1、Code for the Constructionand Equipment ofMobile OffshoreDrilling UnitsConsolidated Edition, 2001ELECTRONIC EDITIONBINTERNATIONAL MARITIME ORGANIZATIONLondon, 2001First published in 1980by the INTERNATIONAL MARITIME ORGANIZATION4 Albert Embankment, London SE1 7SRSecond edition 2001Printed by the Inte
2、rnational Maritime Organization, London24681097531ISBN 978-92-801-5109-1IMO PUBLICATIONSales number: IA811ECopyright # IMO 2001All rights reserved.No part of this publication may be reproduced,stored in a retrieval system or transmitted in any formor by any means without prior permission in writingf
3、rom the International Maritime Organization.Print edition (ISBN 978-92-801-5109-1)Published in 2001by the INTERNATIONAL MARITIME ORGANIZATION4 Albert Embankment, London SE1 7SRElectronic edition, 2007IMO PUBLICATIONSales number: EA811ECopyright # IMO2001All rights reserved.No part of this publicatio
4、n may be reproduced,stored in a retrieval system or transmitted in any formor by any means without prior permission in writingfrom the International Maritime Organization.ForewordThe Code for the Construction and Equipment of Mobile OffshoreDrilling Units, 1989 (1989 MODU Code) was adopted by Assemb
5、lyresolution A.649(16) for mobile offshore drilling units, the keels of whichare laid or are at a similar stage of construction on or after 1 May 1991. The1989 MODU Code supersedes the 1979 MODU Code adopted byAssembly resolution A.414(XI).The Maritime Safety Committee, at its fifty-ninth session (1
6、3 to 24 May1991), adopted amendments to the 1989 MODU Code (originallycirculated in MSC/Circ.561) and decided that, to maintain compatibilitywith SOLAS, the amendments should become effective on 1 February1992. New section 10.13, Radio life-saving appliances, and new chapter 11,Radiocommunication in
7、stallations, introduced by the amendments apply toall MODUs the keels of which are laid or are at a similar stage ofconstruction on or after 1 May 1991, in the same way as the 1988(GMDSS) amendments to SOLAS apply to ships. The Committee alsorecommended that Member Governments encourage the fitting
8、of allMODUs with the GMDSS equipment specified in the amendments to the1989 Code, and ensure that all MODUs comply with section 10.13 of theamendments to the 1989 Code not later than 1 February 1995, and withchapter 11 of the amendments not later than 1 February 1999.The Maritime Safety Committee, a
9、t its sixty-third session (16 to 25 May1994), adopted further amendments to the 1989 MODU Code (resolutionMSC.38(63) to introduce the harmonized system of survey and certifica-tion (HSSC) into the Code (amendments to chapter 1 and the appendix);provide guidelines for vessels with dynamic positioning
10、 systems (amend-ments to chapters 4 and 5); and provisions for helicopter facilities (newchapter 13). The Committee decided that the amendments introducing theHSSC system should become effective on the same date as the 1988 SOLASand Load Line Protocols relating to the HSSC (i.e. 3 February 2000), an
11、dthat those providing guidelines for vessels with dynamic positioning systemsand provisions for helicopter facilities should become effective on 1 July1994.In 1995, the Assembly adopted the Code on Alarms and Indicators, 1995(resolution A.830(19), which is intended to provide general designguidance
12、and to promote uniformity of type, location and priority forthose alarms and indicators which are required by the 1974 SOLASConvention, MARPOL 73/78 and other IMO instruments, including the1989 MODU Code. The Assembly recommended Governments, inter alia,to take appropriate steps to apply the Code an
13、d to use it as an internationalsafety standard for designing alarms and indicators for ships (and MODUs)and their equipment and machinery.This publication contains the consolidated text of the 1989 MODU Codeand the 1991 and 1994 amendments, but does not include the relevantiiiprovisions of the Code
14、on Alarms and Indicators, 1995. The intention ofthis publication is to provide an easy reference to up-to-date requirementsof the 1989 MODU Code.ivForewordContentsPagePreamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Chapter 1 General1.1 Purpose . 31.2 Application
15、. . . 31.3 Definitions. . . 31.4 Exemptions . . 81.5 Equivalents. . . 81.6 Surveys and certification. . 81.7 Control . 141.8 Casualties. . . . 151.9 Review of the Code . . . . 15Chapter 2 Construction, strength and materials2.1 General . 172.2 Design loads. . 172.3 Structural analysis . . 182.4 Spec
16、ial considerations for surface units. . . . 192.5 Special considerations for self-elevating units . . . 192.6 Special considerations for column-stabilized units . . . . 202.7 Fatigue analysis . . . . 222.8 Materials . . . . 222.9 Construction portfolio. . . 222.10 Welding. 222.11 Testing . 22Chapter
17、 3 Subdivision, stability and freeboard3.1 Inclining test . 233.2 Righting moment and heeling moment curves . . 233.3 Intact stability criteria. . . . 26vPage3.4 Subdivision and damage stability . . . .273.5 Extent of damage . .293.6 Watertight integrity.313.7 Freeboard. . . .32Chapter 4 Machinery i
18、nstallations for all types of units4.1 General .374.2 Machinery requirements. .384.3 Steam boilers and boiler feed systems.384.4 Steam pipe systems .394.5 Machinery controls .394.6 Air pressure systems . . . .404.7 Arrangements for oil fuel, lubricating oil and otherflammable oils.404.8 Bilge pumpin
19、g arrangements. . .404.9 Ballast pumping arrangements oncolumn-stabilized units . .424.10 Protection against flooding. . . .444.11 Anchoring arrangements for surface andcolumn-stabilized units . .444.12 Dynamic positioning systems . .46Chapter 5 Electrical installations for all types of units5.1 Gen
20、eral electrical requirements .475.2 Main source of electrical power . . . .475.3 Emergency source of electrical power . . . .485.4 Starting arrangements for emergency generators .525.5 Precautions against shock, fire and other hazards ofelectrical origin. . . .535.6 Internal communication. .56viCont
21、entsPageChapter 6 Machinery and electrical installationsin hazardous areas for all types of units6.1 Zones . . 576.2 Classification of hazardous areas . . . . 576.3 Openings, access and ventilation conditions affectingthe extent of hazardous areas . . 586.4 Ventilation of spaces . . . . 596.5 Emerge
22、ncy conditions due to drilling operations. 596.6 Electrical installations in hazardous areas. . . 606.7 Machinery installations in hazardous areas . 61Chapter 7 Machinery and electrical installationsfor self-propelled units7.1 General . 637.2 Means of going astern . . . 647.3 Steam boilers and boile
23、r feed systems. 647.4 Machinery controls . 647.5 Steering gear. . 667.6 Electric and electrohydraulic steering gear . 687.7 Communication between the navigating bridgeand the engine-room. . . . 687.8 Engineers alarm . . . 687.9 Main source of electrical power . . . . 687.10 Emergency source of elect
24、rical power . . . . 69Chapter 8 Periodically unattended machinery spacesfor all types of unit8.1 General . 718.2 Application. . . 718.3 Fire safety. . . . 718.4 Protection against flooding. . . . 738.5 Bridge control of propulsion machinery. . . 74ContentsviiPage8.6 Communication . . . 758.7 Alarm s
25、ystem . 758.8 Special requirements for machinery, boilerand electrical installations . 758.9 Safety systems. 76Chapter 9 Fire safety9.1 Structural fire protection . 799.2 Protection of accommodation spaces, service spacesand control stations . 829.3 Means of escape . . . 869.4 Fire pumps, fire mains
26、, hydrants and hoses. 889.5 Fire-extinguishing systems in machinery spacesand in spaces containing fired processes . . . 909.6 Portable fire extinguishers in accommodation, serviceand working spaces . 919.7 Fire detection and alarm system . . . . 919.8 Gas detection and alarm system. 919.9 Firemens
27、outfits . . . 929.10 Arrangements in machinery and working spaces . 929.11 Provisions for helicopter facilities . . . 929.12 Storage of gas cylinders . . 949.13 Miscellaneous items. 95Chapter 10 Life-saving appliances and equipment10.1 General . 9710.2 Survival craft . 9710.3 Survival craft muster a
28、nd embarkation arrangements . . 9810.4 Survival craft launching stations. 9910.5 Stowage of survival craft. . 9910.6 Survival craft launching and recovery arrangements . . . 100viiiContentsPage10.7 Rescue boats . 10110.8 Stowage of rescue boats . . 10110.9 Rescue boat embarkation, launching and reco
29、veryarrangements . 10110.10 Lifejackets . . . 10210.11 Immersion suits . . . 10210.12 Lifebuoys . . . . 10210.13 Radio life-saving appliances . . . 10310.14 Distress flares . 10310.15 Line-throwing appliances . 10310.16 Emergency warnings . . . . 10410.17 Operating instructions . . . 10410.18 Operat
30、ional readiness, maintenance and inspections. . . 104Chapter 11 Radiocommunication installations11.1 Application. . . 10711.2 General . 10711.3 Self-propelled units under way . 10711.4 Units when towed, or self-propelled and accompaniedby escort ships . . . . 10711.5 Units stationary at the site or
31、engaged in drillingoperations . . . 10811.6 Helicopter communications . . . 10911.7 Internal communications . 10911.8 Performance standards . . . 10911.9 Gas explosion danger. . . . 11011.10 Survey of the radio station . . . . 111Chapter 12 Lifting devices12.1 Cranes. . 11312.2 Personnel lifts. 1141
32、2.3 Drilling derricks . . . 114ContentsixPageChapter 13 Helicopter facilities13.1 General . 11513.2 Definitions. . . 11513.3 Construction . 11513.4 Arrangements . 11713.5 Visual aids . . . 117Chapter 14 Operating requirements14.1 Operating manuals . 12514.2 Dangerous goods. . . 12814.3 Pollution pre
33、vention . . . . 12814.4 Towing . 12814.5 Transfer of material, equipment or personnel . . . 12914.6 Diving systems . . . . 12914.7 Safety of navigation . 12914.8 Emergency procedures. . . 13014.9 Emergency instructions . . 13114.10 Training manuals . . 13214.11 Practice musters and drills . . . . 13
34、214.12 On-board training and instructions . . 13314.13 Records. 134Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135xContentsPreamble1 This Code has been developed to provide an international standard formobile offshore drilling units of new construction which w
35、ill facilitate theinternational movement and operation of these units and ensure a level ofsafety for such units, and for personnel on board, equivalent to that requiredby the International Convention for the Safety of Life at Sea, 1974, asamended, and the International Convention on Load Lines, 196
36、6, asamended, for conventional ships engaged on international voyages.2 Throughout the development of the Code, it was recognized that itmust be based upon sound design and engineering principles and experiencegained from operating such units; it was further recognized that designtechnology of mobil
37、e offshore drilling units is not only a complextechnology but is rapidly evolving and that the Code should not remainstatic but be re-evaluated and revised as necessary. To this end theOrganization will periodically review the Code, taking into account bothexperience and future development.3 Any exi
38、sting unit which complies with the provisions of this Codeshould be considered eligible for issuance of a certificate in accordance withthis Code.4 The Code is not intended to prohibit the use of an existing unitsimply because its design, construction and equipment do not conform tothe requirements
39、of this Code. Many existing mobile offshore drilling unitshave operated successfully and safely for extended periods of time and theiroperating history should be considered in evaluating their suitability toconduct international operations.5 The coastal State may permit any unit designed to a lower
40、standardthan that of the Code to engage in operations having taken account of thelocal environmental conditions. Any such unit should, however, complywith safety requirements which in the opinion of the coastal State areadequate for the intended operation and ensure the overall safety of the unitand
41、 the personnel on board.6 The Code does not include requirements for the drilling of subseawells or the procedures for their control. Such drilling operations are subjectto control by the coastal State.1Chapter 1General1.1 PurposeThe purpose of the Code for the Construction and Equipment of MobileOf
42、fshore Drilling Units, 1989, as amended, hereinafter referred to as theCode, is to recommend design criteria, construction standards and othersafety measures for mobile offshore drilling units so as to minimize the riskto such units, to the personnel on board and to the environment.1.2 Application1.
43、2.1 The Code applies to mobile offshore drilling units as defined in 1.3.1to 1.3.4, the keels of which are laid or which are at a similar stage ofconstruction on or after 1 May 1991.1.2.2 The coastal State may impose additional requirements regarding theoperation of industrial systems not dealt with
44、 by the Code.1.3 DefinitionsFor the purpose of this Code, unless expressly provided otherwise, theterms used therein have the meanings defined in the following paragraphs.1.3.1 Mobile offshore drilling unit or unit is a vessel capable of engaging indrilling operations for the exploration for or expl
45、oitation of resourcesbeneath the sea-bed such as liquid or gaseous hydrocarbons, sulphur or salt.1.3.2 Surface unit is a unit with a ship- or barge-type displacement hull ofsingle or multiple hull construction intended for operation in the floatingcondition.1.3.3 Self-elevating unit is a unit with m
46、ovable legs capable of raising its hullabove the surface of the sea.1.3.4 Column-stabilized unit is a unit with the main deck connected to theunderwater hull or footings by columns or caissons.1.3.5 Administration means the Government of the State whose flag the unitis entitled to fly.1.3.6 Coastal
47、State means the Government of the State exercisingadministrative control over the drilling operations of the unit.1.3.7 Organization means the International Maritime Organization (IMO).1.3.8 Certificate means Mobile Offshore Drilling Unit Safety Certificate.1.3.9 1974 SOLAS Convention means the Inte
48、rnational Convention for theSafety of Life at Sea, 1974, as amended.31.3.10 1966 Load Line Convention means the International Convention onLoad Lines, 1966.1.3.11 Mode of operation means a condition or manner in which a unit mayoperate or function while on location or in transit. The modes of operat
49、ionof a unit include the following:.1 Operating conditions conditions wherein a unit is on locationfor the purpose of conducting drilling operations, and combinedenvironmental and operational loadings are within the appro-priate design limits established for such operations. The unitmay be either afloat or supported on the sea-bed, as applicable.2 Severe storm conditions conditions wherein a unit may besubjected to the most severe environmental loading for whichthe unit is designed. Drilling operations are assumed to havebeen discontinued due to the severit
