BS 6364:1984 BRITISH STANDARD Incorporating Amendments Nos.1, 2 and 3 Specification for Valves for cryogenic service ICS 23.060.01 BSi NO COPYING WITHOUT BSIPERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS 6364:1984 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Mechanical Engineering Standards Committee (MEE/-) to Technical Committee MEE/191 upon which the following bodies were represented: Amalgamated Union of Engineering Workers Associated Offices Technical Committee Association of Bronze and Brass Founders Association of Hydraulic Equipment Manufacturers British Chemical Engineering Contractors Association British Compressed Gases Association British Gas Corporation British Ship Research Association British Shipbuilders British Valve Manufacturers Association Ltd. Copper Development Association Copper Tube Fittings Manufacturers' Association Council of Ironfoundry Associations Electricity Supply Industry in England and Wales Energy Industries Council Engineering Equipment and Materials Users Association Gambica (BEAMA) General Council of British Shipping Greater London Council Health and Safety Executive Institution of Chemical Engineers Institution of Gas Engineers Institution of Mechanical Engineers Institution of Water Engineers and Scientists National Coal Board Society of British Gas Industries Steel Casting Research and Trade Association Water Companies Association Coopted members Amendments issued since publication This British Standard, having been prepared under the Amd. No. Date of issue Comments direction of the Mechanical Engineering Standards Committee, was published 6591 April 1991 under the authority of the Board of BSI and comes 9431 March 1997 into effect on 29 February 1984 10115 September Indicated by a sideline in the margin BSI 05-1999 1998 ISBN 0 580 13786 4 BS 6364:1984 Contents Page Committees responsible Inside front cover Foreword i Section 1. General 1 Scope 1 2 Definitions 1 3 General requirements 1 Section 2. Design 4 Requirements 1 5 Materials 3 6 Non-destructive testing 3 7 Repair of castings 4 Section 3. Testing 8 Pressure testing 4 9 Marking 4 Appendix A Cryogenic test 5 Appendix B Preferred materials 7 Appendix C Information to be supplied by purchaser 8 Figure 1 - Valve with extended bonnet/gland 2 Figure 2 Typical arrangement of low temperature type test rig 6 Table 1 - Minimum gland extension length for cold box applications 3 Table 2 - - Austenitic steels 8 Table 3 - Non-ferrous materials 8 Publications referred to Inside back cover C BSI 05-1999 i BS 6364:1984 Foreword This British Standard has been prepared under the direction of the Mechanical Engineering Standards Committee. It is the first national standard for valves for cryogenic service but it is intended that it can only be used in conjunction with the appropriate valve product standard since the requirements and tests specified are additional to those specified in the valve product standards. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and i, pages 1 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. ii CBSI 05-1999 BS 6364:1984 Section 1. General it is intended that all equipment of the same nominal size (DN) designated by the same PN 1 Scope number shall have the same mating dimensions This British Standard specifies the requirements for appropriate to the type of end connections the permissible working pressure depends upon the design, manufacture and testing of valves for cryogenic service. It is a re