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Dimensional tolerance of ERW steel pipe

ERW steel pipes and tubes are used. ERW steel pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc.

Tolerance of outside diameter
 Standard  Out Diameter  Tolerance of Pipe End  Tolerance of Pipe Body
 API 5L  219.1-273.1  +1.6mm, -0.4mm   ±0.75% 
 274.0-320  +2.4mm, -0.8mm  ±0.75% 
 323.9-457  +2.4mm, -0.8mm  ±0.75% 
 508  +2.4mm, -0.8mm  ±0.75% 
 559-610  +2.4mm, -0.8mm  ±0.75% 
Tolerance of wall thickness
 Standard  Grade  Out Diameter  Wall Thickness
API 5L  /  219.1-457  +15%, -12.5%
 B  508-610  +17.5%, -12.5% 
 X42-X80  508-610  +19.5%, -8%



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