ASME IX Base metal qualified thickness range PERMISSIBLE VARIATIONS
ASME IX Base metal qualified thickness range PERMISSIBLE VARIATIONS
(OP)
Hi All,
Here is a nice case:
I have a P1 to P1 Welding procedure. The range qualified is 5mm to 46.02mm but I have pipe with a thickness of 50.8 mm. I know that according to table QW-451 this thickness is higher than 2T. But, I want to know is there a tolerance in ASME IX or elsewhere that we can use to avoid qualifying this pipe.
from my point of view even if a welder who welds a 46mm thick pipe can easily weld 50.8mm, I think that a WPS to qualify the thicker pipe is necessary. What is you opinion?
thank you
Here is a nice case:
I have a P1 to P1 Welding procedure. The range qualified is 5mm to 46.02mm but I have pipe with a thickness of 50.8 mm. I know that according to table QW-451 this thickness is higher than 2T. But, I want to know is there a tolerance in ASME IX or elsewhere that we can use to avoid qualifying this pipe.
from my point of view even if a welder who welds a 46mm thick pipe can easily weld 50.8mm, I think that a WPS to qualify the thicker pipe is necessary. What is you opinion?
thank you





RE: ASME IX Base metal qualified thickness range PERMISSIBLE VARIATIONS
RE: ASME IX Base metal qualified thickness range PERMISSIBLE VARIATIONS
RE: ASME IX Base metal qualified thickness range PERMISSIBLE VARIATIONS
RE: ASME IX Base metal qualified thickness range PERMISSIBLE VARIATIONS
Do you have one weld to do or numerous ?
Is it possible to machine the ends of the pipes ?
I looked at ASTM A106 (as an example as you quoted P1) and the minimum thickness of 50.8 mm WT pipe is 44.45 mm.
Skim 2 mm off the OD of your pipe or transition the ID (if process fluid allows)
As long as you are in compliance with the applicable piping code based on reduction in WT you should be good to go,
Regards,
Kiwi