PWHT for API 650 Nozzles?
PWHT for API 650 Nozzles?
(OP)
As per API 650 requirements ,it is required to PWHT nozzles as the thickness of shell exceeds 1/2 inch and material group IV,my questions:
1 What is the idea behind prohibiting PWHT on tank after erection on tank?
2 Is it required to perform PWHT only in a furnace or we can perform it with PWHT machine in site before erection?
3. Is there any considerations that PWHT can be done after installation?
1 What is the idea behind prohibiting PWHT on tank after erection on tank?
2 Is it required to perform PWHT only in a furnace or we can perform it with PWHT machine in site before erection?
3. Is there any considerations that PWHT can be done after installation?





RE: PWHT for API 650 Nozzles?
2. I suppose it is possible to PWHT in the field prior to installation, although I am not sure why you would want to do that.
3. Appendix D 650-I-01/00 is quite clear that PWHT must be performed prior to installation and that localized PWHT cannot be used. However, it is silent on the question if you were to PWHT the entire tank in the field. I can pursue this further, if you would like.
RE: PWHT for API 650 Nozzles?
RE: PWHT for API 650 Nozzles?
RE: PWHT for API 650 Nozzles?
RE: PWHT for API 650 Nozzles?
RE: PWHT for API 650 Nozzles?