Hi:

I am working on a valve which has a body bolted connection. Now, apart from internal pressure, they have external loads acting on them (Seismic + Nozzle loads due to Pressure and Weight + Nozzle loads due to thermal + Nozzle Loads due to seismic). The external loads are converted into equivalent pressure using Kellog's method.

Now, while checking the the body bolt connection equation in B16.34-2004 6.4.2.1, does all these loads need to be added together for calculating the equivalent pressure. Or do we have different allowable for different kind of loads. Namely, different allowables for Seismic load or Thermal Load.

Thank You,

Kapil