PWHT and tube repairs
PWHT and tube repairs
(OP)
Hi all,
I have three questions:
1) I have a failed tube which has a longitudinal crack, about 1.5" in length. The manager doesn't want to re-tube, instead, he asked me to repair the tube. I was thinking about doing window patching, but I think window patching is more suitable for bulged tubes. What are your guys opinion?
2) Which should come first, the PWHT or NDT (radiography)?
3) BS code states that PWHT is required for plates thicker than 35 mm. What does ASME Code Sec I say about the minimum thickness for PWHT?
Thanks very much, I hope this matter can be solved.
Best regards
Aida Honey
I have three questions:
1) I have a failed tube which has a longitudinal crack, about 1.5" in length. The manager doesn't want to re-tube, instead, he asked me to repair the tube. I was thinking about doing window patching, but I think window patching is more suitable for bulged tubes. What are your guys opinion?
2) Which should come first, the PWHT or NDT (radiography)?
3) BS code states that PWHT is required for plates thicker than 35 mm. What does ASME Code Sec I say about the minimum thickness for PWHT?
Thanks very much, I hope this matter can be solved.
Best regards
Aida Honey





RE: PWHT and tube repairs
A window repair will be tricky and requires enough material to be removed to ensure proper fit up. With an axial-oriented rupture of this type, I would simply plug the tube versus repair it.
RE: PWHT and tube repairs
RE: PWHT and tube repairs
RE: PWHT and tube repairs
RE: PWHT and tube repairs
RE: PWHT and tube repairs
RE: PWHT and tube repairs