PWHT
PWHT
(OP)
After inspecting a vessel (tower) it was decided that the vendor was required to remove a downcomer bar and re-install in another location. The tower was already post-weld heat treated. shall the vendor be required to do another post weld heat treat after this alteration? Their A.I. has already signed off on the order which states that no PWHT is required.





RE: PWHT
RE: PWHT
if there is a service issue as noted above then it may be required.
This is all up to the end user.
RE: PWHT
weld sizes are 1/4" and 5/16"
lethal service
RE: PWHT
RE: PWHT
RE: PWHT
RE: PWHT
but....lethal service requires PWHT per UW-2
but....UCS-56 says it is not mandantory for these size welds if welding is done per UCS-56 and procedure.
BUT....when dealing with service requirements and PWHT...
It is always better to let the end user make the final decision. If it's just one downcomer bar, a local PWHT is not that expesive and if it makes the customer happy....then everbody is happy.
RE: PWHT
RE: PWHT
RE: PWHT