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Engineering ToolBox > Pipe Equations
Pipe cross-sectional area, empty pipe weight, pipe filled with water weight, inside and outside pipe surface area for a unit length pipe can be calculated with the equations below.
Cross-sectional Area of a Steel Pipe can be calculated as
A = 0.785 di 2
where
A = cross-sectional area of pipe (Square Inches)
di = inside diameter (inches)
Weight of empty steel pipes can be calculated as
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)
Weight of water in pipes filled with water can be calculated as
ww = 0.3405 di 2
where
ww = weight of steel pipe filled with water (Pounds per Foot Pipe)
di = inside diameter (inches)
Outside surface area of steel pipes can be calculated as
Ao = 0.2618 do
where
Ao = outside area of pipe - per foot (Square Feet)
do = outside diameter (inches)
Inside surface area of steel pipes can be calculated as
Ai = 0.2618 di
where
Ai = inside area of pipe - per foot (Square Feet)
di = inside diameter (inches)
Area of the metal can be calculated as
Am = 0.785 (do 2 - di 2)
where
Am = area of the metal (Square inches)
di = inside diameter (inches)
do = outside diameter (inches)