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BOP

Esteel        = 4.32 * 109 lb / ft2

Gsteel        = 1.73 * 109 lb / ft2

Do        = 5.000 ft

Di        = 1.500 ft

A        = π/4*(Do2-Di2) = 17.868 ft2

M        = (Psteel * A) * 150.0% (BOP structure) = 408.095 slugs /ft

ρ        = M / A = 22.840 slugs /ft3

Dd        = 5.000 ft

V        = (π/4*(Do2 -Di2)) * 148.5% (BOP structure) = 26.795 ft2

Db        = 5.841 ft