Square Steel Pipe with Q195

Square and Rectangular Steel Pipes – High-Quality ERW Steel Tubes for Global Industrial Applications

Manufactured by one of China’s leading steel pipe producers, our square and rectangular steel pipes are engineered for superior strength, precision, and durability. With an annual production capacity of 15 million tons and global sales exceeding $5 billion, our company stands as the largest manufacturer of electric resistance welded (ERW) square, rectangular, hollow, galvanized, and spiral welded steel pipes in China. These products meet international standards such as ASTM A500/A501, JIS G3466, EN10219, EN10210, BV, DIN2240, AS1163, GB/T9711, GB/T3091, GB/T3094, and GB/T6728—ensuring compliance with rigorous engineering specifications worldwide.

Our advanced manufacturing process includes 59 black ERW pipe lines, 10 galvanized pipe lines, 3 spiral welded pipe lines, and a dedicated JCOE LSAW Steel Pipe line. This infrastructure enables us to produce square and rectangular tubes ranging from 10x10x0.5mm up to 1000x1000x60mm, and rectangular pipes from 10x15x0.5mm to 800x1100x60mm. Wall thicknesses vary from 1.2mm to 15.75mm, with yield strengths spanning Q195 to Q690 MPa, making our products suitable for structural, mechanical, and pressure applications across diverse industries.

Key features include consistent dimensional accuracy, excellent surface finish, corrosion resistance (especially in galvanized variants), and high tensile strength. All products undergo strict quality control and are certified under ISO9001, ISO14001, ISO45001, BC1, EPD, and PHD—ensuring environmental responsibility, safety, and performance excellence. Our extensive inventory ensures rapid delivery, even for urgent orders, supporting just-in-time supply chains globally.

These square and rectangular steel tubes are ideal for construction projects such as scaffolding, bridge frameworks, and building supports; industrial equipment like conveyor systems, machinery frames, and storage racks; and infrastructure developments including fencing, guardrails, and utility poles. Their versatility makes them a preferred choice for engineers, architects, and procurement managers seeking reliable, cost-effective materials that meet global technical requirements.

Customers around the world have praised the consistency, weld integrity, and long-term performance of our square and rectangular steel pipes. Many highlight the ease of fabrication, compatibility with welding techniques, and ability to withstand harsh environments—from coastal climates to heavy-duty manufacturing settings—without premature degradation.

Common questions often revolve around customization options, material certifications, lead times, and suitability for specific load-bearing or corrosive conditions. We offer tailored solutions based on client needs, whether it's adjusting dimensions, selecting alloy grades, or applying protective coatings like zinc galvanizing or powder coating. Most standard sizes are available in stock at 6 meters, while custom lengths and specifications can be produced efficiently through our flexible production system.