1、BRITISH STANDARDBS EN 10226-2:2005Pipe threads where pressure tight joints are made on the threads Part 2: Taper, external threads and taper internal threads Dimensions, tolerances and designationThe European Standard EN 10226-2:2005 has the status of a British StandardICS 21.040.30g49g50g3g38g50g51
2、g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN Incorporating corrigendum April 2016BS EN 10226-2:2005ISBN 978 0 580 93775 0Amendments/corrigenda issued since
3、publicationDate Comments30 April 2016 Supersession details in national foreword updatedThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 January 2006 The British Standards Institution 2016. Published by BSI Standards Limited 2016National for
4、ewordThis British Standard is the UK implementation of EN 10226-2:2005. Together with BS EN 10226-1 and BS EN 10226-3, it supersedes BS 21:1985.The UK participation in its preparation was entrusted to Technical Committee ISE/110, Steel Tubes, and Iron and Steel Fittings.A list of organizations repre
5、sented on this committee can be obtained on request to its secretary.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.EUROPEAN ST
6、ANDARDNORME EUROPENNEEUROPISCHE NORMEN 10226-2August 2005ICS 21.040.30English VersionPipe threads where pressure tight joints are made on thethreads - Part 2: Taper external threads and taper internalthreads - Dimensions, tolerances and designationFiletages de tuyauterie pour raccordement avec tanch
7、itdans le filet - Partie 2: Filetages extrieurs coniques etfiletages intrieurs coniques - Dimensions, tolrances etdsignationRohrgewinde fr im Gewinde dichtende Verbindungen - Teil2: Kegelige Auengewinde und kegelige Innengewinde -Mae, Toleranzen und BezeichnungThis European Standard was approved by
8、CEN on 27 June 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards ma
9、y be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Centr
10、al Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland
11、, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reser
12、vedworldwide for CEN national Members.Ref. No. EN 10226-2:2005: EEN 10226-2:2005 (E) 2 Contents Page Foreword3 1 Scope.4 2 Normative references .4 3 Terms and definitions.4 4 Symbols and explanations.6 5 Dimensions6 6 Designation .6 7 Thread design .8 7.1 Thread form.8 7.2 Thread lengths9 8 Gauging.
13、11 Bibliography.13 EN 10226-2:2005 (E) 3 Foreword This document (EN 10226-2:2005) has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes”, the secretariat of which is held by UNI/UNSIDER. This European Standard shall be given the status of a national standard,
14、 either by publication of an identical text or by endorsement, at the latest by February 2006, and conflicting national standards shall be withdrawn at the latest by February 2006. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Ass
15、ociation. This document is based, with editorial modifications on ISO 7-1 “Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation“. Pipe threads to this document are dimensionally identical to and fully interchangeable with pipe threads to I
16、SO 7-1. This document has been prepared in three parts. Parts 1 and 2 reflect the two thread jointing systems in regular use in Europe and Worldwide - Part 1 details taper external and parallel internal pipe threads, and Part 2 details taper external and taper internal pipe threads. Part 3 will prov
17、ide requirements for the gauging of pipe threads conforming to Parts 1 and 2. The common requirements for the taper external pipe thread are given in Part 1 and in Part 2, so as to present the complete thread jointing system in each part. Components having pipe threads produced to the dimensions and
18、 tolerances given in this European Standard can be assembled to give safe and effective pressure tight joints providing proper assembly techniques are used. The techniques used to assemble threaded joints are dependent on a number of factors including the internal thread (parallel or taper), the qua
19、lity of the mating threads, the materials of the components being connected, the thread sealant or jointing compound used and the assembly torque. Because of the different assembly techniques used for the taper / parallel and taper / taper systems, it is recommended that mixing of components having
20、parallel internal threads and taper internal threads is avoided in the same piping system. Relevant EN product or application standards will normally specify whether parallel and /or taper internal threads are permitted for these products or applications. Users should select the internal thread type
21、 to suit their product or application requirements. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany,
22、Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom BS EN 10226-2:2005EN 10226-2:2005 (E) 2 Contents Page Foreword3 1 Scope.4 2 Normative references .4 3 Terms and def
23、initions.4 4 Symbols and explanations.6 5 Dimensions6 6 Designation .6 7 Thread design .8 7.1 Thread form.8 7.2 Thread lengths9 8 Gauging.11 Bibliography.13 EN 10226-2:2005 (E) 3 Foreword This document (EN 10226-2:2005) has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings f
24、or steel tubes”, the secretariat of which is held by UNI/UNSIDER. 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 February 2006, and conflicting national standards shall be withdrawn at the latest
25、 by February 2006. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document is based, with editorial modifications on ISO 7-1 “Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions,
26、tolerances and designation“. Pipe threads to this document are dimensionally identical to and fully interchangeable with pipe threads to ISO 7-1. This document has been prepared in three parts. Parts 1 and 2 reflect the two thread jointing systems in regular use in Europe and Worldwide - Part 1 deta
27、ils taper external and parallel internal pipe threads, and Part 2 details taper external and taper internal pipe threads. Part 3 will provide requirements for the gauging of pipe threads conforming to Parts 1 and 2. The common requirements for the taper external pipe thread are given in Part 1 and i
28、n Part 2, so as to present the complete thread jointing system in each part. Components having pipe threads produced to the dimensions and tolerances given in this European Standard can be assembled to give safe and effective pressure tight joints providing proper assembly techniques are used. The t
29、echniques used to assemble threaded joints are dependent on a number of factors including the internal thread (parallel or taper), the quality of the mating threads, the materials of the components being connected, the thread sealant or jointing compound used and the assembly torque. Because of the
30、different assembly techniques used for the taper / parallel and taper / taper systems, it is recommended that mixing of components having parallel internal threads and taper internal threads is avoided in the same piping system. Relevant EN product or application standards will normally specify whet
31、her parallel and /or taper internal threads are permitted for these products or applications. Users should select the internal thread type to suit their product or application requirements. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following count
32、ries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerl
33、and and United Kingdom BS EN 10226-2:2005EN 10226-2:2005 (E) 4 1 Scope This European Standard specifies the requirements for thread form, dimensions, tolerances and designation for jointing pipe threads, sizes 1/16 to 6 inclusive, for joints made pressure-tight by the mating of the threads. These th
34、reads are taper external and taper internal and are intended for use with pipes suitable for threading and for valves, fittings or other pipeline equipment interconnected by threaded joints. An appropriate thread sealant or jointing compound should be used on the thread to ensure pressure-tight join
35、ts. NOTE 1 Threaded joints using taper external threads and parallel internal threads are detailed in EN 10226-1. NOTE 2 The requirements for taper external threads are identical in EN 10226-1 and EN 10226-2. NOTE 3 For pipe threads where pressure-tight joints are not made on the threads see EN ISO
36、228-1. NOTE 4 EN 10226-3 gives details of recommended gauging systems for the verification of thread dimensions and thread form. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited app
37、lies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10226-3, Pipe threads where pressure-tight joints are made on the threads Part 3: Verification by means of limit gauges 3 Terms and definitions For the purposes of this European Standar
38、d, the following terms and definitions apply (see also Figures 2 and 3). NOTE For consistency and clarity, common terms and definitions have been adopted for EN 10226-1 and EN 10226-2. Consequently some definitions may include terms that seem inappropriate to this document. 3.1 gauge diameter major
39、diameter of the thread, whether external or internal, at the gauge plane 3.2 major cone imaginary cone, which just touches the crests of a taper external thread or the roots of a taper internal thread 3.3 gauge plane plane, perpendicular to the axis of the taper thread, at which the major cone has t
40、he gauge diameter NOTE 1 For external threads the gauge plane is located at a distance equal to the gauge length from the small end of the thread. NOTE 2 For taper internal threads; the gauge plane is located at a distance of half pitch behind the face of the threaded work piece. This distance has b
41、een agreed so that the position of the gauge plane on taper internal threads is consistent with parallel internal threads in EN 10226-1. 3.4 gauge length on an external thread, the distance from the gauge plane to the small end of the thread, measured parallel to the axis EN 10226-2:2005 (E) 5 3.5 r
42、eference plane visible surface of the internally and externally threaded parts, which facilitates the reading of the gauge when the thread is inspected. For internal threads it is the face of the internally threaded part, for external threads it is the small end of the externally threaded part 3.6 c
43、omplete thread part of the thread that is fully formed at both crest and root NOTE When there is a chamfer at the start of the thread not exceeding one pitch in length, this is included in the length of the complete thread. 3.7 incomplete thread part of the thread that is fully formed at the root, b
44、ut truncated at the crest by its intersection with the cylindrical surface of the product 3.8 washout thread part of the thread that is not fully formed at the root NOTE The washout thread is produced by the bevel at the start of the threading tool. 3.9 useful thread complete thread plus incomplete
45、thread, excluding the washout thread NOTE In practice, the total length of useful external thread may be longer than is necessary depending on the production techniques used for producing the threads and the external diameter of the work piece. The provision of excessive lengths of useful external t
46、hread should be avoided. 3.10 assembly length useful thread length beyond the gauge plane of an external thread required to provide for assembly with an internal thread at the upper limit of the tolerance. It is inclusive of the wrenching length NOTE 1 See also 7.2.2. NOTE 2 This term is also known
47、as “fitting allowance“. 3.11 wrenching length useful thread length that is provided to accommodate the relative movement between the externally threaded part and the internally threaded part during the wrenching operation, following hand-tight engagement NOTE This term is also known as “wrenching al
48、lowance“. 3.12 accommodation length distance on internally threaded work pieces, from the face of the work piece to the first obstruction, which the externally threaded work piece will encounter on assembly BS EN 10226-2:2005EN 10226-2:2005 (E) 4 1 Scope This European Standard specifies the requirem
49、ents for thread form, dimensions, tolerances and designation for jointing pipe threads, sizes 1/16 to 6 inclusive, for joints made pressure-tight by the mating of the threads. These threads are taper external and taper internal and are intended for use with pipes suitable for threading and for valves, fittings or other pipeline equipment interconnected by threaded joints. An appropriate thread sealant or jointing compound should be used on the thread to ensure pressure-tight joints. NOTE 1 Threaded joints using taper external threads and parallel internal threads are
