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1、Specification for flanges and bolting for pipes,valves and fittingsBS 10:2009raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsBS 10:2009BRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displayed in this
2、document indicates when the document was last issued.BSI 2009 ISBN 978 0 580 61296 1ICS 23.040.60The following BSI references relate to the work on this standard:Committee reference PSE/15 Draft for comment 08/30174939 DCPublication historyFirst published as BS 10-1:1947,BS 10-2:1926,BS 10-3:1929,BS
3、 10-4:1931 and BS 10-5:1932First published as BS 10,December 1962Second(present)edition,April 2009Amendments issued since publicationDate Text affected w w w.b z f x w.c o mBRITISH STANDARD BSI 2009 iBS 10:2009 ContentsForeword iii1 Scope 12 Normative references 13 Design temperature and pressure 24
4、 Designation 25 Flange dimensions 26 Flange materials 37 Attachment of flanges 48 Hydraulic testing of flange joints 49 Certification 410 Low temperature flanges and bolting 6AnnexesAnnex A(informative)Information to be supplied by the purchaser 33Annex B(informative)Minimum requirements of steel to
5、 be used for flanges in Table A to Table H 34Annex C(normative)Bolts and nuts 37Bibliography 41List of figuresFigure 1 Shaped stud bolt(see C.4)25Figure 2 Application diagram for bolts and stud-bolts:carbon and flanges 26Figure 3 Steel or copper alloy plain flange 28Figure 4 Steel boss flange 29Figu
6、re 5 Integrally forged or cast steel flange for valves only 30Figure 6 Steel welding neck flange(see Table D to Table T)31Figure 7 Integrally cast iron flanges(see Table F and Table H)32List of tablesTable 1 Flange materials minimum requirements 3Table 2 Temperature/pressure ratings for carbon steel
7、 flanges see Annex B 5Table A Dimensions of plain,boss,integrally cast or forged flanges(for ratings see Table 2 and Annex B)7Table D Dimensions of plain,boss,integrally cast or forged and welding neck flanges(for ratings see Table 2 and Annex B)9Table E Dimensions of plain,boss,integrally cast or f
8、orged,and welding neck flanges(for ratings see Table 2 and Annex B)12Table F Dimensions of plain,boss,integrally cast or forged,and welding neck flanges(for ratings see Table 2 and Annex B)14Table H Dimensions of plain,boss,integrally cast or forged,and welding neck flanges(for ratings see Table 2 a
9、nd Annex B)16Table J Dimensions of plain,boss,integrally cast or forged,and welding neck flanges(for ratings see Table 2 and Annex B)18Table K Dimensions of plain,integrally cast or forged,and welding neck flanges(for ratings see Table 2 and Annex B)19Table R Dimensions of plain,integrally cast or f
10、orged,and welding neck flanges(for ratings see Table 2 and Annex B)21Table S Dimensions of plain,integrally cast or forged,and welding neck flanges(for ratings see Table 2 and Annex B)22Table T Dimensions of plain,integrally cast or forged,and welding neck flanges(for ratings see Table 2 and Annex B
11、)24Table B.1 Grey cast iron properties 34Table B.2 Temperature/pressure ratings for grey cast iron and malleable cast iron flanges see Clauses 5g)and 5h)35w w w.b z f x w.c o mBS 10:2009ii BSI 2009BRITISH STANDARDTable B.3 Temperature/pressure ratings for copper alloy flanges sizes 12 in to 3 in(inc
12、lusive)see Clause 5j)35Table B.4 Temperature/pressure ratings for copper alloy flanges sizes over 3 in see Clause 5f)36Table C.1 Application of bolts and stud-bolts see Figure 2a)and Figure 2b)37Table C.2 Materials,dimensions and finish of bolts,stud-bolts and nuts 39Summary of pagesThis document co
13、mprises a front cover,an inside front cover,pages i to iv,pages 1 to 42,an inside back cover and a back cover.w w w.b z f x w.c o mBRITISH STANDARD BSI 2009 iiiBS 10:2009 ForewordPublishing informationThis British Standard is published by BSI and came into effect on 30 April 2009.It was prepared by
14、Technical Committee PSE/15,Flanges.A list of organizations represented on this committee can be obtained on request to its secretary.SupersessionThis British Standard supersedes BS 10:1962,which is withdrawn.Information about this documentIt should be noted that,apart from cast iron flanges,the hydr
15、aulic test pressure applied to a flange joint is limited to one-and-a-half times the highest rated pressure of the flange(see Clause 8).This is a full revision of the standard,and introduces the following principal changes:Materials have been updated;The standard has been re-arranged to reflect the
16、most common used materials and types in service;Review of tables:BS 10 flanges have been in use since 1904 and have been developed continuously to meet increasing pressure and temperature requirements.At the time of this revision,flange joints with carbon steel pipe flanges for high temperatures and
17、 pressures to the British Standard tables have been in service throughout the world for periods equal to the economic life of primary plant.The tables have therefore remained in the standard for guidance.NOTE When it is required to convert the figures in this standard from imperial units into metric
18、 units it is recommended that the conversion factors and the table of conversion contained in BS 350,“Conversion factors and tables”,be used.Attention is also drawn to BS 2856,“Precise conversion of inch and metric sizes on engineering drawings”.(Use 1 in=25 mm when converting to metric dimensions.)
19、Presentational conventionsThe provisions of this standard are presented in roman(i.e.upright)type.Its requirements are expressed in sentences in which the principal auxiliary verb is“shall”.Commentary,explanation and general informative material is presented in smaller italic type,and does not const
20、itute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of a contract.Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.w w w.b z f x w.c o
21、 mBS 10:2009iv BSI 2009BRITISH STANDARDThis page deliberately left blankw w w.b z f x w.c o mBRITISH STANDARD BSI 2009 1BS 10:2009 1 ScopeThis British Standard specifies requirements for a series of carbon steel,alloy steel,cast iron and copper alloy flanges,and also appropriate bolts and nuts,for u
22、se with pipes,valves and fittings containing steam,oil,compressed air or water.NOTE 1 The use of flanges complying with this standard for temperatures below 17.8 C(0 F)should be agreed between purchaser and manufacturer.These flanges may also be used on pipes,valves and fittings carrying other fluid
23、s for which the same requirements for safety and joint tightness are appropriate.The applicability relationship between temperature and pressure for the above materials is specified for each table of flanges in Table 2 and Annex B.NOTE 2 The types of gasket,and gasket materials,and the surface finis
24、h of the jointing face are matters for agreement between the purchaser and the manufacturer.When a raised jointing face is specified the outside diameter of the gasket should extend at least to the outside diameter of the raised face.For steel flanges when a raised jointing face is not specified,the
25、 gasket should be within the bolt holes.2 Normative referencesThe following referenced documents are indispensable for the application of this document.For dated references,only the edition cited applies.For undated references,the latest edition of the referenced document(including any amendments)ap
26、plies.BS 21,Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads(metric dimensions)BS 84,Parallel screw threads of Whitworth form RequirementsBS 916,Specification for black bolts screws and nuts Hexagon&square,with B.S.W.threads,and partly machine
27、d bolts,screws&nuts,hexagon&square with B.S.W.or B.S.F.threadsBS 1580-1,Unified screw threads Part 1:Screw threads with diameters 14 in and larger RequirementsBS 1769,Specification for unified black hexagon bolts,screws and nuts (UNC and UNF threads)heavy seriesBS 3410,Specification for metal washer
28、s for general engineering purposesBS EN 10090,Wrought steels in the form of bars,billets,and forgings,up to 6 in ruling section,for automobile and general engineering purposes En seriesBS EN 10025-2,Hot rolled products of structural steels Part 2:Technical delivery conditions for non-alloy structura
29、l steelsBS EN 10222-2,Steel forgings for pressure purposes Part 2:Ferritic and martensitic steels with specified elevated temperature propertiesBS EN 13480 Parts 1-5,Metallic industrial pipingBS EN 14324,Brazing Guidance on the application of brazed jointsBS EN 10204,Metallic products Types of inspe
30、ction documentsw w w.b z f x w.c o mBS 10:20092 BSI 2009BRITISH STANDARD 3 Design temperature and pressure3.1 The design temperature and pressure shall be stated by the purchaser.The tables provided in this standard are for guidance only and are based on historical data contained in previous revisio
31、ns of this standard.If verification is required,this shall be the responsibility of the purchaser.One method of verification that could be used is BS EN 1591-1.3.2 Where there is an appropriate application standard the purchaser shall ensure that the design temperature and pressure stated conform to
32、 the requirements of that standard.NOTE The temperature-pressure ratings given in Table 2 and Annex B are design temperatures and pressures.3.3 The pressure ratings,with the exception of those in the second column in Table B.2,shall be applied to installations subject to moderate shock such as might
33、 occur in an efficiently designed and operated boiler feed main.3.4 Where a system might be subject to more severe shock,the purchaser shall make a suitable allowance when stating the design pressure or the flange table.4 DesignationFlange sizes shall be designated by the nominal bores of their resp
34、ective pipes as given in the first and last column of each table.5 Flange dimensions 5.1 GeneralFlange dimensions shall conform to those specified in the appropriate tables and Figure 3 to Figure 7.NOTE The thicknesses and diameters of flanges specified are minima.5.2 Raised jointing faces for steel
35、 flanges only(see Figure 3 to Figure 6)NOTE 1 Raised jointing faces specified in Table H,Table J and Table K are recommended only for steel flanges.If a raised jointing face is required on a steel flange specified in Table A,Table D,Table E and Table F,the diameter shall be 14 in less than the diame
36、ter of the inscribed circle touching the bolt holes.NOTE 2 Raised jointing faces are not specified in Table H,Table J and Table K because it is not customary to use them on these flanges.Raised jointing faces as specified in Table R,Table S and Table T shall be used.5.3 Flange thicknesses(see Figure
37、 3 to Figure 7)NOTE 1 The thickness(T)specified in the tables includes a raised jointing face having a height not exceeding 116 in.Where there is no raised face,T is the thickness of the flange.If the height of the raised jointing face is more than 116 in,the thickness(T)is increased by an equivalen
38、t amount.The backs of integrally cast steel flanges shall be machined.w w w.b z f x w.c o mBRITISH STANDARD BSI 2009 3BS 10:2009NOTE 2 This machining may be either by spot-facing at the bolt holes or by back-facing at the option of the manufacturer(see Figure 5).The backs of other flanges may be lef
39、t unmachined at the option of the manufacturer unless otherwise specified by the purchaser.After machining,the thickness of the flange shall be not less than the thickness specified.5.4 Flange drillingUnless otherwise specified by the purchaser all bolt holes shall be drilled,shall be equally spaced
40、 on the bolt pitch circle diameter,and in the case of integral flanges the bolt holes shall be drilled off centres.For 12 inch and 58 inch bolts,the diameters of the holes shall be 116 inch larger than the diameters of the bolts,except that for cast iron flanges with 58 inch bolts the holes can be 1
41、8 inch larger than the diameters of the bolts.For 34 inch bolts and larger,the diameter of the holes shall be not greater than 18 inch larger than the diameters of the bolts in all cases.6 Flange materials6.1 Steel flanges either forged,stamped or plate shall be manufactured from materials conformin
42、g to the minimum requirements as set out in Table 1.NOTE Alternative materials can be used providing that the mechanical properties at operating temperature are not inferior to those given in the specifications set out in Table 1.Table 1 Flange materials minimum requirementsFlange tableTemperature r
43、ange 17.8 C to 427 C inc.(0 F to 800 F inc.)A to J inclusiveBS EN 10025-2,S235JR K to T inclusiveBS EN 10025-2,S275JR BS EN 10222-2,P245GH NOTE For the minimum requirements of steel that can be used for flanges in Table A to Table H inclusive for temperatures from 17.8 C(0 F)to 260 C(500 F),see Anne
44、x B.6.2 Flanges shall be free from laminations and surface defects.6.3 Where welding neck flanges are made from wrought steel the direction of the fibres of the material in the neck shall be parallel to the longitudinal axis of the flange.6.4 If the purchaser requires certificates of the process,che
45、mical analysis of the specified elements and physical properties of the materials,this shall be stated on the order.6.5 When the purchaser requires the individual flange he has ordered to be marked to identify the materials used,the system of marking to be employed shall be the subject of agreement
46、between the purchaser and the manufacturer.w w w.b z f x w.c o mBS 10:20094 BSI 2009BRITISH STANDARD 7 Attachment of flanges7.1 The method of securing flanges(other than integral flanges)to pipes and fittings supplied complete by manufacturers shall be in accordance with the appropriate application
47、standard.Where there is no appropriate application standard,the methods of attachment shall be the subject of agreement between the purchaser and the manufacturer.NOTE Where there is no appropriate application standard,the methods shown in BS EN 13480,Parts 1 to 5 and BS EN 12449 should be regarded
48、as minimum requirements.7.2 If flanges are to be supplied loose,they shall,unless otherwise specifically called for by the purchaser,be prepared for attachment to pipes as follows.a)Steel flanges.1)Boss flanges,sizes 6 in and smaller,screwed in accordance with BS 21.2)Boss flanges,sizes 7 in to 12 i
49、n machined in the bore to slip over the outside diameter of the pipe or fitting;suitable for welding.3)Plain flanges 12 in thick and thicker,machined in the bore;suitable for welding-on to form one of the types in the appropriate application standard as required by the purchaser.The purchaser shall
50、specify the type of preparation required.4)Welding neck flanges,machined in the bore to a diameter to be specified by the purchaser,and suitably bevelled for welding to pipes or fittings.b)Copper alloy flanges.Machined in the bore to slip over the outside diameter of the pipe or fitting;suitable for