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[MW:35859] PWHT REQUITEMENT AS PER ASME Section VIII Div.1 UCS-56

By Materials & Welding
Dear Team,

  I want to confirm about the PWHT requirement in carbon steel pressure vessel as per ASME section Viii Div.1 UCS-56. Soaking time has been calculated as per vessel wall thickness 29mm but trunion wall thickness is 50mm welded with shell. Can this 50mm thikness be exluded from PWHT soaking time requirement. 
1.Is there any interpretation to confirm that PWHT parameters shall be calculated as per shell wall thickness only not for attachment welded with pressure parts?
2. Below para is applicable for PWHT requirement.




Best regards,
M Bilal

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