IMO 808E-1997 Code of Safety for Diving Systems 1995.pdf

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1、 Code of Safety for Divi ng Svstems 1995 International Maritime Organization London, 1997 / Published in 1997 by the INTERNATIONAL MARITIME ORGANIZATION 4 Albert Embankment, London SE1 7SR Printed by the lnternational Maritime Organization, London 2 4 6 8 10 9 7 5 3 1 ISBN 92-801-1432-8 IMO PUBLICAT

2、ION I Sales number: IMO-808E I Copyright 0 IMO 1997 All rights reserved. No part of this publication may, for sales purposes, be produced, stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, magnetic tape, mechanical, photocopying or otherwise, without

3、 prior permission in writing from the lnternational Maritime Organization. Foreword The Code of Safety for Diving Systems was originally adopted by the IMO Assembly at its thirteenth session (November 1983). Recognizing the need to update the Code and take into account amendments adopted by the Mari

4、time Safety Committee since its adoption, the Assembly adopted a revised version, the Code of Safety for Diving Systems, 1995, at its nineteenth session (November 1995) by resolution A.831(19). . 111 Con tents PREAMBLE 1 CHAPTER 1 . GENERAL 1.1 Purpose 2 1.3 Definitions 2 1.4 Exemptions . 4 1.5 Equi

5、valents 4 1.6 Surveys and certification . 4 1.2 Application . 2 1.7 Control 6 CHAPTER 2 . DESIGN. CONSTRUCTION AND SURVEY 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 General 7 Surface compression chambers . 7 Diving bells 8 Other pressure vessels not intended for human occupancy 9 Pipes, valves, fittings an

6、d hoses . 9 Breathing gas supply, storage and temperature Handling system for diving bells 12 Interface between diving system and the ship or floating structure . 12 Fire prevention, detection and extinction . 13 control . 10 2.10 Electrical system . 14 2.1 1 Control system . 14 2.12 Communications

7、and relocation system . 15 CHAPTER 3 . EVACUATION SYSTEM . 18 APPENDIX . MODEL FORM OF DIVING SYSTEM SAFETY CERTIFICATE 19 Resolution A.831(19) 23 I V Previous page . is blank Code of Safety for Diving Systems, 1995 PREAMBLE l This Code* has been developed to provide a minimum interna- tional standa

8、rd for the design, construction and survey of diving systems on ships and floating structures engaged in diving operations, in order to en- hance safety of divers/personnel. The Code accepts that interchangeability of equipment or the addition or deletion of components is reasonable and common pract

9、ice and that this Code should not inhibit this. 2 ment and operation of diving systems. 3 Throughout the development of the Code, it was recognized that it must be based upon sound design and engineering principles and experi- ence gained from operating such systems; furthermore, that design tech- n

10、ology of diving systems is complex and that the Code should be re evaluated and revised as necessary. To this end the Organization will periodically review the Code, taking into account both experience and the latest technical developments. The intent of the Code is also to facilitate the internatio

11、nal move- 4 Any existing diving system which complies with the provisions of the Code should be considered eligible for issuance of a certificate in accordance with this Code. 5 The Code is not intended to prohibit the use of an existing system simply because its design, construction and equipment d

12、oes not conform to the requirements of this Code. Many existing diving systems have op erated successfully and safely for extended periods of time and their op erating history should be considered in evaluating their suitability. 6 the procedures for control of diving operations. The Code does not i

13、nclude requirements for diving operations or 7 The Code has been developed for fixed diving systems. However, any temporary diving systems which comply with the provisions of the Code may be certificated In accordance with the Code. * The Code of Safety for Diving Systems, 1995, comprises the annex

14、to resolution A.83 1 (1 9), the text of which is reproduced at the end of this publication. 1 Chapter 1 General 1.1 Purpose The purpose of this Code is to recommend design criteria and construc- tion, equipment and survey standards for diving systems so as to minimize the risk to divers, personnel,

15、ships and floating structures having such systems on board and to facilitate the international movement of such ships and floating structures in the context of diving operations. 1.2 Application The Code applies to new fixed diving systems which are certificated more than 12 months after the date on

16、 which the Assembly of the Organization adopts this Code. However, any existing system which complies with the provisions of the Code should be considered eligible for issuance of a certificate in accordance with this Code. 1.3 Definitions For the purpose of this Code the terms used have the meaning

17、s defined in the following paragraphs unless expressly provided otherwise. 1.3.1 Administration means the Government of the State whose flag a ship or floating structure which carries a diving system is entitled to fly or in which the ship or floating structure is registered. 1.3.2 gases under press

18、ure. I 1.3.3 which are used for breathing during diving operations. 1.3.4 1.3.5 occupancy with means of controlling the pressure inside the chamber. 1.3.6 Depth means the water depth or equivalent pressure to which the diver is exposed at any time during a dive or inside a surface compression chambe

19、r or a diving bell. Bottle means a pressure container for the storage and transport of Breathing gas/breathing mixture means all gases/mixtures of gases Certificate means Diving System Safety Certificate. Surface compression chamber means a pressure vessel for human 1.3.7 Diving bell means a submers

20、ible compression chamber, including its fitted equipment, for transfer of diving personnel under pressure be- tween the work location and the surface compression chamber. L General 1.3.8 the conduct of diving operations. 1.3.8.1 Fixed system means a diving system installed permanently on ships or fl

21、oating structures. 1.3.8.2 Temporary system means a diving system installed on ships or floating structures for a period not exceeding one year. 1.3.9 Evacuation system means a system whereby divers under pressure can be safely evacuated from a ship or floating structure to a position where decompre

22、ssion can be carried out. 1.3.10 Handling system means the plant and equipment necessary for raising, lowering and transporting the diving bell between the work location and the surface compression chamber. 1.3.1 1 Hazardous areas are those locations in which an explosive gas-air mixture is continuo

23、usly present, or present for long periods (zone 0); in which an explosive gas-air mixture is likely to occur in normal operation (zone 1); in which an explosive gas-air mixture is not likely to occur, and if it does it will only exist for a short time (zone 2). 1.3.12 Life support system means the g

24、as supply, breathing gas system, decompression equipment, environmental control system and equipment required to provide a safe environment for the diving crew in the diving bell and the surface compression chamber under all ranges of pressure and conditions they may be exposed to during diving oper

25、ations. 1.3.13 Living compartment means the part of the surface compression chamber which is intended to be used as the main habitation for the divers during diving operations and which is equipped for such purpose. 1.3.14 Main components of a diving system include the surface compression chamber, d

26、iving bell, handling system and fixed gas storage facilities. Diving system means the whole plant and equipment necessary for 1.3.1 5 Mating device means the equipment necessary for the connection and disconnection of a diving bell to a surface compression chamber. 1.3.16 Maximum operating depth of

27、the diving system is the depth, in metres or feet, of seawater equivalent to the maximum pressure for which the diving system is designed to operate. 1.3.1 7 Organization means the International Maritime Organization (IMO). 1.3.18 Pressure vessel means a container capable of withstanding an in- tern

28、al maximum working pressure greater than or equal to 1 bar. / 3 Chapter 1 1.3.19 Umbilical means the link between the diving support unit and the diving bell and may contain surveillance, communication and power supply cables, breathing gas and hot water hoses. The hoisting and lowering strength mem

29、ber may be part of the umbilical. 1.3.20 Category A machinery spaces are those spaces and trunks to such spaces as defined in the International Convention for the Safety of Life at Sea, 1974, as amended. 1.4 Exemptions An Administration may exempt any system which embodies features of a novel kind f

30、rom any of the provisions of the Code, so that the research and development into such novel features is not restricted by the Code. Any such system should, however, comply with safety requirements which, in the opinion of that Administration, are adequate for the operation intended and are such as t

31、o ensure the overall safety of the system. The Adminis- tration allowing any such exemptions should list the exemptions on the Certificate. 1.5 Equivalents Where the Code requires that a particular fitting, material, appliance, ap paratus, item or type of equipment should be fitted or carried in a s

32、ystem, or that any particular provision should be made, or any procedure or arrangement complied with, the Administration may allow alternative ar- rangements in that system, provided that the Administration is satisfied that such alternatives are at least as effective as the requirements of the Cod

33、e. 1.6 Surveys and certification 1.6.1 low: Each diving system should be subject to the surveys specified be- .1 An initial survey before any fixed system is put into service or before the Certificate required under this section of the Code is issued for the first time, which should include a comple

34、te and thorough examination of the diving system, equipment, fittings, arrangements and material and which should be such as to ensure their full compliance with the applicable provi- sions of the Code. A renewal survey at intervals specified by the Administration, but not exceeding five years, whic

35、h should be a complete and thorough examination to ensure that the diving system, equipment, fittings, arrangements and material fully comply with the applicable provisions of the Code. .2 4 General .3 An annual survey within three months before or after each anniversary date of the Diving System Sa

36、fety Certificate so as to ensure that the diving system, fittings, arrangements, safety equipment and other equipment remain in compliance with the applicable provisions of the Code and are in good working order. Such annual survey should be endorsed on the Certifi- cate issued under the provisions

37、of this section. 1.6.2 An inspection, either general or partial according to the circum- stances, should be made every time a defect is discovered or an accident occurs which affects the safety and certification of the diving system or whenever a significant repair or alteration is made. The inspect

38、ion should be such as to ensure that the repairs or alterations carried out have been done effectively and are in all respects in full compliance with the applic- able provisions of the Code. 1.6.3 Surveys and inspections should be carried out by officers of the Administration. The Administration ma

39、y, however, entrust the surveys either to surveyors nominated for the purpose or to organizations recognized by it. In every case the Administration concerned should fully guarantee the completeness and efficiency of the surveys. 1.6.4 After any survey or inspection under this section has been com-

40、pleted no significant change should be made in the diving system without the agreement of the Administration or any person or organization duly authorized by it, except the replacement of equipment and fittings for the purpose of repair or maintenance. 1.6.5 A Certificate should be issued either by

41、the Administration or any person or organization duly authorized by it after survey or inspection to a diving system which complies with the requirements of the Code. In every case the Administration should assume full responsibility for the Certificate. 1.6.6 The Certificate should be drawn up in t

42、he official language of the Administration in the form corresponding to the model given in the ap- pendix to the Code. If the language used is neither English nor French, the text should include a translation into one of these languages. 1.6.7 Any exemptions granted under 1.4 should be clearly noted

43、 on the Certificate. 1.6.8 Administration, and should not exceed five years from the date of issue. A Certificate should be issued for a period specified by the 1.6.9 An extension of the validity of the Certificate may be granted for a maximum period of five months at the discretion of the Administr

44、ation, subject to an annual survey being carried out. Chapter 1 1.6.10 A Certificate would cease to be valid if significant alterations have been made to the diving system without the agreement of the Adminis- tration or any person or organization authorized by it, except for the replacement of such

45、 equipment or fittings for the purpose of repair or maintenance, or if surveys and inspections as specified by the Adminis- tration under the provisions of 1.6.1 have not been carried out. 1.6.1 1 Each main component of the diving system should be stamped with an official number or other distinctive

46、 identification which should be given on the Certificate. 1.6.1 2 Limiting operating parameters, including vessels motion and en- vironmental conditions, should be shown in the Certificate. 1.7 Control 1.7.1 Every diving system, issued with a Certificate under section 1.6, is subject, whilst under t

47、he control of an Administration other than that which has issued the Certificate, to control by officers duly authorized by that Administration for verification that the Certificate is valid. Such Certificate should be accepted unless there are clear grounds for believing that the condition of the d

48、iving system or its equipment does not correspond substantially with the particulars of that Certificate. In that case, the officer carrying out the control may take such steps as will allow the system to operate on a temporary basis without undue risk to the divers and the personnel on board. In th

49、e event of this control giving rise to intervention of any kind, the officer carrying out the control should inform the Adminis- tration or the Consul or, in his absence, the nearest diplomatic repre- sentative of the State in which the ship or floating structure is registered, in writing forthwith of all circumstances on the basis of which intervention was deemed to be necessary. 1.7.2 Nothwithstanding 1.7.1, the provisions of 1.6 are without prejudice to any rights of the coastal State under international law to impose its own requirements relatin