Friday, November 20, 2020

[MW:31751] QUERY RELATED TO PWHT IN PQR & WPS

Dear Experts

Greetings of the day,

I Have an existing PQR of carbon steel P1G1 to P1G1 OF MATERIAL THICKNESS 21.94" & Diameter 6".

GTAW – 5.97mm & SMAW -17.1mm

PWHT – 640 deg. Cel. With soak time 75 min.

Impact test – Not Applicable

 

By using this PQR Can I make WPS for P1G1 to P1G1.Where T= 5mm to 25mm without PWHT (AS PER ASME B31.3  Para 331.1.1&331.1.3).

Because as per my project scope I need only 25mm maximum base metal thickness. So, for this I need to do PWHT or NOT. Although I have did PWHT in PQR.

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