WPS AND PQR IMPACT TESTING
WPS AND PQR IMPACT TESTING
(OP)
MDMT for vessel is -50°F for design pressure. There one more condition other than design pressure (pressure less than design pressure) which needs MDMT of -58°F.
Using reduction ratio UCS-66 base metal needs to be impact tested at -50°F and not at -58°F.
Can we take reduction for impact testing of WPS and PQR? Can we impact test WPS and PQR at -50°F OR we have to impact WPS and PQR at -58°F?
Thanks
Dinesh
Using reduction ratio UCS-66 base metal needs to be impact tested at -50°F and not at -58°F.
Can we take reduction for impact testing of WPS and PQR? Can we impact test WPS and PQR at -50°F OR we have to impact WPS and PQR at -58°F?
Thanks
Dinesh





RE: WPS AND PQR IMPACT TESTING
RE: WPS AND PQR IMPACT TESTING
You PQR is qualified for a specific impact test requirement, say -50F. That means your fabricated component must be impact tested at least -50F. How do you arrive to the -50F impact test temperature, that is driven by the thickness and the applicability of UCS-66 and has nothing to do with your PQR. Again, if the impact test requirements for your pressure component requires test at -75F, then your PQR qualified for only -50F is not acceptable and you have to produce a PQR qualified at -75F.
cheers,
gr2vessels
RE: WPS AND PQR IMPACT TESTING