IMO 782E-1983 CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK (Incorporating Amendments 1 to 4 Second Supplement (incorporating first Supplement)).pdf

1、INTER NATIONAL MAR IT1 M E ORGAN lZATl0 N CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK 1983 Edition incorporating amendments 1 to 4 IMO CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK 1983 Edition Second Supplement (incorporating

2、 first Supplement) List of Medical First Aid Guide (MFAG) numbers for products covered by the Gas Carrier Code MFAG numbers which apply to products in chapter XIX, Summary of Minimum Requirements, of the Code are given in the table on page 2 of this Supplement for information. The numbers refer to t

3、he Medical First Aid Guide for Use in Accidents involving Dangerous Goods. Amendments to chapters Vlll and XV of this Code The Maritime Safety Committee adopted resolutions MSC.32( 63) and MSC.34(63) at its sixty-third session in May 1994. By resolution MSC.32(63) the Committee adopted changes to th

4、e International Gas Carrier Code that will have been tacitly accepted if there have been insufficient objections by 1 January 1998, and if so accepted will come into force on 1 July 1998. Changes to chapters Vlll and XV of the Gas Carrier Code were adopted by resolution MSC.34(63), but these changes

5、 will only take effect on 1 July 1998 if the changes to the International Gas Carrier Code come into force. The text of these changes to chapters Vlll and XV begins on page 3 of this Supplement. Copyright 0 IMO 1996 (Sales number: IMO-782E) Printed in the United Kingdom by IMO SUPPLEMENT TO CHAPTER

6、XIX - SUMMARY OF MINIMUM REQUIREMENTS The MFAG numbers shown below apply to products in the table of minimum requirements as amended by the amendments adopted by MSC 40 (May 1979). and they are provided for information on the emergency procedures to be applied in the event of an incident with the pr

7、oducts covered by the Gas Carrier Code. Where any of the products listed are carried at low temperatures from which frostbite may occur, MFAG No. 620 is also applicable. a Product name a Product name Acetaldehyde 1089 Isopropylamine Ammonia, anhydrous 1005 725 Methane (LNG) 1972 620 1010 310 310 - M

8、ethylacetylene- propadiene mixture 1060 310 Butadiene Butane 101 1 Methyl bromide 1062 345 Butane/propane mixtures 101 1, 1978 310 310 - Methvl chloride 1063 1036 - 340 Butylenes 1012 Monoethylamine 320 Chlorine 1017 740 Nitrogen 204C 620 1155 1032 _ 330 320 Prooane 1978 310 Diethyl ether Dimethylam

9、ine - Propylene 1077 310 Ethane 1961 310 Propylene oxide 365 128C - 1037 1038 - 340 310 _. Refrigerant gases (see notes) 350 Ethyl chloride Ethylene 1079 1086 1302 - _ 635 340 Sulphur dioxide Vinyl chloride Ethylene oxide 1040 365 _ 365 Ethylene oxide/ propylene oxide mixture (max. 30% w/w ethylene

10、oxide) Vinyl ethyl ether 330 2983 1218 Vinvlidene chloride 1302 340 * These products are also covered bv the IBC Code Isoprene 310 To reference the table, the following footnote may be inserted at the bottom of page 107 of the Gas Carrier Code with an asterisk reference to paragraph 14.9: * Referenc

11、e IS made to the Medical First Aid Guide for Use in Accidents involving Dangerous Goods (MFAG). which includes the MFAG numbers of products covered by the Code and the emergency procedures to be applied in the event of an incident MFAG numbers related to products covered by the Gas Carrier Code are

12、given in a supplement to this Code 2 AMENDMENTS ADOPTED BY RESOLUTION MSC.34(63) IN MAY 1994 1 Existing chapter XV is replaced by the following: “CHAPTER XV - FILLING LIMITS FOR CARGO TANKS 15.1 General 15.1.1 the reference temperature, except as permitted by 1 5.1.3. No cargo tanks should have a hi

13、gher filling limit (FL) than 98% at 15.1.2 The maximum loading limit (LL) to which a cargo tank may be loaded should be determined by the following formula: LL = FL? where: LL = loading limit expressed in percent, which means the maximum allowable liquid valume relative to the tank volume to which t

14、he tank may be loaded: FL = filling limit as specified in 1 5.1.1 or 1 5.1.3: r = relative density of cargo at the reference temperature: and rL = relative densin/ of cargo at the loading temperature and pressure. 1 5.1.3 The Administration may allow a higher filling limit (FL) than the limit of 98%

15、 specified in 1 5.1.1 at the reference temperature, taking into account the shape of the tank, arrangements of pressure relief valves, accuracy of level and temperature gauging and the difference between the loading temperature and the temperature corresponding to the vapour pressure of the cargo at

16、 the set pressure of the pressure relief valves, provided the conditions specified in 8.2.1 7 are maintained. 15.1.4 means: For the purposes of this chapter only, “reference temperature“ (a) the temperature corresponding to the vapour pressure of the cargo at the set pressure of the pressure relief

17、valves when no cargo vapour pressure/temperature control as referred to in chapter VI1 is provided: (b) the temperature of the cargo upon termination of loading, during transport, or at unloading, whichever is the greatest, when a cargo vapour pressure/temperature control as referred to in chapter V

18、I1 is provided. If this reference temperature would result in the cargo tank becoming liquid-full before the cargo reaches a temperature corresponding to the vapour pressure of the cargo at the set pressure of the relief valves required in 8.2. an additional pressurerelieving system complying with 8

19、.3 should be fitted. 3 15.1.5 The Administration may allow type C tanks to be loaded according to the following formula provided that the tank vent system has been approved in accordance with 8.2.1 8: LL = FLF LL = loading limit as specified in 15.1.2: FL = filling limit as specified in 15.1 .I or 1

20、5.1.3; fR = relative density of cargo at the highest temperature which the cargo may reach upon termination of loading, during transport, or at unloading, under the ambient design temperature conditions described in 7.1.2: and where: rL = as specified in 15.1.2. This paragraph does not apply to prod

21、ucts requiring a type 1G ship 15.2 Information to be provided to the master The maximum allowable loading limits for each cargo tank should be indicated for each product which may be carried, for each loading temperature which may be applied and for the applicable maximum reference temperature, on a

22、 list to be approved by the Administration. Pressures at which the pressure relief valves, including those valves required by 8.3, have been set should also be stated on the list. A copy of the list should be permanently kept on board by the master. 15.3 Chapter XV applies to all ships regardless of

23、 the date of construction.” The following words are added at the end of existing paragraph 8.2.17: 2 “at the maximum allowable filling limit (FL)”. 3 The following new paragraphs 8.2.18 and 8.2.19 are added after existing paragraph 8.2.17: ”8.2.18 The adequacy of the vent system fitted on tanks load

24、ed in accordance with 15.1.5 is to be demonstrated using the guidelines developed by the Organization. A relevant certificate should be permanently kept on board the ship. For the purposes of this paragraph, ”vent system” means: (a) the tank outlet and the piping to the pressure relief valve; (b) th

25、e pressure relief valve: (c) the piping from the pressure relief valve to the location of discharge to the atmosphere and including any interconnections and piping which joins other tanks. Paragraphs 8.2.17 and 8.2.18 apply, where applicable, to all ships 8.2.1 9 regardless of the date of constructi

26、on.” * Refer to the guidelines to be developed by the Organization 4 CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK 1983 Edition incorporating amendments 1 to 4 IMO London, 1983 First published in 1983 by the INTERNATIONAL MARITIME ORGANIZATION 4 Albert Embankment,

27、 London SE1 7SR Printed by the International Maritime Organization, London 14 16 18 20 19 17 15 ISBN 92-801-1 165-5 IMO PUBLICATION Sales number: IMO-782E NOTE Amendments approved by the Maritime Safety Committee at its thirtyeighth, fortieth, forty-second and fortyeighth sessions in 1978, 1979, 198

28、0 and 1983 have been incorporated in this edition of the Code. Throughout the Code amendments are indicated by reference numbers in the text which have the following meaning: 1) First set of amendments adopted 19 April 1978 2) Second set of amendments adopted 8 May 1979 3) Third set of amendments ad

29、opted 20 May 1980 4) Fourth set of amendments adopted 14 June 1983 At the time of publication, all of the amendments incorporated are applicable to new ships. The amendments also apply to existing ships except where they have been annotated “E-NA meaning that the amendment is not applicable to exist

30、ing ships. Copyright 0 IMO 1983 CONTENTS 1 CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK Preamble . CHAPTER I . GENERAL . 1 . 1 Purpose . 1.2 Application 1.3 Hazards . 1.4 Definitions 1.5 Equivalents 1.6 Survey requirements4 1.7 Review of the Code . . . CHAPTER II

31、 . SHIP SURVIVAL CAPABILITY AND CARGO TANK LOCATION . 2.1 General . 2.2 Freeboard and stability 2.4 Survival requirements 2.6 Location of cargo tanks 2.7 2.3 Damage and flooding assumptions 2.5 Standard of damage to be applied Special consideration for small ships CHAPTER Ill -SHIP ARRANGEMENTS . 3.

32、1 Segregation of the cargo area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Accommodation. service and control station spaces . 3.3 Cargo pump rooms and cargo compressor rooms . 3.4 Cargo control rooms 3.5 Access to spaces in the cargo area . 3.6 Air-locks .

33、 3.7 Bilge. ballast and fuel oil arrangements 3.8 Bow or stern loading and discharge arrangements . CHAPTER IV - CARGO CONTAINMENT 4.1 General 4.2 Definitions . 4.3 Design loads . 4.4 Structural analysis 4.5 Allowable stresses and corrosion allowance Page 7 7 9 9 9 10 10 13 13 15 17 17 17 18 19 20 2

34、1 21 23 23 24 25 25 26 27 28 28 29 29 29 32 34 40 9 J I Contents 4.6 Supports 4.7 Secondary barrier . 4.8 Insulation 4.9 Materials 4.10 Construction and testing 4.1 1 Stress relieving for independent tanks type C . 4.1 2 Guidance formulae for acceleration components 4.1 3 Stress categories . CHAPTER

35、 V - PROCESS PRESSURE VESSELS AND LIQUID. VAPOUR. AND PRESSURE PIPING SYSTEMS . 5.1 General . 5.2 Cargo and process piping 5.3 Cargo system valving requirements 5.4 Ships cargo hoses . 5.5 Cargo transfer methods CHAPTER VI - MATERIALS OF CONSTRUCTION . 6.1 General . 6.2 Material requirements 6.3 Wel

36、ding and non-destructive testing . . . . . . . . . . . . . . . . . . . . CHAPTER VI1 . CARGO PRESSURE/TEMPERATURE CONTROL . 7.1 General . 7.2 Refrigeration systems CHAPTER Vlll -CARGO VENTSYSTEMS 8.1 General . 8.2 Pressure relief systems 8.3 Additional pressure relieving system 8.4 Vacuum protection

37、 systems . 8.5 Size of valves CHAPTER IX . ENVIRONMENTAL CONTROL FOR CARGO CONTAINMENT SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1 9.2 Environmental control within cargo tanks and cargo Environmental control within the hold spaces (cargo containment systems other than indepen

38、dent tanks Environmental control of spaces surrounding piping systems . type C) independent tanks type C . 9.3 42 43 45 46 48 52 52 53 58 58 58 65 66 66 67 67 68 75 80 80 80 82 82 82 84 84 85 88 88 88 89 4 Contents I 9.4 lnerting 89 9.5 Inert gas production on board 89 CHAPTER X - ELECTRICAL ARRANGE

39、MENTS 91 10.1 General 91 10.2 Types of equipment 91 1 1.1 Fire safety requirements . 94 11.2 Fire water main equipment 94 11.3 Water spray system 95 11.4 Dry chemical powder fire extinguishing systems . 96 CHAPTER XI - FIRE PROTECTION AND FIRE EXTINGUISHING 94 11.5 Gas-dangerous enclosed spaces 97 1

40、1.6 Firemens outfits4 98 CHAPTER XI1 . MECHANICAL VENTILATION IN CARGO AREA 99 12.1 Spaces required to be entered during normal cargo handling operations 99 12.2 Spaces not normally entered 100 CHAPTER Xlll . INSTRUMENTATION (GAUGING. GAS DETECTION) . 101 13.1 General 101 13.2 Level indicators for c

41、argo tanks 101 13.3 Liquid level alarms 102 13.4 Pressure gauges 102 13.5 Temperature indicating devices 103 13.6 Gas detection requirements 103 CHAPTER XIV - PERSONNEL PROTECTION . 106 CHAPTER XV . FILLING LIMITS FOR CARGO TANKS . 108 15.1 General 108 15.2 Information to be provided to the master 1

42、08 CHAPTER XVI . USE OF CARGO AS FUEL . 109 CHAPTER XVII -SPECIAL REQUIREMENTS . 111 17.1 General 111 17.2 Personnel protection 111 17.3 Materials of construction . 111 17.5 Refrigeration systems . 112 17.6 Deck cargo piping 112 17.4 Independent tanks2 . 112 5 Contents 17.7 Bow or stern loading and

43、discharge lines . 17.8 Exclusion of air from vapour spaces 17.9 Moisture control . 17.10 Inhibition 17.1 1 Permanently installed toxic gas detectors . 17.12 Special requirements for individual gases . 17.1 3 Vapour return connexions21 . 17.14 Toxic products2 . 17.1 5 Flame screens on vent outlets2 .

44、 17.16 Maximum allowable quantity of cargo per tank2 17.1 7 Submerged electric cargo pumps4 CHAPTER XVlll - OPERATING REQUIREMENTS . 18.1 Information required to be carried 18.2 Compatibility 18.3 Personnel training . 18.4 Entry into spaces . 18.5 Carriage of cargo at low temperature 18.6 Protective

45、 clothing . 18.7 Systems and controls 18.8 Cargo transfer operations . . . . . . . . . . . . . . . . . . . . 113 113 113 113 113 114 122 122 123 123 123 124 124 124 124 125 125 125 126 126 18.9 Additional operating requirements . 126 CHAPTER XIX -SUMMARY OF MINIMUM REQUIREMENTS 127 CARRIAGE OF LIQUE

46、FIED GASES IN BULK . 129 APPENDIX - MODEL FORM OF CERTIFICATE OF FITNESS FOR THE 2 RESOLUTION A.328(IXl- CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK . 133 3 RESOLUTION MSC.7(48) . RECOMMENDATION FOR CHEMICAL TANKERS AND GAS CARRIERS CONSTRUCTED BEFORE 1 JULY 198

47、6 . 134 4 GUIDELINES FOR THE UNIFORM APPLICATION OF THE SURVIVAL REQUIREMENTS OF THE BULK CHEMICAL CODE AND THE GAS CARRIER CODE . 136 5 TESTING OF SHORE INSTALLATION CARGO HOSES . MSClClRC.220 . 141 6 I 1 I CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING LIQUEFIED GASES IN BULK PREAMBLE 1

48、 The Code has been developed to provide an international standard for the safe carriage by sea in bulk of liquefied gases and certain other substances listed in Chapter XIX, by prescribing the design and constructional features of ships involved in such carriage and the equipment they should carry s

49、o as to minimize the risk to the ship, its crew and to the environment having regard to the nature of the products involved. 2 The basic philosophy is one of ship types related to the hazards of the products covered by the Code. Each of the products may have one or more hazard properties which include flammability, toxicity, corrosivity and reactivity. A further possible hazard may arise due to the products being transported under cryogenic or pressure conditions. 3 Throughout the development of the Code it was recognized that it must be based upon sound naval ar