ASTM A500

ASTM A500 covers carbon steel, cold formed welded and seamless structural tube in both round and shaped forms.

Carbon Steel Seamless Pipes
ASTM A53

ASTM A53 / A53M Standard covers seamless and welded black and hot-dipped galvanized steel pipe.

API 5L welded line pipe
API SPEC 5L

API SPEC 5L is specifies requirements for the manufacture of two product specification levels.

ASTM A178

ASTM A178/A 178M Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes

ASTM A513

Tubing produced to the A513 specification also provide improved ductility with its closely controlled carbon steel grades.

ERW steel pipe in API 5L PSL2
ERW steel pipe in API 5L PSL2

API American Petroleum Institute standard --API (American Petroleum Institute) abbreviation.

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%



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