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Hi, I working on ASME Sect.I tube to Header weld. The header are carbon SA106 Gr.B while the tube is T11 material. connect with set-in design with groove So, this joint is combination groove weld and fillet weld. The weld size is 6 mm, Per table PW39-4 PWHT requirement provide exemption for...

Thanks for all answer.

Dhurjati Sen. No, This is Vogt Power spec. Thanks for the answer! Pook

The maximum weld size provided by AWS is to prevent distortion of the work piece but also depend on engineering decision, in this case to weld the plate along the length of the tube/pipe is acceptable. Regards, Pook

Hi, I working on HRSG Fabrication with 9 Cr material, I have customer specification state that "If the assembly is not PWHT within 24 hours of the completion of welding, it shall be enclosed or covered and be stored 5 degrees above ambient temperature" I wonder what is the reason to store work...

Thanks for the answers, gentlemen.

Thanks metengr, In additional. I'm working on Power plant and we use Sect,I and B31.1. Is there anything I can reference.

Gentlemen, I working on the project that require to do hardness test after PWHT but the project spec doesn't give a acceptance criteria. Where can I get the hardness valve for SA 106, SA 335 P11, SA 335 P22. I checked into ASME Sect II but can not find the hardness value. Thank you. Ittichet