Hello All - Working to API 1104 20t

[weld9]

Hello All - Working to API 1104 20th. edition, does welding X52 to Gr. B material require a qualified procedure for X 52 only, or do we need qualified procedures for X52 and Gr. B? We would them weld following the X52 procedure. Please advist. Thanks

 

[LittleInch]

I would try the welding forum, hidden under structural engineering heading.

https://www.eng-tips.com/threadminder.cfm?pid=725

Depends on the definition of the grades and what is allowed under the code, but the conservative answer is do an X52 TO grade B procedure, test it and then use it. The last sentence doesn't make sense to me. Why would you qualify a procedure specific to your requirements and then say you're going to use a different one?

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