PWHT Requirement for API Tank - CR4 Discussion Thread

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Mujib Participant Join Date: Sep 2010 Posts: 2	PWHT Requirement for API Tank 09/14/2010 2:47 AM
	Dear All a very good morning to you!!! Can anyone clarify me whether all nozzle openings and manhole openings are required PWHT. my shell thickness is 15mm and how i can carry out the PWHT. Please help me. regards, S.M.BASHA
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piping_engineer Associate Join Date: Jan 2010 Posts: 52 Good Answers: 2	#1 Re: PWHT Requirement for API Tank 09/16/2010 5:41 AM
	PWHT depends on Base metal thickness and the base metal too. u can find its requirements in "AWS". Generally 20mm or onward thicnkess of base metal is requirement for PWHT
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adriangan82 Member Join Date: Sep 2010 Posts: 5	#2 Re: PWHT Requirement for API Tank 09/23/2010 1:53 AM
	if the material is P1 then PWHT can be replace by Preheating (for welding)
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