PWHT requirement for LPG
PWHT requirement for LPG
(OP)
Hi,
We are having LGP service for one of our project, is PWHT applicable here?
Thickness of pipe is 5.49 mm so by code its not applicable.
We are having LGP service for one of our project, is PWHT applicable here?
Thickness of pipe is 5.49 mm so by code its not applicable.





RE: PWHT requirement for LPG
RE: PWHT requirement for LPG
RE: PWHT requirement for LPG
My worry is about LPG .. whether it needs to have PWHT to avoid brittle fracture.
RE: PWHT requirement for LPG
Cheers,
DD
RE: PWHT requirement for LPG
Sounds good to go.
RE: PWHT requirement for LPG
As per ASME section VIII division 1, Table UCS-56.1, General notes (b)
LPG is not a special service.
1- PWHT is mandatory for welded joints over nominal thickness 38 mm.
2-PWHT is mandatory over nominal thickness 32 mm through 38 mm nominal thickness unless provided preheat for minimum temperature of 95 degree Celsius.
In your case, PWHT is not required as per code, but if recommended by purchaser, then its mandatory to perform for holding time of minimum 15 minutes at 595 degree Celsius temperature.
Cheers
Adiba Qudoos