Combining different welding method

by Andrzej
(Katowice, Poland)

Is it permissible acc. to AWS D1.1 to weld 1 test coupon 1 inch thick with two methods: root with GTAW 1/8inch and fill+cap with GMAW 7/8inch? What are the ranges of variables? May I use those method separately for future WPSs?


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I am not sure if it is technically acceptable per AWS D1.1 but engineering authority has some room to make such decisions per D1.1.

ASME section IX provides for this type of qualification and is sometimes used in conjunction with D1.1

I do remember jobs where I qualified on pipe to ASME section IX specs with tig root and smaw fill.
and then was authorized to weld structural D1.1 components without a separate test.