Piping flange constrain loads convert to an equivalent pressure to check the flange rating

[mechengineer]

Hi everyone,
ASME VIII (pressure vessel code) code case 2901 request to check the nozzle flange rating by an equivalent pressure converted from the external loads.
The external loads of nozzle flange on pressure vessel come from the mate flange of piping. Does Caeser II convert the constrain loads(the moment and axial tensile force)to an equivalent pressure to check the piping flange rating? If not, how to make sure the piping flange will not leak under the constrain piping loads by using Caeser II?
Thanks.

 

[richay]

Yes CAESAR II converts that applied force and moment into an equivalent pressure term, which is then used in the ASME equations (Appendix 2) to determine flange stresses. Note, ASME Section VIII Appendix 2 is not a leakage check. The best you can do in this regard is activate the leakage check in the CAESAR II flange module, which performs a rough FEA analysis of the flange and loads.

Richard Ay
Hexagon PPM (CAS)