1、July 2014 Translation by DIN-Sprachendienst.English price group 23No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 2
2、5.160.40!%2s“2159580www.din.deDDIN EN 12732Gas infrastructure Welding steel pipework Functional requirements;English version EN 12732:2013+A1:2014,English translation of DIN EN 12732:2014-07Gasinfrastruktur Schweien an Rohrleitungen aus Stahl Funktionale Anforderungen;Englische Fassung EN 12732:2013
3、+A1:2014,Englische bersetzung von DIN EN 12732:2014-07Infrastructures gazires Soudage des tuyauteries en acier Prescriptions fonctionnelles;Version anglaise EN 12732:2013+A1:2014,Traduction anglaise de DIN EN 12732:2014-07SupersedesDIN EN 12732:2013-07www.beuth.deIn case of doubt, the German-languag
4、e original shall be considered authoritative.Document comprises 74 pages 05.14 DIN EN 12732:2014-07 2 A comma is used as the decimal marker. National foreword This document (EN 12732:2013+A1:2014) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure” (Secretariat: DIN, Germany), I
5、t includes Amendment A1 approved by CEN on 3 February 2014. The responsible German bodies involved in its preparation were the Normenausschuss Gastechnik (Gas Technology Standards Committee), Working Committees NA 032-02-01 AA Gastransportleitungen and NA 032-02-08 AA Werkstoffe und Schweitechnik an
6、d the Normenausschuss Schweien und verwandte Verfahren (Welding and Allied Processes Standards Committee). In the current edition of EN 12732, reference is made to two standards in the EN ISO/IEC 17000 family of standards as regards non-destructive (NDT) or destructive (DT) testing. During the prepa
7、ration of EN 12732 it became clear that the national accreditation bodies interpret the scope of EN ISO/IEC 17025 very differently. This discrepancy has been corrected in the present document. A more detailed technical rule within the meaning of the scope of this standard is the DVGW-Arbeitsblatt GW
8、 350. The other standards prepared by CEN/TC 234 are also supplemented by DVGW-Arbeitsbltter. This standard has been included in the body of technical rules and standards for gas issued by the DVGW Deutscher Verein des Gas- und Wasserfaches e.V. (German Technical and Scientific Association for Gas a
9、nd Water). Amendments This standard differs from DIN EN 12732:2013-07 as follows: a) 4.5 “Testing companies and personnel” has been modified; b) the reference standard in C.2.3 has been corrected. Previous editions DIN 8564-1: 1972-04 DIN EN 12732: 2000-09, 2013-07 EUROPEAN STANDARD NORME EUROPENNE
10、EUROPISCHE NORM EN 12732:2013+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 Rohrleitung
11、en aus Stahl - Funktionale 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
12、 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, F
13、rench, 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgar
14、ia, 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, Turk
15、ey and United Kingdom. EUROPEAN 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. R
16、ef. No. EN 12732:2013+A1:2014 EEN 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 compani
17、es 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 . 1
18、7 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
19、Tacking 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 Inspectio
20、n 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 DINEN 12732:2014-07EN 12732:2013+A1:2014 (E) 3 9 Documentation 24 9.1 General . 24 9.2
21、 Archiving requirements 24 10 Specific requirements for gas infrastructure with a MOP up to and including 16 bar . 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 Re
22、quirements for records and documentation 25 11 Specific requirements for gas infrastructure with a MOP greater than 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 require
23、ments for welding procedure qualification 26 11.4.3 Impact testing 27 11.4.4 Transverse tensile test 27 11.4.5 All-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 consumable
24、s . 29 11.6 Destructive testing of production welds . 29 11.7 Acceptance requirements. 29 11.8 Requirements for records 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) Qualific
25、ation procedure for pipeline welders (Girth welds and branch connections) 32 A.1 General . 32 A.2 Approval test 32 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 wel
26、ds 34 A.3.3 Testing weldolets 34 A.4 Approval range 34 A.4.1 General . 34 A.4.2 Dimension ranges . 34 DINEN 12732:2014-07EN 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 Anne
27、x C (informative) Time-of-flight diffraction 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
28、 to EN ISO 10863:2011, Clause 5, “Examination 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) Criti
29、cal aspects for hot-tap welding or welding 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 (WP
30、S) 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 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
31、E.2 Recommendations 49 Annex F (informative) Manual ultrasonic testing of weld joints for wall thickness between approximately 6 mm and 8 mm . 50 F.1 General . 50 DINEN 12732:2014-07EN 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 D
32、istance Gain Size method . 50 Annex G (normative) Acceptance criteria - 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 Requ
33、irements . 58 G.4 Method and acceptance criteria for ultrasonic 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
34、welding of leads for cathodic protection systems 68 H.1 Joining 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
35、DINEN 12732:2014-07EN 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 Standard shall be given the status of a national standard, either by publicat
36、ion of an identical text or by endorsement, at the latest 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 sha
37、ll not be held responsible for identifying any or all such 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 Sta
38、ndard has been prepared under mandate M/017 given to CEN 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 s
39、tandards prepared by CEN/TC 234 ”Gas infrastructure“ to cover 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 b
40、y the user has been assumed. Gas infrastructure is complex 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 a
41、nd the specific requirements imposed by the legal structures 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 cou
42、ntries are bound to implement this European Standard: Austria, 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, P
43、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DINEN 12732:2014-07EN 12732:2013+A1:2014 (E) 7 1 Scope This European Standard contains requirements for the production and testing of weld joints for the installation and modification of onshore
44、steel pipelines and pipework used in gas infrastructure, including in-service pipelines, for all pressure ranges for the carriage of processed, non-toxic and non-corrosive natural gas according to EN ISO 13686 and for the carriage of non-conventional gases such as injected biomethane, where the pipe
45、line elements are made of unalloyed or low-alloyed carbon steel; the pipeline is not located within commercial or industrial premises as integral part of the industrial process on those premises except for any pipelines and facilities delivering gas to such premises; the pipework is not located with
46、in household installations according to EN 1775; the design temperature of the system is between -40 C up to and including 120 C. The onshore steel pipelines and pipework used in gas infrastructure include in-service pipelines, for all pressure ranges for the carriage of processed, non-toxic and non
47、-corrosive natural gas according to EN ISO 13686 and for the carriage of non-conventional gases complying with EN ISO 13686, and for which a detailed technical evaluation of the functional requirements (such as injected biomethane) is performed ensuring there are no other constituents or properties
48、of the gases that can affect the integrity of the pipeline. This standard is not applicable to welds produced prior to the publication of this European Standard. Table 1 assigns the application areas to quality requirement categories as a function of the working pressure and pipe materials used. Table 1 Allocation to quality requirement categories Quality requirement category Area of activity applies to B Pressure range and base material 5 bar Group 1.1, 1.2 and 1.4 according to CEN ISO/TR 15608 Rt 0,5 360 N/mm2Examples of use: Ma
