ISO INTERNATIONAL STANDARD 13847 Second edition 2013-12-15 Petroleum and natural gas industries Pipeline transportation systems Welding of pipelines Industries du pétrole et du gaz naturel - Conduites pour systemes de transport - Soudage des conduites Reference number ISO 13847:2013(E) ISO Copyright intematioal Organizatin for Standardizatin @IS02013 Not for Resale IS0 13847:2013(E) COPYRIGHTPROTECTEDDOCUMENT @IS02013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved or networking permited without license from IHS Not for Resale IS0 13847:2013(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols and abbreviated terms 4.1 Symbols .5 4.2 Abbreviated terms ..5 5 Compliance ..6 6 Information to be supplied by the company ..6 7 Welding procedure specification and qualification requirements 7.1 General ..8 7.2 Welding procedure specification. .9 7.3 Welding of test piece. .9 7.4 Inspection and testing of test pieces. ..10 7.5 Re-testing. ..18 7.6 Essential variables and range of approval 19 7.7 WPS for repair welding. .23 7.8 Period of validity.. 24 8 Approval and testing of welders and welding operators .25 8.1 General 25 8.2 Approval for manual and semi-automatic welding 25 8.3 Approval for mechanized welding. 25 8.4 Approval for automatic welding 25 8.5 Test welding. 25 8.6 Inspection and testing of test welds 26 8.7 Re-testing. 27 8.8 Range of approval. 27 8.9 Records. .28 8.10 Period of validity 28 Production welding 9 .28 9.1 General. 28 9.2 Equipment 28 9.3 Working clearance 28 9.4 Weather conditions.. .29 9.5 Pipe end preparation 29 9.6 Support. 29 9.7 Line-up 29 9.8 Tack welding 30 9.9 Earthing or grounding 30 9.10 Electrodes and filler materials 30 9.11 Shielding gases 30 9.12 Preheating. 31 9.13 Arc strikes .31 9.14 Backing. 31 9.15 Internal weld bead. .32 9.16 Weld metal deposition 32 9.17 Weld cleaning and peening. 32 9.18 Partially completed welds 32 9.19 Post-weld heat treatment. 33 9.20 Pipe and weld record 34 ii ded by IHS under lic cense with ISt ed without license from IHS Not for Resale IS0 13847:2013(E) 10 Non-destructive testing 34 10.1 General. 34 10.2 NDT personnel. 34 10.3 NDT procedure approval 34 10.4 Visual examination 34 10.5 Radiographic testing 35 10.6 Ultrasonic testing. 37 10.7 Magnetic particle testing 38 10.8 Liquid penetrant testing 39 10.9 NDT report. 39 11 Acceptance criteria for non-destructive testing 39 11.1 General 39 11.2 Right of rejection 39 11.3 Visual testing 39 11.4 Radiographic testing 40 11.5 Ultrasonic testing 42 11.6 Surface testing 43 11.7 Discontinuities in pipe or fittings 43 11.8 Acceptance criteria ECA 43 12 Repair and removal of defects 43 12.1 General 43 12.2 Authorization for repair 44 12.3 Multiple repairs. 44 12.4 Defect removal and preparation for repair 44 13 Documentation .44 Annex A (informative) Special requirements for welding of CRA pipelines and CRA-clad steel pipelines .46 Annex B (informative) Hyperbaric welding 48 Annex C (informative) Recommendations for brazing and aluminothermic welding of anode leads .50 Annex D (informative) Branch and fillet welding on in-service pipelines .51 Annex E (informative) Welding of European onshore natural gas transmission pipelines .57 Annex F (informative) Welding of gas distribution systems in Europe .61 Annex G (normative) Automatic ultrasonic testing of girth welds .63 Annex H (informative) Examples of NDT reports. .68 Annex