Tianjin Brisk Steel is one of the manufacturers of EN 10219 S355JR Steel Pipe 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.
the EN 10219 S355JR Designation
EN 10219 S355JR (CHS Structural Hollow Section)
- Standard origin: European EN standard for cold-formed welded structural tubes
- Design target: Bear static & dynamic structural loads, not pressure fluid transport
- Full designation: EN 10219-1/-2 S355JRH (H = Hollow section)
- Main use: Building columns, lamp poles, scaffolding, fence posts, bridge frames, solar brackets, galvanized construction poles (your Bulgaria project)
Material Grade & Mechanical Performance
- Yield strength (t ≤16mm): Min 355 MPa
- Tensile range: 490–630 MPa
- Impact test: 20°C Charpy ≥27J (only room temp toughness required)
- Elongation ≥20%
- Naming rule: S=Structural, 355=yield value, JR=20℃ impact guarantee
Manufacturing & Weld Inspection Rules
- Production: Cold-bent ERW high-frequency welded only; no seamless tube scope
- Weld inspection: Visual + simple UT spot check; no full-length automatic ultrasonic scanning
- No mandatory hydrostatic pressure test for all pieces (only batch sampling)
- Dimensional tolerance focused on straightness, flatness for structural assembly
Surface & Anti-Corrosion
- Bare black finish or hot-dip galvanized for outdoor construction
- No internal anti-corrosion coating requirement (no fluid contact)
ERW PROCESS
Technical Specifications & Size Portfolio
| Parameter | Specifications & Capabilities |
| Standard Compliance | EN 10219-1 (Technical Delivery Requirements), EN 10219-2 (Tolerances & Dimensions) |
| Steel Grade & Mat. Number | S355JR (Material Number: 1.0045) |
| Outer Diameter (OD) | 21.3mm up to 610mm (1/2" to 24") |
| Wall Thickness (WT) | 2.0mm to 20.0mm (Custom schedules available) |
| Standard Lengths | 5.8m (20ft container optimized), 6m, 11.8m, 12m, or custom fixed cuts |
| End Configuration | Square Cut Plain Ends (Deburred) or Precision Factory Beveled Ends |
Frequently Asked Questions (FAQ)
Q: What is the primary difference between S355JR and S355J2H steel grades under the EN 10219 standard?
A: The core distinction centers on impact testing temperatures and the application scope. S355JR requires mandatory impact testing at room temperature (+20°C) absorbing a minimum of 27 Joules, making it highly cost-effective for indoor frameworks or temperate outdoor structures. S355J2H mandates impact testing down to -20°C and includes a mandatory "H" designation for certified hollow sections, making it optimized for severe sub-zero climates or dynamic, fracture-critical offshore engineering.
Q: Can EN 10219 S355JR structural steel round pipes be utilized as high-pressure fluid pipelines?
A: No. EN 10219 is a dedicated structural standard optimized for structural engineering, architectural framing, and load-bearing columns. It does not require mandatory hydrostatic pressure testing during the mill line production. If your project involves transporting high-pressure water, gas, or hydrocarbons, you must specify pressure-rated piping standards such as EN 10217 or API 5L, which enforce high-pressure fluid holding tests.
Q: How does your mill protect structural round steel pipes from corrosion during long ocean transit?
A: To protect the raw mild steel from high humidity and salt-laden sea air during maritime transport, we treat 100% of our export pipes with a high-affinity water-resistant anti-rust oil or light black varnish coating. For maximum longevity in aggressive outdoor or coastal environments, we highly recommend specifying our factory Hot-Dip Galvanized (HDG) finish, which creates a metallurgical zinc barrier that prevents oxidation for decades.
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