Tianjin Brisk Metalwork Co., Ltd. is one of the leading manufacturers and suppliers of en 10219 square hollow section in China. We have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy bulk durable en 10219 square hollow section from our factory.
What Do We Supply Under EN 10219 Square Hollow Section?
Size range: 20x20mm to 500x500mm. Wall thickness: 1.2mm to 16mm. Standard lengths: 6m and 12m, custom lengths on request.
Grades supplied: S235JRH, S275J0H/J2H, S355J0H/J2H/K2H, S460NH. Surface finish: black mill finish, hot-dip galvanized, or painted/primed. Every lot ships with an EN 10204 3.1 mill test report.
The reason buyers order square over rectangular: a square section carries equal moment of inertia and equal radius of gyration on both axes. There is no weak axis to check, no weaker direction to oversize for. For columns and frame members exposed to load from more than one direction - corner columns, wind and seismic frames, biaxially loaded members - this is why square is specified, and it is why we keep this as a core product line rather than a cut-to-size sideline.
Why Order Columns and Frame Members From Us Specifically?
Squareness is controlled in our production, not left to the mill tolerance band on paper.
- Strip width verified before forming - the flat strip is slit to the calculated width and checked before it enters the mill.
- In-line laser dimension checks after welding and sizing - we measure leg length and diagonal on every run, catching any diamonding (corners drifting off 90 degrees) before the cut-off saw.
- Corner radius held consistent at approximately 2x wall thickness - this keeps fitted section properties and coping fit-up predictable order to order.
We log this data by lot. Ask for the squareness inspection report with your quote if your project has tight base-plate or gusset-plate alignment requirements - we include it alongside the mill test report at no extra cost.
What this prevents on your job site: a fabricator ordering column sections from another mill received a 200x200x8mm batch with nearly 3mm of diagonal variance. Base-plate bolt holes did not sit square to the column face, and the erection crew field-reamed every base plate across 18 columns - about 2.5 labor-days lost on a problem that should never reach the site. We build the check in before shipment so you don't inherit it.
Can You Deliver Sections Ready for Connection - Not Just Raw Tube?
Yes. We run in-house processing so your shop does less cutting, coping, and drilling before erection.
- Welded gusset plate connections - we can supply the tube pre-slotted to your gusset dimensions for truss chord-to-diagonal joints.
- Bolted flange plate connections - end plates welded on and bolt-hole pattern drilled to your connection drawing, for column bases and field-boltable beam-to-column joints.
- T, K, Y node connections - factory-cut miters and node profiles for triangulated trusses and space frames, cut from your DXF/DWG file on our CNC plasma or laser line.
- Matched gusset plate material - order the flat plate for your gussets from us in the same shipment, cut to your dimensions, in the same or a compatible grade.
Send us the fabrication drawing and we quote the processed price next to the raw tube price - most buyers who compare the two find factory processing costs less than field cutting once labor and rework risk are counted in.
EN 10219 Square Hollow Section - Standard Capability
| Item | Our Range |
|---|---|
| Size range | 20x20mm to 500x500mm |
| Wall thickness | 1.2mm to 16mm |
| Standard length | 6m / 12m (custom on request) |
| Grades | S235JRH, S275J0H/J2H, S355J0H/J2H/K2H, S460NH |
| Surface finish | Black, hot-dip galvanized, painted/primed |
| Processing | CNC cutting, coping, end-facing, slotting, drilling |
| Certification | EN 10204 3.1, mill test report per lot; squareness inspection report on request |
FAQ
Q: Can you cut gusset slots and bolt holes to our own structural drawings before shipment?
A: Yes - send the DXF or DWG file with slot and hole positions and we return a quote covering both the raw tube and the processing, so you can compare it directly against doing the work in your own shop.
Q: Will galvanizing after fabrication affect our bolted flange-plate holes?
A: Coating thickness (typically 45-85 microns) adds to hole clearance if drilling happens before galvanizing. Tell us your sequence - drill-then-galvanize or galvanize-then-drill - before we quote, and we will size and place the holes to match.
Q: Can you supply the gusset plate material with the tube in one order?
A: Yes - flat plate cut to your gusset dimensions, in the same or a compatible grade, shipped together with the tube so you are not sourcing connection material from a second supplier.
Q: Do you provide squareness data, or only the standard mill test report?
A: Both, on request. The mill test report covers chemistry and mechanical properties; the squareness inspection log (leg length and diagonal per lot) is available alongside it - ask for it when you request your quote.
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