BS 1868-1975(R1990) Steel check valves(flanged and butt-welding ends) for the petroleum,petrochemical and allied industries.pdf
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1、BRITISH STANDARD BS 1868:1975 Reprinted, incorporating Amendment No. 1 Specification for Steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries UDC 665.6: 621.646.248: 669.14 - - - - - - - - - - - - BS 1868:1975 This British Standard, having been ap
2、proved by the Petroleum Equipment Industry Standards Committee, was published under the authority of the Executive Board on 28 November 1975 BSI 02-1999 First published, June 1952 First revision, March 1960 Second revision, November 1975 The following BSI references relate to the work on this standa
3、rd: Committee reference PEE/1 Draft for comment 74/74150 DC ISBN 0 580 08817 0 Co-operating organizations The Petroleum Equipment Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government department and scienti
4、fic and industrial organizations: British Gas Corporation British Mechanical Engineering Confederation British Rubber Manufacturers Association Ltd. British Steel Industry* Council of British Manufacturers of Petroleum Equipment* Department of Energy Oil Companies Materials Association* The industri
5、al organizations marked with an asterisk in the above list, together with the following, were directly represented on the Committee entrusted with the preparation of this standard: Association of Hydraulic Equipment Manufacturers British Chemical Engineering Contractors Association British Industria
6、l Measuring and Control Apparatus Manufacturers Association British Plastics Federation British Ship Research Association British Valve Manufacturers Association Engineering Equipment Users Association Steel Castings Association Amendments issued since publication Amd. No.Date of issueComments 6563J
7、uly 1990Indicated by a sideline in the margin - - - - - - - - - - - - BS 1868:1975 BSI 02-1999i Contents Page Co-operating organizations Inside front cover Foreword ii Section 1. General 1Scope 1 2References 1 3Definitions 1 4Pressure classification 1 5Pressure/temperature ratings 1 6Nominal sizes 1
8、 7Information to be supplied by the purchaser 2 Section 2. Design 8Body 2 9Cover 5 10Disk, piston or ball 5 11Piston and ball guides 5 12Hinge and hinge pin (swing type) and spindle support cage (disk type) 5 13Special fitments 6 14Cover bolting 6 15Soft seal ring 6 Section 3. Materials 16Shell 6 17
9、Body seat ring 6 18Body/cover gasket and pipe plug gasket 6 19Disk, piston or ball 7 20Trim 7 21Hinge (swing type) and spindle support cage (disk type) 7 22Plug 7 23Cover bolting 7 24Nameplate 7 25Soft seal ring 7 26Special fitments 7 27Special applications 8 Section 4. Marking 28Required markings 1
10、0 29Body and nameplate markings 10 30Cover marking 10 31Body marking 10 32Direction of flow 10 33Nameplate marking 10 34Additional markings 11 35Omission of markings 11 Section 5. Testing 36Production pressure testing 11 - - - - - - - - - - - - BS 1868:1975 ii BSI 02-1999 Page Section 6. Shipping 37
11、Preliminary 11 38Preparation for despatch 11 39Packaging 12 Appendix A Application to piping systems with BS 4504-1 flanges 20 Figure 1 Swing type check valves 13 Figure 2 Piston type check valves 15 Figure 3 Ball type check valves 16 Figure 4 Ball type check valve 17 Figure 5 Disk type check valves
12、 18 Figure 6 Butt-welding ends 19 Table 1 Dimensions of check valves 4 Table 2 Trim materials, hardness and acceptable specifications 9 Table 2(a) Test durations11 Table 3 Nominal pressure and class ratings and nominal size range 20 Table 4 Table deleted 22 Publications referred toInside back cover
13、- - - - - - - - - - - - BS 1868:1975 BSI 02-1999iii Foreword This British Standard is one of a series prepared under the authority of the Petroleum Equipment Industry Standards Committee. It was first published in 1952 when materials referred to in it were described by reference to ASTM specificatio
14、ns. In 1960 a revision of BS 1868 was published in order to bring it into alignment with the 1958 editions of BS 1501 to BS 1506 and BS 1560. This edition is the metric version of BS 1868, and wherever possible metric dimensions and references are given. The recognized metric nominal piping sizes ha
15、ve been used. The previous sections dealing with test have not been included in this standard as these are now the subject of a separate standard BS 6755 “Testing of valves. Part 1. Specification for production pressure testing requirements”. NOTERequirements for final inspection and supplementary i
16、nspection at all stages of manufacture, previously specified in BS 5146-1:1974 (now withdrawn) should be stated by the purchaser in his enquiry or order. Disk type and angle pattern valves and butt-welding end versions of all types have been added and the range has been extended to incorporate large
17、r sizes. The face-to-face and end-to-end dimensions of valves complying with the requirements of this standard, where applicable, are in accordance with ANSI B16-10 but are not now included here, as these are in BS 2080 “Specification for face-to-face, centre-to-face, end-to-end and centre-to-end di
18、mensions of flanged and butt-welding end steel valves for the petroleum, petrochemical and allied industries”. End flanges are in accordance with BS 1560-2 (which corresponds to ANSI B16-5) and butt-welding ends are in accordance with ANSI B16-25. NOTEUser requirements for valves generally in accord
19、ance with this standard, but suitable for use in piping systems with flanges complying with the requirements of BS 4504-1, are dealt with in appendix A. The range of shell materials has been extended to align with the latest edition of BS 1560-2; also the range of materials for the trim and other co
20、mponents has been extended. This standard does not cover valves suitable for the passage of spheres or pig scrapers. It is drawn to the readers attention that at the time of publication of this standard proposals are under discussion in CEN/WG74, “Flanges”, effectively recommending that the use of B
21、S 4504 (DIN) flanges be limited to 40 bar maximum ratings. Such proposals may possibly result in the publication of a European Standard. Acknowledgement is made to the American Petroleum Institute and to the American National Standards Institute for data used. A British Standard does not purport to
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