Large Diameter LSAW High Strength Structural Steel Pipe – Industrial Plant Grade
Product Overview
Large diameter LSAW (Longitudinal Submerged Arc Welded) high strength structural pipe is the standard heavy structural material for industrial and infrastructure applications. Manufactured by JCOE forming and double-sided submerged arc welding, it delivers consistent dimensional accuracy, uniform wall thickness and reliable weld quality in large diameters that are not economical to produce as seamless pipe. This industrial grade is optimized for plant columns, large trusses and heavy infrastructure projects.
Why Choose CNB LSAW Structural Pipe?
Our LSAW structural pipes are manufactured on advanced JCOE production lines with strict control over weld quality, dimensional accuracy and straightness. Every weld undergoes 100% NDT inspection to ensure full penetration and defect-free quality. We offer a full range of strength grades and anti-corrosion coating options, with custom cutting and end preparation to match specific project requirements.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | LSAW High Strength Structural Steel Pipe |
| Steel Grade | Q355B / Q420B / S355J2H |
| Manufacturing Process | Longitudinal submerged arc welded (JCOE) |
| Outer Diameter Range | 406mm – 1422mm |
| Wall Thickness Range | 6mm – 60mm |
| Standard Lengths | 12m / 18m / 24m, custom |
| Surface Condition | Black mill finish, coated option |
| Weld Inspection | 100% UT + RT inspection |
| Applicable Standards | GB/T 3091, EN 10219, API 5L structural |
| Minimum Yield Strength | ≥355MPa (Q355B) / ≥420MPa (Q420B) |
Core Advantages
- Large diameter capability: Cost-effective production in sizes beyond seamless pipe range.
- Consistent weld quality: Full NDT inspection guarantees reliable structural welds.
- Long length options: Reduces field joints and speeds up project construction.
- Coating options: Full range of anti-corrosion coatings for outdoor and buried service.
- Industrial proven: Standard material for power plant and industrial structural projects.
Applications
This LSAW high strength structural pipe is widely used for industrial plant columns, large span trusses, pipe rack supports, bridge piers, wind turbine towers and heavy infrastructure projects.
Get a Quotation
We supply LSAW structural steel pipes in various diameters, grades and wall thicknesses with custom coating and fabrication options. Weld quality reports and project-specific certification are available upon request. Contact our industrial structural team for a detailed project quotation.
