High-Frequency Resistance Welded (ERW) Steel Pipes: Precision Engineering for Demanding Industrial Applications

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ERW (Electric Resistance Welded) pipes are manufactured using advanced high-frequency induction welding technology, combining efficiency with structural integrity. By leveraging the skin effect and proximity effect of alternating currents, these pipes achieve seamless molecular bonding at welded edges under controlled pressure. Ideal for medium-to-high-pressure systems, ERW pipes offer cost-effective solutions without compromising performance.

‌Technical Specifications & Manufacturing Excellence‌

‌Production Standards:‌

• Compliant with ‌API 5L‌, ‌ASTM A53‌, ‌EN 10219‌, ‌GB/T 3091‌, and ‌JIS G3444‌.
• Certified for PSL1/PSL2 grades, ensuring traceability and quality assurance.

‌Dimensional Range:‌

• ‌Outer Diameter:‌ 1/2″ (21.3 mm) to 24″ (610 mm)
• ‌Wall Thickness:‌ 1.65 mm (0.065″) to 20 mm (0.787″)
• ‌Length:‌ 3 meters (9.8 ft) to 12 meters (39.4 ft), customizable for project needs.
• ‌End Finishes:‌ Precision-cut flat ends, beveled ends (30°–37.5°), or threaded ends (NPT, BSP).

‌Material Grades & Global Compliance‌

ERW pipes are crafted from high-quality hot-rolled coils, supporting diverse industrial requirements:

• ‌API 5L Grades:‌ Gr.A, Gr.B, X42, X46, X52, X56, X60, X65, X70 (PSL1/PSL2)
• ‌ASTM Specifications:‌ A53 Gr.A/B (Yield Strength: 205 MPa min)
• ‌EN Standards:‌ S275JR (275 MPa yield), S355J2H (355 MPa yield)
• ‌GB/T Materials:‌ Q235 (235 MPa yield), Q345 (345 MPa yield), L360 (360 MPa yield)

‌Global Material Equivalents:‌

‌Advanced Welding Technology & Quality Assurance‌

The ERW process ensures uniform weld integrity through:

1. ‌Skin Effect:‌ Concentrates current on the strip edges, achieving rapid heating (1,250°C–1,400°C).
2. ‌Proximity Effect:‌ Enhances energy efficiency by focusing heat on adjacent edges.
3. ‌Pressure Welding:‌ Forges molten edges using synchronized squeeze rollers, eliminating filler materials.

‌Mechanical Properties (Typical):‌

‌Versatile Applications Across Industries‌

ERW pipes excel in environments requiring reliability and affordability:

1. ‌Oil & Gas:‌ Flow lines, casing pipes, and gathering systems (API 5L compliance).
2. ‌Construction:‌ Structural frameworks, scaffolding, and HVAC systems (EN 10219 compliance).
3. ‌Water Distribution:‌ Potable water networks, irrigation, and drainage (AWWA C200 approval).
4. ‌Automotive:‌ Exhaust systems, chassis components (JIS G3444 compliance).

‌Advantages Over Seamless Pipes:‌

• 20–30% lower production costs.
• Consistent wall thickness (±5% tolerance).
• Faster lead times due to continuous coil processing.

‌Sustainability & Customization‌

ERW pipes reduce waste through precision coil usage and recyclable steel. Custom options include:

• ‌Anti-Corrosion Coatings:‌ Epoxy, galvanization, or 3LPE/3LPP for harsh environments.
• ‌Non-Standard Sizes:‌ Tailored diameters/wall thicknesses for niche applications.
• ‌Testing Protocols:‌ Hydrostatic testing, ultrasonic inspection (UT), and eddy current testing (ECT).

Certification & Compliance:‌

• ISO 9001:2015, ISO 14001, and PED 2014/68/EU certified.
• MTC/EN 10204 3.1 inspection reports available.

By integrating global material standards and performance benchmarks, this ERW pipe overview positions your product as a versatile, cost-efficient solution for modern infrastructure challenges. For project-specific requirements, consult our engineers to optimize dimensions, materials, and coatings.

Packing And Delivery