Tianjin Brisk Steel is one of the manufacturers of EN 10219 Hollow Structrual Section / EN 10219 Square Hollow Section / EN 10219 RHS Rectangular Hollow Section / EN 10219 CHS Circular Hollow Section in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
PRODUCT
Tianjin Brisk Steel focus on produce and supply hollow section and steel pipe
Standard & Grade
1. Confirm strict compliance with full EN 10219 series: EN 10219-1 (delivery condition) + EN 10219-2 (dimension & tolerance)
2. Grade verification: S235JRH / S275J0H / S355J0H / S355J2H
- Check minimum yield strength, tensile range, Charpy impact temperature (-20℃ for J2 grade)
- Carbon equivalent CEV ≤0.45% for guaranteed weldability (mandatory in EN 10219)
3. Cross-standard equivalence comparison
- Match with EN 10210 hot-finished HSS, ASTM A500 Gr.B/C, IS 4923, GB/T 6728
- Clarify difference between cold-formed (EN10219) & hot-finished (EN10210) to avoid project rejection
| Comparison Item | EN 10219 Cold-formed Welded | EN 10210 Hot-finished |
|---|---|---|
| Forming Method | Room-temperature cold bending + ERW welding | High-temperature hot extrusion/hot rolling (seamless available) |
| Surface Condition | Smooth, no oxide scale | Rough hot-rolled oxide scale |
| Wall Thickness Tolerance |
Square and Rectangular: W.T ≤ 5 mm ± 10% / W.T ＞ 5mm ±0.5 mm Circular: For D ≤ 406.4 mm: T ≤ 5 mm ± 10%; T ＞ 5mm ±0.5 mm / For D ＞ 406.4 mm: ±10 % with a maximum of ±2 mm |
-10% |
| Low-temperature Toughness | Average, not suitable for extreme cold heavy-load scenarios | Excellent, preferred for bridges and heavy-load structures |
| Cost | Lower, abundant spot inventory | Higher |
| Applicable Scenarios | Curtain walls, light/medium-load frames, equipment brackets, steel structure auxiliary materials | Bridges, heavy-duty factories, low-temperature pressure-bearing structures |
4. Applicable working environment matching
- Indoor dry projects: S235JRH cost-effective
- Outdoor normal climate: S275J0H / S355J0H
- Low-temperature, coastal, dynamic load: S355J2H
Global Equivalent Standards (Commonly Used by Overseas Customers)
- US Standard: ASTM A500 Grade B/C (North American alternative selection)
- Chinese National Standard: GB/T 6728 Cold-formed hollow structural sections (domestic equivalent)
- Indian Standard: IS 4923 Cold-formed square and rectangular tubes
Application Matching & Engineering Technical Support
Clients consult suppliers for project suitability:
- Load-bearing classification: light frame / medium structure / heavy dynamic load
- Environmental adaptability: inland dry, coastal salt fog, low-temperature winter regions
- On-site processing performance: weldability, drilling, cutting, bending
- Engineering calculation support: sectional property data sheet for structural design software
- Substitution scheme recommendation (cost-saving equivalent grade/size suggestions)
Raw Material & Manufacturing Process Control
1. Raw steel coil traceability
- Require heat number, ladle analysis from upstream steel mill
- Ban recycled inferior scrap raw material
2.Cold-forming production flow audit
- Room temp roll forming + high-frequency ERW longitudinal welding
- Confirm no hot forming (critical distinction from EN 10210)
- Cold work hardening control; stress relief treatment for heavy load projects
3. Weld quality inspection standards
- Weld tensile strength ≥90% of base metal
- Mandatory NDT for weld seam: MT magnetic particle test to EN ISO 17638 Class II
- No crack, porosity, incomplete fusion on weld line
4. Batch sampling rules: mechanical test sampling rate ≥8% per heat
Surface Treatment & Anti-Corrosion Solutions
- Black oiled (mill finish): temporary anti-rust, indoor usage
- Pickled & oiled: smooth surface for painting later
- Hot-dip galvanized HDG: Z200–Z600 g/m², coastal/outdoor heavy corrosion resistance
- Check zinc coating thickness uniformity, no bare spot, no excessive zinc spangle
- Custom options: powder coating, primer painting Inspection points: surface free of dent, scratch, fold, pitting, rust, uneven weld bead
FAQ
Q: Can you arrange third-party inspection before shipment?
A: Yes, we fully cooperate with SGS, BV, TÜV and other global inspection bodies for dimension, mechanical and NDT witness tests.
Q: What is your MOQ and standard delivery length for EN 10219 HSS?
A: Our minimum order quantity is 25 tons. Standard factory lengths are 6m and 12m, and we support free custom cutting to any required length. Mixed sizes can be loaded in one container to meet small-batch demands.
Q: How long is your production lead time?
A: Common sizes S235/S355 cold formed tubes are in stock with 3-7 days delivery. Custom large-size, thick-wall or hot-dip galvanized orders take 15-25 working days based on order volume.
Q: Can EN 10219 HSS replace hot finished EN 10210 pipes directly?
A: Not for all projects. EN 10219 cold formed tubes have looser wall thickness tolerance and slightly lower low-temperature toughness. We suggest EN 10210 for heavy-load bridges and extreme cold regions; EN 10219 works better for curtain walls, factory frames and light structures with cost advantages.
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