Steel Pipe Calculation Formulas

Fomulas to calculate area and weight of empty steel pipes and steel pipes filled with water
To calculate the cross section area of a steel pipe:
  A = 0.785di2        

where

A = cross-sectional area of pipe (Square Inches)

di = inside diameter (inches)

To calculate the weight of empty steel pipes:
  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)

To calculate the weight of water in pipes filled with water:
  ww = 0.3405 di 2       

where

ww = weight of steel pipe filled with water (Pounds per Foot Pipe)

di = inside diameter (inches)

To calculate the outside surface area of steel pipes:
  Ao = 0.2618 do       

where

Ao = outside area of pipe - per foot (Square Feet)

do = outside diameter (inches)

To calculate the inside surface area of steel pipes:
  Ai = 0.2618 di       

where

Ai = inside area of pipe - per foot (Square Feet)

di = inside diameter (inches)

To calculate the area of the metal:
  Am = 0.785 (do 2 - di 2)       

where

Am = area of the metal (Square inches)

di = inside diameter (inches)

do = outside diameter (inches)