1、BRITISH STANDARD BS1655:1950 Incorporating Amendment Nos.1 and 2 Flanged automatic control valves For the process control industry (face-to-face dimensions)BS1655:1950 This British Standard, having been approved by the Petroleum Equipment Industry Standards Committee and the Instruments Industry Sta
2、ndards Committee and endorsed by the Chairman ofthe Engineering Divisional Council, was published under theauthority of the General Council on 12 July 1950 BSI07-1999 ISBN 0 580 35089 4 Co-operating organizations The Petroleum Equipment Industry Standards Committee and the Instruments Industry Stand
3、ards Committee, under whose supervision this British Standard was prepared, consist of representatives from the following Government departments and scientific and industrial organizations: Admiralty Department of Scientific and Industrial Association of Scientific Workers Research British Ceramic R
4、esearch Association Gauge and Tool Makers Association British Clock Manufacturers Association Incorporated Association of Kinematograph British Electrical and Allied Industries Manufacturers Ltd. Research Association Institute of Petroleum British Electrical and Allied Manufacturers Institute of Phy
5、sics Association Institution of Chemical Engineers British Electricity Authority Institution of Electrical Engineers British Industrial Measuring and Control Institution of Heating and Ventilating Apparatus Manufacturers Association* Engineers British Iron and Steel Federation Institution of Mechani
6、cal Engineers British Nautical Instrument Trade Association Meteorological Office British Non-Ferrous Metals Federation Ministry of Education British Non-Ferrous Metals Research Ministry of Fuel and Power Association Ministry of Health British Photographic Manufacturers National Coal Board Associati
7、on, Ltd. Oil Companies Materials Committee* British Railways Radio Industry Council British Scientific Instrument Research Scientific Instrument Manufacturers Association Association Council of British Manufacturers of Society of Instrument Technology. Petroleum Equipment* The industrial organizatio
8、ns marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard : British Iron the listed dimensions may be used but are subject to agreement between the user and the manufacturer. b) Valves
9、 with flanges in accordance with BS1560 2) , Class150. c) Valves with flanges in accordance with Class125 (see BS5150 3) , Table7). Category1. a) Valves with flanges in accordance with BS1560, Class300. b) Valves with flanges in accordance with BS4504, PN25(25 bar) and PN40(40 bar). NOTEThese face-t
10、o-face dimensions are subject to international negotiation; the listed dimensions may be used but are subject to agreement between the user and the manufacturer. c) Valves with flanges in accordance with BS10 4) , Tables up to and including Table J, also Table L, Table M and Table P. NOTE 1Table C f
11、lange thicknesses are to be provided where valve flanges are called for in accordance with Table A and TableB, Table F thicknesses for Table D and Table F. NOTE 2BS10 is obsolescent. Category2. a) Valves with flanges in accordance with BS1560, Class600. b) Valves with flanges in accordance with BS45
12、04, PN64(64 bar) and PN100(100 bar). c) Valves with flanges in accordance with BS10, Table K and Table R. NOTEBS10 is obsolescent. 2 Sizes This British Standard covers face-to-face dimensions for valves of the following sizes: “ in.,# in.,1 in., 1“ in.,2in.,2“ in.,3 in.,4 in., 5in. 5) , 6in., 8 in.
13、These sizes correspond to nominal pipe sizes. 3 Face-to-face dimensions The face-to-face dimensions of automatic control valves with plain and raised faces shall be as shown in Table 1. The face-to-face dimensions of automatic control valves with ring-joint facings shall be as shown in Table 2. Exce
14、pt for ring-joint facings, female, grooved or recessed flanges are not covered by this standard. Notes on the facings of the various flange facing are given for the information of users in the Appendix. 4 Tolerance A tolerance of 1 / 16 in. shall be allowed on all face-to-face dimensions of valves.
15、1) BS4504, “Flanges and bolting for pipes, valves and fittings. Metric series.” 2) BS1560, “Steel pipe flanges and flanged fittings (nominal sizes “ in to24in) for the petroleum industry.” 3) BS 5150, “Cast iron wedge and double disk gate valves for general purposes.” 4) BS10, “Flanges and bolting f
16、or pipes, valves and fittings”. 5) The use of this size is not recommended.BS1655:1950 2 BSI 07-1999 Table 1 Face-to-face dimensions for valves with plain-faced and raised-face flanges Table 2 Face-to-face dimensions for valves with ring-joint flanges Nominal pipe size Category0 adimension A Categor
17、y1 adimension A Category2 adimension A in. in. in. in. “ 7! 7“ 8 # 7! 7* 8( 1 7! 7# 8! 1“ 8# 9! 9+ 2 10 10“ 11! 2“ 10+ 11“ 12! 3 11# 12“ 13! 4 13+ 14“ 15“ 5 b 16# 18 6 17# 18* 20 8 21) 22) 24 a See Clause1. b The use of this size is not recommended. Nominal pipe size Category0 adimension A Category1
18、 adimension B Category2 adimension B in. in. in. in. “ 7 15 /16 7 15 /16 # 8( 8( 1 7# 8! 8! 1“ 9! 9# 9+ 2 10“ 11( 11) 2“ 11 3 /5 12( 12) 3 12! 13( 13) 4 14) 15( 15* 5 b 17) 18( 6 18! 19! 20( 8 21+ 23 24( a See Clause1. b The use of this size is not recommended.BS1655:1950 BSI 07-1999 3 Appendix Note
19、s on flange facings Except for ring-joint facings, the face-to-face dimension is the distance between the faces of the connecting end-flanges upon which the gaskets are actually compressed, i.e.,the contact surfaces. Valves with flanges complying with BS10, Table D to Table P, may be plain-faced or
20、they may have a 1 / 16in. raised face which is included in the face-to-face dimension. Valves with flanges complying with BS10, Table R, may have a 1 / 16in. raised face which is included in the face-to-face dimension or they may be plain-faced. Valves with flanges complying with Class125 (seeBS5150
21、, Table7) have plain faces. Valves with flanges complying with BS1560, Classes150 and300, have a 1 / 16in. raised face which is included in the face-to-face dimension. Valves with flanges complying with BS1560, Class600, have a ! in. raised face which is included in the face-to-face dimension. When
22、it is desired to provide for a special facing, e.g.,a ring-joint facing on a valve with flanges complying with BS1560, Class600, twice the ! in. raised-face dimension is subtracted from the face-to-face dimension given in Table 1 to obtain the basic flanged-edge-to-flange-edge dimension. Then twice
23、the height of the special facing is added to the basic flange-edge-to-flange-edge dimension to determine the face-to-face dimension for the new joint. However, when the special facing is applied to a valve with flanges complying with BS1560, Classes150 and300, having a 1 / 16in. raised face, no dedu
24、ctions are made from the dimensions, given in Table 1 before making the additions for the special facing. Thus for right-joint facing, twice the depth of the groove is added to the basic flange-edge-to-flange-edge dimension to obtain the face-to-face dimension shown in Table 2. For ring-joint facing
25、s complying with BS1560, the face-to-face dimensions are the end-to-end dimensions. These dimensions, given in Table 2, include the depth of groove added to the basic flange-edge dimension.BS1655:1950 4 BSI 07-1999 Figure 1 End flange facingsBS1655:1950 BSI 07-1999 British Standards The following ar
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