S = [P(1.3D2 + 0.4d2)]/(D2-d2)
Where:
S = wall stress in psi;
P = at least two times service pressure or 450 psig, whichever is the greater;
D = outside diameter in inches;
d = inside diameter in inches.
49 C.F.R. §178.38
S = [P(1.3D2 + 0.4d2)]/(D2-d2)
Where:
S = wall stress in psi;
P = at least two times service pressure or 450 psig, whichever is the greater;
D = outside diameter in inches;
d = inside diameter in inches.
49 C.F.R. §178.38