IMO I104E-1993 IGC Code International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (Includes Supplement).pdf

1、 International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code) 1993 Edition Supplement The following umendments were adopted by resolution MSC.32(63) on 23 Muy 1994 und entered into force on 1 July 1998: Amendments related to application 1 Existing paragr

2、aphs 1.1.2 and 1.1.3 are replaced by the following: Unless expressly provided otherwise, the Code applies to ships the keels of which are laid or which are at a stage at which: construction identifiable with the ship begins; and assembly of that ship has commenced cornpricing at least 50 tonnes or 1

3、% of the estimated mass of all structural material, whichever is the less; on or after 1 July 1998. Ships constructed before 1 July 1998 are to comply with resolution MSC.5(48) adopted on 17 June 1983 subject to amendments by resolution MSC.30(61) adopted on 11 December 1992. 1.1.3 A ship, irrespect

4、ive of the date of construction, which is converted to a gas carrier on or after 1 July 1998 should be treated as a gas carrier constructed on the date on which such conversion commences.? ?1.1.2 .1 .2 Printed in the United Kingdom by IMO Copyright 0 IMO 2003 (IA104E) Amendments related to filling l

5、imits 2 Existing chapter 15 is replaced by the following: “Chapter 15 Filling limits for carg 15.1 General 15.1.1 No cargo tanks should have a 98% at the reference temperature, 15.1.3. tanks iigher filling limit (Fi) than except as permitted by 15.1.2 The maximum loading limit (LL) to which a cargo

6、tank may be loaded should be determined by the following formula: LL = FLE where: Li = loading limit expressed in percent, which means the maximum allowable liquid volume relative to the tank volume to which the tank may be loaded; FL = filling limit as specified in 15.1 .I or 15.1.3; PR = relative

7、density of cargo at the reference tempera- ture; and pL = relative density of cargo at the loading temperature and pressure. 15.1.3 The Administration may allow a higher filling limit (FL) than the limit of 98% specified in 15.1 .I at the reference tempe- rature, taking into account the shape of the

8、 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 the set pressure of the pressure relief valves, provided the conditions specified in 8.

9、2.1 7 are maintained. 15.1.4 For the purposes of this chapter only, reference temperature means: the temperature corresponding to the vapour pressure of the cargo at the set pressure of the pressure relief valves when no cargo vapour pressure/temperature control as referred to in chapter 7 is provid

10、ed; the temperature of the cargo upon termination of loading, during transport, or at unloading, whichever is the greatest, when a cargo vapour pressure/tempera- ture control as referred to in chapter 7 is provided. If .I .2 2 this reference temperature would result in the cargo tank becoming liquid

11、-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 pressure-relieving system complying with 8.3 should be fitted. 15.1.5 The Administration may allow type C tanks to be loaded accordin

12、g to the following formula provided that the tank vent system has been approved in accordance with 8.2.1 8: LL = FL PL where: iL = loading limit as specified in 15.1.2; FL = filling limit as specified in 15.1.1 or 15.1.3; PR = relative density of cargo at the highest temperature which the cargo may

13、reach upon termination of loading, during transport, or at unloading, under the ambient design temperature conditions described in 7.1.2; and p = as specified in 15.1.2. This paragraph does not apply to products requiring a type 1G ship. 15.2 The maximum allowable loading limits for each cargo tank

14、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 list to be approved by the Administration. Pressures at which the pressure relief valves, including those valves required by 8.3, ha

15、ve 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 15 applies to all ships regardless of the date of construction.” Information to be provided to the master 3 The following words are added at the end of existing paragraph

16、 8.2.17: “at the maximum allowable filling limit (Fi)”. 4 The following new paragraph 8.2.18 is added after existing paragraph 8.2.17: “8.2.18 The adequacy of the vent system fitted on tanks loaded in accordance with 15.1.5 is to be demonstrated using the 3 guidelines developed by the Organization.*

17、 A relevant certifi- cate should be permanently kept on board the ship. For the purposes of this paragraph, vent system means: the tank outlet and the piping to the pressure relief valve; the piping from the pressure relief valve to the location of discharge to the atmosphere and including any inter

18、connections and piping which joins other tanks. This paragraph may apply to all ships regardless of the date of construction.” * Refer to the guidelines to be developed by the Organization. .I .2 the pressure relief valve; .3 Amendments related to cargo tank vent systems Existing paragraph 8.2.3 is

19、replaced by the following: In general, the setting of the pressure relief valves should not be higher than the vapour pressure which has been used in the design of the tank. However, where two or more pressure relief valves are fitted, valves comprising not more than 50% of the total relieving capac

20、ity may be set at a pressure up to 5% above MAWS.” The following sentences are added to existing paragraph 8.2.4: “Valves should be constructed of materials with a melting point above 925C. Consideration of lower melting point materials for internal parts and seals should be given if their use provi

21、des significant improvement to the general operation of the valve.” Existing paragraph 8.2.9 is replaced by the following: Each pressure relief valve installed on a cargo tank should be connected to a venting system which should be so constructed that the discharge of gas will be unimpeded and direc

22、ted vertically upwards at the exit and so arranged as to minimize the possibility of water or snow entering the vent system. The height of vent exits should not be less than B/3 or 6 m, whichever is the greater, above the weather deck and 6 m above the working area, the fore-and-aft gangway, deck st

23、orage tanks and cargo liquid lines.” The following sentences are added to existing paragraph 8.2.16: “The pressure drop in the vent line from the tank to the pressure relief valve inlet should not exceed 3% of the valve set pressure. For unbalanced pressure relief valves the back pressure in the dis

24、charge line should not exceed 10% of the gauge pressure at the relief valve inlet with the vent lines under fire exposure as referred to in 8.5.2.” “8.2.3 “8.2.9 4 The following amendments were adopted by resolution MSC.59(67) on 5 December 1996 and entered into force on 1 July 1998: Chapter I - Gen

25、eral 1 The following new paragraph 1.3.30.3 is added after existing paragraph 1.3.30.2: “1.3.30.3 Recognized standards are applicable international or national standards acceptable to the Administration or standards laid down and maintained by an organization which complies with the standards adopte

26、d by the Organization* and which is recognized by the Administration.” * Refer to the Minimum Standards for recognized organizations acting on behalf of the Administration, set out in appendix 1 to the Guidelines for the authorization of organizations acting on behalf of the Administration, adopted

27、by the Organization by resolution A.739( 18). Chapter 2 - Ship survival capability and location of cargo tanks 2 In paragraph 2.3.3, the words “should be of a type acceptable to the Administration and” are deleted and the words “and should comply with recognized standards” are added at the end of th

28、e paragraph. Chapter 3 - Ship arrangements 3 In paragraph 3.8.1, the words “to the approval of the Administration and” are deleted. Chapter 4 - Cargo containment 4 In paragraph 4.2.4.2, in the first sentence, the words “Recognized Standards*” are replaced by the words “recognized standards”, In para

29、graph 4.2.4.3, in the second sentence, the words “(gravity tests)” are replaced by the words “(gravity tanks)”. In paragraph 4.2.4.4, the expression “55 N/mm2 for ferritic/ martensitic steel” is replaced by the expression “55 N/mm2 for ferritic-perlitic, martensitic and austenitic steels”. In the in

30、troductory phrase of paragraph 4.1 1.2, the words “with the approval of the Administration” are deleted. 5 6 7 5 Chapter 5 - Process pressure vessels and liquid, vapour and pressure piping systems 8 In paragraph 5.2.2.1, in the definition of the efficiency factor e, the existing text of the last sen

31、tence is replaced by the following: “In other cases an efficiency factor of less than 1 .O, in accordance with recognized standards, may be required depending on the manufacturing process.” In paragraph 5.2.4.4, in the first sentence, the words “be to a standard acceptable to the Administration” are

32、 replaced by the words “comply with recognized standards and at the end of the second sentence, the words “by the Administration” are deleted. 10 In paragraph 5.4.1, the existing text of the second sentence is replaced by the following: “Relaxations from these requirements may be accepted, in accord

33、ance with recognized standards, for piping inside cargo 9 11 12 13 14 tanks and open-ended- piping.” In paragraph 5.4.2.2, the words “satisfactory to the Administra- tion” are replaced by the words “in accordance with recognized standards”. In paragraph 5.4.2.3, the words “acceptable to the Administ

34、ra- tion” are replaced by the words “complying with recognized standards”. In paragraph 5.4.3.2, in the first sentence, the words “standards acceptable to the Administration” are replaced by the words “recognized standards”. In paragraph 5.6.4, in the sixth sentence, the words “with 30 s of actuatio

35、n” are replaced by the words “within 30 s of actuation”. Chapter 8 - Cargo tank vent systems 15 In paragraph 8.2.2, the words “to the satisfaction of the Adminis- tration” are replaced by the words “complying with recognized standards”. Chapter II - Fire protection and fire extinction 16 In paragrap

36、h 11.2.4, in the second sentence, the words “All pipes, valves nozzles” are replaced by the words “All pipes, valves, nozzles”. 6 Chapter 13 - Instrumentation (gauging, gas detection) 17 In paragraph 13.3.1, in the last sentence, the word “Administra- tion” is deleted and the words “port Administrat

37、ion” are replaced by the words “port State authority”. 18 In paragraph 13.6.9, the expression “column h” is replaced by the expression “column i“. Chapter 14 - Personnel protection 19 In paragraph 14.4.1, the expression “column h” is replaced by the expression “column i”. Chapter 16 - Use of cargo a

38、s fuel 20 In paragraph 16.5.6, in the second sentence, the words “and these arrangements should be to the satisfaction of the Administra- tion” are deleted. Chapter 17 - Special requirements 21 In paragraph 17.20.3.1, in the first sentence, the words “or other material acceptable to the Administrati

39、on” are replaced by the words “in accordance with recognized standards” and the second sentence is deleted. 22 In paragraph 17.20.14, in the first sentence, the words “filling limits” are replaced by the words “loading limits”. Chapter 19 - Summary of minimum requirements 23 In columnfof the table,

40、for the product Butadiene, the entry “F” is replaced by the entry “F + T”. 7 These amendments, relating to the Harmonized System of Survey and Certification, were adopted by the Maritime Safety Committee on 24 May 1990 by resolution MSC.17(58) and entered into force on 3 February 2000. 1.3 Definitio

41、ns A new definition should be added as follows: “1.3.3.3 Anniversary date means the day and the month of each year which will correspond to the date of expiry of the International Certificate of Fitness for the Carriage of Liquefied Gases in Bulk.” 1.5 Surveys and certification The existing text of

42、section 1.5 should be replaced by the following: “1.5.1 Survey procedure 1.5.1.1 The survey of ships, so far as regards the enforcement of the provisions of the regulations and granting of exemptions therefrom, should be carried out by officers of the Administra- tion. The Administration may, howeve

43、r, entrust the surveys either to surveyors nominated for the purpose or to organiza- tions recognized by it. 1.5.1.2 The Administration nominating surveyors or recognizing organizations to conduct surveys should, as a minimum, empower any nominated surveyor or recognized organization to: .1 .2 carry

44、 out surveys if requested by the appropriate The Administration should notify the Organization of the specific responsibilities of the nominated surveyors or recognized organizations and of the conditions of the authority delegated to them for circulation to the Contracting Governments. 1.5.1.3 When

45、 a nominated surveyor or recognized organization determines that the condition of the ship or its equipment does not correspond substantially with the particulars of the Interna- tional Certificate of Fitness for the Carriage of Liquefied Gases in Bulk, or is such that the ship is not fit to proceed

46、 to sea without danger to the ship or persons on board, or without presenting unreasonable threat of harm to the marine environment, such surveyor or organization should immediately ensure that corrective action is taken and should, in due course, notify the Administration. if such corrective action

47、 is not taken, the Certificate should be withdrawn and the Administration should require repairs to a ship; and authorities of a port State. 9 be notified immediately; and, if the ship is in a port of another Contracting Government, the appropriate authorities of the port State should also be notifi

48、ed immediately. When an officer of the Administration, a nominated surveyor or a recognized organiza- tion has notified the appropriate authorities of the port State, the Government of the port State concerned should give such officer, surveyor or organization any necessary assistance to carry out t

49、heir obligations under this paragraph. When applic- able, the Government of the port State concerned should take such steps as will ensure that the ship does not sail until it can proceed to sea or leave the port for the purpose of proceeding to the nearest appropriate repair yard available without danger to the ship or persons on board or without presenting an unreasonable threat of harm to the marine environment. 1.5.1.4 In every case, the Administration should guarantee the completeness and efficiency of the survey, and should undertake to ensure