What Are Large ERW Rectangular Tubes?

• Large ERW (Electric Resistance Welded) Rectangular Tubes are heavy-gauge hollow structural sections (HSS) manufactured through high-frequency electric resistance welding technology. Differing from small and medium-sized rectangular steel tubes, our large ERW rectangular tubes feature oversized section dimensions, thick wall thickness, and superior structural stability, making them a core heavy-duty building and industrial steel material for large-scale engineering projects.

 Core Manufacturing Technology (ERW Welding Process)

• Our large ERW rectangular tubes adopt advanced high-frequency electric resistance welding production technology, strictly following international manufacturing standards to ensure uniform weld quality and overall structural integrity. The entire production process includes raw material inspection, hot rolling leveling, continuous forming, high-frequency welding, weld seam trimming, cooling shaping, fixed-length cutting, and surface finishing.

• Compared with traditional welded tubes, ERW welding technology features concentrated heating, fast forming, and smooth weld seams. The weld zone of our large rectangular tubes achieves metallurgical integration with the base steel, with no trachoma, crack, or deformation defects. The overall mechanical properties of the tube body are consistent, avoiding local stress concentration. All products undergo strict non-destructive testing (NDT) on weld seams to guarantee 100% welding qualification rate, meeting heavy-load and long-term service requirements of large engineering projects.

Complete Product Specifications & Standard Compliance

• We provide a full range of customized and standard large ERW rectangular tube specifications, covering ultra-large section sizes to meet diverse heavy-duty application scenarios. All products comply with mainstream international industry standards, supporting global project acceptance and engineering certification.
• Key Specification Range
  • Section Size: 200×100mm – 600×400mm, supporting ultra-large custom dimensions
  • Wall Thickness: 6.0mm – 20.0mm heavy thick wall series
  • Length: 6m, 9m, 12m fixed length, customizable random lengths
  • Surface Treatment: Black oil finish, hot-dip galvanized, pre-galvanized, painted anti-rust treatment
• Compliant International Standards
  • ASTM A500, ASTM A618, EN 10219, EN 10210, JIS G3466, GB/T 6728, fully adapting to North American, European, Southeast Asian, and Middle Eastern engineering standard requirements.

Unique Product Advantages of Large ERW Rectangular Tubes

• Superior Structural Performance: As closed hollow structural sections, large ERW rectangular tubes feature high section modulus and strong anti-bending and anti-torsion capabilities. Under the same weight, they provide higher structural stiffness and load-bearing capacity than open steel profiles, effectively reducing the overall steel consumption of projects and optimizing structural stress distribution. The integrated tube body structure resists deformation and pressure, suitable for long-span and heavy-load engineering scenarios.
• Excellent Weld & Surface Quality: Precision high-frequency ERW welding ensures flat and smooth weld seams without bulges or depressions. The tube surface is clean and uniform with precise dimensional tolerance (length, width, wall thickness, straightness). No secondary trimming is required for most installation scenarios, greatly improving on-site construction efficiency. Hot-dip galvanized versions deliver outstanding anti-corrosion and anti-rust performance, extending service life in outdoor and harsh environments to over 30 years.
• High Cost-Effectiveness & Easy Processing: Compared with seamless rectangular tubes, large ERW rectangular tubes have lower production costs with equivalent structural performance, balancing quality and project budget perfectly. The products support cutting, drilling, bending, welding, and other deep processing, with good machinability and adaptability to customized processing requirements of mechanical equipment and special structural frames.
• Strong Weather Resistance & Stability: Made of high-purity raw steel with stable chemical composition and mechanical properties, our large ERW rectangular tubes resist low-temperature brittleness and high-temperature deformation. They adapt to extreme weather conditions such as high temperature, heavy rain, freezing, and salt spray, suitable for outdoor infrastructure, marine engineering, and alpine region projects.

Wide Industrial Applications

• Thanks to their oversized section, heavy load capacity, and high stability, large ERW rectangular steel tubes are widely used in global heavy engineering and industrial manufacturing fields, becoming indispensable core structural materials:
  • Building Construction Engineering: High-rise building frame structures, factory workshop main columns, steel structure warehouses, stadiums, exhibition centers, and large-span roof support systems
  • Infrastructure Construction: Bridge auxiliary structures, highway guardrails, viaduct supports, municipal engineering steel structures, and port terminal infrastructure
  • Mechanical Equipment Manufacturing: Large mechanical frames, engineering machinery bases, container supporting structures, and industrial equipment gantries
  • Logistics & Transportation: Truck frame structures, logistics equipment supports, and large storage shelf heavy-duty frames
  • Offshore & Outdoor Projects: Marine platform auxiliary structures, outdoor engineering supports, and corrosion-resistant building frames

Brisk Steel Factory