I will leave the answer to this question with JUOKO. I only have one general observation.CAESAR II will use PXA load at both ends of the bellow irrespective of whether it is tied , untied , hinged, gimbal etc, unless the analyst makes the effective ID equal to zero. The PXA load should be applied at all change in directions ( elbows, pump casing etc) and depending on the relative stiffnesses of the different components of the piping system,the actual PXA loading on the different elements can be checked. In case of tied bellows which nuts locked the PXA should not be of any concern as the nozzle loading will see the same PXA loading as with a rigid pipe. In case of untied bellows, the nozzle load will see minimum PXA load withy max. load going to pump foundation . CAESAR II however will show high axial load( caused by PXA ) in all cases unless the effective id is zero and the loading ie PXA is applied at correct locations.I find many analysts overlook this point.



Regards