BS 6755-1-1986 阀门试验.第1部分:产品压力试验要求规范.pdf
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1、BRITISH STANDARD BS 6755-1: 1986 Testing of valves Part 1: Specification for production pressure testing requirements UDC 621.646:620.1:532.11 BS 6755-1:1986 This British Standard, having been prepared under the direction of the Piping Systems Components Standards Committee, was published under the
2、authority of the Board of BSI and comes into effect on 31 December 1986 BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference PSE/7 Draft for comment 85/75573 DC ISBN 0 580 15479 3 Committees responsible for this British Standard The preparation of this Br
3、itish Standard was entrusted by the Piping Systems Components Standards Committee (PSE/-) to Technical Committee PSE/7, upon which the following bodies were represented: Amalgamated Union of Engineering Workers Associated Offices Technical Committee Association of Bronze and Brass Founders Associati
4、on of Hydraulic Equipment Manufacturers British Chemical Engineering Contractors Association British Compressed Gases Association British Foundry Association British Gas Corporation British Maritime Technology British Shipbuilders British Valve Manufacturers Association Ltd. Copper Development Assoc
5、iation Copper Tube Fittings Manufacturers Association Electricity Supply Industry in England and Wales Energy Industries Council Engineering Equipment and Materials Users Association GAMBICA (BEAMA Ltd.) General Council of British Shipping Health and Safety Executive Institute of British Foundrymen
6、Institution of Chemical Engineers Institution of Gas Engineers Institution of Mechanical Engineers Institution of Water Engineers and Scientists Society of British Gas Industries Steel Casting Research and Trade Association Water Authorities Association Water Companies Association Amendments issued
7、since publication Amd. No.Date of issueComments BS 6755-1:1986 BSI 12-1998i Contents Page Committees responsibleInside front cover Foreword ii Section 1. General 1Scope 1 2Definitions 1 Section 2. Performance 3General 2 4Pressure-containing capability of valve shell 2 5Butterfly valve disk strength
8、2 6Seat leakage 2 7Back seat leakage 2 8Test certificate 2 Appendix A Equivalent leakage rates 4 Appendix B Test durations 4 Appendix C Equivalent sizes of valves having flanged ends, threaded ends, weld ends and capillary or compression ends 5 Appendix D Pressure tests 5 Table 1 Maximum permissible
9、 seat test leakage rates 3 Table 2 Maximum permissible back seat test leakage rates 3 Table 3 Equivalent leakage rates 4 Table 4 Test durations 4 Table 5 Equivalent sizes of valves 5 Publications referred to Inside back cover BS 6755-1:1986 ii BSI 12-1998 Foreword This Part of BS 6755 has been prepa
10、red under the direction of the Piping Systems Components Standards Committee. BS 6755 is published in two Parts: Part 1: Specification for production pressure testing requirements; Part 2:1) Specification for fire type-testing requirements. This Part of BS 6755 will supersede BS 5146-1 and BS 5146-2
11、 and is related to ISO 5208-1982, published by the International Organization for Standardization (ISO), but is not equivalent in technical content. The main differences are as follows. a) Pressure test requirements specified in BS 5146-1 have been included in this Part of BS 6755 which are not spec
12、ified in ISO 5208. b) More details of the test methods are given in this Part of BS 6755. c) Maximum allowable leakage rates for the seat and back seat tests are designated differently to ISO 5208 and BS 5146-2 and therefore a table of equivalent leakage rates is given in appendix A. d) The minimum
13、durations for pressure tests do not necessarily comply with ISO5208; the actual test durations are given in the valve product standards. e) For guidance, a table of test durations is given in appendix B and may be used where an appropriate valve product standard does not exist or where test times ar
14、e not specified in a standard. f) For comparison and information, a table of equivalent sizes of valves having different ends is given in appendix C. This Part of BS 6755 establishes the basic requirements and methods for the production pressure testing of valves. It revises the production pressure
15、testing requirements specified in BS 5146-1:1974 and BS 5146-2:1984 both of which will eventually be superseded by this Part of BS 6755 and will be withdrawn. In the meantime valves should be tested, as appropriate, in accordance with either: It is the intention to refer to this Part of BS 6755 for
16、production pressure testing in all the valve product standards listed in this foreword and this will be achieved either by revisions to existing standards or by amendments published to existing standards. It is expected that all valves will be required to be production pressure tested in accordance
17、with this Part of BS 6755 within a date of 2 years of publication of this standard. Within this period BS 5146-2:1984 will be withdrawn and the production pressure testing requirements specified in BS 5146-1:1974 will be deleted together with clauses covering inspection requirements. 1) In preparati
18、on 1) i)BS 5146-1:1974; ii) BS 5146-2:1984; iii) the requirements in the relevant valve product standard; or 2) this Part of BS 6755. BS 6755-1:1986 BSI 12-1998iii It is intended that this Part of BS 6755 be used in conjunction with the appropriate valve product standard when specified wholly or in
19、part only by the valve product standard or with a valve application standard, e.g. BS 759-1, when applicable. In particular, it applies when specified by any one of the following valve product standards: This Part of BS 6755 gives general test requirements: specific test requirements, such as test d
20、urations and permissible leakage rates, are or will be included in the valve product standards. In addition, it may be used for the pressure testing of valves not covered by product standards. Throughout this standard all pressures specified are gauge pressures (in bar2). It has been assumed in the
21、drafting of this Part of BS 6755 that the execution of its provisions is entrusted to appropriately qualified and experienced people because it calls for procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the
22、 user from legal obligations relating to health and safety at any stage. This refers, in particular, to pneumatic testing (seeD.2 and D.5) and attention is drawn to Guidance Note GS4, “Safety in pressure testing”, produced by the Health and Safety Executive and published by HMSO. A British Standard
23、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 i
24、nside front cover, pages i to iv, pages 1 to 10, 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. BS 1414BS 5153BS 5159BS 6364 BS 1868BS 5154BS
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