A181-I Flange Rating
A181-I Flange Rating
(OP)
I am modifying a nozzle on an existing ASME VIII vessel. The vessel was built several years ago and the drawings and U1A report state that the nozzle flange material used was A181-I.
I am running the analysis in Compress and it is telling me that the MAWP for a 300# flange with A181-I material is only rated for 590 psig.
My existing vessel has a design pressure of 600 psig and this is listed on the original construction drawing and U1A report.
My question is:
1.) Is this correct that a 300# flange made of A181-I is only rated for 590 psig?
2.) Does anyone have a flange rating chart for A181-I flanges?
Thank you very much!
I am running the analysis in Compress and it is telling me that the MAWP for a 300# flange with A181-I material is only rated for 590 psig.
My existing vessel has a design pressure of 600 psig and this is listed on the original construction drawing and U1A report.
My question is:
1.) Is this correct that a 300# flange made of A181-I is only rated for 590 psig?
2.) Does anyone have a flange rating chart for A181-I flanges?
Thank you very much!





RE: A181-I Flange Rating
RE: A181-I Flange Rating
RE: A181-I Flange Rating
RE: A181-I Flange Rating