High Quality Steel Square Pipe

High-Quality Hollow Steel Sections & Scaffolding Tubes for Global Construction and Industrial Applications

Explore our comprehensive range of premium hollow structural sections and scaffolding tubes, engineered to meet international standards for durability, strength, and versatility across diverse industries. These carbon steel products—available in square, rectangular, round, triangular, hexagonal, and elliptical profiles—are ideal for both structural integrity and aesthetic design in modern infrastructure projects worldwide.

Manufactured using advanced Electric Resistance Welding (ERW) and seamless hot-rolled or cold-formed processes, each product undergoes rigorous quality control, including chemical composition analysis, mechanical testing (tensile strength, yield point, elongation), and dimensional inspections. Whether you're building a bridge, designing modular furniture, or constructing temporary scaffolding systems, these tubes deliver consistent performance under varying environmental conditions.

Key Features

• Compliance with multiple global specifications: ASTM A500, EN 10219, GB/T 6728, BS 1387, JIS G 3466, and more
• Wide selection of grades: Q235, S355, Gr B/C (ASTM A500), DC03, SPHD, and others
• Customizable dimensions: From 10mm x 10mm to 500mm x 500mm square sections; wall thickness from 0.5mm to 20mm
• Lengths up to 18 meters, tailored to project requirements
• Multiple surface finishes: Hot-dip galvanized, electro-galvanized, black painted, bright annealed, or black annealed
• Robust packaging: Plastic plugs at both ends, hexagonal bundling (max 2,000kg per bundle), waterproof wrapping, PVC sleeves, and sackcloth protection

Detailed Specifications

Hollow sections are available in various cross-sectional geometries, including square, rectangular, round, and specialized shapes such as triangular and hexagonal, making them suitable for architectural features, load-bearing frameworks, and decorative elements alike. The outer diameter of scaffolding tubes ranges from 38mm to 48.6mm, with wall thicknesses between 2.0mm and 4.0mm—ideal for supporting heavy loads in construction sites and industrial setups. All products adhere to strict tolerances for straightness, squareness, twist, and convexity/concavity, ensuring precision during assembly and long-term stability.

For example, mechanical-size tubes maintain a maximum corner tolerance of ±0.004 inches for smaller dimensions, while structural sizes allow ±0.020 inches for larger profiles. Wall thickness deviation is limited to ±10% of nominal value, and twist limits vary based on section size—from 0.050 inches for small diameters to 0.100 inches for larger ones. These precise parameters ensure reliable fitment and minimal deformation under stress.

Application Scenarios

These hollow steel sections find extensive use in sectors like civil engineering, transportation, manufacturing, agriculture, logistics, and public infrastructure. In construction, they serve as beams, columns, balustrades, and partition walls in residential buildings, airports, and marine structures. Automotive manufacturers utilize them for chassis components and body frames. Industrial applications include solar mounting systems, mining equipment, material handling conveyors, and offshore platforms. Traffic engineers rely on them for guardrails, signage supports, and pedestrian walkways. Additionally, they’re widely adopted in furniture design, sports facilities, greenhouse structures, and storage racks due to their high strength-to-weight ratio and corrosion resistance when properly coated.

User Testimonials

Customers from Europe, North America, and Southeast Asia consistently praise the reliability and adaptability of these tubes. One client noted, “We used the EN 10219-compliant square hollow sections for an elevated walkway project in Germany—the weldability and uniform finish made installation efficient and visually appealing.” Another stated, “The scaffolding tubes met all safety standards for our warehouse expansion in Canada, and the galvanized coating has held up perfectly after two years outdoors.”

Frequently Asked Questions

What makes this product different from standard steel Tubing? This product complies with internationally recognized standards like ASTM A500 and EN 10219, offering superior consistency in mechanical properties and dimensional accuracy compared to generic alternatives.

Can I request custom lengths or coatings? Yes, we offer customized production runs based on customer specifications, including special surface treatments like zinc plating or powder coating for enhanced weather resistance.

Are there any limitations for outdoor use? With proper galvanization or painting, these tubes perform excellently in humid, salty, or corrosive environments—common in coastal regions or industrial zones.

How do I verify compliance with local regulations? Each batch includes a Mill Test Certificate (EN 10204/3.1B), confirming adherence to required chemical and physical properties, which can be submitted to authorities or third-party inspectors.