now as per UG-33 (a) (1) (a)
"For ellipsoidal and torispherical heads, the
required thickness shall be the greater of the following:
(a) the thickness computed by the procedure given
in UG-32 for heads with pressure on the concave side
(plus heads) using a design pressure 1.67 times the design
pressure on the convex side, assuming a joint efficiency
E = 1.00 for all cases;"

now my question

do we have to consider the static head in design pressure also? (when we multiply design pressure by 1.67)

Regards
ASD23789

sorry my fault
incorrect reading by mine.