Hi experts,

I am new to pipe stress analysis ( and piping too). I wonder why piping codes divide loads into many load cases instead of using 1 combination load (includes all GRTP, earthquake, wind, etc).

because my senior wants to know the general stresses (shear, hoop, longitudinal, total,...=> tension or compression to evaluate the dangerous points) from CAESAR II (he is familiar with ANSYS, SOLIDWORKS,...But doesn't know anything about this software too). So I have to explain him that this software calculates stresses according to codes and bases on the codes to asses the critical points.

But he would ask about why the codes divide loads like that, the purpose?

Please help me. I will be very appreciated. Thanks