The paper will cover the general approach of welding requirements in RCC-M 2012Ad2014[1], from a technical and quality point of view.

It will be clarified how EN standards has been taken in account, mainly due to developments pushed by Pressure Equipment Directive (97/23/EC)[2] in Europe. It will be explained how nuclear activities for welding need to restrain the use of standards developed firstly for the needs of non nuclear industries. New ISO/ EN standards related to welding (ISO 9606-1, ISO 15614-1, ISO 3834) will be considered, and how they may lead to international cohabitation, compatibilities or harmonization, between nuclear codes.

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