IMO IA807E-2007 Guidelines for the Design and Construction of Offshore Supply Vessels 2006.pdf

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1、 Guidelines for theDesign and Construction ofOffshore Supply Vessels 2006BINTERNATIONALMARITIMEORGANIZATIONLondon, 2007Published in 2007by the INTERNATIONAL MARITIME ORGANIZATION4 Albert Embankment, London SE1 7SRPrinted in the United Kingdom by MPG Books Ltd, Bodmin24681097531ISBN 978-92-801-1486-7

2、IMO PUBLICATIONSales number: IA807ECopyright # International Maritime Organization 2007All 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 writing from theInternational Maritime Organizat

3、ion.ForewordGuidelines for the design and construction of offshore supply vessels wereadopted by the Assembly of the Organization in 1981 by resolutionA.469(XII). These Guidelines included guidance on intact stability thatwas later incorporated into the Code on Intact Stability for all Types ofShips

4、 covered by IMO Instruments. To take account of the adoption ofthis Code and amendments to the SOLAS Convention that have enteredinto force after 1981, new Guidelines for the design and construction ofoffshore supply vessels were adopted in 2006. These new Guidelines alsoinclude a form of Document o

5、f Compliance for offshore supply vessels.iiiContentsPagePreamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 General1.1 Application. . 21.2 Definitions. . 21.3 Principles governing near-coastal voyages . 32 Intact stability 43 Subdivision and damage stability3.1 General

6、43.2 Damage assumptions . . . 43.3 Damage stability criteria. 53.4 Assumptions for calculating damage stability. . . . . 63.5 Subdivision . 74 Machinery and electrical installations . 75 Fire protection . 76 Life-saving appliances 77 Radiocommunications 78 Documentation . 89 Transport of hazardous a

7、nd liquid noxious substancesin bulk . 8Appendix 1: Operational matters pertaining to stability criteriafor offshore supply vessels. . 9Appendix 2: Form of the Offshore Supply VesselDocument of Compliance . 10Resolution MSC.235(82) 12ivGuidelines for the design and constructionof offshore supply vess

8、els, 2006Preamble1 These Guidelines have been developed for the design andconstruction of new offshore supply vessels with a view to promotingthe safety of such vessels and their personnel, recognizing the uniquedesign features and service characteristics of these vessels.2 These Guidelines furtherm

9、ore provide a standard of safety equivalentto the relevant requirements of the International Convention for the Safetyof Life at Sea, 1974, as amended, and in particular to the stability criteria ofthe Code on Intact Stability for all Types of Ships Covered by IMOInstruments (IS Code), as amended.3

10、Recognizing that, for certain limited areas of operation and servicecharacteristics, it is unreasonable to apply these Guidelines in full, thepossibility of relaxations has been introduced by the concept of near-coastal voyage.4 Provisions for offshore supply vessels carrying more than 12industrial

11、personnel are not included in these Guidelines.5 When an offshore supply vessel is used for special purposes, such asdiving assistance or oceanographic surveys, the persons on board inconnection with these special purposes should be treated as specialpersonnel.6 The content of these Guidelines was r

12、eviewed in 2006 in order toupdate the references contained therein, to enhance subdivision anddamage stability requirements, to remove duplication of the contentbetween the Guidelines and the IS Code, and to introduce an appropriatedocumentation of compliance with the Guidelines.11 General1.1 Applic

13、ation1.1.1 Every new decked offshore supply vessel of 24 m and over but notmore than 100 m in length should comply with the provisions of parts 2and 3 of these Guidelines. The intact and damage stability of a vessel ofmore than 100 m in length should be to the satisfaction of theAdministration.1.1.2

14、 Parts 4, 5, 6 and 7 of these Guidelines apply to every new deckedoffshore supply vessel of 500 gross tonnage and above.1.1.3 Where these Guidelines set forth alternative safety standards tothose contained in the Convention and where the Convention isapplicable, these Guidelines may be applied under

15、 the equivalencyprovisions of regulation 5 of chapter I of the Convention.1.1.4 Vessels fitted with dynamic positioning equipment shouldcomply with the guidelines developed by the Organization.*1.1.5 For a vessel engaged in near-coastal voyages, the principles in 1.3of these Guidelines should guide

16、the Administration in the developmentof its national standards. Relaxations from the requirements of theseGuidelines may be permitted by an Administration for vessels engaged innear-coastal voyages off its own coasts provided the operating conditionsare, in the opinion of that Administration, such a

17、s to render compliancewith the Guidelines unreasonable or unnecessary.1.1.6 Unless expressly provided otherwise, an existing offshore supplyvessel should be required to comply with these Guidelines as far as ispracticable in the opinion of the Administration.1.1.7 Where a vessel other than an offsho

18、re supply vessel, as defined in1.2.1, is employed on a similar service, the Administration should determinethe extent to which compliance with these Guidelines is required.1.2 DefinitionsFor the purpose of these Guidelines, unless expressly provided otherwise:*Refer to the Guidelines for vessels wit

19、h dynamic positioning systems (MSC/Circ.645) andGuidelines for dynamic positioning system (DP) operator training (MSC/Circ.738).Guidelines for design and construction of OSVs, 200621.2.1 Offshore supply vessel means a vessel:.1 which is primarily engaged in the transport of stores,materials and equi

20、pment to offshore installations; and.2 which is designed with accommodation and bridge erec-tions in the forward part of the vessel and an exposed cargodeck in the after part for the handling of cargo at sea.1.2.2 New vessel means a vessel the keel of which is laid or which is at asimilar stage of c

21、onstruction six months after the date on which theseGuidelines were adopted.1.2.3 Existing vessel means a vessel which is not a new vessel.1.2.4 The terms length (L) of a vessel, perpendiculars, weather-tight and summer load line have the meanings as defined in theProtocol of 1988 relating to the In

22、ternational Convention on Load Lines,1966, as amended.1.2.5 Administration means the Government of the State whose flag thevessel is entitled to fly.1.2.6 Offshore installation means a marine structure located at anoffshore site.1.2.7 IS Code means the Code on Intact Stability for all Types of Ships

23、Covered by IMO Instruments, as amended.1.2.8 Near-coastal voyage means a voyage in the vicinity of the coast of aState as defined by the Administration of that State.1.2.9 Convention means the International Convention for the Safety ofLife at Sea, 1974, as amended.1.3 Principles governing near-coast

24、al voyages1.3.1 The Administration defining near-coastal voyages for the purposeof these Guidelines should not impose design and construction standardsfor a vessel entitled to fly the flag of another State and engaged in suchvoyages in a manner resulting in a more stringent standard for such a vesse

25、lthan for a vessel entitled to fly its own flag. In no case should theAdministration impose, in respect of a vessel entitled to fly the flag ofanother State, standards in excess of these Guidelines for a vessel notengaged in near-coastal voyages.1.3.2 With respect to a vessel regularly engaged in ne

26、ar-coastal voyagesoff the coast of another State, the Administration should prescribe design3Guidelines for design and construction of OSVs, 2006and construction standards for such a vessel at least equal to thoseprescribed by the Government of the State off whose coast the vessel isengaged, provide

27、d such standards do not exceed these Guidelines inrespect of a vessel not engaged in near-coastal voyages.1.3.3 A vessel which extends its voyage beyond a near-coastal voyageshould comply with these Guidelines.2 Intact stabilityThe vessel should comply with the relevant provisions for offshore suppl

28、yvessels contained in the IS Code. Reference should be made to appendix 1for operational matters related to stability criteria.3 Subdivision and damage stability3.1 GeneralTaking into account, as initial conditions before flooding, the standardloading conditions required by the relevant provisions o

29、f part B of the ISCode and the damage assumptions in 3.2, the vessel should comply withthe damage stability criteria as specified in 3.3.3.2 Damage assumptions3.2.1 Damage should be assumed to occur anywhere in the vesselslength between transverse watertight bulkheads.3.2.2 The assumed extent of dam

30、age should be as follows:.1 longitudinal extent: vessels with the length (L) greater than43 m, 3 m plus 3% of the vessels length. For those withlength (L) not greater than 43 m, 10% of the vessels length,.2 transverse extent: transverse extent of damage should beassumed as 760 mm, measured inboard f

31、rom the side of thevessel perpendicularly to the centreline at the level of thesummer load waterline,.3 vertical extent: from the underside of the cargo deck, or thecontinuation thereof, for the full depth of the vessel.4Guidelines for design and construction of OSVs, 20063.2.3 A transverse watertig

32、ht bulkhead extending from the vessels sideto a distance inboard of 760 mm or more at the level of the summer loadline joining longitudinal watertight bulkheads may be considered as atransverse watertight bulkhead for the purpose of the damage calculations.3.2.4 If pipes, ducts or tunnels are situat

33、ed within the assumed extent ofdamage, arrangements should be made to ensure that progressive floodingcannot thereby extend to compartments other than those assumed to befloodable for each case of damage.3.2.5 If damage of a lesser extent than that specified in 3.2.2 results in amore severe conditio

34、n, such lesser extent should be assumed.3.2.6 Where a transverse watertight bulkhead is located within thetransverse extent of assumed damage and is stepped in way of a doublebottom or side tank by more than 3.05 m, the double bottom or side tanksadjacent to the stepped portion of the transverse wat

35、ertight bulkheadshould be considered as flooded simultaneously.3.2.7 If the distance between adjacent transverse watertight bulkheadsor the distance between the transverse planes passing through the neareststepped portions of the bulkheads is less than the longitudinal extent ofdamage given in 3.2.2

36、.1, only one of these bulkheads should be regarded aseffective for the purpose of 3.2.1.3.3 Damage stability criteria3.3.1 The final waterline, taking into account sinkage, heel and trim,should be below the lower edge of any opening through which progressiveflooding may take place. Such openings sho

37、uld include air pipes and thosewhich are capable of being closed by means of weathertight doors or hatchcovers and may exclude those openings closed by means of watertightmanhole covers and flush scuttles, small watertight cargo tank hatch coverswhich maintain the high integrity of the deck, remotel

38、y operatedwatertight sliding doors and sidescuttles of the non-opening type.3.3.2 In the final stage of flooding, the angle of heel due tounsymmetrical flooding should not exceed 158. This angle may beincreased up to 178 if no deck immersion occurs.3.3.3 The stability in the final stage of flooding

39、should be investigatedand may be regarded as sufficient if the righting-lever curve has, at least, arange of 208 beyond the position of equilibrium in association with amaximum residual righting lever of at least 100 mm within this range.Unprotected openings should not become immersed at an angle of

40、 heel5Guidelines for design and construction of OSVs, 2006within the prescribed minimum range of residual stability unless the spacein question has been included as a floodable space in calculations fordamage stability. Within this range, immersion of any of the openingsreferred to in 3.3.1 and any

41、other openings capable of being closedweathertight may be authorized.3.3.4 The Administration should be satisfied that the stability issufficient during intermediate stages of flooding.3.4 Assumptions for calculating damage stability3.4.1 Compliance with 3.3 should be confirmed by calculations which

42、take into consideration the design characteristics of the vessel, thearrangements, configuration and permeability of the damaged compart-ments, and the distribution, specific gravities and the free surface effect ofliquids.3.4.2 The permeability of compartments assumed to be damagedshould be as foll

43、ows:Spaces PermeabilityAppropriated to stores 60Occupied by accommodation 95Occupied by machinery 85Void spaces 95Intended for dry cargo 95The permeability of tanks should be consistent with the amount of liquidcarried, as shown in the loading conditions specified in 3.1. Thepermeability of empty ta

44、nks should be assumed to be not less than 95.3.4.3 The free surface effect should be calculated at an angle of heel of58 for each individual compartment, or the effect of free liquid in a tankshould be calculated over the range of positive residual righting arm, byassessing the shift of liquids by m

45、oment of transference calculations.3.4.4 Free surface for each type of consumable liquid should beassumed for at least one transverse pair of tanks or a single centreline tank.The tank or tanks to be taken into account should be those where theeffect of free surface is the greatest.3.4.5 Alternative

46、ly, the actual free surface effect may be used providedthe methods of calculation are acceptable to the Administration.6Guidelines for design and construction of OSVs, 20063.5 Subdivision3.5.1 The machinery spaces and other working and living spaces in thehull should be separated by watertight bulkh

47、eads.3.5.2 Arrangements made to maintain the watertight integrity ofopenings in watertight subdivisions should comply with the relevantprovisions for cargo ships contained in chapter II-1 of the Convention.3.5.3 A collision bulkhead should be fitted that complies with relevantprovisions for cargo sh

48、ips of chapter II-1 of the Convention.3.5.4 An afterpeak bulkhead should be fitted and made watertight up tothe freeboard deck. The afterpeak bulkhead may, however, be steppedbelow the freeboard deck, provided the degree of safety of the vessel asregards subdivision is not thereby diminished.4 Machi

49、nery and electrical installationsThe vessel should comply with the relevant provisions for cargo shipscontained in parts C, D and E of chapter II-1 of the Convention.5 Fire protectionThe vessel should comply with the relevant provisions for cargo shipscontained in chapter II-2 of the Convention.6 Life-saving appliancesThe vessel should comply with the relevant provisions for cargo shipscontained in chapter III of the Convention.7 RadiocommunicationsThe vessel should comply with the relevant provisions for cargo ships ofchapter IV o