To calculate the cross section area of a steel pipe:
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A = 0.785di2
where
A = cross-sectional area of pipe (Square Inches)
di = inside diameter (inches)
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To calculate the weight of empty steel pipes:
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wp = 10.6802 t (do - t)
where
wp =weight of steel pipe (Pounds per Foot Pipe)
t = pipe wall thickness (Inches)
do = outside diameter (inches)
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To calculate the weight of water in pipes filled with water:
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ww = 0.3405 di 2
where
ww = weight of steel pipe filled with water (Pounds per Foot Pipe)
di = inside diameter (inches)
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To calculate the outside surface area of steel pipes:
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Ao = 0.2618 do
where
Ao = outside area of pipe - per foot (Square Feet)
do = outside diameter (inches)
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To calculate the inside surface area of steel pipes:
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Ai = 0.2618 di
where
Ai = inside area of pipe - per foot (Square Feet)
di = inside diameter (inches)
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To calculate the area of the metal:
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Am = 0.785 (do 2 - di 2)
where
Am = area of the metal (Square inches)
di = inside diameter (inches)
do = outside diameter (inches)
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