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ASME IX - Production Assembly Mockup - Fillet Weld Qualification

ASME IX - Production Assembly Mockup - Fillet Weld Qualification

ASME IX - Production Assembly Mockup - Fillet Weld Qualification

(OP)
When would be the most appropriate time to use a production assembly mockup for a procedure qualification for a fillet weld to ASME IX welding?

It seems that if you follow the standard test coupon requirements you get a "golden ticket" for all fillet sizes and base metal thicknesses.  If you qualify using a production assembly mockup you only qualify essentially what you test.

What would the reasoning be to use a production assembly mockup?  Is it for unusual production shapes, or if you just don't have the proper pieces for the special test coupons?  

RE: ASME IX - Production Assembly Mockup - Fillet Weld Qualification

I have only seen its use by manufacturers for fabricating large multiples of the same part.

RE: ASME IX - Production Assembly Mockup - Fillet Weld Qualification

I have qualified some production tooling that the shop wanted made out of sockets and materials that was difficult or impossible to get in plate or ideal shapes for a traditional procedure.  Basically I had them weld it up and followed the instructions for qualifying a mock up.  Because of liability issues, anything (product or tooling)in our shop that is welded has to be qualified per ASME section IX.  Hope this helps.

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