GMAW Pre-Qualified Welds

Question

GMAW Pre-Qualified Welds

scanf1027 (Structural)

(OP)

25 Mar 09 08:03

I have a project where the special inspector flagged some welds because they were done with GMAW process. The welds are 3/16" vertical fillet welds. Is this procedure pre-qualified for this type of weld?

DVWE (Petroleum) · Answer 1 · 2009-03-25 09:39:24

RE: GMAW Pre-Qualified Welds

DVWE (Petroleum) 25 Mar 09 09:39

Which code are you building to?

scanf1027 (Structural) · Answer 2 · 2009-03-25 10:37:50

RE: GMAW Pre-Qualified Welds

scanf1027 (Structural)

(OP)

25 Mar 09 10:37

IBC 2006, which references AWS D1.1-04

DVWE (Petroleum) · Answer 3 · 2009-03-25 11:00:32

GMAW spray arc is a pre-qualified process per D1.1

However, that does not imply that the process may be used without a written WPS. All pre-qualified means is that no PQR is required, and therefore no mechanical testing.

You should review Section 3 of D1.1 to ensure all other prequalified requirements are met.

DVWE (Petroleum) · Answer 4 · 2009-03-25 11:02:41

If your fillet welds were made in the vertical position, that means GMAW short circuiting arc was probably used, and that is NOT a pre-qualified process.

scanf1027 (Structural) · Answer 5 · 2009-03-25 12:26:33

RE: GMAW Pre-Qualified Welds

scanf1027 (Structural)

(OP)

25 Mar 09 12:26

Thanks DVWE

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