1、BSI Standards PublicationBS EN 12732:2013+A1:2014BS EN 12732:2013Gas infrastructure Weldingsteel pipework FunctionalrequirementsBS EN 12732:2013+A1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12732:2013+A1:2014. It supersedes BS EN 12732:2013 which is w
2、ithdrawn.The UK committee voted against this standard for several reasons, particularly because of technical differences with a long established UK gas industry standard for welding procedures, BS 4515, and on the requirements for the qualification of welding personnel. Also several improvements req
3、uested by the UK gas industry stakeholders to the draft EN 12732 were not accepted. A full set of UK comments may be obtained from BSI Committee Service Centre. The UK will attempt again to have improvements made when this standard is revised. The UK committee also acknowledges that despite voting a
4、gainst this standard, it can still be used by other UK industries.The UK participation in its preparation was entrusted to Technical Committee GSE/33, Gas supply.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to inc
5、lude all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 83807 1ICS 25.160.40Compliance with a British Standard cannot confer immunity from legal obligations.This
6、British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2013.Amendments/corrigenda issued since publicationDate Text affected30 September 2014 Implementation of CEN amendment A1:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12732:2
7、013+A1 April 2014 ICS 25.160.40 Supersedes EN 12732:2013English Version Gas infrastructure - Welding steel pipework - Functional requirements Infrastructures gazires - Soudage des tuyauteries en acier - Prescriptions fonctionnelles Gasinfrastruktur - Schweien an Rohrleitungen aus Stahl - Funktionale
8、 Anforderungen This European Standard was approved by CEN on 14 March 2013 and includes Amendment 1 approved by CEN on 3 February 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national
9、standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version
10、in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
11、 Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUR
12、OPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12732:2013+A1:2
13、014 EBS EN 12732:2013+A1:2014EN 12732:2013+A1:2014 (E) 2 Contents Page Foreword 6 1 Scope 7 2 Normative references 8 3 Terms and definitions 11 4 Quality system 13 4.1 General . 13 4.2 Welding contractors . 14 4.3 Welders 15 4.4 Welding supervisory and coordination personnel 15 4.5 Testing companies
14、 and personnel 15 4.5.1 General . 15 4.5.2 Non-destructive testing (NDT) . 15 4.5.3 Destructive testing (DT) . 15 5 Welding consumables 15 6 Production welding. 16 6.1 General requirements . 16 6.1.1 General . 16 6.1.2 Working area . 16 6.1.3 Layout of weld joints 17 6.1.4 Types of weld joints . 17
15、6.1.5 Joint edge preparation . 17 6.1.6 Weld fit-up . 17 6.1.7 Different wall thickness 17 6.1.8 Pipe branches and nozzles 17 6.1.9 Laminations . 17 6.1.10 Butt welds cross joints 17 6.2 Joint preparation. 17 6.2.1 Pipe end preparation 17 6.2.2 Alignment of the joints . 17 6.3 Preheating . 18 6.4 Ta
16、cking 18 6.5 Welding 18 6.6 Actions after welding . 18 6.7 Repair of weld defects 19 7 Special procedures . 19 7.1 General . 19 7.2 Attachment of structural parts 19 7.3 Attachment of cathodic protection connections . 19 7.4 Hot-tapping and other welding work on in-service pipelines 20 8 Inspection
17、of the weld joint . 20 8.1 General . 20 8.2 Scope of inspection 20 8.3 Non-destructive testing and assessment levels . 22 8.4 Time of inspection 23 8.5 Acceptance criteria . 23 8.6 Recording of test results . 24 BS EN 12732:2013+A1:2014EN 12732:2013+A1:2014 (E) 2 Contents Page Foreword 6 1 Scope 7 2
18、 Normative references 8 3 Terms and definitions 11 4 Quality system 13 4.1 General . 13 4.2 Welding contractors . 14 4.3 Welders 15 4.4 Welding supervisory and coordination personnel 15 4.5 Testing companies and personnel 15 4.5.1 General . 15 4.5.2 Non-destructive testing (NDT) . 15 4.5.3 Destructi
19、ve testing (DT) . 15 5 Welding consumables 15 6 Production welding. 16 6.1 General requirements . 16 6.1.1 General . 16 6.1.2 Working area . 16 6.1.3 Layout of weld joints 17 6.1.4 Types of weld joints . 17 6.1.5 Joint edge preparation . 17 6.1.6 Weld fit-up . 17 6.1.7 Different wall thickness 17 6.
20、1.8 Pipe branches and nozzles 17 6.1.9 Laminations . 17 6.1.10 Butt welds cross joints 17 6.2 Joint preparation. 17 6.2.1 Pipe end preparation 17 6.2.2 Alignment of the joints . 17 6.3 Preheating . 18 6.4 Tacking 18 6.5 Welding 18 6.6 Actions after welding . 18 6.7 Repair of weld defects 19 7 Specia
21、l procedures . 19 7.1 General . 19 7.2 Attachment of structural parts 19 7.3 Attachment of cathodic protection connections . 19 7.4 Hot-tapping and other welding work on in-service pipelines 20 8 Inspection of the weld joint . 20 8.1 General . 20 8.2 Scope of inspection 20 8.3 Non-destructive testin
22、g and assessment levels . 22 8.4 Time of inspection 23 8.5 Acceptance criteria . 23 8.6 Recording of test results . 24 EN 12732:2013+A1:2014 (E) 3 9 Documentation 24 9.1 General . 24 9.2 Archiving requirements 24 10 Specific requirements for gas infrastructure with a MOP up to and including 16 bar .
23、 24 10.1 General . 24 10.2 Welders . 24 10.3 Welding supervisory personnel . 25 10.4 Production welding . 25 10.4.1 General . 25 10.4.2 Joint preparation . 25 10.4.3 Welding . 25 10.5 Requirements for records and documentation 25 11 Specific requirements for gas infrastructure with a MOP greater tha
24、n 16 bar . 26 11.1 General . 26 11.2 Welders . 26 11.3 Welding supervisory personnel . 26 11.4 Qualification of welding procedures . 26 11.4.1 General . 26 11.4.2 Filler material requirements for welding procedure qualification 26 11.4.3 Impact testing 27 11.4.4 Transverse tensile test 27 11.4.5 All
25、-weld-metal tensile test 28 11.5 Production welding . 28 11.5.1 General . 28 11.5.2 Joint preparation . 28 11.5.3 Welding . 28 11.5.4 Repairs of weld defects 29 11.5.5 Welding consumables . 29 11.6 Destructive testing of production welds . 29 11.7 Acceptance requirements. 29 11.8 Requirements for re
26、cords and documentation 30 12 Specific requirements for metering, regulating and compressor stations . 31 12.1 General . 31 12.2 Specific requirements . 31 Annex A (informative) Qualification procedure for pipeline welders (Girth welds and branch connections) 32 A.1 General . 32 A.2 Approval test 32
27、 A.2.1 Execution of the approval test . 32 A.2.2 Range of test pieces 32 A.2.3 Supervision of execution of approval test 33 A.3 Inspection . 33 A.3.1 General . 33 A.3.2 Testing girth welds 34 A.3.3 Testing weldolets 34 A.4 Approval range 34 A.4.1 General . 34 A.4.2 Dimension ranges . 34 BS EN 12732:
28、2013+A1:2014EN 12732:2013+A1:2014 (E) 4 A.4.3 Techniques 34 A.5 Certificate 35 A.5.1 General . 35 A.5.2 Duration of validity . 35 Annex B (informative) Testing of lamination defects . 36 Annex C (informative) Time-of-flight diffraction technique (TOFD) 37 C.1 General . 37 C.2 Additional and substitu
29、tional requirements to EN ISO 10863:2011 37 C.2.1 Addition to the whole document EN ISO 10863:2011 . 37 C.2.2 Addition to EN ISO 10863:2011, Clause 3 “Terms and definitions“ 37 C.2.3 Addition to EN ISO 10863:2011, Clause 5, “Examination Levels“ . 39 C.2.4 Addition to EN ISO 10863:2011, 7.2.2, “Ultra
30、sonic probes“ . 39 C.2.5 Substitution of EN ISO 10863:2011, Clause 11, 3rdparagraph “Weld testing“ . 39 C.2.6 Substitution of EN ISO 10863:2011, 12.5.2 “Sizing“ 40 Annex D (informative) Critical aspects for hot-tap welding or welding on in-service pipelines . 45 D.1 General . 45 D.2 Recommendations
31、45 D.2.1 Equipment . 45 D.2.2 Supervision . 45 D.2.3 Safety precautions 45 D.2.4 Identification 45 D.2.5 Filler materials . 45 D.3 Weld preparation. 46 D.4 Welding procedure specification (WPS) 46 D.4.1 Description of the WPS 46 D.4.2 Qualification of the WPS 46 D.4.3 Approval of the WPS 46 D.5 Qual
32、ification of the welder . 46 D.6 Precautions . 46 D.7 Execution . 47 D.8 Repairs . 47 D.9 WPS qualification record . 47 Annex E (informative) Visual examination of joints 49 E.1 General . 49 E.2 Recommendations 49 Annex F (informative) Manual ultrasonic testing of weld joints for wall thickness betw
33、een approximately 6 mm and 8 mm . 50 F.1 General . 50 BS EN 12732:2013+A1:2014EN 12732:2013+A1:2014 (E) 4 A.4.3 Techniques 34 A.5 Certificate 35 A.5.1 General . 35 A.5.2 Duration of validity . 35 Annex B (informative) Testing of lamination defects . 36 Annex C (informative) Time-of-flight diffractio
34、n technique (TOFD) 37 C.1 General . 37 C.2 Additional and substitutional requirements to EN ISO 10863:2011 37 C.2.1 Addition to the whole document EN ISO 10863:2011 . 37 C.2.2 Addition to EN ISO 10863:2011, Clause 3 “Terms and definitions“ 37 C.2.3 Addition to EN ISO 10863:2011, Clause 5, “Examinati
35、on Levels“ . 39 C.2.4 Addition to EN ISO 10863:2011, 7.2.2, “Ultrasonic probes“ . 39 C.2.5 Substitution of EN ISO 10863:2011, Clause 11, 3rdparagraph “Weld testing“ . 39 C.2.6 Substitution of EN ISO 10863:2011, 12.5.2 “Sizing“ 40 Annex D (informative) Critical aspects for hot-tap welding or welding
36、on in-service pipelines . 45 D.1 General . 45 D.2 Recommendations 45 D.2.1 Equipment . 45 D.2.2 Supervision . 45 D.2.3 Safety precautions 45 D.2.4 Identification 45 D.2.5 Filler materials . 45 D.3 Weld preparation. 46 D.4 Welding procedure specification (WPS) 46 D.4.1 Description of the WPS 46 D.4.2
37、 Qualification of the WPS 46 D.4.3 Approval of the WPS 46 D.5 Qualification of the welder . 46 D.6 Precautions . 46 D.7 Execution . 47 D.8 Repairs . 47 D.9 WPS qualification record . 47 Annex E (informative) Visual examination of joints 49 E.1 General . 49 E.2 Recommendations 49 Annex F (informative
38、) Manual ultrasonic testing of weld joints for wall thickness between approximately 6 mm and 8 mm . 50 F.1 General . 50 EN 12732:2013+A1:2014 (E) 5 F.2 Setting . 50 F.2.1 Setting of range . 50 F.2.2 Sensitivity adjustment when using the Distance Gain Size method . 50 Annex G (normative) Acceptance c
39、riteria - Recommendations for on-site production welds . 54 G.1 General . 54 G.2 Acceptance criteria according to EN ISO 5817 54 G.3 Summary of requirements for defect acceptance levels and defect limits . 57 G.3.1 General . 57 G.3.2 Requirements . 58 G.4 Method and acceptance criteria for ultrasoni
40、c inspection assessment 65 G.4.1 Distance Gain Size method 65 G.4.2 Comparative Element method 65 G.4.3 General . 65 G.4.4 Assessment of indications using automatic pulse-echo technique 67 Annex H (informative) Brazing and aluminothermic welding of leads for cathodic protection systems 68 H.1 Joinin
41、g techniques 68 H.2 Procedure qualification . 68 H.3 Operation qualification . 70 H.4 Production joints . 70 Annex I (informative) Significant technical changes between this European Standard and the previous edition . 71 Bibliography 72 BS EN 12732:2013+A1:2014EN 12732:2013+A1:2014 (E) 6 Foreword T
42、his document (EN 12732:2013+A1:2014) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure”, the secretariat of which is held by DIN. 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
43、 by October 2014, and conflicting national standards shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all suc
44、h patent rights. This document supersedes !EN 12732:2013“. This document includes Amendment 1 approved by CEN on 2014-02-03. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. This European Standard has been prepared under mandate M/017 given to CEN
45、by the Commission of the European Communities and the European Free Trade Association. Annex I provides details of significant technical changes between this European Standard and the previous edition. There is a complete suite of functional standards prepared by CEN/TC 234 ”Gas infrastructure“ to c
46、over all parts from the input of gas to the transmission system up to the inlet connection of the gas appliances, whether for domestic, commercial or industrial purposes. In preparing this standard a basic understanding of gas infrastructure by the user has been assumed. Gas infrastructure is comple
47、x and the importance on safety of its construction and use has led to the development of very detailed codes of practice and operating manuals in the member countries. These detailed statements embrace recognised standards of gas engineering and the specific requirements imposed by the legal structu
48、res of the member countries. CEN/TC 234 will continue its work updating this standard to the latest developments at regular intervals. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aus
49、tria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12732:2013+A1:2014EN 12732:2013+A1:2014 (E) 6 Foreword This document (EN 12732:2013+A1:2014) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure”, the secretariat of which is held by DIN. This European Stand
