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
 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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