BS 1560-3.3-1989 管道 阀门和管件用圆法兰(特定类别).钢、铸铁和铜合金法兰第3节铜合金和复合法兰规范.pdf

BRITISH STANDARD BS 1560-3.3 1989 Circular flanges for pipes, valves and fittings Class designated Part 3 Steel, cast iron and copper alloy flanges Section 3.3 Specification for copper alloy and composite flanges UDC 621.643.4 – 034.14621.643.411.412.8669.35620.168001.4006.3/.8 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Jul 30 104446 BST 2006, Uncontrolled Copy, c BSI BS 1560-3.31989 This British Standard, having been prepared under the direction of the Piping Systems Components Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 30 June 1989 BSI 01-2000 First published as BS 1560-2 November 1970 First revision as BS 1560-3.3 June 1989 The following BSI references relate to the work on this standard Committee reference PSE/15 Draft for comment 87/72072 DC ISBN 0 580 17047 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Piping Systems Components Standards Policy Committee PSE/- to Technical Committee PSE/15, upon which the following bodies were represented British Chemical Engineering Contractors’ Association British Compressed Gases Association British Fluid Power Association British Foundry Association British Gas plc British Malleable Tube Fittings Association British Maritime Technology British Non-Ferrous Metals Federation British Pump Manufacturers’ Association British Steel Industry British Valve and Actuator Manufacturers’ Association Ltd. Combustion Engineering Association Copper Development Association Department of Trade and Industry National Engineering Laboratory Ductile Iron Producers’ Association Electricity Supply Industry in England and Wales Energy Industries Council Engineering Equipment and Materials Users’ Association GAMBICA BEAMA Ltd. High Pressure Pipework Consultative Committee Institution of Gas Engineers Institution of Mechanical Engineers Institution of Production Engineers Institution of Water and Environmental Management IWEM Water Authorities Association Amendments issued since publication Amd. No.Date of issueComments Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Jul 30 104446 BST 2006, Uncontrolled Copy, c BSI BS 1560-3.31989 BSI 01-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Ranges of nominal sizes1 3Class designations and pressure/temperature ratings1 4Materials1 5Bolting2 6Dimensions2 7Flange facings2 8Facing finishes2 9Spot facing or back facing of flanges2 10Tolerances2 11Marking3 Appendix A Ination to be supplied by the purchaser15 Appendix B Application and installation15 Appendix C Use of metric bolting in lieu of inch bolting15 Figure 1 Flange codes4 Figure 2 Dimensions of Class 150 flanges8 Figure 3 Dimensions of Class 300 flanges10 Table 1 Types of copper alloy and composite flanges1 Table 2 Synoptic table5 Table 3 Copper alloy materials7 Table 4 Steel materials for composite and clad blank flanges7 Table 5 Surface finish of flange faces7 Table 6 Dimensions of Class 150 flanges9 Table 7 Dimensions of Class 300 flanges11 Table 8 Tolerances12 Table 9 Pressure/temperature ratings for copper alloys other than AB2 and CN 10714 Table 10 Pressure/temperature ratings for copper alloys AB2 and CN 10714 Table 11 Pressure/temperature ratings for all copper alloy large size flanges14 Table 12 Nominal bolt diameter15 Table 13 Inch/metric bolt comparisons15 Publications referred toInside back cover Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Jul 30 104446 BST 2006, Uncontrolled Copy, c BSI BS 1560-3.31989 ii BSI 01-2000 Foreword This Section of BS 1560 has been prepared under the direction of the Piping Systems Components Standards Policy Committee and constitutes a new Section of BS 1560 for Class designated copper alloy and composite flanges. For PN designated copper alloy and composite flanges reference should be made to BS 4504-3.3. This Section of BS 1560 is related to ISO 7005-3 published by the International Organization for Standardization ISO in respect of flanges having nominal pressures PN 20 and PN 50 covered by the International Standard. The types of flanges and their size ranges are limited when compared to those flanges of the equivalent nominal pressure given in ISO 7005-3. The PN 6, PN 10, PN 16, PN 25 and PN 40 flanges given in ISO 7005-3 are related to PN designated flanges specified in BS 4504-3.3. To align with the at of ISO 7005, BS 1560-3 is published in three Sections. Section 3.1 Specification for steel flanges; Section 3.2 Specification for cast iron flanges1; Section 3.3 Specification for copper alloy and composite flanges; This Section of BS 1560 specifies copper alloy and composite flanges which have compatible mating dimensions with steel flanges complying with BS 1560-3.1. In addition ANSI B16.24 published by the American National Standards Institute has been taken into account together with ISO 7005-3. Until such time as all three parts of ISO 7005 are published and this Section of BS 1560 is revised, this Section of BS 1560 specifies flanges having inch bolt sizes and bolt holes as specified in BS 1560-3.1. The flanges specified, with the exception of integral code 321 flanges, are for attachment to copper or copper alloy tubes complying with BS 2871. The principles adopted in the preparation of this Section of BS 1560 are in accordance with the following. a Dimensions, other than mating dimensions, are based on ISO 7005-3 for PN 20 Class 150 and PN 50 Class 300 flanges. b Mating dimensions, including outside diameters, pitch circle diameters, bolt holes and bolt sizes, comply with BS 1560-3.1. c Tolerances are generally in accordance with ISO 7005-3. d Pressure/temperature ratings are in accordance with ISO 7005-3. e Surface finish and spot facing or back facing are in accordance with ISO 7005-3. f Flanges have been additionally designated by code numbers to maintain harmonization with BS 4504-3.3 and BS 1560-3.1 which are based on the principles agreed internationally for designating flanges by type numbers. It should be noted that the thicknesses of code 305 blank flanges have nominal thicknesses different to those specified in the related specification ANSI B16.24; the thicknesses specified in ANSI B16.24 are minimum values. Guidance notes and recommendations have been included in Appendix B. Appendix B is not intended to be exhaustive. The various gasket types, dimensions, design characteristics and materials are outside the scope of this Section of BS 1560. For dimensions of gaskets reference should be made to BS 3381 for spiral wound gaskets and to BS 7076-1, BS 7076-3 and BS 7076-4 for other types of gaskets. 1 In preparation. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Jul 30 104446 BST 2006, Uncontrolled Copy, c BSI BS 1560-3.31989 BSI 01-2000iii This standard specifies inch bolting only and the use of metric bolting is outside the scope of this Section of BS 1560. However, for ination Appendix C gives the proposed metric bolt sizes to be used in lieu of the inch sizes specified. Users of metric bolting should note that bolt hole clearances may be reduced or increased. Assessed capability. Users of this Section of BS 1560 are advised to consider the desirability of assessment and registration of a supplier’s quality systems against the appropriate Part of BS 5750 by a third party certification body. NOTEFor the purposes of this Section of BS 1560 no difference is intended in the meaning between pipe and tube although idiomatic use prefers sometimes the one and sometimes the other. A British Standard does not purport to include all the necessary provisions 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, pages i to iv, pages 1 to 16, an inside 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. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Jul 30 104446 BST 2006, Uncontrolled Copy, c BSI iv blank Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Jul 30 104446 BST 2006, Uncontrolled Copy, c BSI BS 1560-3.31989 BSI 01-20001 1 Scope This Section of BS 1560 specifies requirements for Class designated circular copper alloy and composite flanges in Class 150 and Class 300 ratings and in nominal sizes up to 36 in of the type given in Table 1. Table 1 Types of copper alloy and composite flanges This Section of BS 1560 specifies the types of flanges and their facings, dimensions, tolerances, bolt sizes, flange face surface finish, marking, materials for bolting and flange materials together with their associated pressure/temperature ratings. NOTE 1Details of the tube stops used in conjunction with code 314 flanges are outside the scope of this Section of BS 1560. NOTE 2To assist purchasers Appendix A lists ination which should be supplied when ordering flanges. NOTE 3The routine inspection and pressure testing are outside the scope of this Section of BS 1560 but some guidance is given in Appendix B. NOTE 4The titles of the publications referred to in this standard are listed on the inside back cover. 2 Ranges of nominal sizes The ranges of nominal sizes from “ in to 36 in applicable to each flange code and for each Class designation shall be as given in Table 2, Table 6 and Table 7. 3 Class designations and pressure/temperature ratings 3.1 Class designations The Class designation of flanges shall be either a Class 150, or b Class 300. 3.2 Pressure/temperature ratings The pressure/temperature ratings of flanges manufactured from the materials specified in Table 3 shall be as given in Table 9, Table 10 and Table 11 for the applicable materials and shall be the maximum allowable non-shock working gauge pressure at the temperatures shown. NOTE 1Linear interpolation is permitted for intermediate temperatures. The relevant pressures and temperatures are those of the fluid in the pipe or fitting. NOTE 2The rating of flanges is not necessarily the rating of the whole pipework system. Gasket materials can also impose limitations on the pressure/temperature rating of a flanged joint and the gasket manufacturer should be consulted when selecting the material of the gasket. 3.3 Rating of flanged joints If two flanges in a flanged joint do not have the same pressure/temperature rating, the maximum permissible working pressure of the joint at any temperature shall not exceed the lower of the two flange ratings. 4 Materials 4.1 Flange materials Copper alloy components of flanges shall be manufactured from the materials given in Table 3 and steel components of flanges shall be manufactured from the materials given in Table 4. NOTE 1Where there is an appropriate application standard it is the responsibility of the purchaser to ensure that the requirements of that standard are met. NOTE 2If a protective coating such as zinc coating or painting on steel components is required, the purchaser should state the requirements on the enquiry and/or order see Appendix A. Code no.aDescription 301Plate flange in copper alloy for brazing or welding 304Loose flange in steel with a weld-neck collar in copper alloy for welding 305Blank flange in copper alloy or in steel clad with the jointing face in copper alloy 307Loose flange in steel with a slip-on collar in copper alloy for brazing or welding 311Weld-neck flange in copper alloy for welding 312Hubbed slip-on flange in copper alloy for brazing or welding 314Hubbed slip-on flange in copper alloy supplied with tube stops for brazing or welding 321Integral flange in copper alloy as part of some other equipment or component NOTE 1Figure 1 illustrates flanges according to description and code numbers. NOTE 2Flanges may be designated by description or code numbers. a Code numbers have been made non-consecutive to permit possible future additions. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Jul 30 104446 BST 2006, Uncontrolled Copy, c BSI BS 1560-3.31989 2 BSI 01-2000 4.2 Bolting materials Materials for bolting shall be as follows a materials specified in BS 1768, BS 1769 and BS 4882 inch; b materials specified in ASTM A193 and ASTM A194; c BS 2872 and BS 2874, grades CA 104 and CA 105; d proprietary high strength cupro-nickel alloys. 5 Bolting 5.1 Bolt sizes shall be as given in Table 6 and Table 7, as appropriate. 5.2 Studbolts shall comply with BS 4882 except that shown in Figure 3b of BS 48821978 shall apply only to studbolts of material other than alloy steel. 5.3 The mating surfaces of all bolt heads and nuts shall be full faced. 6 Dimensions 6.1 Flange dimensions Flanges shall have the dimensions appropriate to their nominal sizes, types and Class designations as given in Table 6 and Table 7 and clause 9, if appropriate. NOTEA summary of the various types of flanges specified showing the nominal sizes applicable to each type and to each Class is given in Table 2. 6.2 Tube sizes Dimensions of flanges shall be compatible with the tube sizes given in Table 6 and Table 7. NOTEAlternative values are specified for tube outside diameters for 10 in DN 250 and it is therefore essential that the purchaser should specify the tube size for which the flange is required see Appendix A. 6.3 Hubs The hub of hubbed slip-on copper alloy flanges code 312 and hubbed slip-on copper alloy flanges with tube stops code 314 shall be either a parallel; or b have a draft angle of not more than 4 on the outside surface for forging or casting purposes. 6.4 Bolt holes Bolt holes shall be equally spaced on the pitch circle diameter, and in the case of integral flanges, shall be positioned off-centre. 7 Flange facings Plate flanges code 301, copper alloy unclad flanges code 305, copper alloy weld-neck flanges code 311, hubbed slip-on flanges code 312, hubbed slip-on flanges supplied with tube stops code 314 and integral flanges code 321 shall be supplied with flat faces for use with full face gaskets. NOTEWhen codes 301, 305 unclad, 311, 312, 314 and 321 flanges are required to be bolted to existing raised face type steel or cast iron flanges, then the raised face on the steel or iron flange should be removed. 8 Facing finishes 8.1 All flange jointing faces shall be machine finished and when compared by visual or tactile means with reference specimens, the surface finish shall comply with the values given in Table 5.