Weight per foot Barlow's Formula  
     

Pipe Weight Formula - This formula can be used to determine the weight per foot for any size of pipe with any wall thickness.

pipepicThe formula is:
Wt/Ft = 10.69*(OD - Wall Thickness)*Wall Thickness

Outer Diameter (i.e.10.75 or 8.625 inches)
Wall Thickness (i.e. .365 or .322 inches)

ID Calculation:

The formula for determining the inside diameter of round tube and pipe is as follows:

Outside diameter (OD) – 2 x wall thickness
Example, 10.75” OD – 2 x .365” wall thickness = 10.02” inside diameter for 10” sch. 40
pipe size.