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Tack welders

Tack welders

Tack welders

(OP)
According to ASME do I need to certify my tack welders as long as all tack weld is removed by machining?  If so what section/paragraph states the requirements for it?  Thanks

RE: Tack welders

3lilaggies;
Which section of the Code is your item? Section I, Part PW does state that if a tack weld becomes part of a pressure retaining weld or structural attachment weld, the welder must be qualified but not necessarily identified.

Without knowing more about your specific application, I would tell you this that a person making ANY tack welds to pressure retaining items should be qualified AND use a qualified welding procedure.   

RE: Tack welders

(OP)
Section 8 and 9 mostly,  We're going to qualify any way just to be safe.  We already have a WPS for P1 to P1 and that is the material he will be tack welding.  Is there anything specific that I need to include in the WPS stating that the part was tacked?  I already have on there that all tack welds were removed prior to finish welding.

RE: Tack welders

Quote:

Is there anything specific that I need to include in the WPS stating that the part was tacked?

No.

RE: Tack welders

Tack welder has to be certified as per SC VIII Div.1, Div2, and SC I.

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