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Dimensional tolerance of ERW steel pipe

ERW pipes means Electric Resistance Welded Pipes.

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
 Out Diameter Tolerance of Pipe End Tolerance of Pipe Body
 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
 Grade Out Diameter Wall Thickness
 / 219.1-457 +15%, -12.5%
 B 508-610 +17.5%, -12.5% 
 X42-X80 508-610 +19.5%, -8%


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