《BS-EN-ISO-228-1-2003.pdf》由会员分享，可在线阅读，更多相关《BS-EN-ISO-228-1-2003.pdf（18页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN ISO 228-1:2003 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation The European Standard EN ISO 228-1:2003 has the status of a British Standard ICS 21.040.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 1
2、8 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 228-1:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 26 February 2003 BSI 26 February 2003 ISBN 0 580 41320 9 National foreword This British Standard is the official Englis
3、h language version of EN ISO 228-1:2003. It is identical with ISO 228-1:2000. Together with BS EN ISO 228-2:2003, it supersedes BS 2779:1986 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/19, Ferrous pipe fittings (excluding cast iron), which has
4、 the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section en
5、titled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Complia
6、nce with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related i
7、nternational and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 8, an inside back cover and a back cove
8、r. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUR
9、OPISCHE NORM EN ISO 228-1 February 2003 ICS 21.040.30 English version Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) Filetages de tuyauterie pour raccordement sans tanchit dans le filet - Partie 1: Dimensions, to
10、lrances et dsignation (ISO 228-1:2000) Rohrgewinde fr nicht im Gewinde dichtende Verbindungen - Teil 1: Mae, Toleranzen und Bezeichnung (ISO 228- 1:2000) This European Standard was approved by CEN on 15 November 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which st
11、ipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard e
12、xists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bo
13、dies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATI
14、ON EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 228-1:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00
15、 2006, Uncontrolled Copy, (c) BSI Foreword The text of ISO 228-1:2000 has been prepared by Technical Committee ISO/TC 5 “Ferrous metal pipes and metallic fittings“ of the International Organization for Standardization (ISO) and has been taken over as EN ISO 228-1:2003 by Technical Committee ECISS/TC
16、 29 “Steel tubes and fittings for steel tubes“, the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2003, and conflicting national standards shall be wi
17、thdrawn at the latest by August 2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Irela
18、nd, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 228-1:2000 has been approved by CEN as EN ISO 228-1:2003 without any modifications. EN ISO 2281:2003 Licensed Copy: sheffieldun sheffieldun, na
19、, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 228-1:2000(E) INTERNATIONAL STANDARD ISO 228-1 Fourth edition 2000-09-01 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation Filetages de tuyauterie p
20、our raccordement sans tanchit dans le filet Partie 1: Dimensions, tolrances et dsignation EN ISO 2281:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii EN ISO 2281:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GM
21、T+00:00 2006, Uncontrolled Copy, (c) BSI iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each memb
22、er body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Ele
23、ctrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for votin
24、g. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 228 may be the subject of patent rights. ISO shall not be held responsible for identifying any or al
25、l such patent rights. International Standard ISO 228-1 was prepared by Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 5, Threaded or plain end butt-welding fittings, threads, gauging of threads. This fourth edition cancels and replaces the third edition (ISO
26、 228-1:1994), which has been technically revised. ISO 228 consists of the following parts, under the general title Pipe threads where pressure-tight joints are not made on the threads: Part 1: Dimensions, tolerances and designation Part 2: Verification by means of limit gauges Annex A of this part o
27、f ISO 228 is for information only. EN ISO 2281:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADRISO -8221:(0
28、002)E 1 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation 1Scope This part of ISO 228 specifies the requirements for thread form, dimensions, tolerances and designation for fastening pipe threads, thread sizes 1/16 to 6 inclusive. Bot
29、h internal and external threads are parallel threads, intended for the mechanical assembly of the component parts of fittings, cocks and valves, accessories, etc. These threads are not suitable as jointing threads where a pressure-tight joint is made on the thread. If assemblies with such threads mu
30、st be made pressure-tight, this should be effected by compressing two tightening surfaces outside the threads, and by interposing an appropriate seal. NOTE 1For pipe threads where pressure-tight joints are made on the threads, see ISO 7-1. NOTE 2ISO 228-2 gives details of methods for verification of
31、 fastening thread dimensions and form, and recommended gauging systems. 2Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this part of ISO 228. For dated references, subsequent amendments to, or revisions of, any
32、 of these publications do not apply. However, parties to agreements based on this part of ISO 228 are encouraged to investigate the possibility of applying the most recent editions of the normative document indicated below. For undated references, the latest edition of the normative document referre
33、d to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation. EN ISO 2281:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 1
34、3:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 3Symbols For the purposes of this part of ISO 228, the following symbols apply. ATighter class of tolerance of external pipe threads where pressure-tight joints are not made on the threads BWider class of tolerance of external pipe threads where p
35、ressure-tight joints are not made on the threads D= d; major diameter of the internal thread D1= D 1,280 654 P = d1; minor diameter of the internal thread D2= D 0,640 327 P = d2; pitch diameter of the internal thread dMajor diameter of the external thread d1= d 1,280 654 P; minor diameter of the ext
36、ernal thread d2= d 0,640 327 P; pitch diameter of the external thread GPipe thread where pressure-tight joints are not made on the threads HHeight of the fundamental triangle of the thread hHeight of the thread profile with rounded crests and roots PPitch rRadius of rounded crests and roots TD1Toler
37、ance on the minor diameter of the internal thread TD2Tolerance on the pitch diameter of the internal thread TdTolerance on the major diameter of the external thread Td2Tolerance on the pitch diameter of the external thread 4Dimensions The profile of these threads is identical with that of the parall
38、el thread specified in ISO 7-1. The internal and external threads covered by this part of ISO 228 are both parallel. Unless otherwise specified, the thread in accordance with this part of ISO 228 is a right-hand thread. (See also clause 5.) Threads are normally of the truncated form, with crests tru
39、ncated to the limits of tolerance as given in columns 14 and 15 of Table 1. The exception to this is on internal threads, where they are likely to be assembled with external threads in accordance with ISO 7-1, and in which case the thread length shall be equal to or greater than that specified in IS
40、O 7-1. The tolerances on the pitch diameter of the internal threads correspond to the positive deviation of the diameter tolerances in ISO 7-1, with the exception of those for thread sizes 1/16, 1/8, 1/4 and 3/8, for which slightly higher values are specified. EN ISO 2281:2003 Licensed Copy: sheffie
41、ldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 For external threads, two classes of tolerances on the pitch diameter are specified (see Table 1). ?Class A (column 10) consists of entirely negative tolerances, each equivalent in value to the tolerance for the r
42、espective internal thread. ?Class B (column 11) consists of entirely negative tolerances, each with a value of twice that of the respective internal thread. The choice between class A and class B depends on the conditions of application and shall be made in product standards where threads in accorda
43、nce with this part of ISO 228 are specified. Pipe thread dimensions, in millimetres, are given in Table 1. EN ISO 2281:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 ISO 2000 All rights reserved Figure 1 shows fastening threads with
44、full-form profiles and their tolerance zones. Key 1Internal thread 2External thread 3Fundamental triangle a H = 0,960491 P b h = 0,640327 P c r = 0,137329 P Figure 1 Full-form thread profile and tolerance zones Figure 2 shows fastening threads with truncated profiles and their tolerance zones. Key 1
45、Internal thread 2External thread 3Fundamental triangle a H = 0,960491 P b h = 0,640327 P c r = 0,137329 P Figure 2 Truncated-form thread profile and tolerance zones EN ISO 2281:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 13:17:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 Table 1 T
46、hread dimensions Dimensions in millimetres Tolerances on pitch diametera) Tolerance on minor diameter Tolerance on major diameter Diameters Internal thread TD2 External thread Td2 Internal thread TD1 External thread Td Pitch Height of thread majorpitchminor Lower deviation Upper deviation Lower devi
47、ation Lower deviation Upper deviation Lower deviation Upper deviation Lower deviation Upper deviation Desig- nation of thread Number of threads in 25,4 mm Phd = Dd2= D2d1= D1Class AClass B 12345678910111213141516 1/16280,9070,5817,7237,1426,5610+ 0,107 0,107 0,21400+ 0,282 0,2140 1/8280,9070,5819,72
48、89,1478,5660+ 0,107 0,107 0,21400+ 0,282 0,2140 1/4191,3370,85613,15712,30111,4450+ 0,125 0,125 0,25000+ 0,445 0,2500 3/8191,3370,85616,66215,80614,9500+ 0,125 0,125 0,25000+ 0,445 0,2500 1/2141,8141,16220,95519,79318,6310+ 0,142 0,142 0,28400+ 0,541 0,2840 5/8141,8141,16222,91121,74920,5870+ 0,142
49、0,142 0,28400+ 0,541 0,2840 3/4141,8141,16226,44125,27924,1170+ 0,142 0,142 0,28400+ 0,541 0,2840 7/8141,8141,16230,20129,03927,8770+ 0,142 0,142 0,28400+ 0,541 0,2840 1112,3091,47933,24931,77030,2910+ 0,180 0,180 0,36000+ 0,640 0,3600 1 1/8112,3091,47937,89736,41834,9390+ 0,180 0,180 0,36000+ 0,640 0,3600 1 1/4112,3091,47941,91040,43138,9520+ 0,180 0,180 0,36000+ 0,640 0,3600 1 1/2112,3091,47947,80346,32444,8450+ 0,180 0,180 0,3