![]() It has been specified that notch toughness is required for production welds. Question: Will this PQR support a WPS that specifies a PWHT temperature range below the lower transformation temperature, provided the time at temperature does not exceed 12.5 hr?” Notch toughness is required and all qualification ranges are supported by the PQR for production welds. The PQR documents all supplementary essential variable notch toughness requirements. 1, Group 2 plate material and postweld heat treated at 1110☏ to 1130° F (600☌ to 610☌) for 10 hr. “Background: A weld test coupon for a PQR was welded to itself using P-No. What must be kept in mind while applying PWHT as an essential variable as well as supplementary essential variable? A question asked in an Interpretation has been used to explain the point.Ĭonsider the following question asked in Interpretation IX-07-06. In this article, we shall discuss on an example having a PQR qualified with a PWHT (post weld heat treatment).
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