American Welding Society Forum
While reviewing a PQR of thickness 22mm i found the PWHT time range is mentioned as 300 minutes and in WPS it is mentioned as 375 minutes.
The Pqr tested with impact test.
My question is that from whre did they get the soaking time of 300 minutes in PQR according to ASME SEC 8 UCS 56 the soak time doesnt matches with the mentioned one in the PQR?
If by using ASME SEC 9 then how? Explain the calculation pls?
How the soaking time in WPS changes to 375 from 300 as in the PQR? Is it correct
I don't have a copy of Section IX with me on this road trip, but if memory serves me, the PWHT used to qualify the WPS must be at least 80% of the time at temperature of the production weld. You might want to look for this in Section IX.
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