ASME B16.5 Flange Rating - Allowance
ASME B16.5 Flange Rating - Allowance
(OP)
A certain fabricated skid used an SS flange connection for an instrument connection. The SS flange has a lower max allowable pressure than the rest of the CS class 150 flange rating. The design pressure of the system is marginally over the SS flange rating by a fraction of a bar. Is there any provision in the code that may exempt the use of the SS flange at the marginal excess over the flange rating.





RE: ASME B16.5 Flange Rating - Allowance
RE: ASME B16.5 Flange Rating - Allowance
Think you are asking for trouble using a flange that is not rated for the Design Pressure. If anything happens in operation I don't think you will have a leg to stand on in defence of doing this.
RE: ASME B16.5 Flange Rating - Allowance
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way