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PWHT P-number 1 higher temperature 1

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Jeldon

Jeldon

Chemical
May 20, 2013
25
What would be the highest PWHT temperature for the P-Number 1 according to TABLE UCS-56 of ASME SECTION VIII Div. 1

Kind regards
 
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The highest temperature would be 1340 deg F, which corresponds to the approximate lower critical transformation temperature for P-No 1 base materials. The reason it is not listed as a maximum in Table UCS-56 is because Section IX requires re-qualification of a WPS with PWHT if the lower critical transformation temperature is exceeded.
 
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