Which standard stipulates UT inspection 24hrs after welding?
Which standard stipulates UT inspection 24hrs after welding?
(OP)
Hello,
I've been trying to find a standard reference (ASME,AWS) that requires a UT inspection 24 hrs after welding carried out on process piplelines. I just cannot remember which standard it was mentioned in? I would appreciate your help in this regard.
I've been trying to find a standard reference (ASME,AWS) that requires a UT inspection 24 hrs after welding carried out on process piplelines. I just cannot remember which standard it was mentioned in? I would appreciate your help in this regard.





RE: Which standard stipulates UT inspection 24hrs after welding?
RE: Which standard stipulates UT inspection 24hrs after welding?
6.26.5.2. Acceptance of welds in ... Grades ... 100-100W steels shall be based on NDT performed not less than 48 horus after completion of the welds.
12.16.4 (fracture control plan) gives minimum cooling times for UT, MT, VT:
fillet welds on Gr. 50 or less, 24 hours
fillet welds on > Gr. 50, 48 hours
groove welds <= Gr. 50, weld depth <= 2", 24 hours
groove welds <= Gr. 50, weld depth >2", 48 hours
groove welds > Gr. 50, weld depth <= 2", 48 hours
groove welds > Gr. 50, weld depth >2", 72 hours
Hg
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RE: Which standard stipulates UT inspection 24hrs after welding?
"Due to the risk of delayed cracking, a period of 16h is generally required before final inspection"
RE: Which standard stipulates UT inspection 24hrs after welding?
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04