Once the load and frequency are determined how far from the pump discharge nozzle should the piping be included in the Harmonic modeler? I'm assuming X load, say 50#, for X direction piping and 50# Z for Z direction piping.

Also how is the stress computed compared to a B31.3 stress allowable? I don't see a place in the load case combinations to do this. Is it a manual calc where you add Sustained and OCC dynamic?