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AP 1014 Welder Qualification

AP 1014 Welder Qualification

AP 1014 Welder Qualification

(OP)
I am outside of my filed of Hydraulics/civil eng, but I need some advice on welder qualification until I can get qualified inspectors on board.

I have several hundred km of 72 inch dia 17.48mm wall thickness X65 pipe designed  to B31.4. welding qualification to API 1014.

My reading is that it is a owner's option to qualify welders using only NDT testing (no mechanical tests) 1) is my understanding correct and 2) is t reasonable/safe to qualify only on NDT ?

   

RE: AP 1014 Welder Qualification

I'm guessing that you're talking about API 1104.  Whether you use NDT, pull tests, or both is typically left up to the pipe owner.  I worked for a company that required both and never once had a welder pass the NDT and fail the pull test or vice versa (if they're going to fail, they fail both).  If using NDT on a qualified welding procedure doesn't provide adequate proof that the weld is suitable for the design service then why the heck do we do it for the field welds?  

Fact is that using x-ray with a qualified welding procedure does in fact provide adequate assurance that the welder is competent.  That doesn't mean that he won't make the occasional bad weld, but neither does using a pull test for qualification.  

I think that testing to a qualified welding procedure is a more important question that gets skipped over too often.  If I have a qualified welding procedure then I'm content to do a pass/fail based on x-ray.
  

David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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RE: AP 1014 Welder Qualification

Actually, making that the "qualified procedure" is actually followed; and that "qualified materials" are actually used in every weld in the field is as important (or more important) than the test used to verify a welder can do one weld properly in the training facility.  

In the test facility, the welder is under the microscope, and his weld is checked by a known procedure, with everybody able to see what he is doing.   In the field, he is "invisible" under the pipe, in the ditch, or behind the weld screen and a long way away from the inspectors.    

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