BS 10-2009 PUBLISHING AND COPYRIGHT INFORMATION HE BSI COPYRIGHT NOTICE DISPLAYED IN THIS DOCUMENT INDICATES WHEN THE DOCUMENT WAS LAST ISSUED.1.pdf

Specification for flanges and bolting for pipes, valves and fittings BS 10:2009 raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI British Standards BS 10:2009BRITISH STANDARD Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. © BSI 2009 ISBN 978 0 580 61296 1 ICS 23.040.60 The following BSI references relate to the work on this standard: Committee reference PSE/15 Draft for comment 08/30174939 DC Publication history First published as BS 10-1:1947, BS 10-2:1926, BS 10-3:1929, BS 10-4:1931 and BS 10-5:1932 First published as BS 10, December 1962 Second (present) edition, April 2009 Amendments issued since publication Date Text affected BRITISH STANDARD © BSI 2009 i BS 10:2009 Contents Foreword iii 1 Scope 1 2 Normative references 1 3 Design temperature and pressure 2 4 Designation 2 5 Flange dimensions 2 6 Flange materials 3 7 Attachment of flanges 4 8 Hydraulic testing of flange joints 4 9 Certification 4 10 Low temperature flanges and bolting 6 Annexes Annex A (informative) Information to be supplied by the purchaser 33 Annex B (informative) Minimum requirements of steel to be used for flanges in Table A to Table H 34 Annex C (normative) Bolts and nuts 37 Bibliography 41 List of figures Figure 1 Shaped stud bolt (see C.4) 25 Figure 2 Application diagram for bolts and stud-bolts: carbon and flanges 26 Figure 3 Steel or copper alloy plain flange 28 Figure 4 Steel boss flange 29 Figure 5 Integrally forged or cast steel flange for valves only 30 Figure 6 Steel welding neck flange (see Table D to Table T) 31 Figure 7 Integrally cast iron flanges (see Table F and Table H) 32 List of tables Table 1 Flange materials minimum requirements 3 Table 2 Temperature/pressure ratings for carbon steel flanges see Annex B 5 Table A Dimensions of plain, boss, integrally cast or forged flanges (for ratings see Table 2 and Annex B) 7 Table D Dimensions of plain, boss, integrally cast or forged and welding neck flanges (for ratings see Table 2 and Annex B) 9 Table E Dimensions of plain, boss, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 12 Table F Dimensions of plain, boss, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 14 Table H Dimensions of plain, boss, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 16 Table J Dimensions of plain, boss, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 18 Table K Dimensions of plain, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 19 Table R Dimensions of plain, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 21 Table S Dimensions of plain, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 22 Table T Dimensions of plain, integrally cast or forged, and welding neck flanges (for ratings see Table 2 and Annex B) 24 Table B.1 Grey cast iron properties 34 Table B.2 Temperature/pressure ratings for grey cast iron and malleable cast iron flanges see Clauses 5g) and 5h) 35 BS 10:2009 ii © BSI 2009 BRITISH STANDARD Table B.3 Temperature/pressure ratings for copper alloy flanges sizes 12 in to 3 in (inclusive) see Clause 5j) 35 Table B.4 Temperature/pressure ratings for copper alloy flanges sizes over 3 in see Clause 5f) 36 Table C.1 Application of bolts and stud-bolts see Figure 2a) and Figure 2b) 37 Table C.2 Materials, dimensions and finish of bolts, stud-bolts and nuts 39 Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 42, an inside back cover and a back cover. BRITISH STANDARD © BSI 2009 iii BS 10:2009 Foreword Publishing information This British Standard is published by BSI and came into effect on 30 April 2009. It was prepared by Technical Committee PSE/15, Flanges. A list of organizations represented on this committee can be obtained on request to its secretary. Supersession This British Standard supersedes BS 10:1962, which is withdrawn. Information about this document It should be noted that, apart from cast iron flanges, the hydraulic 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 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 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 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.) Presentational conventions The 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 constitute a normative element. Contractual and legal considerations This 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. BS 10:2009 iv © BSI 2009 BRITISH STANDARD This page deliberately left blank BRITISH STANDARD © BSI 2009 1 BS 10:2009 1 Scope This 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 use 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 fluids 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 finish 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 gasket should be within the bolt holes. 2 Normative references The 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) applies. 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 Requirements BS 916, Specification for black bolts screws and nuts Hexagon suitable for welding. 3) Plain flanges 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 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 fusion welding (where applicable). 8 Hydraulic testing of flange joints 8.1 This standard does not specify the hydraulic test pressures for flanged pipes or components, details of which shall be obtained from the appropriate standards which specify test pressures for pipes or components but in any case, the test pressure to be applied to the joint shall not exceed one-and-a-half times the highest rated pressures for steel and copper alloy flanges, and twice the highest rated pressures for cast iron flanges. 8.2 Where flanged assemblies are not covered by any standard specifying test pressures but incorporate flanges conforming to this standard, or where any assembly is to be used for duties of a special nature, the test pressure shall be agreed between the purchaser and the manufacturer. 9 Certification The flange manufacturer shall use respective procedures to ensure material traceability and to avoid material exchange and shall be able to provide retrospective certification for the base material used. Certificates shall be provided in accordance with BS 10204, EN Type 2.1 as a minimum but the purchaser may also request a 2.2 or 3.1 certificate at their option. BRITISH STANDARD © BSI 2009 5 BS 10:2009 Table 2 Temperature/pressure ratings for carbon steel flanges see Annex B TableTemperature °CMaximum hydraulic test pressure (lbf/in2) 17.8 to 121.1 17.8 to 232.2 260.0287.8315.6343.3371.1399427 Temperature °F 0 to 2500 to 450500550600650700750800 Pressure (lbf/in2) A50 A)25 B)75 D10095858070655550150 E200185170155140130115100300 F300280255235215195170150450 H500465430395355320285250750 J7006506005505004504003501 050 K9008357707056455805154501 350 R1 2001 1151 0309458557706856001 800 S1 8001 6701 5451 4151 2851 1551 0309002 700 T2 8002 6002 4002 2002 0001 8001 6001 4004 200 NOTE Intermediate values above 450°F (232.2°C) may be obtained by linear interpolation. A) It is customary in the gas industry to limit the use of Table A flanges to working gas pressures not exceeding 30 lbf/in2. It is recommended that this limitation be also applied to compressed air. B) This rating applies to temperatures above 121.1 °C (250 °F) up to and including 232.2 °C (450 °F) and does not apply to flange sizes above 36 in. BS 10:2009 6 © BSI 2009 BRITISH STANDARD 10 Low temperature flanges and bolting COMMENTARY ON CLAUSE 10 Alternative materials may be used provided that the mechanical properties at operating temperature are not inferior to those given in the specifications referred to below. Flanges and bolting for low temperature duty shall conform to the following minimum requirements. a) Steel flanges either plate, stamped, forged or cast and bolting material intended for use with pipes in accordance with BS 3603. Pressure ratings for these shall be stated by the purchaser. b) Where copper alloy flanges to this standard are used for temperatures down to 200 °C (328 °F), pressure ratings for these flanges shall be stated by the purchaser. Guidance is provided in Table B.3 or Table B.4, temperature range 17.8 °C to 121.1 °C (0 °F to 250 °F), and is based on historical data contained in previous revisions of this standard. NOTE 9% aluminium bronze to BS 2032 is a suitable bolting material for the above low temperature range, but other copper alloys may be used by agreement between the purchaser and the supplier. BRITISH STANDARD © BSI 2009 7 BS 10:2009 Table A Dimensions of plain, boss, integrally cast or forged flanges (for ratings see Table 2 and Annex B) Flange size designation (nominal bore of pipe) Approximate outside diameter of steel pipe A) Diameter of flange Bolt circle diameter No. of bolts Diameter of bolts B) Dimensions of boss (Fig 4) C)Thickness of flange Boss length Diameter at small end of boss Maximum diameter at root of boss Grey cast iron integrally cast or screwed on with boss Malleable cast iron screwed on with boss Copper alloy cast or wrought integral or boss or plain (Fig. 3) Wrought steel integral or plain (Fig. 3) or boss (Fig. 4) HLPNOABET1T2T3T4 inininininininininininin 3 342 4 3 1 51 3 3 D) 4 1 642 84 1 1 4 1 D) 11 1 4 3 44 1 2 6 1 1 3 D) 1 1 4 343 14 2 32 4 D) 1 11 35 43 84 2 2 4 1 4 D) 22 64 4 2 13 1 5 D) 2 36 54 3 3 1 5 D) 33 7 45 44 5 4 4 1 1 3 D) 3 12486 24 164 1 5 4 1 3 D) 44 8 74 5 45 4 3 D) 55 108 44 3 6 56 34 34 6 6 119 44 7 57 4 2 1 2 6 77 1210 48 8 38 34 88 513 411 8 5 9 10 99 14 12 48110 11 8 58 1010 416148 3 1 11 412 5 1212 4181681 13 414 34 131419 417 48 34 141520 418 811 151621 3419 811 1622 420 121 61 17182421 4121 61 1 1825 423121 61 192026 24121 1 1 2027 425 4121 1 1 21222926 121 1 1 BS 10:2009 8 © BSI 2009 BRITISH STANDARD Table A Dimensions of plain, boss, integrally cast or forged flanges (for ratings see Table 2 and Annex B) (continued) Flange size designation (nominal bore of pipe) Approximate outside diameter of steel pipe A) Diameter of flange Bolt circle diameter No. of bolts Diameter of bolts B) Dimensions of boss (Fig 4) C)Thickness of flange Boss length Diameter at small end of boss Maximum diameter at root of boss Grey cast iron integrally cast or screwed on with boss Malleable cast iron screwed on with boss Copper alloy cast or wrought integral or boss or plain (Fig. 3) Wrought steel integral or plain (Fig. 3) or boss (Fig. 4) HLPNOABET1T2T3T4 inininininininininininin 223027 11211 1 1 23243128 1211 11 161 2432 29 1211 11 1 262633 130 1611 11 272834 31 1611 11 293036 33 2011 1 3037 34 32011 1 333440 1382011 11 1 353642 402411 1 3643 412411 1 394046 1442411 1 1 424349 472811 81 4552 50 2811 21 484955 53 12811 121 1 545563 60 321 41 1 606170 67321 41 1 6667 76 73 321 42 1 7273 8379 1361 32 1 A) (H) For availability of steel pipe sizes, refer to BS EN 10216, BS EN 10217. See BS 4622 and BS 4722 for outside diameters of cast iron pipes. See BS EN 12449 for the sizes of copper pipes for use with copper alloy flanges up to 8 in bore. B) (O) For in and 5 in bolts, the diameters of the holes shall be in larger than the bolts and for 4