I am trying to design a vertical pressure vessel with a design pressure of 2500 psi @ a design temperature of 810 deg. F. The specified material of construction is 2.25 Cr - 1 Mo and for my design I'm using SA-336-F22 Cl.3 forged shell courses & SA-387 Gr.22 Cl. 2 hemi heads.
Per ASME Sec. II...