RT Before or After PWHT
RT Before or After PWHT
(OP)
Does ASME Section VIII specify if RT is to be performed before or after PWHT. I have searched and have not found information supporting either.
Thanks for your input, I would like the code reference to your response.
WBH
Thanks for your input, I would like the code reference to your response.
WBH





RE: RT Before or After PWHT
RT in accordance with ASMe Section VIII may be performed before or after stess.
JR0097
RE: RT Before or After PWHT
if customer does not have any specs contrary...we do it before.
I the client wants it after pwht per spec....we do it before and after
RE: RT Before or After PWHT
WBH
RE: RT Before or After PWHT
RE: RT Before or After PWHT
RE: RT Before or After PWHT
Smart fabricators do all NDE before PWHT and then again after PWHT to meet specs.
Done every day all around the world.
RE: RT Before or After PWHT
Our specs call for RT prior to PWHT to detect volumetric defects unless it is a machine or MIG weld where we also require UT prior to PWHT. After PWHT we normally do UT checks to detect any cracking and usually do a few hardness checks. The hardness checks are just a test to verify that there were no material mix ups. The hardness checks have been mostly eliminated due to better PMI equipment.
In my 42 years I've never seen any problems with P-1 material during and after PWHT.
RE: RT Before or After PWHT
most HF services and hydrogen and Wet Sour services now require nde after PWHT.
we normally UT before (for or protection) and RT after
Cat D joints are UT before and after.
all P-1 material...yes a pain but never a problem
RE: RT Before or After PWHT