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Product Overview and Technical Specifications
| Item | Specification |
|---|---|
| Product Name | Structural LSAW Steel Pipe |
| Standard | EN 10219-1 / EN 10219-2 |
| Steel Grade | S355J2H |
| Manufacturing Process | LSAW (JCOE Forming) |
| Diameter Range | 406 mm – 1626 mm |
| Wall Thickness | 6 mm – 40 mm |
Huayang manufactures EN10219 S355J2H LSAW pipes for heavy structural applications, ensuring high load-bearing capacity, dimensional stability, and reliable weld integrity.
Material Characteristics and Production Control
S355J2H is a non-alloy structural steel grade with a minimum yield strength of 355 MPa for thickness up to 16 mm and tensile strength between 470–630 MPa. The "J2" designation requires a minimum impact energy of 27 J at –20°C, providing reliable toughness for exposed structural conditions. The "H" indicates suitability for hollow sections with controlled chemical composition and weldability. Typical limits include C ≤0.24%, Mn ≤1.60%, P ≤0.035%, and S ≤0.035%.
Huayang adopts JCOE forming and double-sided submerged arc welding to ensure consistent seam quality and precise geometry in large-diameter structural pipes. Each pipe undergoes ultrasonic inspection of the weld seam, dimensional measurement, and mechanical testing according to EN10219 requirements. Strict control of ovality, straightness, and wall thickness ensures structural stability in bridges, industrial buildings, offshore platforms, and foundation piling projects.
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