ERW Steel Pipe: Technical Specs, API 5L Standards & Manufacturing

Electric Resistance Welded (ERW) carbon steel pipes are produced by cold-forming steel strip into a tubular shape and welding the longitudinal seam using high-frequency electric current (HFW). Designed to meet demanding structural and fluid transport requirements, ERW carbon steel pipes offer tight dimensional tolerances, uniform wall thickness, and reliable joint integrity without adding filler metal.

Outer Diameter (OD Range):
1/2″ to 24″ (21.3mm – 610mm)
Wall Thickness (WT):
SCH 10 to SCH 80 / STD / XS (1.5mm – 15.0mm)
Key Manufacturing Standards:
API 5L (PSL1/PSL2), ASTM A53, ASTM A252, EN 10219
End Processing & Coating:
Plain End, Beveled End (30°), 3LPE, FBE, Black Varnish
Common Structural & Line Pipe Specifications (ASTM A53 / API 5L)


Below is a standard dimensional reference chart for high-frequency ERW line pipes commonly produced and stocked for industrial projects.

Technical Standards & Material Grades for Global Projects
We supply ERW pipes that comply strictly with international quality protocols. For most infrastructure projects, the following standards are critical:

API 5L (PSL1 & PSL2): The gold standard for line pipe (Grades B, X42, X52, X60, X65).
ASTM A53: Standard for steam, water, and air pipelines.
ASTM A252: Preferred for structural piling applications.
EN 10219: Cold-formed welded structural hollow sections.
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