General. The required thickness at the thinnest point
after forming [see footnote 18, UG-32(a)] of ellipsoidal,
torispherical, hemispherical, toriconical, and conical heads
and conical segments under pressure on the convex side
(minus heads) shall be computed by the appropriate formulas
given in this paragraph (see UG-16). Heads with bolting
flanges shall meet the requirements of UG-35.1. In addition,
provisions shall be made for any other loading given
in UG-22. The required thickness for heads due to pressure
on the convex side shall be determined as follows