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MS Pipes

Available size and range

WEIGHT AND TOLERANCES

Permissible Variations in Weight

Single Length of 20 ft                      – 8%
Lots of 500 ft and over                   + 10% / ± 4%
Hydrostatic test pressure             700 Psi

Formula to calculate weight of Steel Pipes

Applicable for BSS, API & ASTM Standards
W = (D – T) X t X 4.85 (Kgs Per Foot)
D = Outside Diameter (Inch)
T = Thickness (Inch)

Tolerance for Wall Thickness

  Tolerance (Percent of specified wall thickness)
SIZETYPE OF PIPEGRADE B OR LOWERGRADE X – 42 OR HIGHER
≤ 2 7/8All+ 20.0, – 12.5+ 15.0, – 12.5
>2 7/8 and < 20All+ 15.0, – 12.5+ 15.0, – 12.5

Tolerance for Diameter of Pipe Body

SIZETolerance (Percent of specified wall thickness)
< 2 3/8+ 0.016 in., -0.031 in. (+0.41 mm , -0.79 mm)

≥ 2 3/8 and ≤ 4 1/2 continuous welded

± 1.00 % 
≥ 2 3/8 and  < 20± 0.75 % 

Tolerance for Diameter of Pipe Ends

SIZE

Minus Tolerance

Plus Tolerance

≤ 10 ¾

1/64 (0.40 mm)

1/16 (1.59 mm)

> 10 ¾ and ≤ 20

1/32 (0.79 mm)

3/32 (2.38 mm)

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