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Which standard stipulates UT inspection 24hrs after welding?

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.

RE: Which standard stipulates UT inspection 24hrs after welding?

I have searched ASME AWS and API, I cannot find where it sates in any of these codes that UT has to be completed in 24hours after welding has been completed, could have been a clients specification that you read to come up with this statement, do you remember who the client was ?

RE: Which standard stipulates UT inspection 24hrs after welding?

AWS D1.5, not pipeline but maybe there's a related provision in D1.1, which I don't have access to right now:

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?

I know it is not an American code, but EN1011-2 "Recommendations for welding of metallic materials - Part 2: arc welding of ferritic steels" states in section 18:

"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?

Don't worry about non-American standards, there is a world outside! Here's a British one: BS 4515-1 for welding of carbon steel pipelines demands that the qualification test weld be inspected 24 hours after completion unless otherwise stipulated

Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
 

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