Pot Bend Heat Treatment : Induction Bends : B16.49
Pot Bend Heat Treatment : Induction Bends : B16.49
(OP)
Hi,
I would like the opinion of experts here on an issue related to post bend HT for induction bends to ASME B16.49.
A vendor is claiming that post bend heat treatment is not required for certain bends which have been ordered on them & per SR15.1, it does appear to be the case. some of my colleagues are of the opinion that PBHT is mandatory and as a minimum, stress relieving is required. Is this approach correct ?
Material grade X52.
I would like the opinion of experts here on an issue related to post bend HT for induction bends to ASME B16.49.
A vendor is claiming that post bend heat treatment is not required for certain bends which have been ordered on them & per SR15.1, it does appear to be the case. some of my colleagues are of the opinion that PBHT is mandatory and as a minimum, stress relieving is required. Is this approach correct ?
Material grade X52.





RE: Pot Bend Heat Treatment : Induction Bends : B16.49
Your vendor is correct if the bends were ordered to SR15.1.
40 years ago we tested a number of bends made in A-333 Gr 6 pipe that were controlled heated during the bending process. They were tensile tested (room temperature)and impact tested at -50F to permit their use without additional post bend heat treatment. We also tested low temperature, X60 bends in the same manner to preclude post bend heat treatment.
RE: Pot Bend Heat Treatment : Induction Bends : B16.49
RE: Pot Bend Heat Treatment : Induction Bends : B16.49
I agree that the vendor should abide by the terms of the Purchase order.
An issue that concerns me is for this material grade should we insist on having stress relief as minimum HT ?
RE: Pot Bend Heat Treatment : Induction Bends : B16.49
RE: Pot Bend Heat Treatment : Induction Bends : B16.49
RE: Pot Bend Heat Treatment : Induction Bends : B16.49