Saturday, July 28, 2012

[MW:14971] Need PWHT IN TEST pice



Dear weld expert 

 
I have a one Question that is in welder test  P91 Material with welding process gtaw for root and smaw for fillup and caping.
Preheating also given 250 degree.  After cmplete the test pice can it is necessary do pwht  for welder qualification and Ndt process .

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