According to ASME sec IX, for GTAW, FCAW and GMAW in supplementary essential variables (QW 410.9) , a multi pass per side fillet/butt weld procedure cannot be used to weld single pass per side. (say single pass per side fillet weld.)
I am curious to know the technical reason behind the same. In my opinion, fill pass parameters of a butt weld procedure can be used for welding single pass fillet welds. Please advice if this is incorrect and kindly provide technical/ metallurgical reasoning for the same.
Thanks & best regards
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