PWHT Sect. VIII Div. I
PWHT Sect. VIII Div. I
(OP)
I need to attach some temporary lugs (push-pull) to a section of the vessel that has been heat treated. The lugs will be of P-1 material and attached by 3/8" fillet weld, the shell is P-1 material with a 1" thickness.
I don't see anything in sect. VIII that gives me a out to having to PWHT these areas. Am I missing something?
I don't see anything in sect. VIII that gives me a out to having to PWHT these areas. Am I missing something?





RE: PWHT Sect. VIII Div. I
Is postweld heat treatment a service requirement as set forth in UCS-68? REF: UCS-56(a)
What does your AI say?
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RE: PWHT Sect. VIII Div. I
ASME Section VIII, Div. 1, 2007 (2008 Addenda), Table UCS-56 for P1 materials,
"Notes:
(2)(c)for welded joints of all thickness if required b UW-2, except postweld heat treatment is not mandatory under the conditions specified below:
(3) for groove welds not over 1/2" (13mm) in size or fillet welds with a throat thickness of 1/2" (13mm) or less used for attaching nonpressure parts to pressure parts provided preheat to aminimum temperature of 200F (95C) is applied when the thickness of the pressure part exceeds 1 1/4" (32mm)."
I would recommend still preheating the base metal even though the thickness you indicate is only 1".
RE: PWHT Sect. VIII Div. I
RE: PWHT Sect. VIII Div. I
I have not looked/searched for Code Cases (alternatives), but I do not expect there to be any....
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RE: PWHT Sect. VIII Div. I
RE: PWHT Sect. VIII Div. I
Show the AI that you will meet the pre-heat requirements.
some inspectors will not help you but the Code allows it.
RE: PWHT Sect. VIII Div. I
It looks like the only option available is a local PWHT for your attachment welds per UW-40.
Thanks.