PWHT stage?

[zjliang]

Hi All,

Found that "1 stage" or "2 stage" were marked for PWHT requirement on the datasheet. What does the number of stage mean?

Thanks in advance

 

[Goahead]

Lacking any contextual information on materials and temperatures one can only guess that stage 1 stands for a stress relieving treatment to be performed immediately after welding to prevent cracking when cooling to room temperature, while stage 2 is performed later at leisure according to requirements to develop final properties.

http://www.welding-advisers.com/

 

[metengr]

Go back and ask the fabricator.

 

[VeryPicky]

Could be partial PWHT for vessel with local on closing seam. These are pure speculations. Anyway you have to get the fabricator or engineering to clarify.

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