S690QH/S690QLH/S690QL1H Steel Pipe, Square Tube, Rectangular Tube / Q690C/Q690D/Q690E Pipe

Leading a New Era of Green Buildings & High-Strength Structures — S690QH/S690QLH/S690QL1H
Advanced High-Performance Steel Hollow Structural Sections

With cutting-edge innovative technology, Peakkong Special Steel adopts high-power laser hybrid welding technology to overcome the technical bottlenecks of easy distortion and poor penetration in ultra-high strength steel tubes. We achieve mass production of high-precision, high-performance S690QH/S690QLH/S690QL1H advanced high-performance steel hollow structural sections (square tubes, circular tubes, rectangular flat tubes).

This product range fully complies with the latest European standards for high-strength hollow structural sections: EN 10210-3 (hot finished / heat-treated) and EN 10219-3 (cold formed / quenched & tempered). Our welding procedures are certified by SGS, TÜV and DNV, delivering unmatched safety and quality assurance for major domestic and overseas projects.

Product Supply Scope & Technical Specifications
Using high-precision laser hybrid welding technology, Peakkong Special Steel supplies a full range of tubular profiles. Weld seams meet strict technical requirements of full penetration and equal strength.

Square Hollow Sections (SHS)
Size range: 50mm–500mm
Wall thickness (T): 5mm–30mm

Rectangular Hollow Sections (RHS)
Size range: 80×40mm to 500×300mm
Wall thickness (T): 5mm–30mm

Circular Hollow Sections (CHS)
Outer diameter range: 89mm–813mm
Wall thickness (T): 5mm–30mm

> Note: Peakkong Special Steel’s new custom tube production line removes minimum order quantity constraints. Even small batches of special sizes for R&D or small-scale infrastructure projects can be scheduled and delivered quickly.

Advantages of S690QH/S690QLH/S690QL1H Hollow Structural Sections
Ultra-lightweight design, high precision with zero distortion, top-tier certifications, international code compliance, excellent low-temperature impact toughness, superior torsional stiffness and attractive surface finish.

Typical Applications of S690QH/S690QLH/S690QL1H Hollow Structural Sections
Spatial trusses and long-span venues, giant bracing members for high-rise buildings, offshore engineering and offshore wind power, heavy lifting and transport machinery.

Contact Us
If you are designing or sourcing materials for complex steel structures, large infrastructure, high-rise buildings or offshore projects, and aim to reduce weight, cut costs and lower carbon emissions via steel grade upgrading:

If you want to learn more about advanced high-strength hollow structural sections, please feel free to contact us!
Peakkong Special Steel provides advanced, safe, globally certified one-stop solutions for special steel tubular products.