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NORSOK STANDARD
systems, for which NORSOK L-CR-001, «Piping and Valves» is the governing design standard . This standard is based on ASME B31.3 in general and as an option to use EN 288 for welding procedure qualifications and EN 287 for welder qualifications in particular. The ASME B31.3 shall apply with addition of the requirements given in this standard.
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