This calculator is based on VIII-1, UG-32 and is applied to a conical section.
UG-16(b) minimum thickness requirement has not been taken into consideration here.
Wall Thickness (t)
E = seam (joint) efficiency for, or the efficiency of, appropriate joint in cylindrical or spherical shells, or the efficiency of ligaments between openings, whichever is less.
For welded vessels, use the efficiency specified in UW-12. For ligaments between openings, use the efficiency calculated by the rules given in UG-53.
P = internal design pressure (see UG-21)
OL = diameter of large end of cone
Os = diameter of small end of cone
S = maximum allowable stress value (see UG-23 and the stress limitations specified in UG-24)
t = design thickness of cone shell
Cr = corrosion allowancefactor
Tr = required thickness of cone shell
Pm = Pressure maximum (psi)
a = atan(OL - Os)/(2L) (radians) calculated angle
nt = t - cr (thickness of cone plate compensated for corrosions allowance)