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
 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%

Weled steel pipe specification, Standard and identification

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.

Galvanized pipe process characteristics

What is Galvanized Steel Pipe? Galvanized steel can be made into a strong plumbing or tubing material -- one that resists corrosion from exposure to water or the elements. It has been used used for water-supply pipes or as a strong tubing for outdoor applications.

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