FCAW-G using DCEN vs DCEP
FCAW-G using DCEN vs DCEP
(OP)
There recently has been a project completed at my work and an issue has been brought up that I do not know how to proceed on. The welders had manufactured a large structure using Flux core with gas, it was Hobart Excel Arc 71 wire. But they had the machine set up in DCEN. With most of the heat being applied to the base material, do you feel like the penetration would be sufficient or is it something that the welds would need to be ground out and redone in DCEP or would a lack of fusion at the root be a concern. I understand an easy answer is scrap it but I am curious if there is a way to salvage it, if you feel like there even is much of a concern. Thanks for any of your insight on this.





RE: FCAW-G using DCEN vs DCEP
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RE: FCAW-G using DCEN vs DCEP
RE: FCAW-G using DCEN vs DCEP
That would be my first step.
This way, you can show your client what happened, what the practical results are like, and whether or not he accepts this.
RE: FCAW-G using DCEN vs DCEP
RE: FCAW-G using DCEN vs DCEP
RE: FCAW-G using DCEN vs DCEP
What polarity was your PQR qualified with ?
What polarity were the welders qualified with ?
You mentioned a "structure" so there is a possibility you are working to AWS D1.1.
Change in polarity is an essential variable so if it is AWS D1.1 then none of the welds comply and you have a serious problem.
Good luck,
Regards,
DD
RE: FCAW-G using DCEN vs DCEP
RE: FCAW-G using DCEN vs DCEP
Best regards - Al