ERW Hot-Dipped Galvanized Rectangular Steel Tube For Construction

Product Overview

This product is aHigh-Frequency Electric Resistance Welded (ERW) Hot-Dipped Galvanized Square/Rectangular Steel Tube, formed from high-quality hot-rolled or cold-rolled steel strips through ERW welding, followed by hot-dip galvanizing. Engineered specifically for construction structures and engineering applications, it combines high strength, superior corrosion resistance, and precision dimensions-an ideal choice for modern steel structure buildings.

Core Advantages

1. Dual Corrosion Protection

Hot-dip galvanized coating thickness reaches65μm+(double-sided for welded tubes), with corner coating ≥45μm and average coating up to 85μm. Compared to uncoated steel pipes, corrosion resistance lifespan extends20%-30%in salt spray tests. The bonding strength between zinc coating and substrate reaches ≥3.5N/mm², effectively preventing peeling at weld points.

2. ERW Welding Technology

ERW technology ensureshigh-strength, low-defectwelds with tensile strength reaching370MPa +(compliant with ASTM A500). Weld seam defects are reduced by approximately 40% compared to traditional methods. Dimensional tolerance± 1%ensures precision for prefabricated assembly.

3. Superior Structural Performance

Made from high-quality structural steel grades Q195-Q355 (S195-S355JR), section sizes covering squares10×10mm to 600×600mm. Thick-wall design withstands higher load pressures, meeting heavy-duty structural requirements.

Technical Specifications

Applications

Building & Construction: Steel structure workshops, stadiums, warehouses, high-rise building supports, glass roofs, curtain wall frames

Infrastructure: Bridge structures, fence posts

Industrial Manufacturing: Machinery frames, racking systems, conveying pipelines, hydraulic cylinder structural components

Transportation & Municipal: Truck frames, bus skeletons, subway components, bus shelters, kiosks

Quality Certifications

ISO 9001 Quality Management System

CE Certification (EU Construction Products Regulation)

PED 2014/68/EU Pressure Equipment Certification

100% Ultrasonic Testing (UT) and third-party inspection reports available

Why Choose Us?

Large-Scale Production: Multiple professional ERW and hot-dip galvanizing production lines with sufficient monthly supply capacity.

Full-Process Quality Control: CNAS-accredited lab testing, strict inspection from raw materials to finished products

Flexible Customization: Dimensions, length, wall thickness, and zinc coating thickness all customizable

Global Service: Products comply with ASTM, EN, JIS, GB and other international standards, exported worldwide

ERW Hot-Dipped Galvanized Rectangular Steel Tube for Construction - Engineering a Century of Quality with Superior Corrosion Resistance and Precision Welding.