Dear Mr. Eduardo Calva,
Are you working as per ASME Sec-IX? If yes then it is not permitted to weld a complete circumference using different welders.
As per ASME Sec-IX, QW-302.2, the minimum weld length of coupons to be examined shall be 6 inch (150 mm) and shall include the entire weld circumference for pipe(s).
Best regards,
Shadab Alam Ansari
Welding Engineer
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Eduardo Calva
Sent: Thursday, December 02, 2010 5:39 AM
To: materials-welding@googlegroups.com
Subject: [MW:8469] Minimum Weld lengh for welder qualification
Dear friends:
Sometimes we have qualified four welders in the same coupon, for example in a 36" Ø pipe coupon the first two welders apply in overhead position one from 3 to 6 and the other one from 9 to 6, after they finish the cuopon is rotated in order to start the other welder couple as the same process. This has been accepted by our clients but I'd like to know if some code has a minimum lenght to be welded for qualification or it must be the entire cinrcunference of the pipe cuopon to be welded by a welder. I want to be prepared if a client supervisor ask me about it.
Eduardo Calva
QC Coordinator
Global Industries
México.
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