Oil field pipe
welding for example...they generally fuse the bottom of the groove with
6010 for deep penetration of both pieces of pipe, and then finish with
7010 for a clean, neat finish bead that doesnt hang on stuff, is smooth
and penetrates all three surfaces..both pipes and the top of the 6010
bead.

I was on a lot of pipe jobs, and with the exception of the 54"OD 1/5" wall
that was done with an automated .072" FCAW and argon bug, it was ALL done
with 6010 or 6010 + on the root, and 7018 on the rest. This would be for
pipeline carrying crude and gas from offshore pipelines to onshore
refineries. I do not recall ever seeing a 7010 offshore. With a couple of
rare exceptions, it was 6010 and 7018.

Steve

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