(2) Minimum Shell Thickness. From paragraph AD-201 (a), the
minimum shell thickness for the cylindrical portion of the chamber is
calculated from
PR
tcy = ------ (for internal pressure only
S-0.5P
tcy = minimum required thickness of cylinder, inches
P = design pressure, psi
R = inside radius of cylinder, inches
S = Membrane Stress Intensity Limit, psi
(1000.0)(60.0)
thus tcy = --------------------- = 2.64 inches
23,200 - 0.5 (1000)
use tcy = 2.75 inches.
From paragraph AD-204.2, the minimum thickness for an equivalent
torispheroidal head with D/2h = 2 is given as the greater of
KPD
th = ---
2S
or
PD
th = ----.
2-SP
From Figure AD-204.1, K = 1.05
(1.05)(1000.0)(120.0)
thus th1 = --------------------- = 2.72 inches
2(23,200)
or
(1000.0)(120)
thus th1 = ---------------- = 2.643 inches.
2(23,200) - 1000
Thus choose the thickness of the heads as
th = 2.75 inches.
As before, for this head. D/2h = 2, L/D = r/D = 0.17, thus
h = 120/4 = 30.0 inches
L = (120)(0.9) = 108.0 inches
r = (120) (0.17) = 20.4 inches.
(3) Penetrations and Openings, Reinforcements. From paragraph
AD-510 of Article D-5, the maximum diameter penetration (isolated) that
requires no reinforcement is
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