Main structure widely used in portal steel frame and space frame structure
Our H-section steel products are engineered to deliver superior load-bearing capacity and structural stability, making them ideal for a wide range of construction scenarios:
Long-span factory buildings, heavy-duty plant structures
High-rise building frames, mezzanine floor systems
Bridge girders, transmission towers, offshore platforms
Aircraft hangars, logistics warehouses exceeding 30m spans
The production of H-section steel components follows a rigorous 6-stage manufacturing protocol:
| Stage | Process | Technical Specifications |
|---|---|---|
| Precision Cutting | - CNC plasma cutting machines | ±1.5mm dimensional tolerance | EN 1090-2 compliant edge preparation |
| Drilling Operations | - CNC multi-spindle drilling rigs | Hole position accuracy ≤0.8mm | Burr-free hole surfaces |
| Assembly Jigging | - Laser-aligned positioning system | Automatic clamping force control (20-50kN) | Gap tolerance ≤1.0mm |
| Automated Welding | - Submerged arc welding (SAW) systems | AWS D1.1 certified procedures | 100% full-penetration welds |
| Surface Preparation | - SA 2.5 grade shot blasting | Surface profile 50-100μm | ISO 8501-1 compliant cleanliness |
| Coating Application | - Three-coat epoxy/polyurethane system | DFT 220-280μm | ISO 12944 corrosion protection |
Our multi-tiered quality control system ensures compliance with international standards:
Mill test certificates (EN 10204 3.1/3.2)
Chemical composition verification (spectral analysis)
Ultrasonic testing for laminations (ASTM A435)
Laser scanning for web/flange alignment (≤L/1000)
Straightness tolerance: 3mm per 3m length
Visual inspection (AWS B1.11)
20% RT/UT random testing (ASME Section V)
Macro-examination of weld cross-sections
Dry film thickness verification (ISO 2808)
Adhesion testing (ASTM D4541) ≥5MPa
Holiday detection (ASTM D5162)
Segmented fabrication enables easy assembly on-site, reducing construction time by 30-40%
Compact sections (max 15m length) optimized for road/rail shipping, minimizing logistics costs
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