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Outer Barrel

Esteel        = 4.32 * 109 lb / ft2

Gsteel        = 1.73 * 109 lb / ft2

Do        = 2.188 ft

Di        = 2.000 ft

A        = π/4*(Do2-Di2) = 0.617 ft2

M        = (ρsteel * A) * 110% (couplings) = 10.331 slugs /ft

ρ        = M / A = 16.753 slugs /ft3

Dd        = 2.188 ft

V        = π/4*(Do2) = 3.758 ft2

Db        = 2.188 ft