No he can't, "Delation of backing gas" is an essential variable: ASME IX QW 356
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Le Lundi 2 décembre 2013 9h37, binoy soman <binoy.sadhupuram@gmail.com> a écrit :
Dear Experts,
I have a welder qualified for GTAW in P15E material with argon as inert gas backing. Can he do butt weld GTAW in Carbon Steel (Welded with out argon as backing)
Sumod
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