Unit Weight Calculation Method:

1.API, ASTM, AISI Standards
W - 10.68(D-t)t
W= Weight per unit length(lb/ft)
t= Wall thickness of pipe(in)
D= Outside diameter od pipe (in)
The result of calculation is rounded to two places of decimals

2.BS Standards
W - 10.68(D-t)t
W= Weight per unit length(lb/ft)
t= Wall thickness of pipe(in)
D= Outside diameter od pipe (in)
The result of calculation is rounded to a three figure number

2.JIS Standards
W - 0.02466(D-t)t
W= Weight per unit length(lb/ft)
t= Wall thickness of pipe(in)
D= Outside diameter od pipe (in)
The result of calculation is rounded to a three figure number

Conversion of Unit

1.API Standards
W(lb/ft) x 0.454 = W/' (kf/ft)
W, W'= Weight per unit length
W'=To be rounded to two decimal places

1.ASTM Standards
W(lb/ft) x 0.45359237 = W/' (kf/ft)
W, W'= Weight per unit length
W'=To be rounded to two decimal places

1.BS Standards
W(lb/ft) x 0.45359237 = W/' (kf/ft)
W'=To be rounded to three figure

1.Length
L(ft) x 0.3048 = L'(m)
I(in) x 25.4= I(m)