BS 5353-1989 Specification for steel plug valves《钢塞阀规范》.pdf

1、BRITISH STANDARD BS 5353:1989 Specification for Steel plug valves UDC 621.646.614:669.1:001.4:620.1BS5353:1989 This British Standard, havingbeen prepared under thedirectionof the Piping SystemsComponents StandardsCommittee, was published under the authorityofthe Board of BSI andcomes intoeffect on 2

2、8 February1989 BSI 07-1999 First published June1980 First revision February1989 The following BSI references relate to the work on this standard: Committee reference PSE/7 Draft for comment87/70333DC ISBN 0 580 17081 0 Committees responsible for this British Standard The preparation of this British

3、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 Association of

4、Building Component Manufacturers Ltd. British Chemical Engineering Contractors Association British Compressed Gases Association British Foundry Association British Gas plc British Maritime Technology British Shipbuilders British Valve and Actuator Manufacturers Association Ltd. Chartered Institution

5、 of Building Services Engineers Copper Development Association Copper Tube Fittings Manufacturers Association Department of the Environment (Property Services Agency) Electricity Supply Industry in England and Wales Energy Industries Council Engineering Equipment and Materials Users Association GAMB

6、ICA (BEAMA Ltd.) Health and Safety Executive Institute of British Foundrymen Institution of Chemical Engineers Institution of Gas Engineers Institution of Mechanical Engineers Institution of Water and Environmental Management (IWEM) Society of British Gas Industries Steel Casting Research and Trade

7、Association Water Authorities Association Water Companies Association The following body was also represented in the drafting of the standard, through subcommittees and panels: Scottish Council Development and Industry Amendments issued since publication Amd. No. Date of issue CommentsBS5353:1989 BS

8、I 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii Section 1. General 1 Scope 1 2 Definitions 1 3 Valve patterns 2 4 Nominal sizes 2 5 Pressure designation 2 6 Pressure/temperature ratings 2 7 Dimensions 2 Section 2. Design and materials 8 Design 5 9 Operation 7 10 Mater

9、ials 7 Section 3. Testing 11 Pressure testing 9 12 Fire testing 9 13 Anti-static testing 9 14 Manufacturers certificate 9 Section 4. Marking 15 General 10 Section 5. Preparation for storage and transportation 16 General 11 17 Body ends 11 Appendix A Information to be supplied by purchaser 12 Appendi

10、x B Weld-end preparations 13 Appendix C Typical plug valve constructions 15 Figure 1 Location of tappings 6 Figure 2 Weld-end preparation 13 Figure 3 Typical bevel for shell wall thicknesses (t)22mm or less for pipeline applications 14 Figure 4 Lubricated plug valve. Parallel plug 15 Figure 5 Lubric

11、ated plug valve. Taper plug 16 Figure 6 Lubricated plug, taper plug, pressure balanced 17 Figure 7 Soft seated plug valve 18 Table 1 Nominal size of valves and pressure designation 3 Table 2 Minimum pressure/temperature soft seat ratings 3 Table 3 Class800 body pressure/temperature ratings 4 Table 4

12、 End-to-end dimensions of butt-weld-end valves 4 Table 5 Socket-weld-end details 4 Table 6 Minimum shell wall thickness 5 Table 7 Body tappings 6 Table 8 Additional materials permitted for use in the manufacture of valves smaller than DN50 from bar-stock 8 Table 9 Pressure test durations 9 Table 10

13、Typical material symbols 10 Publications referred to 20BS5353:1989 ii BSI 07-1999 Foreword This revision of this British Standard has been prepared under the direction of the Piping Systems Components Standards Committee and supersedes BS5353:1980 which is withdrawn. The opportunity has been taken i

14、n carrying out this revision to introduce internationally agreed pressure/temperature ratings, based on the definition of nominal pressure (PN) given in International Organization for Standardization (ISO) standard7268, covering ratings previously given in German (DIN) and American (ANSI) standards.

15、 However, in this revision the use of PN has been limited to valves with flanges designated PN10, PN16, PN25 and PN40 in accordance with BS4504-3.1. For valves with flanges complying with BS1560-3.1, Class ratings have been retained. The designation Class800 for threaded and socket weld end valves h

16、as also been retained as there is no equivalent in the PN system. This revision also takes account of the latest agreements in ISO/TC153/SC1, Valves Design, construction, marking and testing, and ISO/TC5/SC10, Metallic flanges and their joints. On this basis the terminology and definitions in this s

17、tandard are in accordance with those given in ISO standards and the minimum bore dimensions conform to those agreed in ISO/TC153/SC1. However at the time of publication of this British Standard no corresponding international standard exists. The main differences between this British Standard and the

18、1980 edition are as follows. a) Class400 valves have been omitted. b) The range of sizes for PN designated valves has been extended to nominal sizes up to and including DN600. c) Details of socket-weld end dimensions are included. d) A greater choice of materials is available for the pressure contai

19、ning shell and some additional requirements are given for trim component materials. e) Details of anti-static testing are included and reference is made to BS6755-1 for production pressure testing. Pressure test durations have changed. f) Requirements for fire type-testing are included. In clause 12

20、 reference is made to both BS5146-1 and BS6755-2 for fire testing. It is intended that BS5146-1 will be withdrawn on31 July1990 and thereafter clause12 will be amended to require fire testing in accordance with BS6755-2 only. The minimum pressure/temperature seat ratings given in this standard for s

21、oft seated valves are based on the use of PTFE without fillers, of virgin material completely free of reclaimed processed material for the valve seats, but attention is drawn to the use of alternative seat materials that could give higher pressure/temperature ratings. Pressure/temperature ratings of

22、 the soft seated valve are dependent on both the body rating and the pressure capability of the seats. Seat pressure capability will be limited by the strength of the seat material, particularly by the loss of strength which may occur at elevated temperatures. The applicable valve pressure rating at

23、 any temperature will, therefore, be limited by either the body rating or the seat rating. Throughout this British Standard those dimensions shown in parentheses are non-preferred. The non-preferred sizes are given for replacement of existing valves; they are not recommended for new pipework systems

24、. Attention is drawn to BS5158, which specifies cast iron valves for less arduous duties than valves covered by this standard and to BS6683 for guidance on the installation of valves.BS5353:1989 BSI 07-1999 iii Product certification. Users of this British Standard are advised to consider the desirab

25、ility of third party certification of product conformity with this British Standard based on testing and continuing surveillance which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS5750. Enquiries as to the availability of third party certification s

26、chemes will be forwarded by BSI to the Association of Certification bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. A British Standard does not purport to include all the necessary provi

27、sions 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, pagesi to iv, pages1to20, an ins

28、ide 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.iv blankBS5353:1989 BSI 07-1999 1 Section 1. General 1 Scope This British Standard specifies requirem

29、ents for the valve seat and body pressure/temperature ratings and the design, including materials, dimensions, operation, performance, testing and marking of lubricated, and soft seated and lined plug valves having a steel shell with specified shell wall thickness. This standard also specifies anti-

30、static requirements, an optional fire tested design and the option of a steel or cast iron plug. It applies to short, regular or venturi pattern valves. The range of valves covered by this standard are given in Table 1 (see alsoclause4). Pressure/temperature ratings of the linings of lined valves an

31、d flange attachment methods, other than those specified in 8.4, are outside the scope of this standard. NOTE 1The information to be supplied by the purchaser at the time of the enquiry/order is given in Appendix A. Appendix B shows typical weld-end preparations. Examples of typical plug valve constr

32、uctions are contained in Appendix C. NOTE 2The titles of the publications referred to in this standard are listed on page 20. 2 Definitions For the purposes of this British Standard, the following definitions apply. 2.1 face-to-face dimension for flanged valves, the distance between the extremities

33、of the flange faces 2.2 end-to-end dimension for butt-weld end valves, the distance between the extremities of the connecting ends 2.3 anti-static design a feature that may be inherent or incorporated in the design of the valve that ensures electrical continuity between the plug, stem and the body o

34、f the valve 2.4 fire type-tested design a design that is capable of complying with BS6755-2 2.5 anti-blow-out stem a design that ensures the valve stems cannot be blown out of the body in the event of the stem seal retainer, e.g.gland, being removed while the valve is under pressure 2.6 nominal size

35、 (DN) a numerical designation of size which is common to all components in a piping system other than those components designated by outside diameter or by thread size. It is a convenient round number for reference purposes and it is normally only loosely related to manufacturing dimensions NOTE 1No

36、minal size is designated by the letters DN followed by a number. NOTE 2This definition is identical with that given in ISO6708. 2.7 nominal pipe size (NPS) a designation of size in inches which is common to all components in a piping system other than those components designated by outside diameter.

37、 It is a convenient number for reference purposes and it is normally only loosely related to manufacturing dimensions NOTE 1Nominal pipe size is designated by the letters NPS followed by a number. NOTE 2NPS is used only in association with the “Class” rating system. 2.8 thread size (TS) a fractional

38、 designation of size independent of any unitary system that is used to identify threaded (BS21) connections in valves 2.9 nominal pressure (PN) a numerical designation which is a convenient rounded number for reference purposes all the equipment of the same nominal size (DN) designated by the same P

39、N number shall have compatible mating dimensions NOTE 1The maximum allowable working pressure depends on materials, design and working temperatures, and should be selected from the tables of pressure/temperature ratings given in the appropriate standards. NOTE 2Nominal pressure is designated by the

40、latters PN followed by the appropriate reference number. NOTE 3This definition is identical with that given in ISO7268. 2.10 class a numerical designation for reference purposes NOTE 1The maximum allowable working pressure depends on materials, design and design temperature and should be selected fr

41、om the tables of pressure/temperature ratings given in the appropriate standards. NOTE 2Class is designated by the word Class followed by the appropriate reference number.BS5353:1989 2 BSI 07-1999 2.11 lubricated plug valve a valve having the mating surfaces of the plug and body separated from each

42、other by a pressurized, renewable film of lubricant/sealant (see Appendix C) 2.12 soft seated plug valve a non-lubricated valve having soft seats of a low frictional material fitted between the body and the plug (see Appendix C) 2.13 lined plug valve a valve having a fully moulded, bonded or keyed n

43、on-removable lining on all internal wetted surfaces that may be lubricated or non-lubricated 2.14 short plug valve a valve having end-to-end dimensions corresponding with wedge gate valves (as specified in BS2080) 2.15 regular plug valve a valve generally having plug ports of greater area than short

44、 or venturi valves 2.16 venturi plug valve a valve having reduced plug port area and a body throat approximating to a venturi 3 Valve patterns Valves shall be short, regular or venturi pattern. NOTEIn Class150, PN10 and PN16 the venturi and regular pattern are available only in the long series of en

45、d-to-end dimensions in accordance with BS2080. In all other cases short, venturi and regular pattern valves have the same end-to-end dimensions. 4 Nominal sizes Valves shall be of nominal sizes (DN) or nominal pipe sizes (NPS) or threaded sizes (TS) according to type of end fitting as given in Table

46、 1. 5 Pressure designation Pressure designation of valves shall be as given in Table 1. 6 Pressure/temperature ratings NOTE 1The pressure/temperature ratings of the linings of lined valves are outside the scope of this standard. NOTE 2Since the maximum or minimum operating temperature may be limited

47、 by the grade of lubricant/sealant used in the valve, attention is drawn to10.10. 6.1 Soft seated valves Minimum pressure/temperature seat ratings of soft seated valves shall be as given in Table 2. With the exception of the soft seats and primary seals, all valve components shall be capable of with

48、standing the pressure/temperature ratings as specified in BS1560-3.1, BS4504-3.1 or Table 3, as appropriate. 6.2 Metal seated valves Pressure/temperature ratings of metal seated valves shall be as specified in BS1560-3.1, BS4504-3.1 or Table 3, as appropriate. 7 Dimensions 7.1 Flanged-end valves 7.1

49、.1 Flange dimensions shall comply with BS1560-3.1 for Class designated valves or BS4504-3.1 for PN designated valves. NOTESee Table 1 for PN/Class relationship. 7.1.2 Face-to-face dimensions shall be in accordance with BS2080. Valves having flanges complying with BS4504-3.1 and pressure ratings (PN) as given in Table 1 shall have the same face-to-face dimensions as the corresponding Class designated valves (see Table 1). 7.2 Butt-weld-end valves End-to-end dimensions shall be in accordance with the following: a) Table 4 for PN10, PN16, PN25,