Hot Products
ERW Steel Pipe from China Factory - Reliable Suppliers for API 5L, ASTM A53, Various Sizes & Grades
ERW pipe (Electric Resistance Welding pipe) is a pipe product that realizes continuous welding of metal strips through resistance heat effect. The core technology employs Joule's law (Q=I²Rt), where high-frequency current generates instantaneous high temperatures (1200–1400°C) at metal interfaces through contact resistance under electrode pressure. This induces a thermoplastic state, enabling metallurgical bonding via extrusion rollers.
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Product Specifications
| Parameter | Details |
|---|---|
| Standards | API 5L API 5CT ASTM A53 ASTM A179 ASTM A500 ASTM A252 BS1387 AS1163 JIS3444 EN 10217 EN10219 EN10255 GOST 3262 UL/FM Approved GB/T 9711-2023 GB/T3091 SY/T 5038 ISO3183 EN10210 GOST10704 GOST 20295 |
| Steel Grade |
API 5L: PSL1/PSL2 — Gr.A, Gr.B, X42, X46, X52, X56, X60, X65, X70, X80 ASTM: GR.A–C, GR.1–3 EN: S235JR, S275J0H, S355JRH, S355J2H AS1163: C250, C350, C450 GOST: St2kp, St3kp |
| Outer Diameter (OD) | 21.3mm – 660mm (½" – 26") |
| Wall Thickness (WT) |
1.5mm – 22.2mm SCH10 SCH20 SCH30 STD SCH40 SCH60 XS SCH80 SCH100 SCH120 SCH140 SCH160 XXS |
| Length | 5.8m, 6m, 11.8m, 12m, or customized (SRL / DRL) |
| Pipe Ends | Plain End (PE), Beveled End (BE), Threaded End (NPT, BSP) — with or without couplings |
| Surface Treatment | Black Painting Varnish Anti-rust Oil Hot-dip Galvanized 3PE FBE Epoxy Coating |
| Inspection | Chemical Component Analysis, Mechanical Properties (Tensile, Yield, Elongation), Metallographic Test, Hydrostatic Test, NDT (Eddy Current, Ultrasonic), etc. |
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Frequently Asked Questions
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What is ERW pipe and how is it manufactured?
ERW pipe (Electric Resistance Welding pipe) is produced by continuously welding metal strips using resistance heat. High-frequency current generates temperatures of 1200–1400°C at the metal interface through contact resistance, creating a thermoplastic state. Extrusion rollers then forge the edges together, achieving a solid metallurgical bond without filler material.
Q
What international standards does ERW pipe comply with?
Our ERW pipes comply with a wide range of international standards including API 5L, API 5CT, ASTM A53, ASTM A500, ASTM A252, EN 10217, EN10219, EN10255, BS1387, JIS3444, AS1163, GOST 3262, ISO3183, GB/T 9711-2023, and more — covering oil & gas, structural, and mechanical applications worldwide.
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What size range is available for ERW pipes?
ERW pipes are available in outer diameters (OD) ranging from 21.3mm to 660mm (½" to 26"), with wall thicknesses from 1.5mm to 22.2mm. Schedule options include SCH10 through SCH160, STD, XS, and XXS, covering most industrial and structural requirements.
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What surface treatment options are available for ERW pipes?
We offer multiple surface treatment options to suit different environments and applications, including black painting, varnish, anti-rust oil, hot-dip galvanizing, 3PE coating, FBE (Fusion Bonded Epoxy) coating, and epoxy coating. Custom surface treatments can also be arranged upon request.
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What quality inspections are performed on ERW pipes?
Each batch of ERW pipes undergoes rigorous quality control, including chemical component analysis, mechanical property testing (tensile strength, yield strength, elongation), metallographic examination, hydrostatic pressure testing, and non-destructive testing (NDT) methods such as eddy current and ultrasonic inspection.
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What pipe end types and lengths are available?
ERW pipes are available with Plain End (PE), Beveled End (BE), or Threaded End (NPT/BSP) — with or without couplings. Standard lengths include 5.8m, 6m, 11.8m, and 12m. Customized lengths (SRL/DRL) can be arranged to meet specific project requirements.