Square Steel Pipe with Q195 pipe

High-Quality ERW Square and Rectangular Steel Tubes – Precision Engineered for Global Construction & Industrial Applications

Manufactured by China’s leading steel pipe producer, our precision-engineered electric resistance welded (ERW) square and rectangular hollow sections are designed to meet the most demanding structural requirements across international markets. With an annual production capacity of 15 million tons and over $5 billion in global sales, we offer a comprehensive range of cold-formed steel Tubing solutions tailored for durability, strength, and cost-efficiency. Our products comply with internationally recognized standards such as ASTM A500/A501, EN 10219, JIS G3466, DIN 2240, AS 1163, and GB/T specifications—ensuring seamless integration into global infrastructure projects.

Key features include high tensile strength ranging from Q195 to Q690 MPa, customizable dimensions from 10x10mm to 1000x1000mm, and wall thicknesses up to 60mm for heavy-duty applications. Each batch undergoes rigorous quality control under ISO 9001, ISO 14001, and ISO 45001 certifications, guaranteeing compliance with environmental and safety benchmarks. Whether you need standard sizes or custom configurations, our advanced manufacturing lines—including 59 black ERW pipe units, 10 galvanized production lines, and 3 spiral welding systems—ensure consistent performance and rapid delivery.

Our inventory includes a wide selection of square and rectangular tubes in stock, including popular sizes like 20x20mm, 40x40mm, 60x60mm, 100x100mm, and larger profiles up to 500x500mm. Wall thicknesses vary from 1.2mm for light-duty framing to 15.75mm for load-bearing structures, making these products ideal for both commercial and industrial use. Galvanized variants provide corrosion resistance for outdoor environments, while carbon steel options ensure excellent weldability and mechanical properties. The versatility of our offerings supports applications in building frameworks, bridge components, scaffolding, machinery frames, and more.

These structural steel tubes are widely used in construction projects worldwide—from residential buildings and warehouses to transportation infrastructure and utility poles. They serve as essential elements in modular construction, where speed, accuracy, and material efficiency matter most. Their compatibility with modern fabrication techniques, such as laser cutting and CNC bending, further enhances their appeal for engineers and contractors seeking reliable, pre-engineered solutions.

Customers globally praise the balance of quality, affordability, and on-time delivery. Many highlight how our consistent product uniformity reduces waste during installation and minimizes rework. Others appreciate the ability to order both standard and non-standard sizes without compromising lead times—a critical advantage for time-sensitive projects in Europe, North America, the Middle East, and Southeast Asia.

Common inquiries often center around material grades, surface finishes, and customization options. While some clients ask about fire-resistant coatings or powder finishing, others seek guidance on selecting the right yield strength for seismic zones or high-wind regions. We recommend consulting technical data sheets for specific alloy compositions and stress tolerances based on project needs. For bulk orders, we offer tailored packaging, export documentation, and logistics support to streamline international procurement processes.