design activity2.5 Owner2.6 Shuttle2.7 Mooring system

3 Reference to other rules and guides 10

3.1

CHAPTER 2 CLASSIFICATION

1 Premise 11

1.1

2 General 11

2.1

3 Class notations 11

3.1 Service Notations3.2 Additional Class Notations

4 Classification 11

4.1

5 Documentation 11

5.1 Foreword5.2 Documents for information5.3 Documentation relevant to the calculations5.4 Documentation for approval

6 Operating Manual 12

6.1

7 Supervision 13

7.1

Rules for FPSO, FPO, FSO and FSRU 2008 3

CHAPTER 3 SURVEYS

1 General and application 14

1.1

2 First classification survey 14

2.1

3 Periodical surveys 14

3.1

CHAPTER 4 SUBDIVISION, STABILITY AND FREEBOARD


1.1 General1.2 Application

2 Stability test 15

2.1

3 Information on stability 15

3.1

4 Intact stability 15

4.1 General requirements4.2 Weather criterion4.3 Alternative stability criteria

5 Subdivision and damage stability 16

5.1

6 Extent of damage 16

6.1

7 Watertight integrity 17

7.1

8 Closing appliances 17

8.1 General requirements related to intact stability8.2 General requirements related to damage stability

9 Freeboard 17

9.1

4 Rules for FPSO, FPO, FSO and FSRU 2008

CHAPTER 5 CONSTRUCTION, STRENGTH AND MATERIALS

1 General principles for the construction of the hull and machinery 19

1.1 General1.2 Special requirements

2 Structural analysis 20

2.1 General2.2 Worldwide unrestricted service2.3 Restricted service2.4 Direct load calculation2.5 Impact between mooring system and unit

3 Materials, welding and relevant tests and checks 22

3.1

4 Protection against corrosion 22

4.1

CHAPTER 6 MACHINERY

1 General 23

1.1

2 Plans and specifications 23

2.1

3 Flares for hydrocarbons 23

3.1

4 Plants with burners for the combustion of hydrocarbons 23

4.1

5 Boilers and pressure vessels 23

5.1

6 Piping systems (except hydrocarbon processing plants) 24

6.1

7 Processing plants 24

7.1 Oil processing and handling plants7.2 LPG and LNG processing and handling plants

8 Plants for the use of LNG as fuel 24

8.1

9 Cargo hoses 24

9.1


CHAPTER 7 ELECTRICAL INSTALLATIONS

1 General 25

1.1 Application1.2 Documentation to be submitted1.3 System of supply1.4 Earth detection1.5 Electrical installation precautions

2 Hazardous location classification 25

2.1 General2.2 Ventilation2.3 Protection in overpressure

3 Electrical equipment permitted in gas-dangerous spaces and areas 26

3.1 General3.2 Electrical cables3.3 FSRU3.4 FPSO, FPO and FSO

CHAPTER 8 SAFETY ARRANGEMENTS

1 General 38

1.1

2 Definition 38

2.1

3 Drawings to be submitted 38

3.1

4 Basic principles 38

4.1

5 Functional requirements 38

5.1

6 Automatic and manual shutdown 39

6.1

7 Electrical equipment for use in an emergency 39

7.1


CHAPTER 9 FIRE PROTECTION


1.1 Application1.2 Documentation to be submitted1.3 Type approved products

2 Definitions 41

2.1 General2.2 Accommodation spaces2.3 A class divisions2.4 B class divisions2.5 C class divisions2.6 Continuous B class ceilings or linings2.7 Control stations2.8 Fire Test Procedures Code2.9 Fire Safety Systems Code2.10 Enclosed spaces 2.11 Fuel oil unit2.12 Hazardous areas 2.13 Low flame spread 2.14 Machinery spaces2.15 Machinery spaces of category A2.16 Non-combustible material2.17 Semi-enclosed locations 2.18 Service spaces2.19 Standard fire test2.20 Steel or other equivalent material2.21 Tank area2.22 Working spaces

3 Structural fire protection 44

3.1 General 3.2 Fire integrity of bulkheads and decks3.3 Protection of accommodation spaces, service spaces and control stations3.4 Ventilation systems - General requirements3.5 Ventilation systems in hazardous spaces3.6 Protection in overpressure

4 Means of escape 50

4.1

5 Active fire protection 51

5.1 Fire pumps, fire mains, hydrants and hoses5.2 Fire-extinguishing systems in machinery spaces and in spaces containing fired

processes5.3 Fire-extinguishing systems for galley deep-fat cooking equipment5.4 Fire-extinguishing systems for service spaces containing flammable liquids 5.5 Fire-extinguishing systems for diving 5.6 Portable fire extinguishers in accommodation, service and working spaces5.7 Additional fire-extinguishing systems for FPSO, FPO and FSO5.8 Additional fire-extinguishing systems for FSRU5.9 Fire detection and alarm system in accommodation and service spaces 5.10 Gas detection and alarm system5.11 Inert gas system5.12 Miscellaneous items


CHAPTER 10 MOORING SYSTEM FOR THE SHUTTLE

1 General and references 63

1.1 Stern or bow mooring1.2 Mooring alongside

CHAPTER 11 MARINE OPERATIONS

1 General and references 64

1.1

CHAPTER 12 HELICOPTER DECK


1.1

2 Fire protection for helicopter facilities 65

2.1 Application2.2 Structure2.3 Means of escape2.4 Fire-fighting appliances2.5 Drainage facilities in way of helidecks2.6 Helicopter refuelling and hangar facilities2.7 Operations manual and fire-fighting service


Chapter 1

CHAPTER 1 GENERAL

1 Purpose and application

1.1

1.1.1 These Rules apply to steel ships or non-self-pro-pelled craft permanently moored by means of a suitable sys-tem in the work site and used:

• for the production and/or storage and off-loading ofhydrocarbons

• for storage and/or off-loading and/or regasification ofliquefied natural gas (LNG) and liquefied petroleum gas(LPG).

These ships and non-self-propelled craft, hereafter referredto as "units" are to comply with the applicable requirementsfor oil tankers and barge tankers intended for the carriage ofoil products and/or gas carriers as applicable, stated in theRules for the Classification of Ships.

1.1.2 For the purpose of classification, all the requirementsstated in these Rules are to be complied with, except therequirements of:

• items [5], [6] and [8.2] of Chapter 4 relevant to damagestability

• Chapter 9, with the exception of items [3.5] and [3.6],relevant to fire protection;

• item [2] of Chapter 12 relevant to fire protection for hel-icopter facilities.

In particular, Articles [5], [6] and [8.2] of Chapter 4, con-taining damage stability requirements, are not applicablefor the purpose of classification but, upon request of theInterested Party, the additional class notation DMS isassigned to units classed by RINA and complying with therequirements of these items (see also [3.1.1] of Chapter 2).

Moreover, Chapter 9, with the exception of items [3.5] and[3.6], and item [2] of Chapter 12, and in general therequirements regarding fire protection, detection andextinction (hereinafter referred to as "fire protection") arenot mandatory for the purpose of classification, exceptwhere RINA carries out surveys relevant to fire protectionstatutory requirements on behalf of the flag Administration.In such cases, fire protection statutory requirements areconsidered a matter of class and therefore compliance withthese requirements is also verified by RINA for classificationpurposes at class surveys.

1.1.3 Special attention is to be paid to units having propor-tions different from those defined in Part B and Part E, Chap-ter 7 and 9, as applicable, of the Rules for the Classificationof Ships.

RINA may consider the acceptance of alternatives to theseRules, provided that they are deemed to be equivalent tothe Rules to the satisfaction of RINA.

The mooring system on the work site is to be qualified byRINA according to the requirements of the Guide for theDesign, Construction and Installation of Steel Offshore Sin-gle Point Moorings. As far as the technical provisions for thedesign, construction and installation of this system are con-cerned, RINA may accept as an alternative an other recog-nized international standard (e.g. API RP2SK, ISO/CD19904) proposed by the Owner.

RINA does not enter into any discussion on the efficacy ofthe service carried out in relation to the industrial activityforeseen.

The provisions of these Rules consider the installations con-cerned solely in relation to:

a) protection against fire and explosions during the above-mentioned activities (see also [1.1.2])

b) adequacy of the structural strength of the unit withregard to the stress produced during the above-men-tioned activities.As far as concerns:• amendments to the Rules• statutory rules• compliance with other rules• RINA's responsibility

and other general aspects, the relevant provisions of Part Aof the Rules for the Classification of Ships, apply.

2 Definitions

2.1 Unit

2.1.1 A ship or non-self-propelled craft permanentlymoored on the site and intended for the production and/orstorage and/or off-loading of hydrocarbons including lique-fied natural gas (LNG) and liquifeed petroleum gas (LPG).

2.2 Site

2.2.1 The geographical location where the unit is perma-nently moored in order to carry out the design activity.

2.3 Sea depth

2.3.1 The vertical distance between the seabed and theminimum level of the water, taking into account the (possi-bly combined) effects of the astronomical, barometric andaeolian tides.

2.4 Design activity

2.4.1 The industrial activity (production of hydrocarbons,storage and transfer, etc.) or similar, carried out by the unit,for which the latter has been designed and classed.


Chapter 1

2.5 Owner

2.5.1 The Owner of the unit and of its parts or whosoeveris responsible for its running. Owner, in this case, is synony-mous with "operator".

2.6 Shuttle

2.6.1 The ship which carries out the periodical off-loadingof the hydrocarbon stored by the unit.

2.7 Mooring system

2.7.1 The system which permanently moors the unit to thesite, fixing it to the seabed by means of piles, anchors orgravity.

3 Reference to other rules and guides

3.1

3.1.1 Reference is made in the text to provisions containedin other RINA Rules or Guides. Furthermore, provisions

contained in international standards are sometimes men-tioned as examples.

The above-mentioned cross-references are indicated as fol-lows:

a) RINA “Rules for the Classification of Ships”

b) RINA “Rules for the Construction and Classification ofMobile Offshore Drilling Units and other Similar Units”

c) RINA “Guide for the Design, Construction and Installa-tion of Steel Offshore Single Point Moorings”

d) RINA “Rules for the Classification of Steel Fixed Off-shore Platforms”

e) API RP 521 “Guide for Pressure Relieving and Depres-suring Systems”

f) OCIMF “Standards for Equipment employed in theMoorings of Ships at Single Point Moorings”

g) OCIMF “Buoy Mooring Forum Hose Guide” andOCIMF “Hose Standards”.

h) IGC Code “International Code for the Construction andEquipment of Ships Carrying Liquefied Gases in Bulk”.


Chapter 2

CHAPTER 2 CLASSIFICATION

1 Premise

1.1

1.1.1 Unless otherwise mentioned below, reference ismade to the relevant provisions in Part A of the Rules for theClassification of Ships.

2 General

2.1

2.1.1 A class notation is assigned (see [3]) to a unit whichhas been built and installed on the site, with or withoutRINA supervision, in accordance with the provisions ofthese Rules, including the other applicable requirements towhich reference is made in these Rules.

The Certificate of Classification is issued after satisfactorycompletion of the First Classification Survey (see Ch 3, [2]).

This certificate contains the unit's main characteristics, themooring site, the types of products which will be pro-duced/stored and any other information deemed necessary.

3 Class notations

3.1 Service Notations

3.1.1 Units accepted for class are assigned one of the fol-lowing notations:

FPSO : assigned to units intended for the production,storage and off-loading of liquid hydrocarbons

FPO : assigned to units intended for the productionand off-loading of liquid hydrocarbons

FSO : assigned to units intended for the storage andoff-loading of liquid hydrocarbons

FSRU : assigned to units intended for off-loading, stor-age and/or regassification of liquefied naturalgas (LNG) and/or liquefied petroleum gas (LPG)

Units built under RINA supervision are assigned the surveymark as per Part A of the Rules for the Classification ofShips, which precedes the class notation FPSO, FPO, FSO,FSRU.

3.2 Additional Class Notations

3.2.1 The additional class notation DMS is assigned tounits complying with the damage stability requirementsgiven in items [5], [6] and [8.2] of Chapter 4.

Other additional class notations may be assigned on thebasis of the requirements of Part F of the Rules for the Clas-sification of Ships, as far as practicable.

4 Classification

4.1

4.1.1 Classification of the unit takes into account:

a) the materials used and their relevant connections

b) the structural strength

c) the intact stability; for damage stability, see [1.1.2] ofChapter 1

d) the watertightness and the weathertightness

e) the mooring system for the shuttle

f) the helicopter deck

g) the machinery and equipment needed for the normalfunctioning of the unit

h) active and passive fire protection (see [1.1.2] of Chapter1)

i) the system of protection against corrosion.The machinery, electrical installations and piping used tocarry out the design activity are considered, for the issuingof the Certificate of Classification, as stated in Ch 1, [1].

When the above-mentioned machinery, electrical installa-tions and piping are built in accordance with specifiedrequirements, at the request of the Interested Parties RINAwill certify compliance with these requirements by issuing afurther certificate.

5 Documentation

5.1 Foreword

5.1.1 The documentation listed under the following para-graphs is to be submitted to RINA for each unit requiringclassification, before construction and/or installationbegins, as applicable.

5.2 Documents for information

5.2.1 One copy of the documents concerning the follow-ing is to be submitted:

a) arrangement of the unit

b) description of the mooring system

c) expected life on the site

d) description of the site

e) characteristics of hydrocarbons to be produced and/orstored

f) specification of the production/storage system of theproduct

g) complete description of all the equipment, machineryand plants used to carry out the design activity


Chapter 2

h) meteoceanographic report

i) description of the calculation programs used in thedesign

j) Codes and Standards used for the design and construc-tion

k) construction methods.

5.3 Documentation relevant to the calcula-tions

5.3.1 The documentation relative to the items listed below,one copy of which is to be submitted, is not subject toapproval; however, RINA is to be notified in advance of thecriteria and methods for performing the calculations (car-ried out using calculation programs):

a) Report on the evaluation of the loads transmitted by themooring system

b) Calculations related to the analysis of the structuresconnected to the mooring and in particular to:

• the static analysis

• the dynamic analysis

• the fatigue analysis

c) The analysis of the system of protection against corro-sion.

5.4 Documentation for approval

5.4.1 The following documentation is to be submitted toRINA for approval in four copies:

a) plans of the structural members of the unit. In particular,a plan of all the tanks indicating their expected use, theworking temperature and the height of the overflowpipes is to be sent for approval

b) structure and arrangement of the helicopter deck (if any)

c) system of protection against corrosion

d) documentation concerning materials and welds

e) detailed procedures for the construction and installa-tion. If transfer to the site does not occur by tug or self-propulsion but by transportation, the methods of trans-portation are also to be taken into consideration

f) intact stability calculations; damage stability calcula-tions if the assignment of the additional class notationDMS is requested

g) plans and specifications of the machinery and electricalsystems (see Chapters 6 and 7)

h) documentation concerning the safety arrangements (seeChapter 8)

i) plans and specifications related to fire protection (seeChapter 9 and item [2] of Chapter 12, if any). As regardsthis item, see also the provisions in item [1.1.2] ofChapter 1

j) plans of the components of the shuttle's mooring systemand of any other auxiliary mooring systems

k) loading manual relative to the hull longitudinal strengthin still water or, alternatively, diagrams of the shear andbending moments in still water for a sufficient number

of loading conditions to cover situations which canoccur during the actual running.

As a substitute for the loading manual and the above-men-tioned diagrams, an electronic instrument capable of sup-plying the values of the bending moment and of the shearforce in a sufficient number of sections is acceptable.

In this case, the files containing the calibration conditionsof the instrument are to be sent to RINA.

5.4.2 The plans of machinery, piping and other equipmentused to carry out the design activity are examined andapproved in relation to the aspects in Ch 1, [1].

6 Operating Manual

6.1

6.1.1 An Operating Manual, containing all the informationneeded to run the unit safely under normal and emergencyconditions is to be drafted and kept on board for use of thecrew. It is to include at least the following:• a general description of the unit• a general description of the mooring system• the values of the parameters which define the most

severe environmental conditions acceptable during therunning and maintenance phases

• general plans showing the watertight compartments,openings, air pipes and cargoes allowed in the variouszones of the unit

• the data for the lightweight unit and the hydrostaticcurves (both in upright and heeling conditions) or equiv-alent data, compiled on the basis of the results of a sta-bility test

• capacity plan showing the capacity and centre of gravityand the correction for free surfaces for each tank

• instructions for the running of the unit, including theoperations to be carried out to enable it to withstand themost severe environmental working conditions

• plans of the ballasting system and instructions for ballastloading and unloading

• a few significant examples of operating conditions• the data relevant to the stability of the unit, if possible

clearly expressing the maximum acceptable value of theheight of the centre of gravity in relation to the draughtor other parameters in accordance with the unit's stabil-ity criteria, in intact condition and, where the assign-ment of the additional class notation DMS is requested,in damaged condition

• the mooring and off-loading operations to be carried outfor the shuttle

• the values of the parameters which establish the maxi-mum assumed environmental conditions to determinethe loads acting on the shuttle's mooring system (whenapplicable)

• for units expected to operate on sites characterized byvery low ambient temperatures, means to be used oroperating limits, if any, as a result of ice accumulationon exposed surfaces


Chapter 2

• schematic diagram of the electrical installations and therelative electric balance of the main and emergencysource of electrical power and of the emergency batter-ies

• the detailed procedures in order to shut down the sys-tem installations concerned in the event of an emer-gency

• schematic diagram of the main systems for off-loadingand storing the oil fuel

• schematic diagram of the inert gas system• schematic diagram of systems to detect toxic and/or

flammable mixtures• schematic diagrams of hydrocarbon and/or LNG/LPG

handling and processing systems, including venting sys-tems

• schematic diagrams of the system for the use of hydro-carbon and/or LNG/LPG as fuel in boilers or internalcombustion engines or gas-fired turbines

• plans showing the hazardous areas• plans for fire protection, including the type and position

of fire detection or fire-extinguishing means and ofmeans of escape from all compartments; as regards thisitem, see also the provisions in item [1.1.2] of Chapter 1

• the safety provisions, including the position anddescription of how to use the life-saving appliances anda procedure for abandoning the unit

• the conditions related to any seasonal restrictions for theunit's operation

• identification and characteristics of the helicopter usedas a basis for the design of a possible helicopter deck

• a detailed description of the operations needed to dis-connect and subsequently reconnect the unit to themooring system, if this is foreseen

• instructions for the monitoring systems foreseen for theunit

• the program of periodical surveys and maintenance ofthe unit

• identification of the components (if any) made of materi-als which have uncommon welding characteristics andthe recommended procedures for the relevant repairs.

The Operating Manual is to contain the particulars relevantto all the elements included which have been subjected toexamination and approval by RINA.

7 Supervision

7.1

7.1.1 Supervision is intended to mean the series of checksand operations carried out by RINA to ensure that the unithas been built and installed in accordance with the provi-sions of these Rules.

It is performed through the approval of plans and examina-tion of documentation, the testing of materials and equip-ment, as well as tests and inspections during the variousfabrication and installation phases of the unit so as toensure that it is constructed in accordance with the preceptsof sound building practice and with the documents (plans,specifications and procedures) already examined andapproved by RINA.


Chapter 3


CHAPTER 3 SURVEYS

1 General and application

1.1

1.1.1 A first classification survey will be carried out on theunit in order to obtain the RINA class and the relevant Cer-tificate of Classification.The unit is to undergo periodical surveys and possible occa-sional surveys in order to maintain the class during its oper-ating life.

The relevant provisions contained in Part A of the Rules forthe Classification of Ships are to be applied during thesesurveys with the following further specifications.

As stated in [1.1.2] of Chapter 1, the requirements regardingfire protection, detection and extinction (hereinafterreferred to as "fire protection") are not mandatory for thepurpose of classification, except where RINA carries outsurveys relevant to fire protection statutory requirements onbehalf of the flag Administration. In such cases, fire protec-tion statutory requirements are considered a matter of classand therefore compliance with these requirements is alsoverified by RINA for classification purposes at class surveys.

2 First classification survey

2.1

2.1.1 For the first classification survey, as well as the crite-ria and procedures applicable to units built with or without

RINA supervision as stipulated in Part A of the Rules for theClassification of Ships, the following items are to be takeninto special consideration:

a) the unit's expected life on the site without dry-dockingso as to prepare the procedures and arrangements forthe bottom survey when the unit is afloat

b) the preparation of the hull, machinery and equipment tobe surveyed during the unit's life in accordance with theprocedures and programs stated in [3].

3 Periodical surveys

3.1

3.1.1 Depending on the unit's particular function, a hulland machinery continuous survey program will generallybe adopted regardless of age limits, with a bottom surveywhilst the unit is afloat, in accordance with a scheme sug-gested by the Owner, approved by RINA and kept on theunit; such program is also to include the production plant.

The program is to be devised in relation to the unit's con-struction and functional characteristics, the mooring systemand the environmental conditions expected for the site, soas to make the inspections foreseen in Part A of the Rules forthe Classification of Ships as simple, effective and safe aspossible for the operating personnel.

Chapter 4

CHAPTER 4 SUBDIVISION, STABILITY AND FREEBOARD


1.1 General

1.1.1 The unit is to be stable in all loading conditions. It isconsidered stable when the requisites of static and dynamicstability stipulated below have been met, these being calcu-lated for at least the following loading conditions:

a) light-weight unit

b) unit fully loaded corresponding to the freeboard centredisc or to the given draught, the cargo being evenly dis-tributed in each area to which it has been assigned, fullyequipped, without liquid ballast

c) unit with half the cargo

d) unit in ballast condition.Furthermore, the stability characteristics are to be calcu-lated for the loading conditions, derived from those statedby the Owner in relation to the unit's actual use, whichcould prove to be less favourable than those mentionedabove.

1.2 Application

1.2.1 As stated in [1.1.2] of Chapter 1, items [5], [6] and[8.2] containing damage stability requirements are notapplicable for the purpose of classification but, uponrequest of the Interested Party, the additional class notationDMS is assigned to units classed by RINA and complyingwith the requirements of these items.

2 Stability test

2.1

2.1.1 Unless RINA has sufficient data to be able to deter-mine the stability characteristics with certainty, each unit isto undergo a stability test under the supervision of a RINASurveyor.This test is to be carried out as near as possible to the unit'scompleted construction so as to determine precisely its dis-placement and centre of gravity when light and dry.

3 Information on stability

3.1

3.1.1 The Master of the unit is to be given instructions todetermine the stability for the various loading conditions.The documentation concerning the instructions is to be sentto RINA for approval. It is to be updated each time modifi-cations are made to the unit which, in the opinion of RINA,considerably alter the stability characteristics.

This documentation is to contain all the necessary informa-tion to determine the unit's trim and stability characteristics.

Furthermore, it is t contain the characteristics, stability andtrim of the light-weight unit and the examination of the sta-bility and trim for the loading conditions in [1].

4 Intact stability

4.1 General requirements

4.1.1 In each loading condition the following is to be satis-fied:

a) the initial metacentric height, calculated by taking intoaccount the influence of the free surfaces, is to be notless than 0,15 m

b) the diagrams of the stability arms are to confirm the fol-lowing requisites:

1) the arm of maximum stability Gzmax is to correspondto a transverse heeling angle preferably greater than30° but in any case not less than 25°;

2) the arm of stability GZ is to be not less than 0,20 mwith a transverse heeling angle θ not less then 30°;

3) the area below the stability diagram is to be not lessthan 0,055 m·rad for heeling angles θ from 0° to 30°and not less than 0,09 m·rad for heeling angles θfrom 0° to 40° or to θf if the latter is less than 40°.

The heeling angle qf is that which corresponds to theintake of water and therefore defines where the sta-bility curve is to be considered broken.

In addition to the above, the area below the stabilitydiagram is to be not less than 0,030 m·rad, for heel-ing angles from 30° to 40° or from 30° to θf, if θf isless than 40°

c) the provisions of the following paragraphs are to bechecked in relation to the action of the wind.

4.2 Weather criterion

4.2.1 The curves are to be traced of the righting and heel-ing moments due to the transverse wind similar to thoseshown in Fig 1, together with the relevant calculations, tak-ing into account the maximum cargo on the deck and theequipment placed in the most unfavourable position.

The effect of the free surfaces in the tanks is to be taken intoaccount.

4.2.2 If there are structural fittings which can be disman-tled and stowed, further curves of the heeling moment dueto the wind may be requested and the relevant documenta-tion is to clearly indicate the position of these fittings.


Chapter 4

4.2.3 When calculating the righting moment, any possiblenegative effects due to the presence of the mooring systemare to be taken into account.

4.2.4 As regards the calculation of the forces and heelingmoment due to the wind, reference is made to the relevantprovisions of the Rules for the Construction and Classifica-tion of Mobile Offshore Drilling Units and other SimilarUnits.

In particular, for the wind speed, the characteristic value ofthe site corresponding to a recurring period of 100 years orthe speed of 51,5 m/s (100 knots) is to be assumed, which-ever is the greater.

For sites situated in protected zones, RINA reserves the rightto accept a wind speed less than 51,5 m/s.

4.2.5 The stability of a unit is to satisfy the criteria statedunder the following items (a) and (b) (see also Fig 1):

a) The ratio of the area under the righting moment curve tothat under the heeling moment curve up to the angle inway of the second intercept or up to the downfloodingangle θf , whichever is the lesser, is to be not less than1,4.

b) The righting moment curve is to be positive over theentire range of angles up to the angle in way of the sec-ond intercept.

4.2.6 Each unit should be capable of attaining a severestorm condition in a period of time consistent with themeteorological conditions. The procedures recommendedand the approximate length of time required, consideringboth operating conditions and transit conditions, should becontained in the Operating Manual.

It should be possible to achieve the severe storm conditionwithout the removal or relocation of solid consumables orother variable load. However, RINA may permit loading aunit past the point at which solid consumables would haveto be removed or relocated to attain the severe storm condi-tion under the following conditions, provided the allowableKG requirement is not exceeded:

a) in a geographic location where weather conditionsannually or seasonally do not become sufficientlysevere to require a unit to go to severe storm conditions,or

b) where a unit is required to support extra deckload for ashort period of time that falls well within a period forwhich the weather forecast is favourable.

The geographic locations, weather conditions and loadingconditions in which this is permitted should be identified inthe Operating Manual.

4.3 Alternative stability criteria

4.3.1 Alternative stability criteria may be considered byRINA provided an equivalent level of safety is maintainedand it is demonstrated that they afford adequate positive ini-tial stability.

5 Subdivision and damage stability

5.1

5.1.1 The unit is to have sufficient freeboard and be subdi-vided in such a way to ensure sufficient buoyancy and sta-bility to withstand flooding of the compartments betweenthe transverse watertight bulkheads affected by damage tothe extent set out in [6].

5.1.2 The unit in a damaged condition is to have sufficientreserve stability to withstand the wind heeling momentbased on a transverse wind velocity of 25,8 m/s (50 knots).In this condition, the final waterline after flooding, takinginto account sinkage, heel and trim, is to be above the low-est edge of any opening through which progressive floodingmay take place.

5.1.3

a) The requirements of [5.1.1] and [5.1.2] is to be assessedby calculations taking into account the loading condi-tions foreseen for the unit.

b) The possibility of relaxing the above-mentioned require-ments by considering the ability to reduce the heelingangles by pumping out, ballasting or applying mooringforces is not accepted.

c) In flooding checks, tanks with vents or overflowslocated in spaces assumed to be flooded or which ter-minate on open decks and in a position below the finalwaterline after flooding are to be taken into considera-tion.

d) All piping, ventilation systems, tanks etc. affected by thedamage referred to in [6.1] are to be considered dam-aged. Effective means of closure are to be provided atwatertight boundaries to preclude the progressive flood-ing of the other spaces which are considered to beintact.

6 Extent of damage

6.1

6.1.1 In assessing the damage stability, it is to be assumedthat damage can occur to the following extent betweeneffective watertight bulkheads:

a) horizontal penetration: 1,5 m; and

b) vertical extent: from the base line up without limit.

6.1.2 The distance between effective watertight bulkheadsor their nearest stepped portions which are positionedwithin the assumed extent of horizontal penetration shouldbe not less than 3,0 m; where there is a lesser distance, oneor more of the adjacent bulkheads should be disregarded.

6.1.3 Where damage of a lesser extent than in [6.1.1]results in a more severe condition, such lesser extent shouldbe assumed.


Chapter 4

7 Watertight integrity

7.1

7.1.1 The number of openings in the watertight bulkheadsis to be kept to a minimum compatible with the design andproper working of the unit.

Where it is necessary to penetrate the watertight bulkheadsfor access or piping, ventilation, electrical cables etc.,arrangements are to be made to maintain the watertightintegrity of the enclosed compartments.

When the watertight boundaries are provided with valves tomaintain watertight integrity, it is to be possible to operatethese valves from a pump room or other normally mannedspace, an open deck or a deck situated above the bulkheaddeck.

Valve position indicators are to be provided in the remotecontrol room.

8 Closing appliances

8.1 General requirements related to intact stability

8.1.1 Closing appliances are to comply with the applica-ble requirements of the International Convention on LoadLine in force.

8.2 General requirements related to damage stability

8.2.1 Internal openings

a) The closing appliances which are to ensure the water-tight integrity of internal openings used during the oper-ation of the unit are to comply with the followingrequirements:

1) it is to be possible to operate the closing appliancesboth by remote control from a central position onthe deck which is above the final waterline afterflooding, and locally from each side of the bulk-head. The control rooms are to be supplied withindicators which show whether the closing appli-ances are open or closed.

2) the requirements concerning remote control in (1)may be dispensed with for those closing applianceswhich are normally closed while the unit is afloat,provided an alarm system (for example light signals)is arranged both locally and in a central positiontelling the personnel whether the closing appliancesin question are open or closed. A notice is to be

affixed to each side of the closing appliance statingthat it is not to be left open while the unit is afloat.

3) the closing appliances are to be strong and to pos-sess securing devices and enough packing to main-tain watertightness when they are subjected to thedesign water pressure pertaining to the boundary ofthe flooded subdivision on which they are placed.

b) The closing appliances to ensure the watertight integrityof internal openings which are kept permanently closedduring the operation of the unit are to comply with thefollowing:

1) a notice is to be affixed to each side of the closingappliance stating that it is to be kept closed whilethe unit is operating. Manholes fitted with closedbolted covers are not subject to this requirement

2) the closing appliances are to be strong and to pos-sess securing devices and enough packing to main-tain watertightness when they are subjected to thedesign water pressure pertaining to the boundary ofthe flooded subdivision on which they are placed

8.2.2 External openings

a) Where the watertight integrity of the unit depends onexternal openings which are used during the operationof the unit, these openings are to comply with the fol-lowing requirements:

1) the openings whose lower edge is not to be belowthe waterline in the final condition of equilibriumafter flooding, taking into account the effects of thewind, include: air pipes (without any considerationof their closing appliances), ventilators, ventilationintakes and outlets, non-watertight hatches anddoorways not fitted with watertight closing appli-ances

2) the openings which may be submerged include:manholes fitted with closed bolted covers, smallhatches and sidescuttles of the non-opening type.

b) The requirements of item [8.2.1] (b) are to be appliedwhere the watertight integrity depends on the externalopenings which are kipt permanently closed during theoperation of the unit.

9 Freeboard

9.1

9.1.1 Classification of the unit presupposes that all theapplicable requirements and provisions contained in theInternational Convention on Load Line in force are com-plied with.


Chapter 4

Figure 1 : Righting moment and heeling moment curves

Momentsheelingmoment

rightingmoment

down-floodingangle

secondintercept

Angle of heel θθf


Chapter 5

CHAPTER 5 CONSTRUCTION, STRENGTH AND MATERIALS

1 General principles for the construc-tion of the hull and machinery

1.1 General

1.1.1 Safety requirementsThe units are to be built so as to ensure an acceptable safetylevel with regard to the safety of human life at sea and theprevention of environmental pollution.

A unit is considered to ensure such level of safety when it isbuilt according to the provisions contained in these Rulesand in the Codes and supplementary Standards mentionedin Chapter 1, [3.1.1].

1.1.2 Functional requirementsThe functional efficiency of the unit, that is to say its capac-ity to be correctly operated during the design activity, mayrequire particular design criteria which may influence theconditions of classification.

In such case, RINA is to be informed at the design stage bythe Designer or the Owner of these criteria and of theadded functional requisites derived from them.

1.1.3 Supplementary Codes and StandardsDuring the design of a single component of a unit, provi-sions of different Codes or Standards may not generally beadopted.

The supplementary Codes and Standards used for thedesign with regard to materials which are to be classed areto be accepted by RINA. In the case of a clash between theprovisions of the Codes or Standards adopted and those ofthese Rules, RINA may accept the former provided that, inits view, they guarantee a global safety level equal to orhigher than that guaranteed by these Rules.

1.1.4 Protection against accidental damageThe following principles aimed at protecting the unit againstaccidental damage are to be taken into consideration:

• reduction of the probability of damage

• reduction of the consequences of damage.

To this end, in particular, the following requirements apply:

a) piping and equipment whose failure could cause dangerto people and/or structures are to be installed in a shel-tered position or supplied with local reinforcements, soas to reduce to a minimum the risk of accidental dam-age

b) "risers" and similar equipment are to be situated at a safedistance from the mooring area and areas within theradius of cranes

c) the subdivisions crossed by pressure piping are to bedesigned to withstand overpressure caused by a failure

in the piping, unless adequate systems to discharge theoverpressure are foreseen

d) suitable fenders are to be installed to reduce the conse-quences of accidental impacts of the shuttle or of othermeans operating near the unit.

1.2 Special requirements

1.2.1 The units are to be built so as to reduce to a mini-mum their sensitivity to environmental factors and to oper-ating stresses and to facilitate their construction, inspectionand any repairs.

1.2.2 In exceptional cases of components which do notsatisfy such requirements, RINA may demand compliancewith supplementary precautionary rules concerning thestrength and maintenance over the years of the functionalcharacteristics.

1.2.3 Secondary structures, such as fenders, landingstages, mooring bolts, etc. are to be built so that their col-lapse, due to accidental overloading, will not result in theircausing damage to the unit's main structures or to person-nel.

1.2.4 Complex solutions and brusque variations of sec-tions giving rise to dangerous concentrations of stresses areto be avoided as far as possible in connections and struc-tural nodes.

The transmission of tensile stresses through the thickness ofthe plates is also to be avoided as far as possible.

1.2.5 For units built to operate on sites characterized byparticularly low temperatures, solutions are to be adoptedwhich minimize the accumulation of ice on the structuresand machinery; suitable means are to be foreseen prevent-ing drinking water and water to extinguish fires from freez-ing.

Furthermore, it is necessary to take into account the possi-bility of floating blocks of ice hitting the structures of theunit situated in the splash zone.

1.2.6 If the unit is moored at the stern and is subsequentlystruck by waves, the structures concerned are to be rein-forced to RINA's satisfaction.

1.2.7 The Designer will be required to submit for reviewcalculations showing the adequacy of the structure to with-stand the impact of the waves.

1.2.8 Classification presupposes that the vibrations of thestructures do not interfere with the normal running of theunit.


Chapter 5

1.2.9 A detailed report of the calculations related to thedesign of mechanical parts having relative movements (spe-cial bearings) is to be submitted to RINA.

1.2.10 The plants for burning the residual hydrocarbonsfrom the production are to be built and situated so that theheat from the combustion does not produce hazards onboard or cause damage to the plants and structures.

2 Structural analysis

2.1 General

2.1.1 Intended serviceThe structural checks are to be performed according to theintended service of the unit. The intended service is dividedinto two categories:

a) Worldwide unrestricted service; this implies that theunit will be dimensioned such that it can withstand theenvironmental loads to be expected at any location inthe world.

b) Restricted service; this implies that the unit will bedimensioned in order to withstand the environmentalloading to be expected in a specific location.

2.1.2 Applicable loadsIrrespective of the type of intended service of the unit, thesite-specific environmental conditions are to be taken intoaccount by means of direct load calculations.

requirement, checked according to the relevant provisionsof Part B of the Rules for the Classification of Ships. If thedirect load calculations result in higher loads than thoseconsidered in the above-mentioned Rules, the former loadsare to be utilised.

2.2 Worldwide unrestricted service

2.2.1 GeneralWhen the unit is intended for worldwide unrestricted serv-ice, the site-specific environmental conditions are to betaken into account by means of direct load calculations.

2.2.2 LoadsAccelerations, motions and loads are to be determined fromthe calculations in [2.2.1], according to the provisions in[2.4], and from any model tests that might be available.

However, the values are not to be taken lower than those inPart B Chapter 5 of the Rules for the Classification of Ships.

2.2.3 Hull girder strengthThe check of the minimum required longitudinal strength ofa unit intended for worldwide unrestricted service is to becarried out according to Part B, Chapter 6 and Part E, Chap-ters 7 and 9, as applicable, of the Rules for the Classifica-tion of Ships, assuming that:

• the values of the design still water bending momentsand shear forces are the sum of the maximum verticalbending moment and shear forces induced by the moor-ing system and the corresponding values calculated inthe design loading conditions;

• the wave bending moments and shear forces are calcu-lated according to [2.2.2].

2.2.4 Local strengthThe structural scantlings are to be checked according to therelevant provisions of Part B and Part E, Chapters 7 and 9, asapplicable, of the Rules for the Classification of Ships on thebasis of the loads defined in [2.2.2].

2.2.5 Fatigue analysisThe analysis of fatigue life is to be carried out according toPart B Chapter 7 Section 4 of the Rules for the Classificationof Ships, on the basis of the loads defined in [2.2.2].

Due concern is to be given to the actual operational condi-tions that may decrease the fatigue life, such as: single pointmoored units always in head sea condition.

As a minimum requirement the structural details are to sat-isfy the fatigue life provisions of Part B, Chapter 7 of theRules for the Classification of Ships.

2.2.6 Area of connection with mooring systemThe local strength of the area connected with the mooringsystem is to be checked by considering the forces transmit-ted by this system, assuming the methods of analysis andcalculation and allowable stresses as stated in the Rules.

2.2.7 Area supporting the equipment producing hydrocarbons

The local strength of the structures supporting the equip-ment producing hydrocarbons is to be checked on the basisof the weight of the equipment and the forces induced on itby the wind and by the movements and accelerations of theunit, as defined in [2.2.2].

2.3 Restricted service

2.3.1 GeneralWhen the unit is intended for restricted service, the site-spe-cific environmental conditions are to be taken into accountby means of direct load calculations.

2.3.2 LoadsAccelerations, motions and loads are to be determined fromthe calculations in [2.3.1], according to the provisions of[2.4], and from any model tests that might be available.

2.3.3 Hull girder strengthThe check of the minimum required longitudinal strength ofa unit intended for worldwide unrestricted service is to becarried out according to Part B, Chapter 6 and Part E, Chap-ters 7 and 9, as applicable, of the Rules for the Classifica-tion of Ships, assuming that: • the values of the design still water bending moments

and shear forces are the sum of the maximum verticalbending moment and shear forces induced by the moor-ing system and the corresponding values calculated inthe design loading conditions.

• the wave bending moments and shear forces are calcu-lated according to [2.3.2].

The minimum midship section modulus according to theRules for the Classification of Ships may be reduced by upto 25%, provided that the design wave loads are based on


Chapter 5

direct calculations with site-specific wave conditions,according to the provisions of [2.4].

A unit that has previously been classed with the additionalservice notation "Unrestricted Navigation" according to therelevant provisions of the above-mentioned Rules, can beassumed to have sufficient longitudinal strength without anyfurther checks, provided that:

a) the significant wave height at the site of operation is lessthan 8,5 m for a 100 year return period (annual exceed-ance 10-2).

b) the environmental wave conditions at the site of opera-tion are demonstrated to be significantly milder than theconditions in the North Atlantic.

2.3.4 Local strengthThe structural scantlings are to be checked according to therelevant provisions of Part B and Part E, Chapters 7 and 9, asapplicable, of the Rules for the Classification of Ships on thebasis of the loads defined in [2.3.2].

2.3.5 Fatigue analysisThe analysis of fatigue life is to be carried out according toPart B Chapter 7 Section 4 of the Rules for the Classificationof Ships, on the basis of the loads defined in [2.3.2].

Due concern is to be given to the actual operational condi-tions that may decrease the fatigue life, such as: single pointmoored units always in head sea condition.

2.3.6 Area of connection with mooring systemThe local strength of the area connected with the mooringsystem is to be checked by considering the forces transmit-ted by this system, assuming the methods of analysis andcalculation and allowable stresses as stated in the Rules forthe Classification of Ships.

2.3.7 Area supporting the equipment producing hydrocarbons

The local strength of the structures supporting the equip-ment producing hydrocarbons is to be checked on the basisof the weight of the equipment and the forces induced on itby the wind and by the movements and accelerations of theunit, as defined in [2.3.2].

2.4 Direct load calculation

2.4.1 LoadsThe check of the longitudinal and local strength of a unit bymeans of direct load calculations implies that:

a) the values of the hull girder bending moments and shearforces are generally to be determined taking into consid-eration:

• still water loads,

• wave induced loads,

• mooring loads.

b) the values of the local loads are generally to be deter-mined taking into consideration:

• still water loads,

• wave induced loads,

• sloshing loads,

• mooring loads,

• loads induced by green water on deck,

• slamming loads,

• wind loads,

• snow and ice loads.

c) the global wave induced loads are to be calculated by3D sink-source theory or 2D strip theory. Proper consid-eration is to be given to the site-specific environmentalconditions, which are to be described using relevantdata for the period and areas in which the unit is tooperate. The site-specific wave climate is to bedescribed by a scatter diagram.

d) individual environmental loads, vessel motions andaccelerations are to be determined for:

• 20-year return period (annual probability of exceed-ance 10-1,3) if the unit is to operate in worldwideunrestricted service and hence is to comply withrequirements in Part B of the Rules for the Classifica-tion of Ships,

• 100-year return period (annual probability ofexceedance 10-2) if the unit is to operate in restrictedservice.

2.4.2 Environmental conditionsThe environmental conditions are to be documented withadequate data for the specific site of operation. All dataused are to be fully documented with the sources and esti-mated reliability of data noted.

Probabilistic methods for short-term, long-term andextreme-value prediction are to be based on statistical dis-tributions appropriate to the environmental phenomenabeing considered.

Generally, environmental data and analyses supplied byrecognized consultants will be accepted as the basis fordesign. If available for the location of interest, publisheddesign standards and data may be cited as documentation.

Specifically, the following environmental data are normallyto be provided:

a) Wave scatter diagram assigning probability of occur-rence to all sea states, characterised by a significantwave height and a wave period, which can be expectedin the considered site of operation.

b) Extreme events of 100-, 10- and 1-year return perioddata for wind speeds, significant wave height and cur-rent. A range of associated wave periods is to be givenfor each considered significant wave height. Both winterstorms and tropical cyclones (hurricanes or typhoons), ifany, need to be considered.

c) Directional data and angular separation for extreme val-ues of wind, waves and current.

d) Wave spectral shape formulation.

e) Current speed and directional variation through thewater depth.

f) Long-term wave statistics by direction.

g) Ice, iceberg and snow, if any.


Chapter 5

2.5 Impact between mooring system and unit

2.5.1 The possibility of impact on the structures connectedto the mooring system is to be taken into consideration.

3 Materials, welding and relevant tests and checks

3.1

3.1.1 Reference is made to the Rules for the Constructionand Classification of Mobile Offshore Drilling Units and

other Similar Units as regards the choice of materials, weld-ing processes and relative tests and checks.

4 Protection against corrosion

4.1

4.1.1 The strength structures of the hull of the unit are tobe protected against corrosion.The systems of protection adopted, their design, the materi-als used and the manufacturing processes and installationare subject to approval by RINA on the basis of the relevantprovisions of the Rules for the Construction and Classifica-tion of Mobile Offshore Drilling Units and other SimilarUnits or of other recognised regulations.


Chapter 6

CHAPTER 6 MACHINERY

1 General

1.1

1.1.1 All machinery, flares and burners for hydrocarbons,boilers and other pressure vessels, pumping and piping sys-tems necessary for safety and for the intended function ofthe units are to be suitable for such function, comply withthe provisions of these Rules and be installed and protectedso as to reduce to a minimum the hazards for personnel.The design is to take into consideration the materials usedfor the construction, the industrial and marine aims of theequipment and the working and environmental conditionsto which it is subject. The relevant provisions of the Rulesfor the Classification of Ships generally apply.RINA reserves the right to take into consideration newdesigns for special systems on a case-by-case basis.

2 Plans and specifications

2.1

2.1.1 Prior to the installation of systems on board, the fol-lowing plans are to be sent (in quadruplicate) to RINA forapproval:

a) flares for hydrocarbons

b) burners for hydrocarbons

c) plants which will dilute gaseous hydrocarbons into theatmosphere

d) boilers, associated safety valves and pressure vessels

e) pumping and piping systems

f) processing plants

g) systems for the combustion of hydrocarbons in steamboilers, diesel engines and gas turbines

h) in the case of units intended for the storage of LNG orLPG, the documentation requested in Table 2 of Pt E Ch9 Sec 1 of the Rules for the Classification of Ships, asapplicable.

All the elements necessary for checking and interpreting theplans, in particular the materials used, the working pres-sures and temperatures, the capacity of the pumps and fansand the capacity of the tanks.

3 Flares for hydrocarbons

3.1

3.1.1 Flares for hydrocarbons are to be designed accordingto recognised standards (e.g. those referred to in the Rulesfor the Classification of Steel Fixed Offshore Platforms) andinstalled so as not to cause hazards on board.

3.1.2 Flares are not to be installed in hazardous areas. Asregards the choice of their location on board, the volumeaffected by the radiating heat during the maximum foreseencombustion activity is to be taken into consideration. As arule, the position in which combustion takes place is to benot less than 50 m away from the accommodation area,control room, etc. In particular cases, suitable barriers, forexample sprayed water, may be used to reduce the volumeaffected by the combustion activity of flares.

3.1.3 Means are to be provided to allow the combustion tobe activated by remote control, to intercept the delivery ofhydrocarbons in time and to send inert gas into the gaseoushydrocarbon piping inlet to the flare.

4 Plants with burners for the combus-tion of hydrocarbons

4.1

4.1.1 Plants with burners for the combustion of hydrocar-bons are to be designed according to recognised standardsand installed so as not to cause hazards on board.

4.1.2 The combustion chamber is to be installed in theopen, in a safe zone. A quick locking valve is to be installedon the hydrocarbon inlet pipe in the cargo area.

4.1.3 When determining the position of the discharginginto the atmosphere of the gases combusted, their tempera-ture during the maximum combustion activity foreseen is tobe taken into account.In order to lower the temperature of the exhaust gases,water-cooling systems may be provided. Discharge into theatmosphere is to take place using spark arrestor screens.

4.1.4 In order to start the combustion, an oil fired pilotburner is, as a rule, to be provided. The absence of flame inthe combustion chamber is to cause the flow of diesel oiland hydrocarbons to the burners to be automaticallystopped and the purging, using inert gas, of the section ofgas piping after the valve mentioned in [4.1.2].

4.1.5 Suitable insulation is to be provided such as toensure the safety of the crew and protect the materials fromexcessively high temperatures.

5 Boilers and pressure vessels

5.1

5.1.1 Boilers, associated safety valves and relevant controland monitoring systems and pressure vessels in general areto be built in accordance with the requirements of Pt C,Ch 1, Sec 3 of the Rules for the Classification of Ships.


Chapter 6

5.1.2 Any cargo tanks and process pressure vessel for liq-uefied gases and associated safety valves and control andmonitoring systems are to be built in accordance with therequirements of Pt E Ch 9 Sec 4, 5 8 and 13 of the Rules forthe Classification of Ships and the relevant provisions ofCh 4, 5, 8 and 13 of the IGC Code.

6 Piping systems (except hydrocar-bon processing plants)

6.1

6.1.1 The piping systems listed below are to be built inaccordance with the requirements of Pt C Ch 1 Sec 10 ofthe Rules for the Classification of Ships:

a) piping for bilge and ballast operations within machineryspaces;

b) piping for the loading, off-loading, transfer and serviceof fuel oil;

c) piping for lubricating oil;

d) piping for sounding, air and overflow;

e) piping for the cooling water of machinery;

f) piping for compressed air;

g) piping for steam and steam discharge;

h) piping for feed water to boilers;

i) hydraulic systems.

6.1.2 The piping systems listed below on units intended foroils are to be built in accordance with the requirements ofPt E Ch 7 Sec 4 of the Rules for the Classification of Ships:

a) piping for the segregated ballast system;

b) piping for bilge and ballast systems outside machineryspaces (cargo area);

c) steam, hot water and thermal oil heating systems.

6.1.3 Piping systems for bilge and ballast systems outsidemachinery spaces (cargo area) on units intended for LPGand LNG are to be built in accordance with the require-ments of Pt E Ch 9 Sec 3 of the Rules for the Classification ofShips and the relevant provisions of Ch 3 of the IGC Code.

7 Processing plants

7.1 Oil processing and handling plants

7.1.1 Oil processing plants are to be designed in accord-ance with recognised Codes, with any modifications madenecessary so as to take into account their installation onfloating units.Oil handling and cargo tank venting systems are to complywith Pt E, Ch 7, Sec 4 of the Rules for the Classification ofShips.

7.2 LPG and LNG processing and handling plants

7.2.1 LPG and LNG processing and handling systems,including cargo tank and process venting systems, are tocomply with Pt E, Ch 9, Sec 5 and 8 of the Rules for theClassification of Ships and the relevant provisions of Ch 5and 8 of the IGC Code.As an alternative to these requirements, RINA may considerthe acceptance of recognised standards, provided that theyare deemed to be equivalent to the satisfaction of RINA.

8 Plants for the use of LNG as fuel

8.1

8.1.1 The use of LNG as fuel for boilers, diesel enginesand gas turbines is to comply with Pt E, Ch 9, Sec 16 of theRules for the Classification of Ships and the relevant provi-sions of Ch 16 of the IGC Code.

9 Cargo hoses

9.1

9.1.1 Hoses for the handling of hydrocarbon cargo are tocomply with the RINA "Rules for the type approval of flexi-ble hoses and expansion joints". Alternatively, other recog-nised standards, such as those referred to in the "Standardsfor Equipment employed in the Moorings of Ships at SinglePoint Moorings", may be adopted.Hoses for the handling of LPG/LNG cargoes are to complywith Ch 5 of the IGC Code.

9.1.2 Hoses for the handling of the cargo are to be sur-veyed at least once a month and tested at least once a yearby an expert on board the unit.


Chapter 7

CHAPTER 7 ELECTRICAL INSTALLATIONS

1 General

1.1 Application

1.1.1 The requirements in this Section apply in addition tothose contained in Part C, Chapter 2 of the Rules for theClassification of Ships.

1.2 Documentation to be submitted

1.2.1 In addition to the documents requested in Pt C, Ch2, Sec 1, Tab 1 of the Rules for the Classification of Ships,the following are to be submitted for approval:

a) plan of hazardous areas

b) document giving details of types of cables and safetycharacteristics of the equipment installed in hazardousareas

c) diagrams of tank level indicator systems, high levelalarm systems and overflow control systems whererequested.

1.3 System of supply

1.3.1 Acceptable systems of supplyThe following systems of generation and distribution ofelectrical energy are acceptable:

a) direct current:• two-wire insulated

b) alternating current:• single-phase, two-wire insulated• three-phase, three-wire insulated.

In insulated distribution systems, no current carrying part isto be earthed, other than:

a) through an insulation level monitoring device

b) through components used for the suppression of inter-ference in radio circuits.

1.3.2 Earthed system with hull returnEarthed systems with hull return are not permitted, with thefollowing exceptions to the satisfaction of RINA:

a) impressed current cathodic protective systems;

b) limited and locally earthed systems, such as starting andignition systems of internal combustion engines, pro-vided that any possible resulting current does not flowdirectly through any hazardous area;

c) insulation level monitoring devices, provided that thecirculation current of the device does not exceed 30 mAunder the most unfavourable conditions.

1.3.3 Earthed systems without hull returnEarthed systems without hull return are not permitted, withthe following exceptions:

a) earthed intrinsically safe circuits and the following othersystems to the satisfaction of RINA;

b) power supplies, control circuits and instrumentation cir-cuits in non-hazardous areas where technical or safetyreasons preclude the use of a system with no connec-tion to earth, provided the current in the hull is limitedto not more than 5 A in both normal and fault condi-tions; or

c) limited and locally earthed systems, such as power dis-tribution systems in galleys and laundries to be fedthrough isolating transformers with the secondary wind-ings earthed, provided that any possible resulting hullcurrent does not flow directly through any hazardousarea; or

d) alternating current power networks of 1000 V root meansquare (line to line) and over, provided that any possibleresulting current does not flow directly through any haz-ardous area; to this end, if the distribution system isextended to areas remote from the machinery space,isolating transformers or other adequate means are to beprovided.

1.4 Earth detection

1.4.1 Monitoring of circuits in hazardous areas

The devices intended to continuously monitor the insula-tion level of all distribution systems are also to monitor allcircuits, other than intrinsically safe circuits, connected toapparatus in hazardous areas or passing through such areas.An audible and visual alarm is to be given, at a mannedposition, in the event of an abnormally low level of insula-tion.

1.5 Electrical installation precautions

1.5.1 Precautions against inlet of gases or vapours

Suitable arrangements are to be provided, to the satisfactionof RINA, so as to prevent the possibility of gases or vapourspassing from a gas-dangerous space to another spacethrough runs of cables or their conduits.

2 Hazardous location classification

2.1 General

2.1.1 Classification of hazardous areas in ZONES isdefined in Pt C, Ch 2, Sec 1 [3.24] of the Rules for the Clas-sification of Ships.

2.1.2 Release as a result of accidental events such as blow-out or vessel rupture is not addressed by area classification.

It is to be covered by emergency measures.


Chapter 7

2.1.3 Openings, penetrations or connections betweenareas of different hazardous area classification are to beavoided, e.g. through ventilation systems, air pipes or drainsystems.

2.1.4 Except for operational reasons, access doors or otheropenings are not to be provided between a non-hazardousspace and a hazardous area or between a zone 2 space anda zone 1 space. Where such access doors or other openingsare provided, any non-hazardous enclosed space having adirect access to any zone 1 location or zone 2 locationbecomes the same zone as the location except that:

a) an enclosed space with direct access to any zone 1location can be considered as zone 2 if:

• the access is fitted with a gastight door opening intothe zone 2 space, and

• ventilation is such that the air flow with the dooropen is from the zone 2 space into the zone 1 loca-tion, and

• loss of ventilation is alarmed at a manned station;

b) an enclosed space with direct access to any zone 2location is not considered hazardous if:

• the access is fitted with a self-closing gastight doorthat opens into the non-hazardous location, and

• ventilation is such that the air flow with the dooropen is from the non-hazardous space into the zone2 location, and

• loss of ventilation is alarmed at a manned station;

c) an enclosed space with direct access to any zone 1location is not considered hazardous if:

• the access is fitted with self-closing gastight doorsforming an airlock, and

• the space has ventilation overpressure in relation tothe hazardous space, and

• loss of ventilation overpressure is alarmed at amanned station.

Where ventilation arrangements for the intended safe spaceare considered sufficient by RINA to prevent any ingress ofgas from the zone 1 location, the two self-closing doorsforming an airlock may be replaced by a single self-closinggastight door which opens into the non-hazardous locationand has no hold-back device.

2.1.5 Pyping systems are to be designed to preclude directcommunication between hazardous areas of different clas-sifications and between hazardous and non-hazardousareas.

2.2 Ventilation

2.2.1 For requirements of ventilation systems in hazardousareas, see Ch 9, [3.5].

2.3 Protection in overpressure

2.3.1 For requirements relevant to protection in overpres-sure, see Ch 9, [3.6].

3 Electrical equipment permitted in gas-dangerous spaces and areas

3.1 General

3.1.1 Electrical equipment and cables installed in hazard-ous areas are to be limited to those necessary for opera-tional purposes.

Portable electrical equipment, supplied by cables is not per-mitted in hazardous areas.

3.2 Electrical cables

3.2.1 Electrical cables are not to be installed in hazardousareas except when specifically permitted or associated withintrinsically safe circuits.

3.2.2 All cables installed in Zone 0, Zone 1 and weatherexposed areas classified Zone 2 are to be sheathed with atleast one of the following:

a) a non-metallic impervious sheath in combination withbraiding or other metallic covering

b) a copper or stainless steel sheath (for mineral insulatedcables only).

3.2.3 All cables installed in non-weather exposed Zone 2areas are to be provided with at least a non-metallic exter-nal impervious sheath.

3.2.4 Cables of intrinsically safe circuits are to have ametallic shielding with at least a non-metallic externalimpervious sheath.

3.2.5 The circuits of a category "ib" intrinsically safe sys-tem are not to be contained in a cable associated with a cat-egory "ia" intrinsically safe system required for a hazardousarea in which only category "ia" systems are permitted.

3.2.6 The cross-section of cables installed in hazardousareas is to be correlated to the characteristics time/currentof the relevant electrical protective device in order to limitthe surface temperature of the cable to a safety valueobliged by the temperature class of the dangerous gas likelyto be present in the area, under the most severe expectedfault condition.

3.3 FSRU

3.3.1 For FSRU the electrical equipment specified in Tab 1may be installed in gas-dangerous spaces and areas indi-cated therein.

3.3.2 Enclosed or semi-enclosed spaces (not containing asource of hazard) having a direct opening, including thosefor ventilation, into any hazardous area are to be designatedas the same hazardous zone as the area in which the open-ing is located. See also [2.1.3] and [2.1.4].

Electrical installations are to comply with the requirementsfor the space or area into which the opening leads.

3.3.3 Electrical installations in spaces protected by air-locks are to be of a certified safe type unless arranged to bede-energised upon loss of overpressure in the space.


Chapter 7

3.3.4 Submerged cargo pumps are not permitted in con-nection with the following cargoes:

• diethyl ether;

• vinyl ethyl ether;

• ethylene oxide;• propylene oxide;• mixtures of ethylene oxide and propylene oxide.

Table 1 : Electrical equipment permitted in gas-dangerous of zones FSRU

Hazard-ous area

SpacesElectrical equipment

N° Description

Zone 0 1 Cargo containment systems. a) certified intrinsically safe apparatus Ex(ia);

b) simple electrical apparatus and components (e.g. thermocouples, pho-tocells, strain gauges, switching devices), included in intrinsically safe circuits of category “ia” not capable of storing or generating electrical power or energy in excess of limits stated in the relevant standards;

c) equipment specifically designed and certified by the appropriate authority for use in Zone 0;

d) submerged cargo pump motors and their supply cables may be fitted in cargo containment systems.

Zone 0 2 Hold spaces where cargo is carried in a cargo containment system requiring a secondary barrier.

a) certified intrinsically safe apparatus Ex(ia);

b) simple electrical apparatus and components (e.g. thermocouples, pho-tocells, strain gauges, switching devices), included in intrinsically safe circuits of category “ia” not capable of storing or generating electrical power or energy in excess of limits stated in the relevant standards;

c) equipment specifically designed and certified by the appropriate authority for use in Zone 0;

d) supply cables for submerged cargo pump motors.

Zone 1 3 Hold spaces where cargo is carried in a cargo containment system not requir-ing a secondary barrier

a) any type considered for Zone 0;

b) certified intrinsically safe apparatus Ex(ib);

c) simple electrical apparatus and components (e.g. thermocouples, pho-tocells, strain gauges, switching devices), included in intrinsically safe circuits of category “ib” not capable of storing or generating electrical power or energy in excess of limits stated in the relevant standards;

d) based on electrical cables passing through the spaces.

e) lighting fittings are to have pressurised enclosures Ex(p) or to be of the flameproof type Ex(d). The lighting system is to be divided between at least two branch circuits.All switches and protective devices are to interrupt all poles or phases and are to be located in a gas-safe space;

f) based on hull fittings containing the terminals or shell plating penetra-tions for anodes or electrodes of an impressed current cathodic protec-tion system, or transducers such as those for depth sounding or log systems, provided that such fittings are of gas-tight construction or housed within a gas-tight enclosure and are not located adjacent to a cargo tank bulkhead. The design of such fittings or their enclosures and the means by which cables enter, and any testing to establish their gas-tightness, are to be to the satisfaction of RINA.

Zone 1 4 Spaces separated from a hold space where cargo is carried in a cargo con-tainment system requiring a secondary barrier by a single gas-tight steel boundary.

a) any type considered for spaces under item 3;

b) flameproof motors for valve operation for cargo or ballast systems;

c) flameproof general alarm audible indicators.


Chapter 7

Zone 1 5 Cargo pump and cargo compressor rooms.




d) lighting fittings are to have pressurised enclosures Ex(p) or to be of the flameproof type Ex(d). The lighting system is to be divided between at least two branch circuits.All switches and protective devices are to interrupt all poles or phases and are to be located in a gas-safe space.

e) electric motors for driving cargo pumps or cargo compressors are to be separated from these spaces by a gas-tight bulkhead or deck. Flexible couplings or other means of maintaining alignment are to be fitted to the shafts between the driven equipment and its motors and, in addi-tion, suitable glands are to be provided where the shafts pass through the bulkhead or deck. Such electric motors and associated equipment are to be located in a compartment complying with Chapter 12 of the IGC Code;

f) where operational or structural requirements are such as to make it impossible to comply with the method described in e), motors of the following certified safe types may be installed:• increased safety type with flameproof enclosure Ex(de); and• pressurised type.

g) based on certified safe type visual and/or acoustic indicators (e.g. for general alarm, fire-extinguishing media alarm, etc.);

h) certified safe type sensors for gas detection systems.

Zone 1 6 Zones on open deck or non-enclosed spaces on the open deck, within 3 m of any cargo tank outlet, gas or vapour outlet, cargo pipe flange, cargo valve or entrances and ventilation openings to cargo pump rooms and cargo com-pressor rooms.




d) certified flameproof Ex(d);

e) certified pressurised Ex(p);

f) certified increased safety Ex(e);

g) certified encapsulated Ex(m);

h) certified sand filled Ex(q);

i) certified specially Ex(s);

j) electrical cables passing through the spaces.

Zone 1 7 Zones on the open deck over the cargo area and 3 m forward and aft of the cargo area on the open deck and up to a height of 2,4 m above the deck.

As allowed for spaces under item 6.

Zone 1 8 Zones within 2,4 m of the outer surface of a cargo containment system where such surface is exposed to the weather.


Zone 1 9 Areas on open deck, or semi-enclosed spaces on open deck, within 9 m of any cargo tank pressure relief valve vent exits, entrances and ventilation openings to cargo pump rooms, cargo compressor rooms and other enclosed hazardous spaces.


Hazard-ous area


N° Description


Chapter 7

3.3.5

a) Where submerged electric motors are employed, meansare to be provided, e.g. by the arrangements specified inparagraph 17.6 of the IGC Code, to avoid the formationof explosive mixtures during loading, cargo transfer andunloading.

b) Arrangements are to be made to automatically shutdown the motors in the event of low liquid level. Thismay be accomplished by sensing low pump dischargepressure, low motor current, or low liquid level. Thisshutdown is to be alarmed at the cargo control station.Cargo pump motors are to be capable of being isolatedfrom their electrical supply during gas-freeing opera-tions.

3.3.6 Temperature class and explosion groupTab 2 specifies temperature class and explosion group datafor some products. The data shown in brackets have beenderived from similar products.

3.4 FPSO, FPO and FSO

3.4.1 For FPSO, FPO and FSO the electrical equipmentspecified in Tab 3, Tab 4, Tab 5 as applicable may beinstalled in gas-dangerous spaces and areas indicatedtherein.

3.4.2 The explosion group and temperature class of elec-trical equipment of a certified safe type are to be at least IIAand T3.

Zone 1 10 Compartments for cargo hoses. a) any type considered for Zone 0;



d) lighting fittings are to have pressurised enclosures Ex(p) or to be of the flameproof type Ex(d). The lighting system is to be divided between at least two branch circuits.All switches and protective devices are to interrupt all poles or phases and are to be located in a gas-safe space.

e) based on electrical cables passing through the spaces.

Zone 1 11 Enclosed or semi-enclosed spaces in which pipes containing cargoes are located.


Zone 2 12 Areas of 1,5 m surrounding the Zone 1 spaces defined in item 6, 7 and 9.


b) electrical equipment of a type which ensures the absence of sparks, arcs and "hot spots" during its normal operation;

c) electrical equipment tested specially for Zone 2 (e.g. type "n" protec-tion);

d) electrical equipment encapsulated and acceptable to RINA.

Zone 2 13 Air-locks. As allowed for spaces under item 12.

Hazard-ous area


N° Description


Chapter 7

Table 2 : Temperature class and explosion group of certain products

Product nameTemperature

classExplosion

groupProduct name

Temperature class

Explosion group

Acetaldehyde T4 II A Methane T2 II A

Ammonia anhydrous T1 II A Methyl acetylene propadiene mixture

T4 II A

Butadiene T2 II B Methyl bromide T3 II A

Butane T2 II A Methyl chloride T1 II A

Butane/propane mixture T2 II A Monoethylamine T2 II A

Butylenes T3 II A Nitrogen NF NF

Chlorine NF NF Pentane (all isomers) (T2) (II A)

Diethyl ether T4 II B Pentene (all isomers) (T3) (II B)

Dimethylamine T2 II A Propane T2 II A

Ethane T2 II A Propylene T2 II B

Ethyl chloride T2 II A Propylene oxide T2 II B

Ethylene T2 II B Refrigerant gases NF NF

Ethylene oxide T2 II B Sulphur dioxide (T3) (II B)

Ethylene oxide propylene oxide mixture (max. 30% mass/mass ethylene oxide)

T2 II B Vinyl chloride T2 II A

Isoprene T3 II B Vinyl ethyl ether T3 II B

Isopropylamine T2 II A Vinylidene chloride T2 II A


Chapter 7

Table 3 : Electrical equipment permitted in gas-dangerous zones for FPSO, FPO and FSO with flammable liquids having a flashpoint not exceeding 60°C

Hazard-ous area


N° Description

Zone 0 1 Interior of cargo tanks, slop tanks, any pipework of pressure relief or other venting systems for cargo and slop tanks, pipes and equipment con-taining cargo or developing flammable gases or vapours.

a) certified intrinsically safe apparatus Ex(ia);

b) simple electrical apparatus and components (e.g. thermocou-ples, photocells, strain gauges, switching devices), included in intrinsically safe circuits of category “ia” not capable of storing or generating electrical power or energy in excess of limits stated in the relevant standards

c) equipment specifically designed and certified by the appro-priate authority for use in Zone 0.

Zone 1 2 Void spaces adjacent to, above or below integral cargo tanks.



c) simple electrical apparatus and components (e.g. thermocou-ples, photocells, strain gauges, switching devices), included in intrinsically safe circuits of category “ib” not capable of storing or generating electrical power or energy in excess of limits stated in the relevant standards;

d) hull fittings containing the terminals or shell plating penetra-tions for anodes or electrodes of an impressed current cathodic protection system, or transducers such as those for depth sounding or log systems, provided that such fittings are of gas-tight construction or housed within a gas-tight enclo-sure and are not located adjacent to a cargo tank bulkhead. The design of such fittings or their enclosures and the means by which cables enter, as well as any testing to establish their gas-tightness, are to be to the satisfaction of RINA. The asso-ciated cables are to be protected as indicated in item e);

e) electrical cables passing through the spaces. Such cables are to be installed in heavy gauge steel pipes with gas-tight joints.Expansion bends are not to be fitted in these spaces.

Zone 1 3 Hold spaces containing independent cargo tanks.




d) pressurised (Exp) or flameproof (Exd) lighting fittings divided between at least two independent final sub-circuits. All switches and protective devices are to interrupt all poles or phases and are to be located in a non-hazardous area;

e) hull fittings containing the terminals or shell plating penetra-tions for anodes or electrodes of an impressed current cathodic protection system, or transducers such as those for depth sounding or log systems, provided that such fittings are of gas-tight construction or housed within a gas-tight enclo-sure and are not located adjacent to a cargo tank bulkhead. The design of such fittings or their enclosures and the means by which cables enter, as well as any testing to establish their gas-tightness, are to be to the satisfaction of RINA;

f) electrical cables passing through the spaces.


Chapter 7

Zone 1 4 Cofferdams and permanent (for example, segre-gated) ballast tanks adjacent to cargo tanks.




d) hull fittings containing the terminals or shell plating penetra-tions for anodes or electrodes of an impressed current cathodic protection system, or transducers such as those for depth sounding or log systems, provided that such fittings are of gas-tight construction or housed within a gas-tight enclo-sure and are not located adjacent to a cargo tank bulkhead. The design of such fittings or their enclosures and the means by which cables enter, as well as any testing to establish their gas-tightness, are to be to the satisfaction of RINA. The asso-ciated cables are to be protected as indicated in item e);

e) electrical cables passing through the spaces. Such cables are to be installed in heavy gauge steel pipes with gas-tight joints. Expansion bends are not to be fitted in these spaces.Corrosion-resistant pipes, providing adequate mechanical protection, are to be used in compartments which may be filled with sea water (e.g. permanent ballast tanks).

Hazard-ous area


N° Description


Chapter 7

Zone 1 5 Cargo pump rooms. a) any type considered for Zone 0;



d) hull fittings containing the terminals or shell plating penetra-tions for anodes or electrodes of an impressed current cathodic protection system, or transducers such as those for depth sounding or log systems, provided that such fittings are of gas-tight construction or housed within a gas-tight enclo-sure and are not located adjacent to a cargo tank bulkhead. The design of such fittings or their enclosures and the means by which cables enter, as well as any testing to establish their gas-tightness, are to be to the satisfaction of RINA. The asso-ciated cables are to be protected as indicated in item g);

e) pressurised (Exp) or flameproof (Exd) lighting fittings divided between at least two independent final sub-circuits.All switches and protective devices are to interrupt all poles or phases and are to be located in a non-hazardous area.The lighting fittings, switches and protective devices are to be suitably labelled for identification purposes.The normal lighting system is to be interlocked with ventila-tion such that the latter is in operation to energise the light-ing. Failure of the ventilation system is not to cause the lighting to go out. The emergency lighting system is not to be interlocked;

f) certified safe type visual and/or acoustic indicators (e.g. for general alarm, fire-extinguishing media alarm, etc.);

g) certified safe type sensors for gas detection systems;

h) cables, other than those supplying lighting fittings and those of intrinsically safe circuits, where it is necessary for them to pass through cargo pump rooms. Such cables are to be installed in heavy gauge steel pipes with gas-tight joints.

Hazard-ous area


N° Description


Chapter 7

Zone 1 6 Enclosed or semi-enclosed spaces immediately above cargo tanks (e.g. ‘tweendecks) or having bulkheads above and in line with cargo tank bulkheads, unless protected by a diagonal plate acceptable to RINA.



c) simple electrical apparatus and components (e.g. thermocou-ples, photocells, strain gauges, switching devices), included in intrinsically safe circuits of category "ib" not capable of storing or generating electrical power or energy in excess of limits stated in the relevant IEC or EN Standards;

d) certified safe type lighting fittings divided between at least two independent final sub-circuits.All switches and protective devices are to interrupt all poles or phases and are to be located in a non-hazardous area.The lighting fittings, switches and protective devices are to be suitably labelled for identification purposes;

e) electrical cables passing through the spaces;

f) in ‘tweendeck spaces immediately above cargo tanks, any electrical equipment other than that in (a), (b), (c) and (d), provided that it is housed in a compartment:• which is suitably mechanically ventilated,• having access solely from the deck above,• whose floor is separated from the cargo tanks by a coffer-

dam,• whose boundaries are oil-tight and gas-tight with respect

to the cofferdam and the ‘tweendeck spaces.

Zone 1 7 Enclosed or semi-enclosed spaces immediately above cargo pump rooms or above vertical cof-ferdams adjacent to cargo tanks, unless sepa-rated by a gas-tight deck and suitably ventilated.




d) certified safe type lighting fittings divided between at least two independent final sub-circuits.All switches and protective devices are to interrupt all poles or phases and are to be located in a non-hazardous area.The lighting fittings, switches and protective devices are to be suitably labelled for identification purposes;

e) electrical cables passing through the spaces.

Hazard-ous area


N° Description


Chapter 7

Zone 1 8 Spaces other than cofferdams, adjacent to and below the top of a cargo tank (e.g. trunks, pas-sageways and holds) as well as double bottoms and pipe tunnels below cargo tanks.




d) hull fittings containing the terminals or shell plating penetra-tions for anodes or electrodes of an impressed current cathodic protection system, or transducers such as those for depth sounding or log systems, provided that such fittings are of gas-tight construction or housed within a gas-tight enclo-sure and are not located adjacent to a cargo tank bulkhead. The design of such fittings or their enclosures and the means by which cables enter, as well as any testing to establish their gas-tightness, are to be to the satisfaction of RINA. The asso-ciated cables are to be protected as indicated in item f);

e) pressurised (Exp) or flameproof (Exd) lighting fittings divided between at least two independent final sub-circuits.All switches and protective devices are to interrupt all poles or phases and are to be located in a non-hazardous area.The lighting fittings, switches and protective devices are to be suitably labelled for identification purposes;

f) electrical cables passing through the spaces; through-runs of cables, with the exception of those for intrinsically safe appa-ratus, will be specially considered by RINA.

Zone 1 9 Areas on open deck, or semi-enclosed spaces on open deck, within 3m of any cargo tank outlet (tank hatches, sight ports, tank cleaning open-ings, ullage openings, sounding pipes etc.), cargo manifold valves, cargo valves, cargo pipe flanges, cargo pump room and other enclosed hazardous space entrance(s) and ventilation out-lets, and cargo tank ventilation outlets and cargo tank openings for pressure release provided to permit the flow of small volumes of gas or vapour mixtures caused by thermal variation.




d) certified flameproof Ex(d);

e) certified pressurised Ex(p);

f) certified increased safety Ex(e);

g) certified encapsulated Ex(m);

h) certified sand filled Ex(q);

i) certified specially Ex(s);

j) electrical cables passing through the spaces.Expansion bends are not to be fitted in these spaces.

Zone 1 10 Areas on open deck, or semi-enclosed spaces on open deck, above and in the vicinity of any cargo gas outlet intended for the passage of large volumes of gas or vapour mixture during cargo loading and ballasting or during discharging, within a vertical cylinder of unlimited height and 6m radius centred upon the centre of the outlet, and within a hemisphere of 6m radius below the outlet.


Zone 1 11 Areas on open deck, or semi-enclosed spaces on open deck, within 1,5m of cargo pump room entrances, cargo pump room ventilation inlets, openings into cofferdams or other Zone 1 spaces.


Hazard-ous area


N° Description


Chapter 7

Zone 1 12 Areas on open deck within 3m of spillage coam-ings surrounding cargo manifold connections.


Zone 1 13 Areas on open deck over all cargo tanks (includ-ing all ballast tanks within the cargo tank area) where structures are restricting the natural venti-lation and to the full breadth of the ship plus 3m fore and aft of the forward-most and aft-most cargo tank bulkhead, up to a height of 2,4m above the deck.

As allowed for spaces under item 9 except that expansion bends are allowed in these areas.

Zone 1 14 Compartments for cargo hoses. As allowed for spaces under item 7.

Zone 1 15 Enclosed or semi-enclosed spaces in which pipes containing cargoes are located.


Zone 2 16 Areas of 1,5 m surrounding the Zone 1 spaces defined in item 9.



c) electrical equipment tested specially for Zone 2 (e.g. type "n" protection);

d) electrical equipment encapsulated and acceptable to RINA.

Zone 2 17 Areas 4m beyond the cylinder and 4m beyond the sphere defined in item 10.


Zone 2 18 Areas on open deck extending to the coamings fitted to keep any spills on deck and away from the accommodation and service areas and 3m beyond these up to a height of 2,4m above the deck.


Zone 2 19 Areas on open deck over all cargo tanks (includ-ing all ballast tanks within the cargo tank area) where unrestricted natural ventilation is guaran-teed and to the full breadth of the ship plus 3m fore and aft of the forward-most and aft-most cargo tank bulkhead, up to a height of 2,4m above the deck surrounding open or semi-enclosed spaces of Zone 1.


Zone 2 20 Spaces forward of the open deck areas to which reference is made in item 13 and item 19, below the level of the main deck, and having an open-ing on the main deck or at a level less than 0,5m above the main deck, unless:

a) the entrances to such spaces do not face the cargo tank area and, together with all other openings to the spaces, including ventilation system inlets and exhausts, are situated at least 5m from the foremost cargo tank and at least 10m measured horizontally from any cargo tank outlet or gas or vapour outlet; and

b) the spaces are mechanically ventilated.


Hazard-ous area


N° Description


Chapter 7

Table 4 : Electrical equipment permitted in gas-dangerous zones for FPSO, FPO and FSO flammable liquids having a flashpoint exceeding 60°C unheated or heated to a temperature below and not within 15°C of their flashpoint

Table 5 : Electrical equipment permitted in gas-dangerous zones for FPSO, FPO and FSO flammable liquid shaving a flashpoint exceeding 60°C heated to a temperature within 15°C of their flashpoint

Hazardous area


N° Description

Zone 1 1 Interior of cargo tanks, slop tanks, any pipework of pressure relief or other venting systems for cargo and slop tanks, pipes and equipment containing cargo or developing flammable gases or vapours.

a) certified intrinsically safe apparatus Ex(ia) or Ex(ib);

b) simple electrical apparatus and components (e.g. thermocouples, photo-cells, strain gauges, switching devices), included in intrinsically safe cir-cuits of category “ia” or “ib” not capable of storing or generating electrical power or energy in excess of limits stated in the relevant standards;

c) electrical cables passing through the spaces. Such cables are to be installed in heavy gauge steel pipes with gas-tight joints.Expansion bends are not to be fitted in these spaces.

Zone 2 2 Cargo pump rooms. a) any type considered for Zone 1;


c) electrical equipment tested specially for Zone 2 (e.g. type "n" protection);

d) electrical equipment for use in an explosive gas-air mixture with type of protection by total encapsulation "m".

Hazardous area


N° Description

Zone 0 1 Cargo tanks and cargo piping. a) certified intrinsically safe apparatus Ex(ia);

b) simple electrical apparatus and components (e.g. thermocouples, photo-cells, strain gauges, switching devices), included in intrinsically safe cir-cuits of category “ia” not capable of storing or generating electrical power or energy in excess of limits stated in the relevant standards;

Zone 1 2 Cargo pump rooms. a) electrical equipment of a certified safe type.

Zone 1 3 Areas on open deck, or semi-enclosed spaces on open deck, within 3 m of openings from tanks where the cargo is heated.

a) electrical equipment of a certified safe type.

Zone 1 4 Areas on open deck, or semi-enclosed spaces on open deck, within 3 m of the entrance or ventilation opening to cargo pump rooms and other enclosed hazardous spaces.

a) electrical equipment of a certified safe type.


Chapter 8

CHAPTER 8 SAFETY ARRANGEMENTS

1 General

1.1

1.1.1 Emergency shutdown systems are to be providedagainst hazardous events.

2 Definition

2.1

2.1.1 An emergency shutdown system (ESD) includes:

a) manual input devices (push buttons)

b) interfaces towards other safety systems, e.g.:

• fire detection system

• gas detection system

• alarm and communication systems

• process shutdown system

• fire-fighting systems

• ventilation systems

c) a central control unit receiving and evaluating signalsfrom the manual input devices and the interfaced sys-tems, and creating output signals to devices that are tobe shut down or activated. The ESD central control unitis to include a device providing visual indication of ini-tiated inputs and activated outputs and a local audiblealarm

d) output actuators, e.g. relays, valves and dampers,including status indicators

e) signal transfer lines between the ESD central controlunit and all input devices, interfaced systems and outputactuators

f) power supply.

2.1.2 In the context of this section, 'circuit' is defined asany signal transfer facility, e.g. electrical, pneumatic,hydraulic, optical or acoustic.

2.1.3 A normally energised circuit is a circuit whereenergy is present, e.g. an electrical current or pneumatic orhydraulic pressure, when the circuit is not activated by theshutdown system.

2.1.4 A normally de-energised circuit is a circuit whereenergy is not present when the circuit is not activated by theshutdown system.

3 Drawings to be submitted

3.1

3.1.1 The following are to be submitted for approval:

a) cause and effect diagram;

b) diagram of emergency shutdown circuits.

4 Basic principles

4.1

4.1.1 The system is to be designed so that the risk of un-intentional shutdown caused by malfunction or inadvertentoperation is minimised.

4.1.2 The system is to be designed to allow testing withoutinterrupting other systems on board.

4.1.3 The central control unit is to be located in a non-hazardous and continuously manned area.

4.1.4 The system is to be powered from a monitored Unin-terruptible Power Supply (UPS) capable of at least 30 min-utes continuous operation on loss of its electrical powersupply systems. The UPS is to be powered from both themain and the emergency power system.

5 Functional requirements

5.1

5.1.1 Upon failure of the shutdown system, all connectedsystems are to default to the safest condition for the unit orinstallation.

5.1.2 The safest conditions for the systems on board is tobe defined.

5.1.3 Failures to be considered for the shutdown systemare to include broken connections and short-circuits oninput and output circuits, loss of power supply and, if rele-vant, loss of communication with other systems.

5.1.4 For a shutdown system with only normally energizedoutputs, all inputs are to be normally energized.

5.1.5 For a shutdown system with one or more normallyde-energized outputs, all inputs able to activate a normallyde-energized output are to be normally de-energized.

5.1.6 All normally de-energized input and output circuitsare to be monitored for broken connection and short-cir-cuit.


Chapter 8

5.1.7 Shutdown is not to result in adverse cascade effects,which depends on activation of other protection devices tomaintain a plant in a safe condition. The shutdown systemis to be designed to ensure that any ongoing operations canbe terminated safely when a shutdown is activated.

5.1.8 Shutdown is not to require unrealistically quick orcomplex intervention by the operator.

5.1.9 Shutdowns on a hierarchical level are automaticallyto include shutdowns on lower levels.

5.1.10 Shutdown is to initiate alarm at the control station.The initiating device and operating status of devicesaffected by the shutdown action are to be indicated at thecontrol station (e.g. valve position, unit tripped, etc.).

5.1.11 Personnel lifts, work platforms and other manridingequipment are to be designed to enable safe escape after anemergency shutdown, e.g. by controlled descent to anaccess point on a lower level.

5.1.12 Systems which are not permanently attended dur-ing operation, and which could endanger safety if they fail,are to be provided with automatic safety control, alert andalarm systems.

5.1.13 Plants that are protected by automatic safety sys-tems are to have pre-alarms to alert when operating param-eters are exceeding normal levels.

5.1.14 The shutdown commands are not to be automati-cally reset. Significant shutdown devices are to be resetlocally following recognition and reset at the main controlroom.

6 Automatic and manual shutdown

6.1

6.1.1 Shutdowns are normally to be automatically initi-ated, however solely manually initiated actions may be pro-vided where automatic action could be detrimental tosafety.

6.1.2 Alarms for manual initiation are to be clear and areto be readily identifiable at a permanently manned controlstation.

6.1.3 In all shutdown systems, it is to be possible to manu-ally activate all levels of shutdown at the control station.

6.1.4 Other manual shutdown buttons are to be located atstrategic locations on the unit or installation.

7 Electrical equipment for use in an emergency

7.1

7.1.1 The following systems are to be operable after aban-don unit shutdown:

a) emergency lighting, for half an hour at:

• every embarkation station on deck and over sides

• in all service and accommodation alleyways, stair-ways and exits, personnel lift cars, and personnel lifttrunks

• in machinery spaces and main generating stationsincluding their control positions

• in all control stations and machinery control rooms

b) general alarm

c) public address

d) battery supplied radio-communication.

7.1.2 Electrical equipment left operational after abandonunit shutdown is to be suitable for operation in zone 2 areaswith the exceptions given in [5.1.7].

7.1.3 Electrical equipment located in non-hazardous areasaffected by a gas release, which is left operational after gasdetection is to be suitable for zone 2, with the exceptionsgiven in [5.1.7].

7.1.4 Safety critical, uncertified electrical equipment maybe left operational after ESD or gas detection affecting itsarea of location, provided that:

• the ventilation to the room where the equipment islocated is isolated

• gas detectors are installed in the room where the equip-ment is located

• facilities for manual shutdown of the equipment areavailable.


Chapter 9

CHAPTER 9 FIRE PROTECTION


1.1 Application

1.1.1 As stated under item [1.1.2] of Chapter 1, therequirements of this Chapter 9, with the exception of items[3.5] and [3.6], are not applicable for the purpose of classi-fication, except where RINA carries out surveys relevant tofire protection statutory requirements on behalf of the flagAdministration. In such cases, fire protection statutoryrequirements are considered a matter of class and thereforecompliance with these requirements is also verified byRINA for classification purposes.

1.2 Documentation to be submitted

1.2.1 The plans to be submitted to RINA for examinationare those listed in Tab 1.

Other documentation may be requested depending on theunit's characteristics.

1.2.2 The attention of the Interested Parties is drawn topossible additional details, provisions and requirements ofGovernmental Authorities set forth depending on the size,type and intended service of the units. Special considera-tion is to be given to arrangements for structural fire protec-tion and to fire-extinguishing systems, which are to complywith the requirements of the Governmental Authority of theState in which the unit is registered.

1.3 Type approved products

1.3.1 The following materials, equipment, systems orproducts in general used for fire protection are to be typeapproved by RINA, except for special cases for which theacceptance may be given for individual ships on the basis ofsuitable documentation or ad hoc tests:

a) Fire-resisting and fire-retarding divisions (bulkheads ordecks) and associated doors

b) Materials for pipes penetrating "A" or "B" class divisions(where they are not of steel or other equivalent material)

c) Materials for oil or fuel oil pipes (where they are not ofsteel or copper and its alloys)

d) Bulkhead or deck penetrations for electrical cables andventilation systems passing through "A" or "B" class divi-sions

e) Materials with low flame spread characteristic, includ-ing paints, varnishes and similar, when they are requiredto have such characteristic

f) Non-combustible materials

g) Non-readily igniting materials for primary deck cover-ings

h) Fixed foam fire-extinguishing systems and associatedfoam-forming liquids

i) Fixed powder fire-extinguishing systems, including thepowder

j) Flexible pipes and expansion bellows of non-conven-tional material for any type of fluid

k) Sprinkler heads for automatic sprinkler systems

l) Nozzles for fixed pressure water-spraying fire-extin-guishing systems for machinery spaces, boiler rooms

and tank areas

m) Sensing heads for automatic fire alarm and fire detec-tion systems

n) Fixed fire detection and fire alarm systems

o) Explosive mixture detecting systems

p) Portable explosive mixture detecting apparatus

q) Fixed instruments for measuring the oxygen content forinert gas systems serving cargo tanks

r) Portable instruments for measuring the oxygen contentfor inert gas systems serving cargo tanks

s) Portable fire extinguishers

t) Large capacity fire extinguishers

u) Extinguishing media substitute for the foam in fire extin-guishers

v) Fire protective overalls

w) Breathing apparatus

x) Smoke helmets and smoke masks

y) Electric safety lamps

z) Lifelines

aa) Fire hoses

ab) Water fog applicators and nozzles, including dual pur-pose nozzles, for fire hoses

ac) Dry material substitute for sand in "sand receptacles"

ad) Fire dampers

ae) Emergency escape breathing devices

af) Portable foam applicators.

RINA may request type approval for other materials, equip-ment, systems or products required by the applicable provi-sions for ships or installations of special types.


Chapter 9

Table 1 : Documentation to be submitted

2 Definitions

2.1 General

2.1.1 In addition to the definitions given in Chapter 1, thefollowing also apply.

2.2 Accommodation spaces

2.2.1 Accommodation spaces are those spaces used forpublic spaces, corridors, stairways, lavatories, cabins,offices, hospitals, cinemas, games and hobbies rooms, pan-tries containing no cooking appliances and similar spaces.Public spaces are those portions of the accommodationwhich are used for halls, dining rooms, lounges and similarpermanently enclosed spaces.

No I/A (1) Document (2)

1 A Structural fire protection, showing the method of construction, the purpose of the various spaces of the ships, the fire rating of bulkheads and decks, the means of closing of openings in “A” and “B” class divisions and the draught stops

2 A Natural and mechanical ventilation systems showing the penetrations on “A” class divisions, location of dampers, means of closing, arrangements of air conditioning rooms

3 A Means of escape and, where required, the relevant dimensioning

4 A Automatic fire detection systems and manually operated call points

5 A Fire pumps and fire main including pump head and capacity, hydrant and hose locations

6 A Arrangement of fixed fire-extinguishing systems (2) and inert gas systems

7 A Arrangement of sprinkler or sprinkler equivalent systems including the capacity and head of the pumps (2)

8 A Fire-fighting equipment and firemen’s outfits (or fire control plans)

9 A Fixed fire-extinguishing system in scavenge spaces of two-stroke crosshead type engines (see Pt C, Ch 1, Sec 2, [2.5.1] of the Rules for the Classification of Ships)

10 A Fixed gas detection systems

11 A Electrical diagram of the fixed gas fire-extinguishing systems

12 A Electrical diagram of the sprinkler systems

13 A Electrical diagram of power control and position indication circuits for fire doors

14 I General arrangement plan

(1) A : to be submitted for approval, in four copies I : to be submitted for information, in duplicate.

(2) Plans are to be schematic and functional and to contain all information necessary for their correct interpretation and verifica-tion, such as:• service pressures• capacity and head of pumps and compressors, if any• materials and dimensions of piping and associated fittings• volumes of protected spaces, for gas and foam fire-extinguishing systems• surface areas of protected zones for automatic sprinkler and pressure water-spraying, low expansion foam and powder fire-

extinguishing systems• capacity, in volume and/or in mass, of vessels or bottles containing the extinguishing media or propelling gases, for gas,

automatic sprinkler, foam and powder fire-extinguishing systems• type, number and location of nozzles of extinguishing media for gas, automatic sprinkler, pressure water-spraying, foam and

powder fire-extinguishing systems.All or part of the information may be provided, instead of on the above plans, in suitable operating manuals or in specifications of the systems.


Chapter 9

2.3 A class divisions

2.3.1 A class divisions are those divisions formed by bulk-heads and decks which comply with the following criteria:

a) they are constructed of steel or other equivalent mate-rial;

b) they are suitably stiffened;

c) they are insulated with approved non-combustiblematerials such that the average temperature of the unex-posed side will not rise more than 140° C above theoriginal temperature, nor will the temperature, at anyone point, including any joint, rise more than 180° Cabove the original temperature, within the time listedbelow:

• class "A-60" ............................................60 min

• class "A-30" ...........................................30 min

• class "A-15"............................................15 min

• class "A-0"................................................0 min

d) they are so constructed as to be capable of preventingthe passage of smoke and flame to the end of the one-hour standard fire test; and

e) RINA will require a test of a prototype bulkhead or deckin accordance with the "Fire Test Procedures Code" (see[2.8]) to ensure that it meets the above requirements forintegrity or temperature rise.

2.3.2 The products indicated in Tab 2 may be installedwithout testing or approval.

2.4 B class divisions

2.4.1 "B" class divisions are those divisions formed bybulkheads, decks, ceilings or linings which comply with thefollowing criteria:

a) they are constructed of approved non-combustiblematerials and all materials entering into the constructionand erection of "B" class divisions are non-combustible,with the exception that combustible veneers may bepermitted provided they meet the other appropriaterequirements of this Chapter;

b) they have an insulation value such that the average tem-perature of the unexposed side will not rise more

than 140° C above the original temperature, nor will thetemperature at any one point, including any joint, rise

more than 225° C above the original temperature,within the time listed below:

• class "B-15" ..............................................15 min

• class "B-0" .................................................0 min

c) they are so constructed as to be capable of preventingthe passage of flame to the end of the first half hour ofthe standard fire test;

d) RINA will require a test of a prototype division inaccordance with the Fire Test Procedures Code (see[2.8]) to ensure that it meets the above requirements forintegrity or temperature rise.

2.5 C class divisions

2.5.1 C class divisions are constructed of approved non-combustible materials. They do not need to meet eitherrequirements relative to the passage of smoke and flame orlimitations relative to the temperature rise. Combustibleveneers are permitted provided they meet the requirementsof this Chapter.

2.6 Continuous B class ceilings or linings

2.6.1 Continuous "B" class ceilings or linings are those Bclass ceilings or linings which terminate at an A or B classdivision.

2.7 Control stations

2.7.1 Control stations are those spaces in which the unit'sradio or main navigating equipment or the emergencysource of power is located or where the fire recording or firecontrol equipment or the dynamically positioning controlsystem is centralized or where a fire-extinguishing systemserving various locations is situated. In the case of a col-umn-stabilized unit, a centralized ballast control station is a"control station".

Cargo control rooms, production control rooms and anyother location from which essential control for the unit'soperation is centralized are to be considered as "control sta-tions".

2.8 Fire Test Procedures Code

2.8.1 "Fire Test Procedures Code" means the "InternationalCode for Application of Fire Test Procedures", as adopted bythe Maritime Safety Committee of the IMO by ResolutionMSC.61 (67), as may be amended by the IMO.

Table 2

Classification Product description

class “A-0” bulkhead A steel bulkhead with dimensions not less than the minimum dimensions given below:• thickness of plating: 4 mm• stiffeners 60 x 60 x 5 mm spaced at 600 mm or structural equivalent

class “A-0” deck A steel bulkhead with dimensions not less than the minimum dimensions given below:• thickness of plating: 4 mm• stiffeners 95 x 65 x 7 mm spaced at 600 mm or structural equivalent


Chapter 9

2.9 Fire Safety Systems Code

2.9.1 "Fire Safety Systems Code" means the "InternationalCode for Fire Safety System", as adopted by the MaritimeSafety Committee of the IMO by Resolution MSC.98(73), asmay be amended by the IMO.

2.10 Enclosed spaces

2.10.1 Enclosed spaces are spaces bounded by floors,bulkheads and/or decks, which may have doors and/or win-dows.

2.11 Fuel oil unit

2.11.1 Fuel oil unit is the equipment used for the prepara-tion of fuel oil for delivery to an oil fired boiler, or equip-ment used for the preparation for delivery of heated oil toan internal combustion engine, and includes any oil pres-sure pumps, filters and heaters operating with oil at a pres-sure of more than 0,18 MPa.

2.11.2 Fuel oil unit includes any equipment used for thepreparation and delivery of fuel oil, whether or not heated,to boilers (including inert gas generators) and engines(including gas turbines) at a pressure of more than 0,18Mpa.

2.12 Hazardous areas

2.12.1 Hazardous areas are all those areas where, due tothe possible presence of a flammable atmosphere arisingfrom drilling operations, cargo operations or cargo storage,the use without proper consideration of machinery or elec-trical equipment may lead to fire hazard or explosion (seealso Chapter 7, [3]).

2.13 Low flame spread

2.13.1 Low flame spread means that the surface thusdescribed will adequately restrict the spread of flame, thisbeing determined in accordance with the Fire Test Proce-dures Code.

2.14 Machinery spaces

2.14.1 Machinery spaces are all machinery spaces of cate-gory A and other spaces containing propulsion machinery,boilers and other fired processes, fuel oil units, steam andinternal combustion engines, generators and major electri-cal machinery, oil filling stations, refrigerating, stabilizing,ventilation and air conditioning machinery, and similarspaces, and trunks to such spaces.

2.15 Machinery spaces of category A

2.15.1 Machinery spaces of category A are all spaceswhich contain internal combustion-type machinery usedeither:

a) for main propulsion; or

b) for other purposes where such machinery has in theaggregate a total power output of not less than 375 kW;

or which contain any oil fired boiler or fuel oil unit; andtrunks to such spaces.

2.15.2 Spaces containing any oil fired equipment otherthan boilers, such as inert gas generators, incinerators, etc.,are to be considered as machinery spaces of category A.

2.16 Non-combustible material

2.16.1 Non-combustible material is a material which nei-ther burns nor gives off flammable vapours in sufficientquantity for self-ignition when heated to approximately750° C, this being determined in accordance with the FireTest Procedures Code (see [2.8]).

2.16.2 In general, products made only of glass, concrete,ceramic products, natural stone, masonry units, commonmetals and metal alloys are considered as being non-com-bustible and may be installed without testing and approval.

2.17 Semi-enclosed locations

2.17.1 Semi-enclosed locations are locations where natu-ral conditions of ventilation are notably different from thoseon open decks due to the presence of structures such asroofs, windbreaks and bulkheads and which are soarranged that dispersion of gas may not occur.

2.18 Service spaces

2.18.1 Service spaces are those spaces used for galleys,pantries containing cooking appliances, lockers and store-rooms, workshops other than those forming part of themachinery spaces, and similar spaces and trunks to suchspaces.

2.18.2

a) A pantry containing no cooking appliances may con-tain:

1) toasters, induction heaters, microwave ovens andsimilar appliances each of them with a maximumpower of 1 kW;

2) coffee automats without any restriction on theirpower; and

3) other non-cooking appliances such as dish washers,water boilers, ice-cube machines, fridges, etc,regardless of their power;


Chapter 9

b) Pantries containing cooking appliances may containappliances listed in a) and:

1) toasters, induction heaters, microwave ovens andsimilar appliances each of them with a maximumpower of 5 kW;

2) electrically heated cooking plates and hot plates forkeeping food warm each of them with a maximumpower of 2 kW and a surface temperature not above150°C;

A dining room containing such appliances is not to beregarded as a pantry.

c) Spaces containing any electrically heated cooking plateor hot plate for keeping food warm with a power ofmore than 2kW or toasters, induction heaters, micro-wave ovens and similar appliances each of them withpower greater than 5 kW are to be regarded, for the pur-pose of this Chapter, as galleys.

2.19 Standard fire test

2.19.1 A standard fire test is a test in which the specimensof the relevant bulkheads or decks are exposed in a test fur-nace to temperatures corresponding approximately to thestandard time-temperature curve in accordance with theFire Test Procedures Code (see [2.8]).

2.20 Steel or other equivalent material

2.20.1 Where the words "steel or other equivalent mate-rial" occur, "equivalent material" means any non-combusti-ble material which, by itself or due to insulation provided,had structural and integrity properties equivalent to steel atthe end of the applicable exposure to the standard fire test(e.g. aluminium alloy with appropriate insulation).

2.21 Tank area

2.21.1 The tank area is the portion of the unit where thecargo is stored or where loading and unloading operationsare carried out. The tank area also includes the area whereproduction equipment is located.

2.22 Working spaces

2.22.1 Working spaces are those open or enclosed spacescontaining equipment and processes, associated with unitoperations which are not included in [2.14] and [2.15].

3 Structural fire protection

3.1 General

3.1.1 These requirements have been formulated princi-pally for units with their hull superstructure, structural bulk-heads, decks and deckhouses constructed of steel.

3.1.2 Units constructed of other materials may beaccepted, on condition that, in the opinion of RINA, theyprovide an equivalent standard of safety.

3.2 Fire integrity of bulkheads and decks

3.2.1 In addition to complying with the specific provisionsfor fire integrity of bulkheads and decks in [3.2] and [3.3],the minimum fire integrity of bulkheads and decks is to beas prescribed in Tables 3 and 4.

a) Exterior boundaries of superstructures and deckhousesenclosing accommodation spaces, services spaces, con-trol stations and machinery spaces including any over-hanging decks which support such spaces, are to beconstructed to "A-60" standard for the whole of the por-tion which faces and is within 30 m of the centre of therotary table. For units that have a movable substructure the 30 m is tobe measured with the substructure at its closest drillingposition to the accommodation. The Administrationmay accept equivalent arrangements.

b) For FSO and FSRO, in lieu of item a), the followingrequirements apply. Exterior boundaries of superstructures and deckhousesenclosing accommodation spaces, services spaces, con-trol stations and machinery spaces including any over-hanging decks which support such spaces, are to beconstructed to "A-60" standard for the whole of the por-tion which faces the tank area, and on the outward sidesfor a distance of 3 m from the end boundary facing thetank cargo area. In the case of the sides of those super-structures and deckhouses, such insulation is to be car-ried up to the underside of the deck of the navigationbridge, where fitted.

3.2.2 Spaces located in the tank area which are used forcargo operation purposes (e.g. cargo hose lockers) may beexempted from the requirements set out in [3.2.1].

3.2.3 Boundaries separating cargo pump rooms andmachinery spaces of category A are to meet at least the A-0class standard.

3.2.4 The following requirements govern application ofthe Tables:

a) Tables 3 and 4 apply, respectively, to bulkheads anddecks separating adjacent spaces.

b) For determining the appropriate fire integrity standardsto be applied to divisions between adjacent spaces,such spaces are classified according to their fire risk asshown in Categories (1) to (11) below. The title of eachcategory is intended to be typical rather than restrictive.The number in parentheses preceding each categoryrefers to the applicable column or row in the tables:• "Control stations" are spaces as defined in [2.7].• "Corridors" means corridors and lobbies.• "Accommodation spaces" are spaces as defined in

[2.2], excluding stairways, corridors, lavatories andpantries containing no cooking appliances.

• "Stairways" are interior stairways, lifts and escalators(other than those wholly contained within machin-ery spaces) and enclosures thereto. In this connec-tion, a stairway which is enclosed only at one levelis to be regarded as part of the space from which it isnot separated by a fire door.


Chapter 9

• "Service spaces (low risk)" are lockers, storeroomsand working spaces in which flammable materialsare not stored, drying rooms and laundries.

• "Machinery spaces of Category A" are spaces asdefined in [2.15].

• "Other machinery spaces" are spaces as defined in[2.14], other than machinery spaces of Category A.

• "Hazardous areas" are areas as defined in [2.12].

• "Service spaces (high risk)" are lockers, storeroomsand working spaces in which flammable materialsare stored, galleys, pantries containing cookingappliances, paint rooms and workshops other thanthose forming part of the machinery space (see[2.18.2]).

• "Open decks" are open deck spaces, excluding haz-ardous areas.

• "Sanitary and similar spaces" are communal sanitaryfacilities such as showers, baths, lavatories, etc., andisolated pantries containing no cooking appliances.Sanitary facilities which serve a space and have

access only from that space are to be considered aportion of the space in which they are located (see[2.18.2]).

c) Continuous "B" class ceilings or linings in associationwith the relevant decks or bulkheads may be acceptedas contributing wholly or in part to the required insula-tion and integrity of a division provided they are testedin accordance with the Fire Test Procedures Code.

d) In approving structural fire protection details, RINA willpay due regard to the risk of heat transmission at inter-sections and terminal points of required thermal barri-ers.

The insulation of a deck or bulkhead is to be carriedpast the penetration, intersection or terminal point for adistance of at least 450 mm in the case of steel and alu-minium structures. If a space is divided by a deck or abulkhead of "A" class standard having insulation of dif-ferent values, the insulation with the higher value is tocontinue on the deck or bulkhead with the insulation ofthe lesser value for a distance of at least 450 mm.

Table 3 : Fire integrity of bulkheads separating adjacent spaces

SPACES (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)

Control stations (1) A-0 [d] A-0 A-60 A-0 A-15 A-60 A-15 A-60 A-60 * A-0

Corridors (2) C B-0 B-0A-0 [b]

B-0 A-60 A-0 A-0 A-0 * B-0

Accommodation spaces (3) C B-0 A-0 [b]

B-0 A-60 A-0 A-0 A-0 * C

Stairways (4) B-0 A-0 [b]

B-0 A-0 [b]

A-60 A-0 A-0 A-0 * B-0 A-0 [b]

Service spaces (low risk) (5) C A-60 A-0 A-0 A-0 * B-0

Machinery spaces of category A (6) * [a] A-0 [a] A-60 A-60 * A-0

Other machinery spaces (7) A-0 [a] [c]

A-0 A-0 * A-0

Cargo spaces (8) - A-0 - A-0

Service spaces (high risk) (9) A-0 [c]

* A-0

Open decks (10) - *

Special category spaces (11) C

Note 1: (to be applied to Tab 3 and Tab 4, as appropriate)[a] Where the space contains an emergency power source or components of an emergency power source adjoining a space contain-ing a ship's service generator or the components of a ship's service generator, the boundary bulkhead or deck between those spaces is to be an "A-60" class division.[b] For clarification as to which note applies, see [3.2.1] and [3.2.4].[c] Where spaces are of the same numerical category and superscript [c] appears, a bulkhead or deck of the rating shown in the tables is only required when the adjacent spaces are used for different purposes, e.g. in Category (9). A galley next to a galley does not require a bulkhead but a galley next to a paint room requires an "A-0" bulkhead.[d] Bulkheads separating the navigating bridge, chartroom and radio room from each other may be "B-0" rating.[*] Where an asterisk appears in the tables, the division is to be of steel or equivalent material, but need not be of "A" class standard. However, where a deck is penetrated for the passage of electrical cables, pipes and vent ducts, such penetrations are to be made tight to prevent the passage of flame and smoke.


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Table 4 : Fire integrity of decks separating adjacent spaces

3.2.5 Special requirements for units with diving systems

Enclosed spaces for diving systems are to be separated fromany other enclosed space by means of "A-60" divisions.Such spaces are not to be located adjacent to any hazard-ous areas.

3.2.6 Windows and sidescuttles and skylights

a) Windows and sidescuttles, with the exception of navi-gating bridge windows, are to be of the non-openingtype.

Navigating bridge windows may be of the opening typeprovided the design permits rapid closure. RINA maypermit windows and sidescuttles outside hazardousareas to be of the opening type.

b) Windows and sidescuttles in boundaries required tomeet an "A-60" standard which face the drill floor areaor tank area are to be:

1) constructed to an "A-60" standard; or

2) constructed to an "A-0" standard and protected by awater curtain capable of being operated from inte-rior locations; or

3) fitted with shutters of steel or equivalent materialcapable of being rapidly closed from interior loca-tions.

c) Skylights or windows are not permitted in machineryspace of category A boundaries.

3.2.7 Fire resistance of doors

The fire resistance of doors is, as far as practicable, to beequivalent to that of the division in which they are fitted.

External doors in superstructures and deckhouses are to beconstructed to at least "A-0" class standard and be self-clos-ing, where practicable.

3.3 Protection of accommodation spaces, service spaces and control stations

3.3.1 Construction of B class divisions

All bulkheads required to be "B" class divisions are toextend from deck to deck and to the deckhouse side orother boundaries, unless continuous "B" class ceilings orlinings are fitted on both sides of the bulkhead, in whichcase the bulkhead may terminate at the continuous ceilingor lining. In corridor bulkheads, ventilation openings maybe permitted only in and under the doors of cabins, publicspaces, offices and sanitary spaces. The openings are to beprovided only in the lower half of the door. Where such anopening is in or under a door, the total net area of any suchopening or openings is not to exceed 0,05 m2. When suchan opening is cut in a door it is to be fitted with a grillemade of non-combustible material. Such openings are notto be provided in a door in a division forming a stairwayenclosure.

3.3.2 Construction and arrangement of stairways

Stairs are to be constructed of steel or equivalent material.

3.3.3 Stairways which penetrate only a single deck are tobe protected at least at one level by "A" or "B" class divi-sions and self-closing doors so as to limit the rapid spread offire from one deck to another. Personnel lift trunks are to beprotected by "A" class divisions. Stairways and lift trunkswhich penetrate more than a single deck are to be sur-rounded by "A" class divisions and protected by self-closingdoors at all levels. Self-closing doors are not to be fittedwith hold-back hooks. However, hold-back arrangementsincorporating remote release fittings of the fail-safe typemay be used.

SPACE belowSPACE above

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)

Control stations (1) A-0 A-0 A-0 A-0 A-0 A-60 A-0 A-0 A-0 * A-30

Corridors (2) A-0 * * A-0 * A-60 A-0 A-0 A-0 * *

Accommodation spaces (3) A-60 A-0 * A-0 * A-60 A-0 A-0 A-0 * *

Stairways (4) A-0 A-0 A-0 * A-0 A-60 A-0 A-0 A-0 * A-0

Service spaces (low risk) (5) A-15 A-0 A-0 A-0 * A-60 A-0 A-0 A-0 * A-0

Machinery spaces of category A (6)

A-60 A-60 A-60 A-60 A-60 * [a] A-60 A-60 A-60 * A-0

Other machinery spaces (7) A-15 A-0 A-0 A-0 A-0 A-0 [a] * [a] A-0 A-0 * A-0

Hazardous areas (8) A-60 A-0 A-0 A-0 A-0 A-60 A-0 - A-0 - A-0

Service spaces (high risk) (9) A-60 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 [c] * A-0

Open decks (10) * * * * * * * - * - *

Special category spaces (11) A-0 A-0 * A-0 * A-0 A-0 A-0 A-0 * *

Note 1: The notes to Tab 3 apply to this table, as appropriate.


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3.3.4 Draught stops

Air spaces enclosed behind ceilings, panelling or linings areto be divided by close fitting draught stops spaced not morethan 14 m apart.

In the vertical direction, such enclosed air spaces, includingthose behind linings of stairways, trunks, etc., are to beclosed at each deck.

3.3.5 Materials

a) Except for insulation in refrigerated compartments, insu-lation material, pipe and vent duct lagging, ceilings, lin-ings and bulkheads are to be of non-combustiblematerial. Insulation of pipe fittings for cold service sys-tems and vapour barriers and adhesives used in con-junction with insulation need not be non-combustiblebut they are to be kept to a minimum and their exposedsurfaces are to have low flame spread characteristics. Inspaces where penetration of oil products is possible, thesurfaces of the insulation are to be impervious to oil oroil vapours.

b) The framing, including grounds and the joint pieces ofbulkheads, linings, ceilings and draught stops are to beof non-combustible material.

c) All exposed surfaces in corridors and stairway enclo-sures and surfaces in concealed or inaccessible spacesin accommodation and service spaces and control sta-tions are to have low flame spread characteristics.Exposed surfaces of ceilings in accommodation andservice spaces and control stations are to have lowflame spread characteristics.

d) Bulkheads, linings and ceilings may have combustibleveneers provided that the thickness of such veneers doesnot exceed 2 mm within any space other than corridors,stairway enclosures and control stations, where thethickness is not to exceed 1,5 mm. Alternatively,veneers which have a calorific value not exceeding 45mJ/m2 of the area for the thickness used may beaccepted by RINA, irrespective of the thickness of thoseveneers.

e) Primary deck coverings, if applied, are to be ofapproved material which will not readily ignite or giverise to toxic or explosive hazards at elevated tempera-tures, this being determined in accordance with the FireTest Procedures Code.

f) Paints, varnishes and other finishes used on exposedinterior surfaces are not to offer an undue fire hazard inthe judgement of RINA and are not to be capable of pro-ducing excessive quantities of smoke, this being deter-mined in accordance with the Fire Test ProceduresCode.

3.4 Ventilation systems - General require-ments

3.4.1 Ventilation ducts are to be of non-combustible mate-rial. Short ducts, however, not generally exceeding 2 m inlength and with a cross-sectional area not exceeding

0,02 m2 need not be non-combustible, subject to the fol-lowing conditions:

a) the ducts are made of a material which has low flamespread characteristics;

b) they are only used at the end of the ventilation device;

c) they are situated not less than 600 mm, measured alongthe duct, from where it penetrates any "A" or "B" classdivision including continuous "B" class ceilings.

Flexible bellows of combustible material may be used forconnecting fans to the ducting in the air conditioning room.

3.4.2 Where a thin plated duct with a free cross-sectionalarea equal to, or less than, 0,02 m2 passes through "A" classbulkheads or decks, the opening is to be lined with a steelsheet sleeve having a thickness of at least 3 mm and alength of at least 200 mm, divided preferably into 100 mmon each side of the bulkhead or, in the case of the deck,wholly laid on the lower side of the decks pierced.

3.4.3 Where ventilation ducts with a cross-sectional areaexceeding 0,02 m2 pass through class "A" bulkheads ordecks, the opening is to be lined with a steel sheet sleeveunless the ducts passing through the bulkheads or decks areof steel in the vicinity of penetrations through the deck orbulkhead; the ducts and sleeves at such places are to com-ply with the following:

a) The ducts or sleeves are to have a thickness of at least 3mm and a length of at least 900 mm. When passingthrough bulkheads, this length is to be divided prefera-bly into 450 mm on each side of the bulkhead. Theseducts, or sleeves lining such ducts, are to be providedwith fire insulation. The insulation is to have at least thesame fire integrity as the bulkhead or deck throughwhich the duct passes. Equivalent penetration protec-tion may be provided to the satisfaction of RINA.

b) In addition to meeting the requirements of item a), ductswith a cross-sectional area exceeding 0,075 m2, exceptthose serving hazardous areas, are to be fitted with firedampers. The fire dampers are to operate automaticallybut are also to be capable of being closed manuallyfrom both sides of the bulkhead or deck. Fire dampersare not required, however, where ducts pass throughspaces surrounded by "A" class divisions, without serv-ing those spaces, provided such ducts have the same fireintegrity as the divisions which they pierce. RINA may,in special cases, permit operation from one side of adivision only.

3.4.4 Ventilation systems for machinery spaces of categoryA, galleys and hazardous areas are to be separated fromeach other and from ventilation systems serving otherspaces, except that galley ventilation systems on units ofless than 4,000 gross tonnage need not be completely sepa-rated but may be served by separate ducts from a ventilationunit serving other spaces. In any case, an automatic firedamper is to be fitted in the galley ventilation duct near theventilation machinery.

3.4.5 Ducts provided for the ventilation of machineryspaces of Category A, galleys and hazardous areas are notto pass through accommodation spaces, service spaces or


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control stations. However, except for ducts serving hazard-ous areas passing through accommodation spaces, controlstations and galleys, RINA may permit a relaxation from thisrequirement, on condition that the ducts are:

a) constructed of steel having a thickness of at least 3 mmfor ducts of 300 mm in width or less and of at least 5mm for ducts of 760 mm in width and over; in the caseof ducts the width or diameter of which is between 300mm and 760 mm, the thickness is to be obtained byinterpolation;

b) fitted with automatic fire dampers close to the bounda-ries penetrated; and

c) insulated to "A-60" standard from the machinery spacesor galleys to a point at least 5 m beyond each firedamper;

or

d) constructed of steel in accordance with a); and

e) insulated to "A-60" standard throughout the accommo-dation spaces, service spaces or control stations.

3.4.6 Ducts provided for the ventilation of accommoda-tion spaces, service spaces or control stations are not topass through machinery spaces of Category A, galleys orhazardous areas. However, RINA may permit a relaxationfrom this requirement, except for ducts passing throughhazardous areas, on condition that:

a) where they pass through a machinery space of CategoryA or a galley, the ducts are constructed of steel inaccordance with [3.4.5] a);

b) automatic fire dampers are fitted close to the boundariespenetrated; and

c) the integrity of the machinery space or galley bounda-ries is maintained at the penetrations; or

d) where they pass through a machinery space of CategoryA or a galley, the ducts are constructed of steel inaccordance with [3.4.5] (a); and

e) they are insulated to "A-60" standard within the machin-ery space or galley.

3.4.7 Where they pass through accommodation spaces orspaces containing combustible materials, the exhaust ductsfrom galley ranges are to be of equivalent fire integrity to"A" class divisions.

Each such exhaust duct is to be fitted with:

a) a grease trap readily removable for cleaning;

b) a fire damper located in the lower end of the duct;

c) arrangements, operable from within the galley, for shut-ting off the exhaust fans; and

d) fixed means for extinguishing a fire within the duct.

3.4.8 Ventilation ducts with a cross-sectional area exceed-ing 0,02 m2 passing through "B" class bulkheads are to belined with steel sheet sleeves of 900 mm in length dividedpreferably into 450 mm on each side of the bulkhead,unless the duct is of steel for this length.

3.4.9 Fire dampers fitted in accordance with [3.4] are tobe:

a) easily accessible. Where they are placed behind ceil-ings or linings, these are to be provided with an inspec-tion door on which a plate reporting the identificationnumber of the fire damper is provided. The fire damperidentification number is also to be placed on anyremote controls required; and

b) provided with an indicator which shows whether thedamper is open or closed.

3.4.10 The following arrangements are to be tested inaccordance with the Fire Test Procedures Code:

a) fire dampers, including relevant means of operation,and

b) duct penetrations through A class divisions. However,the test is not required where steel sleeves are directlyjoined to ventilation ducts by means of riveted orscrewed flanges or by welding.

3.4.11 The main inlets and outlets of all ventilation sys-tems are to be capable of being closed from outside thespaces being ventilated. Relevant dampers are to be capa-ble of being remotely closed (see [5.10]).

3.4.12 Power ventilation of accommodation spaces, serv-ice spaces, control stations, machinery spaces and hazard-ous areas is to be capable of being stopped from an easilyaccessible position outside the space being served. Theaccessibility of this position in the event of a fire in thespaces served is to be specially considered. The means pro-vided for stopping the power ventilation serving machineryspaces or hazardous areas are to be entirely separate fromthe means provided for stopping ventilation of other spaces.

3.4.13 The ventilation of accommodation spaces and con-trol stations is to be arranged in such a way as to prevent theingress of flammable, toxic or noxious gases, or smoke fromsurrounding areas.

3.5 Ventilation systems in hazardous spaces

3.5.1 GeneralIn addition to the requirements set out in [3.4], ventilationsystems of hazardous spaces are to meet the following:

a) Ventilation systems for hazardous spaces are to be inde-pendent from ventilation systems for non-hazardousspaces.

b) Hazardous enclosed spaces are to be mechanically ven-tilated with underpressure in relation to adjacent lesshazardous locations. Ventilation failure is to initiate analarm at a manned location.

c) Fans are to be of non-sparking type and relevant electricmotors are to be located outside the ventilation ducts.

d) Ventilation inlet ducts passing through a more hazard-ous area than the ventilated space are to be operated atoverpressure in relation to the hazardous area.

e) Ventilation inlets are to be located outside hazardousareas.


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f) The outlet air from hazardous spaces is to be routedthrough separate ducts to an outdoor area which, in theabsence of the exhaust considered, is no more hazard-ous than the ventilated space.

g) The outlet ducts and the area within 3 m of the dis-charge point are to be classified as the same zone as theventilated space.

h) Loss of mechanical ventilation in spaces whose classifi-cation is dependent on ventilation is to result in:

• immediate remedial action to restore ventilation

• isolation of ignition sources where ventilation cannot be restored within a short time, or if gas isdetected during ventilation failure.

i) Ventilation ducts are to be fitted with metallic dampersprovided with "open" and "closed" indication. Thesedampers are to be arranged in the open, in a readilyaccessible position.

3.5.2 Ventilation of crude oil pump rooms on FPSO, FPO and FSO

The ventilation is to have sufficient capacity to minimize thepossibility of accumulation of flammable vapours. Thenumber of changes of air is to be at least 20 per hour, basedupon the gross volume of the space. The air ducts are to bearranged so that all of the space is effectively ventilated.

The ventilation system capable of providing the required airchanges per hour is to comply with the following and[1.8.9], as applicable:

a) in order to avoid air stagnation zones, air exhaust portsinside the pump room are to be adequately distributedand the various landings are to consist of open gratingsor perforated flats

b) inlet ducts are generally to end at the top of the roomand outlet ducts are to extend below the floor plates,with suction ports at the level of the upper edge of ordi-nary floors or bottom longitudinals

c) in addition, suction ducts are to be provided with anemergency intake at approximately 2,20 m above thepump room lower grating, with a shutter capable ofbeing opened or closed both at lower grating level andfrom the weather deck level, so that suction normallyoccurs through the lower suction ports and, in the eventof the pump room flooding, through those at the topbranched from the emergency intake

d) an arrangement involving a specific ratio of areas ofupper emergency and lower main ventilator openings,which can be shown to result in at least the required 20air changes per hour through the lower inlets, can beadopted without the use of shutters. When the loweraccess inlets are closed then at least 15 air changes perhour are to be obtained through the upper inlets.

Lighting in cargo pump rooms, except emergency lighting,is to be interlocked with ventilation such that the ventilationis in operation when the lighting is switched on. Failure ofthe ventilation system is not to cause the lighting to go out.

3.5.3 Ventilation of other enclosed or semi-enclosed spaces within tank area on FSPO, FPO and FSO

The ventilation system of these spaces is to have sufficientcapacity to minimize the possibility of accumulation offlammable vapours. The number of changes of air is to be atleast 20 per hour, based upon the gross volume of thespace. The air ducts are to be arranged so that all of thespace is effectively ventilated. Different values of airchanges may be required or accepted by RINA based on thepurpose of the space under consideration.

3.5.4 Spaces required to be entered during normal cargo handling operations on FSRU

a) Electric motor rooms, cargo compressor and pump-rooms, other enclosed spaces which contain cargo han-dling equipment and similar spaces in which cargo han-dling operations are performed are to be fitted withventilation systems capable of being controlled fromoutside such spaces. Provision is to be made to ventilatesuch spaces prior to entering the compartment andoperating the equipment and a warning notice requiringthe use of such ventilation is to be placed outside thecompartment.

b) The ventilation system is have a capacity of not less than30 changes of air per hour based upon the gross volumeof the space. As an exception, gas-safe cargo controlrooms may have eight changes of air per hour.

c) Ventilation systems are to permit extraction from eitherthe upper or the lower parts of the spaces, or from boththe upper and lower parts, depending on the density ofthe vapours of the products to be expected on the units.

d) Ventilation exhaust ducts from gas-dangerous spacesare to discharge upwards in locations at least 10 m inthe horizontal direction from ventilation intakes andopenings to accommodation spaces, service spaces andcontrol stations and other gas-safe spaces.

e) Electric motors driving fans are to be placed outside theventilation ducts if flammable products are expected onthe units.

3.5.5 Spaces not normally entered during normal operations on FSRU

Hold spaces, interbarrier spaces, void spaces, cofferdams,spaces containing cargo piping and other spaces wherecargo vapours may accumulate are to be capable of beingventilated to ensure a safe environment when entry into thespaces is necessary. Where a permanent ventilation systemis not provided for such spaces, approved means of portablemechanical ventilation is to be provided. Where necessaryowing to the arrangement of spaces such as hold spacesand interbarrier spaces, essential ducting for such ventila-tion is to be permanently installed. Fans or blowers are tobe clear of personnel access openings.

Where a fixed ventilation system is installed, the number ofchanges of air is to be at least 20 per hour, based upon thegross volume of the space.

For portable ventilation systems, the number of the above-mentioned changes is to be not less than 20.


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3.5.6 Enclosed hangar facilities or enclosed spaces containing helicopter refuelling installations

These spaces are to be provided with a fixed ventilation sys-tem capable of guaranteeing not less than 6 air changes perhour, based upon the gross volume of the space.

3.5.7 Non-sparking fansFans and blowers are not to produce a source of vapourignition in either the ventilated space or the ventilation sys-tem associated with the space. They are to be certified asnon-sparking type in compliance with the followingrequirements. Item b) of this Article applies also to ducts inway of fans and blowers.

a) Design criteria

1) The air gap between the impeller and the casing is tobe not less than 1/10 of the shaft diameter in way ofthe impeller bearing and in any case not less than 2mm, but need not exceed 13 mm.

2) Protective screens with square mesh of not morethan 13 mm are to be fitted to the inlet and outlet ofventilation ducts to prevent objects entering the fanhousing.

3) The shafting penetration of motors driving fansthrough bulkheads and decks of dangerous spacesor through ventilation ducts is to be fitted with a gas-tight sealing device, of the oil-seal type or equiva-lent, deemed suitable by RINA.

b) Materials

1) Except as indicated in the fourth bullet of item 3)below, the impeller and the housing in way of theimpeller are to be made of spark-proof materialswhich are recognised as such by means of an appro-priate test to the satisfaction of RINA.

2) Electrostatic charges, both in the rotating body andthe casing, are to be prevented by the use of anti-static materials. Furthermore, the installation onboard of ventilation units is to be such as to ensuretheir safe bonding to the hull.

3) Tests may not be required for fans having the follow-ing material combinations:

• impellers and/or housings of non-metallic mate-rial, due regard being paid to the elimination ofstatic electricity

• impellers and housings of non-ferrous materials

• impellers of aluminium alloys or magnesiumalloys and a ferrous (including austenitic stain-less steel) housing on which a ring of suitablethickness of non-ferrous material is fitted in wayof the impeller

• any combination of ferrous (including austeniticstainless steel) impellers and housings with notless than 13 mm design tip clearance.

4) The following impeller and housing combinationsare considered as sparking and therefore are not per-mitted:

• impellers of an aluminium alloy or a magnesiumalloy and a ferrous housing, regardless of tipclearance

• housings made of an aluminium alloy or a mag-nesium alloy and a ferrous impeller, regardless oftip clearance

• any combination of ferrous impeller and housingwith less than 13 mm design tip clearance.

3.6 Protection in overpressure 3.6.1 a) Any closed non-hazardous space containing ignition

sources and located in zone 1 and zone 2 areas is to bemaintained at overpressure. For the definition of zone 1and zone 2 see Ch 7, [2].Ventilation intakes are to be located in non-hazardousareas. For access doors see Ch 7, [2.1.3].

b) Alarms and isolation of ignition sources are to be initi-ated on detection of an explosive atmosphere adjacentto the ventilation air inlets, in accordance with the shut-down philosophy for the unit or installation.

c) The ventilation system is to be suitable to maintain atleast 50 Pa overpressure with respect to the externalhazardous areas when all penetrations are closed and tomaintain an outward air flow through all openings (sin-gle or multiple penetrations) of the enclosed space.

d) Failure of overpressure ventilation is to be alarmed at amanned location. Alarm delay to avoid spurious inter-vention is acceptable.

e) An enclosed space is to be purged and verified as gas-free before uncertified electrical equipment or otherignition sources are energised after loss of overpressure.

4 Means of escape

4.1

4.1.1 Within the accommodation spaces, service spacesand control stations the following requirements are to beapplied:

a) In every general area which is likely to be regularlymanned or in which personnel are accommodated, atleast two separate escape routes are to be provided, sit-uated as far apart as practicable, to allow ready meansof escape to the open decks and embarkation stations.Exceptionally, RINA may permit only one means ofescape, due regard being paid to the nature and loca-tion of spaces and to the number of persons who mightnormally be accommodated or employed there.

b) Stairways should normally be used for means of verticalescape; however, a vertical ladder may be used for oneof the means of escape when the installation of a stair-way is shown to be impracticable.

c) Every escape route is to be readily accessible and unob-structed and all exit doors along the route are to bereadily operable. Dead-end corridors exceeding 7 m inlength are not permitted.

4.1.2 Two means of escape are to be provided from everymachinery space of Category A by one of the following:

a) two sets of steel ladders, as widely separated as possi-ble, leading to doors in the upper part of the space simi-


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larly separated and from which access is provided to theopen deck. In general, one of these ladders should pro-vide continuous fire shelter from the lower part of thespace to a safe position outside the space. However,RINA may not require the shelter if, due to the specialarrangement or dimensions of the machinery space, asafe escape route from the lower part of this space isprovided. This shelter is to be of steel, insulated wherenecessary to the satisfaction of RINA, and provided witha self-closing steel door at the lower end; or

b) one steel ladder leading to a door in the upper part ofthe space from which access is provided to the opendeck and additionally, in the lower part of the space andin a position well separated from the ladder referred to,a steel door capable of being operated from each sideand which provides access to a safe escape route fromthe lower part of the space to the open deck. Exception-ally, RINA may require only one means of escape, dueregard being paid to the nature and location of spacesand to the number of persons who might normally beemployed there.

4.1.3 From machinery spaces other than those of CategoryA, escape routes are to be provided to the satisfaction ofRINA having regard to the nature and location of the spaceand whether persons are normally employed there.

4.1.4 Lifts are not to be considered as forming one of therequired means of escape.

4.1.5 In general, stairs, corridors and doorways formingpart of an escape path are to have a width of not less than700 mm.

5 Active fire protection

5.1 Fire pumps, fire mains, hydrants and hoses

5.1.1 Fire pumps

a) At least two independently driven power pumps are tobe provided, each arranged to draw directly from thesea and discharge into a fixed fire main. However, inunits with high suction lifts, booster pumps and storagetanks may be installed, provided such arrangements willsatisfy all the requirements of this item [5.1.1], includ-ing the following:

1) The intermediate tanks are to be of such size and sooperated that the lowest water level permitted willensure that the supply of water is adequate for twohoses at a minimum of 0,35 N/mm2 pressure at theuppermost hydrant for at least 15 minutes (minimumtank capacity of 10 m3). This is to allow for sufficienttime to bring a replenishment pump into service.Valves and pumps serving the intermediate tankwhich are not readily accessible are to be providedwith means for remote operation.

2) The following features are to be incorporated in asystem using an intermediate tank:

• a low water level alarm;

• two reliable and adequate pumps to replenishwater in the intermediate tank. These pumps areto be arranged in accordance with the first twosentences of this item a) and item e). At least oneof the replenishment pumps is to be arranged forautomatic operation.

b) At least one of the required pumps is to be dedicated tofire-fighting duties and be available for such duties at alltimes. Fire pumps are, in general, to be dedicated tofire-fighting service. The use of fire pumps for other serv-ice will be considered by RINA on a case-by-case basis,taking into consideration the immediate availability ofwater to the fire main mentioned in f).

c) The arrangements of the pumps, sea suctions andsources of power are to be such as to ensure that a firein any one space would not put both the requiredpumps out of action.

d) The capacity of the required pumps is to be appropriateto the fire-fighting services supplied from the fire main.Where more pumps than required are installed, theircapacity is to be to the satisfaction of RINA; in general,each fire pump is to have a capacity of at least 50 m3/h.Higher capacity may be required by RINA dependingon unit dimensions.

e) Each pump is to be capable of delivering at least one jetsimultaneously from each of any two fire hydrants,hoses and 19 mm nozzles while maintaining a mini-mum pressure of 0,35 N/mm2 at any hydrant. In addi-tion, where a foam system is provided for protection ofthe helideck, the pump is to be capable of maintaining apressure of 0,7 N/mm2 at the foam installation. Shouldthe water consumption for any other fire protection orfire-fighting purpose exceed the rate of the helideckfoam installation, this consumption is to be the deter-mining factor in calculating the required capacity of thefire pumps.

f) Where either of the required pumps is located in aspace not normally manned and, in the opinion ofRINA, is relatively far removed from working areas, suit-able provision is to be made for remote start-up of thatpump and remote operation of associated suction anddischarge valves. However, the decrease of pressure inthe fire main is to cause the automatic activation of thefire pumps.

g) Except as provided for in b), sanitary, ballast, bilge orgeneral service pumps may be accepted as fire pumps,provided that they are not normally used for pumpingoil.

h) The pumps are to be capable of 18 h automatic opera-tion. Different operation periods may be considered inrelation to the availability of external assistance.

i) Every centrifugal pump which is connected to the firemain is to be fitted with a non-return valve.

j) The sea section of fire pumps is to be provided withstrainers and other suitable means for avoiding marinegrowth that may impair fire water system performance.

k) Relief valves are to be provided in conjunction with allpumps connected to the fire main if the pumps arecapable of developing a pressure exceeding the design


Chapter 9

pressure of the fire main, hydrants and hoses. Suchvalves are to be so placed and adjusted as to preventexcessive pressure in the fire main system.

l) The status of the pumps is to be indicated at the centralcontrol station. Alarms are to be provided to indicatethe intervention of any pump.

5.1.2 Fire main and connected piping

a) A fixed fire main is to be provided and be so equippedand arranged as to meet the requirements of this item[5.1.2] and item [5.1.3].

b) The diameter of the fire main and water service pipes isto be sufficient for the effective distribution of the maxi-mum required discharge from the required fire pumpsoperating simultaneously.

c) With the required fire pumps operating simultaneously,the pressure maintained in the fire mains is to be to thesatisfaction of RINA and be adequate for the safe andefficient operation of all equipment supplied therefrom.

d) The fire main should, where practicable, be routed clearof hazardous areas and be arranged in such a manner asto make maximum use of any thermal shielding or phys-ical protection afforded by the structure of the unit.

In this respect, the fire main is to be designed in such away that any part of the drilling floor, tank area, storagearea and areas of loading and discharge manifolds maybe reached by water supplied by separated branchpipes.

e) The fire main is to be provided with isolating valveslocated so as to permit optimum utilization in the eventof physical damage to any part of the main. Valves fordividing different branch pipes are to be located in asafe position near the accommodation areas. Valves arealso to be placed in a position readily accessible foroperation.

f) The fire main is not to have connections other thanthose necessary for fire-fighting purposes.

g) All practical precautions consistent with having waterreadily available are to be taken to protect the fire mainagainst freezing.

h) Materials readily rendered ineffective by heat should notbe used for fire mains and hydrants unless adequatelyprotected. The pipes and hydrants are to be so placedthat the fire hoses may be easily coupled to them.

i) A cock or valve is to be fitted to serve each fire hose sothat any fire hose may be removed while the fire pumpsare operating.

5.1.3 Hydrants

a) The number and position of the hydrants are to be suchthat at least two jets of water, not emanating from thesame hydrant, one of which is to be from a single lengthof fire hose, may reach any part of the unit normallyaccessible to those on board while the unit is being nav-igated or is engaged in normal operations. A hose is tobe provided for every hydrant.

Hydrants are to be so disposed that any part of the tankarea, drilling area, storage area and areas of loading and

discharge manifolds may be reached by four streams ofwater (two couples fed by different branch pipes), two ofwhich (one from each branch pipe) emanating from asingle length of hose.

b) Fire hoses are to be of material approved by RINA andbe sufficient in length to project a jet of water to any ofthe spaces in which they may be required to be used.Their maximum length is to be to the satisfaction ofRINA. Every fire hose is to be provided with a dual pur-pose nozzle (i.e. spray/jet type) and the necessary cou-plings. Fire hoses, together with any necessary fittingsand tools, are to be ready for use at any time and are tobe kept in conspicuous positions near the water servicehydrants or connections.

c) Fire hoses are to have a length of at least 10 m, but notmore than:

• 15 m in machinery spaces;

• 20 m in other spaces and open decks; and

• 25 m for open decks on units with a maximumbreath in excess of 30 m.

d) The length and diameter of hoses, as well as the pres-sure at their nozzles, are to be such that the hoses maybe used in safe manner.

5.1.4 Nozzles

Nozzles are to comply with the following requirements:

a) Standard nozzle sizes are to be 12 mm, 16 mm and 19mm or as near thereto as possible. Larger diameter noz-zles may be permitted at the discretion of RINA.

b) For accommodation and service spaces, a nozzle sizegreater than 12 mm need not be used.

c) For machinery spaces and exterior locations, the nozzlesize is to be such as to obtain the maximum dischargepossible from two jets at the pressure specified in [5.1.1]g) from the smallest pump, provided that a nozzle sizegreater than 19 mm does not need to be used.

5.1.5 International shore connection

a) The surface unit is to be provided with at least one inter-national shore connection.

b) The connection is to be of steel or other equivalentmaterial and is to be designed for 1,0 MPa services. Theflange is to have a flat face on one side and, on the otherside, be permanently attached to a coupling that will fitthe unit's hydrant and hose. The connection is to bekept aboard the ship together with a gasket of any mate-rial suitable for 1,0 MPa services, together with fourbolts of 16 mm diameter and 50 mm in length, four nutsof 16 mm diameter, and eight washers (see also Fig 1and Tab 5).

c) Facilities are to be available enabling such a connectionto be used on any side of the unit.

5.1.6 Emergency control stations

At least two emergency control stations are to be provided.One of the stations is to be located near the drilling consoleand the second station is to be at a suitable manned loca-tion outside the hazardous areas.


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The control stations are to be provided with:

a) manually operated contact maker buttons for actuatingthe general alarm system;

b) an efficient means of communication between these sta-tions and all locations vital to the safety of the unit;

c) emergency disconnecting facilities (see Chapter 8).

Figure 1 : International shore connection

Table 5 : Standard dimensions

5.2 Fire-extinguishing systems in machin-ery spaces and in spaces containing fired processes

5.2.1 a) In spaces where main or auxiliary oil fired boilers and

other fired processes of equivalent thermal rating are sit-uated, or in spaces containing fuel oil units or settlingtanks, the unit is to be provided with the following:

1) One of the following fixed fire-extinguishing sys-tems:• a fixed pressure water-spraying system comply-

ing with Regulation II-2/10 of the 1974 SOLASConvention, as amended and Chapter 7 of theFire Safety Systems Code;

• a fixed fire-extinguishing system complying withRegulation II-2/5 of the 1974 SOLAS Conven-tion, as amended and Chapter 5 of the FireSafety Systems Code;

• a fixed high expansion foam installation comply-ing with Regulation II-2/10 of the 1974 SOLASConvention, as amended and Chapter 6 of theFire Safety Systems Code

• local application system(s) as described in thesubsequent item d).

Where the machinery space and spaces containingfired process systems are not entirely separate, or iffuel oil can drain from the latter spaces into themachinery space, the combined machinery spaceand fired process space are to be considered as onecompartment.

2) At least two portable foam extinguishers or equiva-lent in each firing space in each boiler room and ineach space in which a part of the fuel oil installationis situated. There is to be not less than one approvedfoam-type extinguisher of at least 135 l capacity orequivalent in each boiler room. These extinguishersare to be provided with hoses on reels suitable forreaching any part of the boiler room. In the case ofdomestic boilers of less than 175 kW an approvedfoam-type extinguisher of at least 135 l capacity isnot required.

3) A receptacle containing at least 0,1 m3 of sand, saw-dust impregnated with soda, or other approved drymaterial in such quantity as may be required byRINA. An approved portable extinguisher may beprovided as an alternative.

4) One portable foam applicator set having capacity ofnot less of 20 l with a spare charge.

5) In proximity of the main switchboard and in proxim-ity of any other electric panel or sub-panel of powernot less than 20 kW, a carbon dioxide portableextinguisher.

b) Spaces containing internal combustion machinery usedeither for main propulsion or for other purposes, whensuch machinery has a total power output of not less than

Description Dimension

Outside diameter 178 mm

Inside diameter 64 mm

Bolt circle diameter 132 mm

Slots in flange 4 holes 19 mm in diameter spaced equidistantly on a bolt circle of the above diameter, slotted to the flange periphery

Flange thickness 14,5 mm minimum

Bolts and nuts 4, each of 16 mm diameter, 50 mm in length

��

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750 kW, are to be provided with the following arrange-ments:

1) one of the fixed arrangements required by a)1); and

2) one approved foam-type extinguisher of not lessthan 45 litres capacity or equivalent in every enginespace and one approved portable foam extinguisherfor each 750 kW of engine power output or partthereof. The total number of portable extinguishersso supplied is to be not less than two and need notexceed six;

3) in proximity of the main switchboard and in proxim-ity of any other electric panel or sub-panel of powernot less than 20 kW, a carbon dioxide portableextinguisher.

4) One portable foam applicator set having capacity ofnot less of 20 l with a spare charge.

c) RINA will give special consideration to the fire-extin-guishing arrangements to be provided in spaces not fit-ted with fixed fire-extinguishing installations containingsteam turbines which are separated from boiler roomsby watertight bulkheads.In any case, in proximity of the main switchboard and inproximity of any other electric panel or sub-panel ofpower not less than 20 kW a carbon dioxide portableextinguisher is to be provided.

d) Machinery spaces of category A above 500 m3 in vol-ume are, in addition to the fixed fire-extinguishing sys-tem required in the previous item a), to be protected byan approved type of fixed water-based or equivalentlocal application fire-fighting system, based on theguidelines developed by IMO (see Note 1).

1) In the case of periodically unattended machineryspaces, the fire-fighting system is to have both auto-matic and manual release capabilities. In the case ofcontinuously manned machinery spaces, the fire-fighting system is only required to have a manualrelease capability. The automatic activation of thesystem may be achieved by means of a detectionsystem capable of reliably identifying the protectedarea. The possibility of false alarms is to be takeninto consideration when designing such an arrange-ment.

Note 1: Refer to the Guidelines for the approval of fixed water-based local application fire-fighting systems for use in cate-gory A (MSC/Circ. 913)

2) Fixed local application fire-fighting systems are toprotect areas such as the following without thenecessity of engine shutdown, personnel evacua-tion, or sealing of the spaces:• the fire hazard portions of internal combustion

machinery used for the ship's main propulsionand power generation;

• boiler fronts;• the fire hazard portions of incinerators; and • purifiers for heated fuel oil.Other specific areas may be identified by RINA,considering the unit's characteristics.

3) Activation of any local application system is to givea visual and distinct audible alarm in the protected

space and at continuously manned stations or othersuitable locations to the satisfaction of RINA. Thealarm is to indicate the specific system activated.The system alarm requirements described in thisitem are in addition to, and not a substitute for, thedetection and fire alarm system required elsewherein this Chapter. Grouped visual and audible alarms,as well as indication of the activated zone, are to beprovided in each protected space, in the enginecontrol room, if any, and in the continuouslymanned stations or other suitable locations to thesatisfaction of RINA.

e) Where, in the opinion of RINA, a fire hazard exists inany machinery space for which no specific provisionsfor fire-extinguishing appliances are prescribed in itemsa) to c), a number of approved portable fire extinguish-ers or other means of fire extinction are to be providedin, or adjacent to, that space to the satisfaction of RINA.

In any case, in proximity of the main switchboard and inproximity of any other electric panel or sub-panel ofpower not less than 20 kW a carbon dioxide portableextinguisher is to be provided.

f) Spare charges for fire extinguishers are to be provided inaccordance with item e) of [5.6].

5.3 Fire-extinguishing systems for galley deep-fat cooking equipment

5.3.1 Deep-fat cooking equipment is to be fitted with thefollowing:

a) an automatic or manual extinguishing system tested toan international standard acceptable to RINA (see Note1);

b) a primary and backup thermostat with an alarm to alertthe operator in the event of failure of either thermostat;

c) arrangements for automatically shutting off the electri-cal power upon activation of the extinguishing system;

d) an alarm for indicating operation of the extinguishingsystem in the galley where the equipment is installed;and

e) controls for manual operation of the extinguishing sys-tem which are clearly labelled for ready use by thecrew.

Note 1: Refer to the recommendations by the International Organi-zation for Standardization, in particular, Publication ISO15371:2000 on Fire-extinguishing systems for protection of galleydeep-fat cooking equipment.

5.4 Fire-extinguishing systems for service spaces containing flammable liquids

5.4.1

a) Paint lockers are to be protected by:

1) a carbon dioxide system, designed to give a mini-mum volume of free gas equal to 40% of the grossvolume of the protected space;

2) a dry powder system, designed for at least 0,5 kgpowder/m3 ;


Chapter 9

3) a water-spraying or sprinkler system, designed for 5l/m2min. Water-spraying systems may be connectedto the fire main of the unit; or

4) a system providing equivalent protection, as deter-mined by RINA.

In any case, the system is to be operable from outsidethe protected space

b) Flammable liquid lockers are to be protected by anappropriate fire-extinguishing arrangement approved byRINA. However, areas or spaces intended for the storageof oxygen and acetylene cylinders are to be protectedby a water spraying or sprinkler system, designed for 10l/m2min. Water spraying systems may be connected tothe fire main of the unit

c) For lockers of a deck area of less than 4 m2, which donot give access to accommodation spaces, a carbondioxide portable fire extinguisher sized to provide aminimum volume of free gas equal to 40% of the grossvolume of the space may be accepted in lieu of a fixedsystem. A discharge port is to be arranged in the lockerto allow the discharge of the extinguisher without hav-ing to enter the protected space. The required portablefire extinguisher is to be stowed adjacent to the port.Alternatively, a port or hose connection may be pro-vided to facilitate the use of fire main water.

5.5 Fire-extinguishing systems for diving

5.5.1 Enclosed spaces for diving systems are to be pro-tected by mean a manually operated fixed pressure water-spraying fire-extinguishing system capable of covering theentire system. The fitting of other fixed fire-extinguishingsystems is to be specifically evaluated by RINA.

Protection of diving systems located in open deck areas willbe specifically considered in each case.

5.6 Portable fire extinguishers in accommo-dation, service and working spaces

5.6.1 The accommodation, service and working spaces areto be provided with approved portable fire extinguishers tothe satisfaction of RINA. In this respect, the followingrequirements apply.

a) The number and the type of portable fire extinguishersrequired for these spaces are to be as follows:

• In accommodation and service spaces; one foamextinguisher or equivalent, for each group of adja-cent spaces with easy access between them havingtotal deck area not exceeding 200 m2. However,there is to be at least one of such fire extinguishersfor each 'tweendeck

• In the proximity of any electric switchboard or sec-tion board having a power of 20 kW and upwards:at least one CO2 or powder extinguisher

• In any service space where deep-fat cooking equip-ment is installed: at least one foam extinguisher orequivalent

• In the proximity of any paint or flammable productlocker: at least one foam extinguisher or equivalent

• On the navigating bridge and in other spaces con-taining electrical or electronic equipment or appli-ances necessary for the safety of the unit: one CO2

extinguisher or equivalent.

• In working spaces: at least one foam extinguisher orequivalent.

b) One of the portable fire extinguishers intended for usein any space is to be stowed near the entrance to thatspace.

c) Carbon dioxide fire extinguishers are not to be placed inaccommodation spaces. In control stations and otherspaces containing electrical or electronic equipment orappliances necessary for the safety of the unit, fire extin-guishers are to be provided whose extinguishing mediaare neither electrically conductive nor harmful to theequipment and appliances.

d) Fire extinguishers are to be situated ready for use at eas-ily visible places, which can be reached quickly andeasily at any time in the event of a fire, and in such away that their serviceability is not impaired by theweather, vibration or other external factors. Portable fireextinguishers are to be provided with devices whichindicate whether they have been used.

e) Spare charges are to be provided for 100% of the first 10extinguishers and 50% of the remaining fire extinguish-ers capable of being recharged on board. Not more than60 total spare charges are required. Instructions forrecharging are to be carried on board. For fire extin-guishers which cannot be recharged onboard, addi-tional portable fire extinguishers of the same quantity,type, capacity and number as determined above are tobe provided in lieu of spare charges.

5.7 Additional fire-extinguishing systems for FPSO, FPO and FSO

5.7.1 Fixed deck foam systems

a) General requirements

1) The arrangements for providing foam are to be capa-ble of delivering foam to the entire cargo tank deckarea as well as into any cargo tank the deck of whichhas been ruptured.

2) The deck foam system is to be capable of simple andrapid operation.

3) Operation of a deck foam system at its required out-put is to permit the simultaneous use of the mini-mum required number of jets of water at therequired pressure from the fire main.

A common line for fire main and deck foam line canonly be accepted if it can be demonstrated that the hosenozzles can be effectively controlled by one personwhen supplied from the common line at a pressureneeded for operation of the monitors. Additional foamconcentrate is to be provided for operation of 2 nozzlesfor the same period of time required for the foam sys-tem. The simultaneous use of the minimum required jetsof water is to be possible on deck over the full length ofthe unit, in the accommodation spaces, service spaces,control stations and machinery spaces.


Chapter 9

b) Component requirements

1) Foam solution and foam concentrate

The rate of supply of foam solution is to be not lessthan the greatest of the following:

• 0,6 l/min per square metre of cargo tanks deckarea, where cargo tank deck area means themaximum breadth of the unit multiplied by thetotal longitudinal extent of the cargo tank spaces

• 6 l/min per square metre of the horizontal sec-tional area of the single tank having the largestsuch area, or

• 3 l/min per square metre of the area protected bythe largest monitor, such area being entirely for-ward of the monitor, but not less than 1250l/min.

2) Sufficient foam concentrate is to be supplied toensure at least 20 min of foam generation in units fit-ted with an inert gas installation or 30 min of foamgeneration in units not fitted with an inert gas instal-lation when using solution rates stipulated in item 1above, whichever is the greatest. The foam expan-sion ratio (i.e. the ratio of the volume of foam pro-duced to the volume of the mixture of water andfoam-making concentrate supplied) is not generallyto exceed 12 to 1. Where systems essentially pro-duce low expansion foam but at an expansion ratioslightly in excess of 12 to 1 the quantity of foamsolution available is to be calculated as for 12 to 1expansion ratio systems (see Note 1). When mediumexpansion ratio foam (see Note 2) (between 50 to 1and 150 to 1 expansion ratio) is employed, theapplication rate of the foam and the capacity of amonitor installation are to be to the satisfaction ofRINA.

Note 1: Refer to the Guidelines for the performance and testing cri-teria and surveys of low-expansion foam concentrates forfixed fire-extinguishing systems (MSC/Circ.582 and Corr.1).

Note 2: Refer to the Guidelines for the performance, testing criteriaand surveys of medium expansion foam concentrates forfixed fire-extinguishing systems (MSC/Circ.798).

c) Monitors and foam applicators

1) Foam from the fixed foam system is to be suppliedby means of monitors and foam applicators. At least50 per cent of the foam solution supply rate requiredin the first two items of a) 1) is to be delivered fromeach monitor. On units of less than 4000 tonnesdeadweight, RINA may not require installation ofmonitors but only applicators. However, in suchcase the capacity of each applicator is to be at least25 per cent of the foam solution supply rate requiredin the first two items of b) 1).

2) The capacity of any monitor is to be at least 3l/minute of foam solution per square metre of deckarea protected by that monitor, such area beingentirely forward of the monitor. Such capacity is tobe not less than 1250 l/minute.

3) The capacity of any applicator is to be not less than400 l/min and the applicator throw in still air condi-tions is to be not less than 15 m.

d) Installation requirements

1) Main control station

The main control station for the system is to be suita-bly located outside the cargo area, adjacent to theaccommodation spaces and readily accessible andoperable in the event of fire in the areas protected.

2) Monitors

• The number and position of monitors are to besuch as to comply with previous item a) 1).

• The distance from the monitor to the farthestextremity of the protected area forward of thatmonitor is to be not more than 75 per cent of themonitor throw in still air conditions.

• A monitor and hose connection for a foam appli-cator are to be situated both port and starboardat the front of the poop or accommodationspaces facing the cargo tank deck. On units ofless than 4000 tonnes deadweight a hose con-nection for a foam applicator is to be situatedboth port and starboard at the front of the poopor accommodation spaces facing the cargo tankdeck.

e) Applicators

1) The number of foam applicators provided is to benot less than four. The number and disposition offoam main outlets are to be such that foam from atleast two applicators can be directed on to any partof the cargo tank deck area.

2) Applicators are to be provided to ensure flexibility ofaction during fire-fighting operations and to coverareas screened from the monitors.

f) Isolation valves

1) Valves are to be provided in the foam main, and inthe fire main when this is an integral part of the deckfoam system, immediately forward of any monitorposition to isolate damaged sections of those mains.

5.7.2 Protection of cargo pump roomsEach cargo pump room is to be provided with one of thefollowing fixed fire-extinguishing systems operated from areadily accessible position outside the pump room. Cargopump rooms are to be provided with a system suitable formachinery spaces of category A.

a) A carbon dioxide system complying with the provisionsof the Fire Safety Systems Code and with the following:

1) the alarms giving audible warning of the release offire-extinguishing medium are to be safe for use in aflammable cargo vapour/air mixture; and

2) a notice is to be exhibited at the controls stating that,due to the electrostatic ignition hazard, the system isto be used only for fire extinguishing and not forinerting purposes.

b) A high-expansion foam system complying with the pro-visions of the Fire Safety Systems Code, provided that


Chapter 9

the foam concentrate supply is suitable for extinguishingfires involving the cargoes carried.

c) A fixed pressure water-spraying system complying withthe provisions of the Fire Safety Systems Code.

d) Quantity of fire-extinguishing medium.

Where the extinguishing medium used in the cargo pumproom system is also used in systems serving other spaces,the quantity of medium provided or its delivery rate neednot be more than the maximum required for the largestcompartment.Note 1: The requirements set out in [5.7.2] are applicable, at thediscretion of RINA, to any other enclosed or semi-enclosed spacewithin the tank area.

5.7.3 Protection of loading and discharge manifold areas

The loading and discharge manifold areas which can not beadequately protected by monitors and applicators men-tioned in [5.7.1] are to be protected by:

• foam monitors and applicators covering the entire man-ifold areas in number and having characteristics to thesatisfaction of RINA. Protection of the loading connec-tor room is to be specially considered;

• a water based sprinkler system covering the exterior ofthe discharge control station, if fitted, as well as moor-ing equipment in the area.

5.8 Additional fire-extinguishing systems for FSRU

5.8.1 Water spray system

a) A water spray system for cooling, fire prevention andcrew protection is to be installed to cover:

• exposed cargo tank domes and any exposed parts ofcargo tanks;

• exposed on-deck storage vessels for flammable ortoxic products;

• cargo liquid and vapour discharge and loading man-ifolds and the area of their control valves, and anyother areas where essential control valves are situ-ated and which are to be at least equal to the areaof the drip trays provided; and

• boundaries of superstructures and deckhouses nor-mally manned, cargo compressor rooms, cargopump rooms, store rooms containing high fire riskitems and cargo control rooms, all facing the cargoarea. Boundaries of unmanned forecastle structuresnot containing high fire risk items or equipment donot require water spray protection.

b) The system is to be capable of covering all areas men-tioned in a) with a uniformly distributed water spray ofat least 10 l/m2 per minute for horizontal projected sur-faces and 4 l/m2 per minute for vertical surfaces. Forstructures having no clearly defined horizontal or verti-cal surfaces, the capacity of the water spray system is tobe the greater of the following :

• projected horizontal surface multiplied by 10 l/m2

per minute ; or

• actual surface multiplied by 4 l/m2 per minute.

c) On vertical surfaces, spacing of nozzles protectinglower areas may take account of anticipated rundownfrom higher areas. Stop valves are to be fitted at inter-vals in the spray main for the purpose of isolating dam-aged sections. Alternatively, the system may be dividedinto two or more sections which may be operated inde-pendently provided the necessary controls are locatedtogether, aft of the cargo area. A section protecting anyarea included in the first two bullets of item a) is tocover the whole of the athwartship tank grouping whichincludes that area.

d) The capacity of the water spray pumps is to be sufficientto deliver the required amount of water to all areassimultaneously or, where the system is divided into sec-tions, the arrangements and capacity are to be such asto supply water simultaneously to any one section andto the surfaces specified in the last two bullets of item a).Alternatively, the main fire pumps may be used for thisservice provided that their total capacity is increased bythe amount needed for the spray system. In either case,a connection, through a stop valve, is to be madebetween the fire main and water spray main outside thecargo area.

e) Subject to the approval of RINA, water pumps normallyused for other services may be arranged to supply thewater spray main.

f) All pipes, valves, nozzles and other fittings in the waterspray systems are to be resistant to corrosion by seawa-ter, for which purpose galvanized pipe, for example,may be used, and to the effect of fire.

g) Remote starting of pumps supplying the water spray sys-tem and remote operation of any normally closed valvesin the system are to be arranged in suitable locationsoutside the cargo area, adjacent to the accommodationspaces and readily accessible and operable in the eventof fire in the areas protected.

5.8.2 Dry chemical powder fire-extinguishing system

a) A fixed dry chemical powder type extinguishing systemfor the purpose of fighting fire on the deck in the cargoarea and bow or stern cargo handling areas, if applica-ble, is to be provided.

b) The system is to be capable of delivering powder fromat least two hand hose lines or combination moni-tor/hand hose lines to any part of the above-deckexposed cargo area including above-deck product pip-ing. The system is to be activated by an inert gas such asnitrogen, used exclusively for this purpose and stored inpressure vessels adjacent to the powder containers.

c) The system for use in the cargo area is to consist of atleast two independent self-contained dry chemical pow-der units with associated controls, pressurizing mediumfixed piping, monitors or hand hose lines. For floatingunits with a cargo capacity of less than 1,000 m3 onlyone such unit need be fitted, subject to approval byRINA. A monitor is to be provided and so arranged as toprotect the cargo loading and discharge manifold areasand be capable of actuation and discharge locally andremotely. The monitor is not required to be remotelyaimed if it can deliver the necessary powder to all


Chapter 9

required areas of coverage from a single position. Allhand hose lines and monitors are to be capable of actu-ation at the hose storage reel or monitor. At least onehand hose line or monitor is to be situated at the afterend of the cargo area.

d) A fire-extinguishing unit having two or more monitors,hand hose lines, or combinations thereof, is to haveindependent pipes with a manifold at the powder con-tainer, unless a suitable alternative means is provided toensure proper performance as approved by RINA.Where two or more pipes are attached to a unit, thearrangement is to be such that any or all of the monitorsand hand hose lines are capable of simultaneous orsequential operation at their rated capacities.

e) The capacity of a monitor is to be not less than 10 kg/s.Hand hose lines are to be non-kinkable and be fittedwith a nozzle of on/off operation and discharge at a ratenot less than 3,5 kg/s. The maximum discharge rate is tobe such as to allow operation by one man. The length ofa hand hose line is not to exceed 33 m. Where fixedpiping is provided between the powder container and ahand hose line or monitor, the length of piping is not toexceed that length which is capable of maintaining thepowder in a fluidized state during sustained or intermit-tent use, and which can be purged of powder when thesystem is shut down. Hand hose lines and nozzles are tobe of weather-resistant construction or stored inweather-resistant housing or covers and be readilyaccessible.

f) A sufficient quantity of dry chemical powder is to bestored in each container to provide a minimum 45 s dis-charge time for all monitors and hand hose linesattached to each powder unit. Coverage from fixedmonitors is to be in accordance with the followingrequirements :

• Capacity of fixed monitors (kg/s) each : 10 25 45

• Maximum distance of coverage (m) : 10 30 40

Hand hose lines are to be considered to have a maxi-mum effective distance of coverage equal to the lengthof hose. Special consideration is to be given where areasto be protected are substantially higher than the monitoror hand hose reel locations.

g) Floating units fitted with low bow or stern loading anddischarge arrangements are to be provided with anadditional dry chemical powder unit complete with atleast one monitor and one hand hose line complyingwith the requirements of items a) to g). This additionalunit is to be located such as to protect the bow or sternloading and discharge arrangements. The area of thecargo line forward or aft of the cargo area is to be pro-tected by hand hose lines.

5.8.3 Protection of cargo compressor and pump rooms

The cargo compressor and pump rooms of any ship are tobe provided with a carbon dioxide system as specified inregulation II-2/10 of the 1974 SOLAS Convention, asamended, and Chapter 5 of the Fire Safety Systems Code. Anotice is to be exhibited at the controls stating that the sys-tem is only to be used for fire extinguishing and not for

inerting purposes, due to the electrostatic ignition hazard.The alarms are to be safe for use in a flammable cargovapour-air mixture. For the purpose of this requirement, anextinguishing system is to be provided which would be suit-able for machinery spaces. However, the amount of carbondioxide gas carried is to be sufficient to provide a quantityof free gas equal to 45% of the gross volume of the cargocompressor and pump rooms in all cases.

5.9 Fire detection and alarm system in accommodation and service spaces

5.9.1 General provisions - Engineering specifications

a) Any required fixed fire detection and fire alarm systemwith manually operated call points is to be capable ofimmediate operation at all times. This also means thatthe system is to be so designed as to permit its testingwithout interrupting other systems on board.

b) The fixed fire detection and fire alarm system is not tobe used for any other purpose, except that closing of firedoors and similar functions may be permitted at thecontrol panel. However, if shutdowns actions are per-formed by the system, the requirements of the Emer-gency Shutdown System apply (see Chapter 8).

c) The system and equipment are to be suitably designedto withstand supply voltage variation and transients,ambient temperature changes, vibration, humidity,shock, impact and corrosion normally encountered inunits.

d) Fixed fire detection and fire alarm systems with a zoneaddress identification capability are to be so arrangedthat:

1) means are provided to ensure that any fault(e.g.power break, short-circuit, earth, etc.) occurringin the loop will not render the whole loop ineffec-tive.

Note 1: Loop means an electrical circuit linking detectors of vari-ous sections in a sequence and connected (input and out-put) to the indicating unit(s).

2) all arrangements are made to enable the initial con-figuration of the system to be restored in the event of(e.g. electrical, electronic, computer, etc.) failure

3) the first initiated fire alarm will not prevent any otherdetector from initiating further fire alarms.

4) no loop will pass through a space twice. When thisis not practical (e.g. for large public spaces), the partof the loop which of necessity passes through thespace for a second time is to be installed at the max-imum possible distance from the other parts of theloop.

5.9.2 General provisions - Sources of power supply

There are to be not less than two sources of power supplyfor the electrical equipment used in the operation of the firedetection and fire alarm system, one of which is to be anemergency source. The supply is to be provided by separatefeeders reserved solely for that purpose. Such feeders are to


Chapter 9

run to an automatic change-over switch situated in or adja-cent to the control panel for the fire detection system.

The main (respective emergency) feeder is to run from themain (respective emergency) switchboard to the changeoverswitch without passing through any other distributingswitchboard.

5.9.3 General provisions - Detectors component requirements

a) Detectors are to be operated by heat, smoke or otherproducts of combustion, flame, or any combination ofthese factors. Detectors operated by other factors indic-ative of incipient fires may be considered by RINA pro-vided that they are no less sensitive than such detectors.Flame detectors are only to be used in addition tosmoke or heat detectors.

b) Smoke detectors required in all stairways, corridors andescape routes within accommodation spaces are to becertified to operate before the smoke density exceeds12,5 per cent obscuration per metre, but not until thesmoke density exceeds 2 per cent obscuration permetre. Smoke detectors to be installed in other spacesare to operate within sensitivity limits to the satisfactionof RINA having regard to the avoidance of detectorinsensitivity or oversensitivity.

c) Heat detectors are to be certified to operate before thetemperature exceeds 78°C but not until the temperatureexceeds 54°C, when the temperature is raised to thoselimits at a rate less than 1°C per minute. At higher ratesof temperature rise, the heat detector is to operatewithin temperature limits to the satisfaction of RINAhaving regard to the avoidance of detector insensitivityor oversensitivity.

d) The operation temperature of heat detectors in dryingrooms and similar spaces of a normal high ambient tem-perature may be up to 130°C, and 140° C in saunas.

e) All detectors are to be of a type such that they can betested for correct operation and restored to normal sur-veillance without the renewal of any component.

Flame detectors, whose use may be allowed outside accom-modation and service space areas under certain circum-stances specified below, , are to be to RINA's satisfaction.

5.9.4 General provisions - Installation requirements

a) Sections

1) Detectors and manually operated call points are tobe grouped into sections.

Note 1: Section means group of fire detectors and manually oper-ated call points as shown in the indicating unit(s) requiredin item a) 3) of [3.9.5].

2) A section of fire detectors which covers a controlstation, a service space or an accommodation spaceis not to include a machinery space of category A.For fixed fire detection and fire alarm systems withremotely and individually identifiable fire detectors,a loop covering sections of fire detectors in anaccommodation space, a service space and a con-

trol station is not to include sections of fire detectorsin machinery spaces of category A.

3) Where the fixed fire detection and fire alarm systemdoes not include means of remotely identifying eachdetector individually, no section covering more thanone deck within accommodation spaces, servicespaces and control stations will normally be permit-ted, except for a section which covers an enclosedstairway. In order to avoid delay in identifying thesource of fire, the number of enclosed spacesincluded in each section is to be limited as deter-mined by RINA. In no case will more than 50enclosed spaces be permitted in any section.

b) Positioning of detectors

1) Detectors are to be located for optimum perform-ance. Positions near beams and ventilation ducts orother positions where patterns of air flow couldadversely affect performance or where impact orphysical damage is likely are to beavoided. Detec-tors which are located overhead are to be a mini-mum distance of 0,5 m away from bulkheads,except in corridors, lockers and stairways.

2) The maximum spacing of detectors is to be inaccordance with Tab 6. RINA may require or permitdifferent spacings to that specified in the above tableif based upon test data which demonstrate the char-acteristics of the detectors.

c) Arrangement of electrical wiring

1) Electrical wiring which forms part of the system is tobe so arranged as to avoid galleys, machinery spacesof category A and other enclosed spaces of high firerisk except where it is necessary to provide for firedetection or fire alarm in such spaces or to connectto the appropriate power supply.

2) A loop of fire detection systems with a zone addressidentification capability is not to be damaged atmore than one point by a fire.

5.9.5 General provisions - System control requirements

a) Visual and audible fire signals (see Note 1).Note 1: Refer to the Code on Alarms and Indicators as adopted by

the IMO by resolution A.830(19).

1) The activation of any detector or manually operatedcall point is to initiate a visual and audible fire signalat the control panel and indicating units. If the sig-nals have not received attention within 2 min anaudible alarm is to be automatically soundedthroughout the crew accommodation and servicespaces, control stations and machinery spaces ofcategory A. This alarm sounder system need not bean integral part of the detection system.

2) The control panel is to be located on the navigatingbridge or in the continuously manned central con-trol station.

3) Indicating units are, as a minimum, to denote thesection in which a detector has been activated or amanually operated call point has been operated. Atleast one unit is to be so located that it is easily


Chapter 9

accessible to responsible members of the crew at alltimes. One indicating unit is to be located on thenavigating bridge if the control panel is located inthe main fire control station.

4) Clear information is to be displayed on or adjacentto each indicating unit about the space covered andthe location of the sections.

5) Power supplies and electric circuits necessary for theoperation of the system are to be monitored for lossof power or fault conditions as appropriate. Occur-rence of a fault condition is to initiate a visual andaudible fault signal at the control panel which is tobe distinct from a fire signal.

b) Testing

Suitable instructions and component spares for testingand maintenance are to be provided.

Table 6 : Maximum spacing of detectors

5.9.6 Installation of fire detection system in specific areas

a) General

1) Sufficient manual fire alarm stations are to beinstalled at suitable locations throughout the unit.

One manually operated call point is to be located ateach exit. Manually operated call points is to bereadily accessible in the corridors of each deck sothat no part of the corridor is more than 20 m from amanual call point.

2) In spaces normally occupied by personnel whichare not covered by an automatic fire detection andalarm system, a manually operated fire alarm systemwith signal bells or another adequate audible warn-ing is to be installed.

3) Where a fixed fire detection and fire alarm system isrequired for the protection of spaces other thanthose specified in item b)1), at least one detectorcomplying with the requirements given in this item[5.9] is to be installed in each such space.

b) Accommodation and service spaces

1) An automatic fire detection and alarm system is tobe provided in all accommodation and servicespaces. Sleeping quarters are to be fitted with smokedetectors. All systems or equipment installed to con-form with this paragraph are to comply with Regula-tion II-2/7 of the 1974 SOLAS Convention, asamended and Chapter 9 of the Fire Safety SystemsCode.

2) Smoke detectors are to be installed in all stairways,corridors and escape routes within accommodationspaces. Consideration is to be given to the installa-

tion of special purpose smoke detectors within ven-tilation ducting.

c) Machinery spaces

1) A fixed fire detection and fire alarm system is to beinstalled in:

• periodically unattended machinery spaces;

• machinery spaces where:

- the installation of automatic and remote con-trol systems and equipment has beenapproved in lieu of continuous manning ofthe space, and

- the main propulsion and associated machin-ery, including sources of main electrical sup-ply, is provided with various degrees ofautomatic or remote control and is undercontinuous manned supervision from a con-trol room.

The requirements of this item apply to machineryspaces of category A. For the fire detection systemfor unattended machinery spaces, see also therequirements of Part E, Ch 3, Sec 2 of the Rules.

2) The fixed fire and fire alarm system required in thefirst bullet of point 1) above is to be so designed andthe detectors so positioned as to detect rapidly theonset of fire in any part of the spaces and under anynormal conditions of operation of the machineryand variations of ventilation as required by the pos-sible range of ambient temperatures.

Except in spaces of restricted height and where theiruse is specially appropriate, detection systems usingonly thermal detectors are not permitted. The detec-tion system is to initiate audible and visual alarmsdistinct in both respects from the alarms of any othersystem not indicating fire, in sufficient places toensure that the alarms are heard and observed onthe navigating bridge and by a responsible engineerofficer. When the navigating bridge is unmanned,the alarm is to sound in a place where a responsiblemember of the crew is on duty.

d) Production areas and associated enclosed spaces

Production areas and associated enclosed spaces are tobe protected by a fire detection system. The use of flamedetectors may be allowed at the discretion of RINA.Intervention of the system is to result in automatic shut-down of hydrocarbon flow and ventilation in the area.In addition, the intervention of any detectors in the pro-duction area is to initiate the automatic shutdown ofwellhead valves and production facilities.

5.9.7 Initial and periodical test

a) The function of fixed fire detection and fire alarm sys-tems required in this item [5.9] is to be tested under var-ying conditions of ventilation after installation.

b) The function of fixed fire detection and alarm systems isto be periodically tested to the satisfaction of RINA bymeans of equipment producing hot air at the appropri-ate temperature, or smoke or aerosol particles havingthe appropriate range of density or particle size, or other

Type of detector

Maximum floor area

per detector

Maximum dis-tance apart

between centres

Maximum dis-tance away

from bulkheads

Heat 37 m2 9 m 4,5 m

Smoke 74 m2 11 m 5,5 m


Chapter 9

phenomena associated with incipient fires to which thedetector is designed to respond.

5.10 Gas detection and alarm system5.10.1 a) A fixed automatic gas detection and alarm system is to

be provided to the satisfaction of RINA so arranged as tomonitor continuously all enclosed areas of the unit inwhich an accumulation of flammable gas may beexpected to occur and capable of indicating at the maincontrol stations, on the drill floor and at the requiredemergency control stations, by aural and visual means,the presence and location of an accumulation.

b) The system is to be so designed to allow testing withoutinterrupting other systems on board.

c) The flammable gas detectors are to actuate the alarm atnot more than 25% and at 60% of the lower explosivelimit (LEL). For cargo pump rooms of FPSO, FPO andFSRU the alarms are to be activated when the concen-tration of hydrocarbon gases reaches a pre-set level nothigher than 10% of LEL. Alarms are to automaticallyoperate in the pump room, engine control room, cargocontrol room and navigation bridge;

d) Such system is to be provided for the following areas, asapplicable:• cellar deck;• drill floor;• mud pit area;• shale shaker area;• enclosed spaces containing the open components of

the mud circulation system from the bell nipple tothe mud pits;

• any other hazardous areas, except in zone 0 (seeCh 7, [2]) and areas mechanically ventilated;

• ventilation outlets from hazardous areas;• intakes for ventilation air, including those for

accommodation spaces, service spaces and controlstations.

e) Automatic shutdown of all hydrocarbon flow is to takeplace when gas is detected. Upon detection of hydro-carbon gas with maximum concentration of 60% of LELin the area of the wellhead, turret and production facili-ties, the wellhead valves and production facilities are tobe automatically shut down.

f) The automatic shutdown of ventilation is to take placeupon detected gas with a maximum concentration of25% of LEL in air inlets to non-hazardous areas. Shut-down of ventilation is to include shutdown of fans andclosing of associated dampers. Shutdown of ventilationis to ensure that the detected gas is isolated from igni-tion sources in the ventilated space.

g) In cases where concentration of H2S is expected, equip-ment suitable for measuring H2S is to be installed. Vis-ual and audible alarms are to be activated in the maincontrol stations at 10 ppm H2S.

h) At least two portable gas monitoring devices are to beprovided, each capable of accurately measuring a con-centration of flammable gas.

5.11 Inert gas system

5.11.1 FPSO, FPO and FSOThese units are to be provided with a fixed inert gas systemin accordance with Part C, Ch 4, Sec 2 and 13 of the Rulesfor the Classification of Ships.

5.11.2 FSRUThese units are to be provided with a fixed inert gas systemin accordance with Part E, Ch 9, Sec 9 of the Rules for theClassification of Ships.

5.12 Miscellaneous items

5.12.1 GeneralFire-extinguishing appliances are to be kept in good orderand are to be available for immediate use at all times.

5.12.2 Firefighter's outfitsa) At least five firefighter's outfits and two sets of personal

equipment, complying with item b), are to be provided.

b) A firefighter's outfit is to consist of a set of personalequipment and a breathing apparatus.

1) Personal equipmentPersonal equipment is to consist of:• protective clothing of material to protect the skin

from the heat radiating from the fire and fromburns and scalding by steam. The outer surface isto be water-resistant;

• boots of rubber or other electrically non-con-ducting material;

• a rigid helmet providing effective protectionagainst impact;

• an electric safety lamp (hand lantern) of anapproved type with a minimum burning periodof three hours. Electric safety lamps on tankersand those intended to be used in hazardousareas are to be of an explosion-proof type; and

• an axe with a handle provided with high-voltageinsulation.

2) Breathing apparatusThis is to be either a self-contained compressed air-operated breathing apparatus for which the volumeof air contained in the cylinders is at least 1200 l, oranother self-contained breathing apparatus which iscapable of functioning for at least 30 minutes. All aircylinders for breathing apparatus are to be inter-changeable.

3) LifelineFor each breathing apparatus, a fireproof lifeline ofat least 30 m length is to be provided. The lifeline isto successfully pass an approval test by statical loadof 3,5 kN for 5 min without failure. In addition, thelifeline is to have a minimum breaking load of 10kN. The lifeline is to be capable of being attached bymeans of a snaphook to the harness of the apparatusor to a separate belt in order to prevent the breathingapparatus becoming detached when the lifeline isoperated. Lifelines and associated fittings (thimbles,hooks, etc) intended to be used in hazardous areas


Chapter 9

for gas are to be made of materials ensuring theabsence of sparks.

c) Spare charges are to be provided for each breathingapparatus to the satisfaction of RINA. However, at leasttwo spare charges for each breathing apparatus are to beprovided.

d) The firefighter's outfits are, in general, to be stored so asto be easily accessible and ready for use and, whereapplicable, one of the outfits is to be located at a posi-tion readily accessible from any helideck.

5.12.3 Arrangements in machinery and working spaces

a) Means are to be provided for stopping ventilating fansserving machinery and working spaces and for closingall doorways, ventilators, annular spaces around funnelsand other openings to such spaces. These means are tobe capable of being operated from outside such spacesin case of fire.

b) Machinery driving forced and induced draught fans,electric motor pressurization fans, fuel oil transferpumps, fuel oil unit pumps and other similar fuel pumpsis to be fitted with remote controls situated outside thespace concerned so that it may be stopped in the eventof a fire arising in the space in which it is located.

c) Every fuel oil suction pipe from a storage, settling ordaily service tank situated above the double bottom is tobe fitted with a cock or valve capable of being closedfrom outside the space concerned in the event of a fire

arising in the space in which such tanks are situated. Inthe special case of deep tanks situated in any shaft orpipe tunnel, valves are to be fitted on the tanks but con-trol in the event of fire may be effected by means of anadditional valve on the pipeline or lines outside the tun-nel(s).

5.12.4 Storage of gas cylinders

Where more than one cylinder of oxygen and more thanone cylinder of acetylene are carried simultaneously, suchcylinders are to be arranged in accordance with the follow-ing:

a) Permanent piping systems for oxyacetylene systems areacceptable provided that they are designed having dueregard to standards and codes of practice to the satisfac-tion of RINA.

b) Where two or more cylinders of each gas are intendedto be carried in enclosed spaces, separate dedicatedstorage rooms are to be provided for each gas.

c) Storage rooms are to be constructed of steel, and bewell ventilated and accessible from the open deck.

d) Provision is to be made for the expeditious removal ofcylinders in the event of fire.

e) "NO SMOKING" signs are to be displayed in the gas cyl-inder storage rooms.

f) Fixed fire-extinguishing system, is to comply with therequirements of this Chapter 9.


Chapter 10


CHAPTER 10 MOORING SYSTEM FOR THE SHUTTLE

1 General and references

1.1 Stern or bow mooring

1.1.1 The mooring system for the shuttle is to be designedin accordance with the relevant requirements stated in theOCIMF Code: "Standards for Equipment employed in theMoorings of Ships at Single Point Moorings".If the scantling of the various components is carried out onthe basis of loads derived from model tests accepted by

RINA, such scantling will be carefully examined by RINAand the description of the limit for the environmental condi-tions assumed to determine the above loads is to be insertedin the Operating Manual.

1.2 Mooring alongside

1.2.1 The mooring system for the shuttle alongside the unitwill be carefully examined by RINA.

Chapter 11


CHAPTER 11 MARINE OPERATIONS

1 General and references

1.1

1.1.1 Marine operations are those which take place duringinstallation, disconnection for extraordinary repairs and thetowing away of the unit.For these operations, reference is made to the RINA Rulesfor the Classification of Steel Fixed Offshore Platforms.

Chapter 12

CHAPTER 12 HELICOPTER DECK


1.1

1.1.1 The following provisions have no bearing on and donot exempt units from compliance with any nationalauthority civil aviation regulations to which the site in ques-tion is subject.

As far as concerns the structural scantlings of the helicopterdeck, reference is made to the relevant provisions of Chap-ter 13 of the Rules for the Construction and Classification ofMobile Offshore Drilling Units and other Similar Units.

As regards the general layout, approach sector, visual signs,drainage arrangements, etc., reference is made to the appli-cable requirements of Pt B, Ch 9, Sec 10 of the Rules for theClassification of Ships.

As far as concerns fire protection, as stated under item[1.1.2] of Chapter 1, the requirements of item [2] are notapplicable for the purpose of classification, except whereRINA carries out surveys relevant to fire protection statutoryrequirements on behalf of the flag Administration. In suchcases, the fire protection statutory requirements are consid-ered a matter of class and therefore compliance with theserequirements is also verified by RINA for classification pur-poses.

2 Fire protection for helicopter facili-ties

2.1 Application

2.1.1 In addition to complying with the requirementsreferred to above, as appropriate, units equipped withhelidecks are to comply with the following.

2.1.2 Where helicopters land or conduct winching opera-tions on an occasional or emergency basis on units withouthelidecks, fire-fighting equipment fitted in accordance withthe requirements in Pt C, Ch 4, Sec 10 of the Rules for theClassification of Ships may be used. This equipment is to bemade readily available in close proximity to the landing orwinching areas during helicopter operations.

2.1.3 Items [2.1.2], [2.4.1] f) and [2.7] do not containrequirements applicable for the purpose of classification;they have been reproduced for reference purposes only.

2.2 Structure

2.2.1 Construction of steel or other equivalent materials

In general, the construction of the helidecks is to be of steelor other equivalent materials. If the helideck forms the deck-

head of a deckhouse or superstructure, it is to be insulatedto A-60 class standard.

2.2.2 Construction of aluminium or other low melting metals

If RINA permits aluminium or other low melting point metalconstruction that is not made equivalent to steel, the follow-ing provisions are to be satisfied:

a) if the platform is cantilevered over the side of the unit,after each fire on the unit or on the platform, the plat-form is to undergo a structural analysis to determine itssuitability for further use; and

b) if the platform is located above the unit's deckhouse orsimilar structure, the following conditions apply:

1) the deckhouse top and bulkheads under the plat-form are to have no openings;

2) windows under the platform are to be provided withsteel shutters; and

3) after each fire on the platform or in close proximity,the platform is to undergo a structural analysis todetermine its suitability for further use.

2.3 Means of escape

2.3.1 A helideck is to be provided with both a main and anemergency means of escape and access for fire-fighting andrescue personnel; these are to be located as far apart fromeach other as is practicable and preferably on oppositesides of the helideck.

2.4 Fire-fighting appliances

2.4.1 In close proximity to the helideck, the following fire-fighting appliances are to be provided and stored near themeans of access to that helideck:

a) at least two dry powder extinguishers having a totalcapacity of not less than 45 kg

b) carbon dioxide extinguishers of a total capacity of notless than 18 kg or equivalent

c) a suitable foam application system consisting of moni-tors or foam making branch pipes capable of deliveringfoam to all parts of the helideck in all weather condi-tions in which the helicopter can operate. The system isto be capable of delivering a discharge rate as requiredin Tab 7 for at least five minutes. The principal agent isto meet the applicable performance standards of theInternational Civil Aviation Organization - Airport Serv-ices Manual, Part 1 - Rescue and Firefighting, Chapter 8- Extinguishing Agent Characteristics,Paragraph 8.1.5 -Foam Specifications Table 8-1, Level B foam, and besuitable for use with salt water.


Chapter 12

d) at least two nozzles of an approved dual-purpose type(jet/spray) and hoses sufficient to reach any part of thehelideck

e) in addition to the requirements of Ch 9, [5.12.2], twosets of firefighter's outfits, and

f) at least the following equipment, stored in a mannerthat provides for immediate use and protection from theelements:

• adjustable wrench

• blanket (fire-resistant)

• cutters, bolt 60 cm

• hook, grab or salving

• hacksaw, heavy duty complete with 6 spare blades

• ladder

• lifeline of 5 mm diameter x 15 m in length

• pliers, side cutting

• set of assorted screwdrivers, and

• harness knife complete with sheath.

Table 1 : Foam solution discharge rate

2.5 Drainage facilities in way of helidecks

2.5.1 Drainage facilities in way of helidecks are to be con-structed of steel and lead directly overboard independent ofany other system and designed so that drainage does not fallon to any part of the unit.

2.6 Helicopter refuelling and hangar facili-ties

2.6.1 Where the unit has helicopter refuelling and hangarfacilities, the following requirements are to be compliedwith:

a) A designated area is to be provided for the storage offuel tanks, which is to be:

1) as remote as practicable from accommodationspaces, escape routes and embarkation stations, and

2) isolated from areas containing a source of vapourignition.

b) The fuel storage area is to be provided with arrange-ments whereby fuel spillage may be collected and

drained to a safe location.

c) Tanks and associated equipment are to be protectedagainst physical damage and from a fire in an adjacentspace or area.

d) Where portable fuel storage tanks are used, specialattention is to be given to:

1) design of the tank for its intended purpose

2) mounting and securing arrangements

3) electric bonding, and

4) inspection procedures.

e) Storage tank fuel pumps are to be provided with meanswhich permit shutdown from a safe remote location inthe event of fire. Where a gravity fuelling system isinstalled, equivalent closing arrangements are to be pro-vided to isolate the fuel source.

f) The fuel pumping unit is to be connected to one tank ata time. The piping between the tank and the pumpingunit is to be of steel or equivalent material, as short aspossible, and protected against damage.

g) Electrical fuel pumping units and associated controlequipment are to be of a type suitable for the locationand potential hazards.

h) Fuel pumping units are to incorporate a device whichwill prevent over-pressurization of the delivery or fillinghose.

i) Equipment used in refuelling operations is to be electri-cally bonded.

j) "No smoking" signs are to be displayed at appropriatelocations.

k) Hangar, refuelling and maintenance facilities shall betreated as category A machinery spaces with regard tostructural fire protection, and fixed fire-extinguishingand detection system requirements.

l) Electrical equipment and wiring in enclosed hangars orclosed spaces containing refuelling installations are tocomply with the following requirements:

1) they are to be of a type suitable for use in an explo-sive petrol and air mixture (see Note 1).

Note 1: Refer to the recommendations of the International Electro-technical Commission, in particular publication 60079.

2) if installed in an exhaust ventilation duct, they are tobe of a type approved for use in explosive petrol andair mixtures and the outlet from any exhaust duct isto be sited in a safe position, having regard to otherpossible sources of ignition.

2.7 Operations manual and fire-fighting service

2.7.1 Operations manualEach helicopter facility is to have an operations manual,including a description and a checklist of safety precau-tions, procedures and equipment requirements. This man-ual may be part of the unit's emergency responseprocedures. The procedures and precautions to be followedduring refueling operations are to be in accordance withrecognized safe practices and contained in the operationsmanual.

2.7.2 Fire-fighting servicesFire-fighting personnel consisting of at least two personstrained for rescue and fire-fighting duties and fire-fighting

CategoryHelicopter overall

lengthFoam solution

discharge rate (litres/min)

H1 less than 15 m 250

H2 at least 15 mbut less than 24 m

500

H3 at least 24 mbut less than 35 m

800


Chapter 12

equipment are to be immediately available at all timeswhen helicopter operations are expected.

Fire-fighting personnel are to be present during refuelingoperations. However, the fire-fighting personnel are not to

be involved in refuelling activities. On-board refreshertraining is to be carried out and additional supplies of fire-fighting media are to be provided for training and for testingof the equipment.
