BS 27791986 英制非密封管螺纹BSP.docx

1、BS 27791986 英制非密封管螺纹BSPBS 2779-1986 英制非密封管螺纹(BSP) 非密封管螺纹 BRITISH STANDARD BS2779:1986 Specification for Licensed Copy: AUB User, na, Sun Mar 25 13:38:08 GMT+00:00 2022, Uncontrolled Copy, (c) BSI Pipe threads for tubes and fittings where pressure-tight joints are not made on the threads (metric dime

2、nsions) UDC621.643.414:621.882.082.1 非密封管螺纹 BS2779:1986 Committees responsible for this British Standard This British Standard was entrusted by the Piping Systems Components Standards Committee (PSE/-) to Technical Committee PSE/9, upon which the following bodies were represented: British Hydromecha

3、nics Research AssociationBritish Malleable Tube Fittings AssociationBritish Steel Industry British Valve Manufacturers Association Ltd.Copper Tube Fittings Manufacturers Association Department of Trade and Industry (National Engineering Laboratory)Energy Industries Council Engineering Equipment and

4、Materials Users AssociationGauge and Tool Makers AssociationInstitution of Civil EngineersInstitution of Gas Engineers Institution of Public Health Engineers Institution of Water Engineers and ScientistsWater Authorities AssociationWater Companies Association Wrought Fitting Makers Association Licen

5、sed Copy: AUB User, na, Sun Mar 25 13:38:08 GMT+00:00 2022, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Piping Systems Components Standards Committee, was published under the authority of the Board of BSI and comes into effect on 29 August1986 BS

6、I 12-1998 First published December1956 First revision April1973 Second revision August1986The following BSI references relate to the work on this standard: Committee reference PSE/9 Draft for comment85/75381 DCISBN058015212 X Amendments issued since publication 非密封管螺纹 BS2779:1986 Contents Committees

7、 responsibleForeword Page Inside front cover ii 11455685788910111213145910111314 Licensed Copy: AUB User, na, Sun Mar 25 13:38:08 GMT+00:00 2022, Uncontrolled Copy, (c) BSI 234Symbols Classification and designationThread details thread for class A external threads Appendix B Notes on tolerancing sys

8、tem structureAppendix C Method of verification of thread size and form by means of limit gauges Appendix D Gauges for the method given in appendix C Figure 2 Special truncated external threadFigure 3 NOT GO screw calliper gaugeFigure 4 Start of complete threadFigure 5 Chamfer of start of thread Figu

9、re 6 Thread profiles of GO ring gauges and their check plugs Figure 7 Relative positions of pitch diameter tolerancezones for GO ring gauges and their check plugs Figure 8 Thread profiles of NOT GO ring gauges and their check plugs and calliper gauges Figure 9 Relative positions of pitch diameter to

10、lerance zones for NOT GO ring gauges, calliper gauges and their check plugsFigure 10 Thread profiles of Go and NOT GO plug gauges Figure 11 Relative positions of pitch diameter tolerance zones for GO and NOT GO plug gauges Table 2 Special truncated fastening threads, class A external threads Table 3

11、 Dimensions for GO and NOT GO gauges and their check plugs for class A external threads and for GO gauges and their check plugs for class B external threadsTable 4 Other values for GO and NOT GO gauges and their check plugs for class A and class B external threads as a function of the pitch, P Table

12、 5 Dimensions for NOT GO gauges and their check plugs for class B external threads Table 6 Dimensions for threaded GO and NOT GO plug gaugesTable 7 Other values for GO and NOT GO plug gauges as a function of the pitch, P BSI 12-1998 i 非密封管螺纹 BS2779:1986 Foreword This revision of BS2779 has been prep

13、ared under the direction of the Piping Systems Components Standards Committee. It supersedes BS2779:1973, which is withdrawn. This standard is based on and is technically equivalent to the two Parts of ISO228 “Pipe threads where pressure-tight joints are not made on the threads”, namely ISOonly. For

14、 ease of production, it has been found convenient to reproduce the figures from ISO228/2-1980 forFigure4,Figure5,Figure7,Figure10 andFigure11 of this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for th

15、eir correct pliance with a British Standard does not of itself confer immunity from legal obligations. Licensed Copy: AUB User, na, Sun Mar 25 13:38:08 GMT+00:00 2022, Uncontrolled Copy, (c) BSI Summary of pages This document comprises a front cover, an inside front cover pages i and ii, pages1 to14, aninside back cover and a back cover. This standerd has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover. ii BSI 12-1998 非密封管螺纹 BS2779:1986