BS EN IS0 15612:2018 BSl Standards Publication Specification and qualification of welding procedures for metallic materials - Qualification by adoption of a standard welding procedure specification bsi. BSENIS015612:2018 BRITISH STANDARD National foreword ThisBritishStandardis theUKimplementationofENIS015612:2018. It isidentical to IS0 15612:2018.It supersedes BSENIS015612:2004, which is withdrawn. BSI, as a member of CEN, is obliged to publish EN IS0 15612:2018 as a British Standard. However, attention is drawn to the fact that during the development of this standard, theUK committee voted against itsapproval. When a standard weldingprocedure specification (SWPS)is applied, the user follows a welding procedure specification based on welding procedure qualification tests carried out by another organisation. Therefore, the user does not benefit from the experience acquired through the development and qualification of the welding procedure specification itself. As a consequencethe UK committee is of the opinion that the application of SWPSs should be limited to parent material groups and thicknesses that aresimpletoweld and tolerant to deviations tothespecifiedweldingvariables The UK committee is particularly concerned with the limits on the use of SWPSs specified in EN IS0 15612:2018for parent material thickness (Clause 4.2.2) and parent material groups (Clause 4.2.4). Caution is required to avoid detrimental metallurgical effects when SWPSs are applied for welds between IS0/TR 15608 parent material groups 1.2, 1.3, 11.1, 22.1 and 22.2 and with parent material thickness(es) in the range 20-50 mm. In addition to this standard, the UK committee recommends consulting BSEN IS0 15614-1:2017asan additional source of information. The UK participation in its preparation was entrusted to Technical Committee WEE/36, Qualification of welding personnel and welding procedures. A list of organizations represented 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 responsiblefor its correct application. TheBritishStandards Institution2018 Published by BSI Standards Limited 2018 ISBN 978 0 580 92991 5 ICS25.160.10 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 20i8. Amendments/corrigenda issued since publication Date Text affected EN ISO 15612 EUROPEAN STANDARD NORME EUROPEENNE EUROPAISCHE NORM July 2018 ICS25.160.10 Supersedes ENIS015612:2004 English Version Specification and qualification of welding procedures for metallic materials - Qualification by adoption of a standard welding procedure (IS0 15612:2018) Descriptif et qualification d'un mode operatoire Anforderung und Qualifizierung von de soudage pour les matériaux métalliques Schweifverfahren fur metallische Werkstoffe Qualification par reference a un mode operatoire - Qualifizierung durch Einsatz eines de soudage standard (IS0 15612:2018) Standardschweifverfahrens (IS0 15612:2018) This European Standard was approved by CEN on 24 June 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status ofa national standard withoutany alteration.Up-to-date lists and bibliographical references concerning such national standards maybe obtained on application to the CEN-CENELEC Management Centre ortoany CENmember. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility ofa CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENmembers are the national standards bodies ofAustria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark Estonia, Finland, Former Yugoslav