1. Womic Steel: Manufacturing Capabilities & Company Strength
Womic Steel Group operates multiple LSAW production lines capable of producing structural hollow sections per EN 10219. S355JRH is a cold formed welded structural steel (the "H" suffix indicates impact testing at 0°C, "RH" indicates room temperature impact? Actually EN 10219: S355JRH – J0 for 0°C impact, R stands for room temperature? Let me check: EN 10027: JR = +20°C, J0 = 0°C, J2 = -20°C. S355JRH: J0 + H (hollow section). So impact at 0°C.)
● JCOE Line: For diameters 406mm – 1,422mm (16″–56″), wall thickness up to 50.8mm. Suitable for most structural applications.
● UOE Line: For diameters 508mm – 1,220mm (20″–48″), wall thickness up to 40mm. Produces high roundness for aesthetic architectural exposed structures.
● Rolled Plate (Single Seam): For diameters 600mm – 2,500mm (24″–98″), wall thickness from 25mm up to 80mm. Ideal for heavy wall structural columns and bridge arches.
● Rolled Plate (Double Seam): For diameters 1,200mm – 2,500mm (48″–98″), wall thickness up to 80mm.
Total LSAW capacity exceeds 300,000 tons annually, with structural pipe production exceeding 100,000 tons per year. Womic Steel holds CE marking (EN 10219), ISO 9001, and can supply third-party inspection by SGS, BV, TÜV, and Lloyd's Register. Over 300,000 tons of EN 10219 pipes supplied globally for stadiums, airports, bridges, and industrial buildings.
Production Flexibility for S355JRH:
● JCOE: 406–1,422mm OD × 5.0–50.8mm WT × ≤ 18m
● UOE: 508–1,220mm OD × 5.0–40.0mm WT × ≤ 24m
● Rolled plate (single seam): 600–2,500mm OD × 25–80mm WT × ≤ 18m
● Rolled plate (double seam): 1,200–2,500mm OD × 25–80mm WT × ≤ 18m
Pipes can be supplied with primer coating (zinc-rich epoxy, 40-80 microns) for corrosion protection during shipping and construction.
2. EN 10219 S355JRH: Material Composition & Performance Characteristics
EN 10219 S355JRH is a non-alloy structural steel grade for cold formed welded hollow sections. Minimum yield strength of 355 MPa (51,500 psi) and tensile strength range of 470-630 MPa (68,200-91,400 psi). The grade is suitable for welding, bolting, and riveted connections. "JRH" indicates Charpy impact test at 0°C (27J minimum).
Chemical Composition (cast analysis, max % by mass per EN 10219):
| Element | S355JRH (max %) | Typical Womic Control |
| C | 0.22 | 0.18-0.20 |
| Mn | 1.60 | 1.30-1.50 |
| P | 0.030 | ≤ 0.025 |
| S | 0.030 | ≤ 0.020 |
| Si | 0.55 | 0.25-0.40 |
| N | 0.014 (optional) | ≤ 0.012 |
| CEV | ≤ 0.45 | ≤ 0.42 |
Mechanical Properties (Room Temperature per EN 10219):
| Property | S355JRH |
| Yield Strength (min) for t ≤ 16mm | 355 MPa (51,500 psi) |
| Yield Strength (min) for 16 < t ≤ 40mm | 345 MPa (50,000 psi) |
| Yield Strength (min) for t > 40mm | 335 MPa (48,600 psi) |
| Tensile Strength (range) | 470 – 630 MPa |
| Elongation (min, on 5.65√So) | 20% |
| Impact Toughness (min) @ 0°C | 27 J |
Comparison with other EN 10219 grades:
| Grade | Yield MPa (t≤16mm) | Impact Temp | Typical Application |
| S235JRH | 235 | 0°C | Light structures, secondary members |
| S275JRH | 275 | 0°C | General structural, industrial buildings |
| S355JRH | 355 | 0°C | Heavy structures, bridges, stadiums |
| S355J2H | 355 | -20°C | Low temperature, offshore, arctic |
S355JRH offers the best strength-to-weight ratio among common structural hollow section grades.
3. Dimensional Range & Standards Compliance
| Item | Specification |
| Standard | EN 10219 S355JRH (also S235JRH, S275JRH, S355J2H) |
| Manufacturing Processes | JCOE, UOE, rolled plate (single/double seam) |
| Outside Diameter Range | 219mm – 2,500mm (8″ – 98″) |
| Wall Thickness Range | JCOE/UOE: 5.0mm – 50.8mm; Rolled plate: 25mm – 80mm |
| Length Range | Standard: 6m, 12m, 18m; Extended: up to 24m |
| End Finish | Plain End (PE), Beveled End (BE) for butt welding |
| Surface Finish | Bare, Oiled, Primer coated (zinc-rich epoxy), Hot-dip galvanized |
| Tolerances (EN 10219) | OD: ±1% or ±3mm (whichever larger); WT: ±10% for t≤10mm, ±8% for t>10mm; Length: +200mm / -0mm |
| Straightness | ≤ 0.2% of length |
| Out-of-roundness | ≤ 2% (for structural, less strict than line pipe) |
4. Available Dimensions & Specifications – EN 10219 S355JRH LSAW Steel Pipe (Selected Typical Sizes)
| OD (mm) | WT Options (mm) | Process | Approx Weight (kg/m) | Standard Length | Typical Application |
| 219 | 5.0, 6.0, 8.0, 10.0, 12.5 | JCOE | 26.4 – 63.6 | 12m | Building column |
| 273 | 6.0, 8.0, 10.0, 12.5, 14.0 | JCOE | 39.5 – 89.4 | 12m | Truss chord |
| 324 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0 | JCOE | 47.1 – 121.5 | 12m / 18m | Industrial frame |
| 406 | 8.0, 10.0, 12.5, 14.0, 16.0, 20.0 | JCOE/UOE | 78.5 – 190.4 | 12m / 18m | Bridge arch |
| 508 | 10.0, 12.5, 14.0, 16.0, 20.0, 25.0 | UOE | 122.8 – 297.8 | 12m / 18m | Stadium roof |
| 610 | 12.5, 14.0, 16.0, 20.0, 25.0, 30.0 | UOE | 184.2 – 429.1 | 12m / 18m | Heavy column |
| 711 | 14.0, 16.0, 20.0, 25.0, 30.0, 35.0 | JCOE/UOE | 240.7 – 583.5 | 12m / 18m | Transmission tower |
| 813 | 16.0, 20.0, 25.0, 30.0, 35.0, 40.0 | JCOE | 314.4 – 762.7 | 12m / 18m | Offshore topside |
| 914 | 20.0, 25.0, 30.0, 35.0, 40.0, 45.0 | JCOE/Rolled | 441.0 – 964.8 | 12m / 18m | Bridge pier |
| 1,016 | 20.0, 25.0, 30.0, 35.0, 40.0, 50.0 | Rolled | 491.3 – 1,191.7 | 12m / 18m | Large arch structure |
| 1,220 | 25.0, 30.0, 35.0, 40.0, 50.0, 60.0 | Rolled | 736.5 – 1,716.9 | 12m | Heavy industrial |
| 1,422 | 30.0, 35.0, 40.0, 50.0, 60.0, 70.0 | Rolled (single) | 1,030 – 2,335 | 12m | Mega structure |
| 1,600 | 35.0, 40.0, 50.0, 60.0, 70.0, 80.0 | Rolled (double) | 1,350 – 3,000 | 12m | Bridge tower |
| 2,000 | 40.0, 50.0, 60.0, 70.0, 80.0 | Rolled (double) | 1,933 – 3,784 | 12m | Special architectural |
| 2,500 | 50.0, 60.0, 70.0, 80.0 | Rolled (double) | 3,023 – 4,766 | 12m | Monumental structure |
For structural applications, dimensional tolerances are less strict than API 5L, allowing more economical production for large diameter pipes.
5. Common Standards & Grades – Structural Hollow Sections
| Standard | Steel Grades | Typical Application | Forming Process |
| EN 10219 | S235JRH, S275JRH, S355JRH, S355J2H | Buildings, bridges, towers | JCOE/UOE/Rolled |
| EN 10210 (hot finished) | S235JRH, S275JRH, S355JRH | Heavy structures | Seamless or welded |
| ASTM A500 | GR.B, GR.C | US structural applications | JCOE |
| ASTM A252 | Grade 2, 3 | Foundation piling (also structural) | JCOE/Rolled |
| API 5L | GR.B, X42 | Structural (non-pressure) | JCOE |
| BS 7191 | S275, S355 | Offshore structural | Rolled |
Usage summary: Building frames, bridge arches, stadium trusses, crane booms, transmission towers, offshore topsides, architectural columns, industrial platforms.
6. Manufacturing Processes – LSAW for EN 10219 S355JRH Structural Pipe
For structural applications, weld quality must be sound but aesthetic considerations (smooth weld profile) are sometimes specified for exposed architecture.
JCOE Process (406–1,422mm OD, 5.0–50.8mm WT):
● Standard J-C-O forming
● Inner and outer SAW welding
● Optional weld cap grinding for smooth finish (architectural exposed steel)
● Mechanical expansion (optional – improves roundness)
● Suitable for most structural sections
UOE Process (508–1,220mm OD, 5.0–40mm WT):
● Produces very round pipes – beneficial for visible structures
● Consistent weld geometry
● Used for stadium and airport projects where aesthetics matter
Rolled Plate (Single Seam) for Heavy Wall (600–2,500mm OD, 25–80mm WT):
● 4-roll bending
● Longitudinal SAW welding
● Weld can be ground flush for exposed applications
● No expansion – accept ovality up to 1-2%
Post-weld finishing:
● Weld grinding: For architectural exposed steel, we grind the weld cap flush with the pipe body.
● Primer coating: Zinc-rich epoxy primer (40-80 microns) as standard for corrosion protection.
● Hot-dip galvanizing: Full pipe galvanizing available (up to 12m length, requires special bath).
7. Quality Control & Testing Procedures for EN 10219 S355JRH LSAW Steel Pipe
| Stage | Inspection Method | Purpose |
| Plate | Chemical Analysis | Verify EN 10219 composition |
| Plate | Tensile Test | Verify yield and tensile |
| Plate | Charpy Impact @ 0°C (if required) | Low-temperature toughness |
| In-Process | Dimensional (OD, WT) | Ensure compliance |
| Weld seam | Ultrasonic Testing (100% typical for critical structures) | Detect weld defects |
| Weld seam | RT (spot – 5-10% for general structures) | Weld quality |
| Weld seam | MPI (optional – for fatigue-critical welds) | Surface cracks |
| Finished pipe | Guided Bend Test | Weld ductility |
| Finished pipe | Flattening Test | Pipe body ductility |
| Finished pipe | Visual & Dimensional | Surface, straightness, marking |
For EN 10219, CE marking requires a Declaration of Performance (DoP) and Factory Production Control (FPC) audit.
8. Primary Applications – EN 10219 S355JRH LSAW Steel Pipe
● Steel building frames – Columns, beams, bracing for high-rise and industrial buildings
● Bridge arches and trusses – Arch bridges, tied-arch bridges, truss girders
● Stadium roof structures – Large span trusses, space frames, arch supports
● Transmission towers – Lattice tower legs, monopole bases
● Crane booms and outriggers – Heavy lifting equipment structural members
● Offshore topside modules – Deck support legs, bracing on platforms
● Industrial platforms and walkways – Pipe supports, handrails, walkway beams
● Shipbuilding (structural sections) – Stiffeners, deckhouse supports
● Architectural feature columns – Exposed steel columns with smooth finish
● Wind turbine towers – Onshore tower sections (tapered or straight)
9. Packaging & Shipping – EN 10219 S355JRH LSAW Steel Pipe
Packaging for structural pipes:
● Small diameters (≤ 610mm): Bundled with steel straps (typically 5-10 tons per bundle)
● Large diameters (> 610mm): Individual pipes with wooden dunnage
● Architectural exposed pipes: Wrapped in plastic film to protect primer coating
● End caps: Plastic caps to prevent debris entry (if required)
Shipping:
● Containers for small diameters and short lengths
● Break-bulk vessels for large diameters and heavy wall
● Flat racks for extra-long pipes
● Truck or rail for inland delivery
Documentation: EN 10204 Type 3.1 certificate, CE DoP (if CE marked), dimensional report, UT report, packing list, commercial invoice, COO.
10. Womic Steel Advantages & FAQ – EN 10219 S355JRH LSAW Steel Pipe
Why Womic Steel for EN 10219 Structural Pipe?
● CE marked (EN 10219) with Declaration of Performance
● Large diameter up to 2,500mm (98″) – ideal for monumental structures
● Heavy wall up to 80mm – for high-load columns and bridge arches
● Weld grinding option for exposed architectural steel
● Primer coating and hot-dip galvanizing available
● Third-party inspection (SGS, BV, TÜV) accepted for CE verification
l Over 300,000 tons supplied to European and international projects
Frequently Asked Questions:
Q: What is the difference between EN 10219 S355JRH and EN 10210 S355JRH?
A: EN 10219 is for cold formed welded hollow sections (the welding and forming is done at room temperature). EN 10210 is for hot finished hollow sections (seamless or welded and then heat treated). For LSAW pipes, EN 10219 is the relevant standard. EN 10210 hot finished sections are typically seamless or ERW. Both have similar mechanical properties.
Q: Can you supply S355J2H (impact at -20°C) instead of S355JRH?
A: Yes. S355J2H is available upon request for low-temperature applications such as offshore or arctic structures. The chemical composition is similar but with tighter limits and guaranteed Charpy impact at -20°C (min 27J). Additional cost applies.
Q: Do you provide CE marking for EN 10219 pipes?
A: Yes. Womic Steel has Factory Production Control (FPC) certification per EN 10219. We provide CE marking with Declaration of Performance (DoP) for pipes sold into the European Economic Area (EEA). This ensures smooth customs clearance and project acceptance.
Q: What is the maximum length for hot-dip galvanizing?
A: Our galvanizing partner has a bath length of 13.5m. Therefore, pipes up to 12.5m can be fully immersed and galvanized. For longer pipes, we can arrange sectional galvanizing or apply alternative coating (zinc-rich epoxy). Please contact us for specific length requirements.
Q: Can you grind the weld flush for exposed architectural steel?
A: Yes. For visible structural pipes (e.g., columns in airport terminals, bridge arches), we can grind the SAW weld cap to be flush with the pipe body. This is an additional operation and adds cost and lead time (approx. +15%). We recommend specifying this requirement at time of order.
Q: What coating is recommended for outdoor structural steel?
A: For outdoor exposure, primer coating (zinc-rich epoxy, 60-80 microns) is standard for temporary protection during construction. For permanent protection without painting, hot-dip galvanizing (85-100 microns) is best for aggressive environments. For interior applications, oiled surface or minimal primer is sufficient.
Q: What is the typical lead time for S355JRH LSAW structural pipe?
A: Standard lead time: 30-45 days for JCOE/UOE sizes. For rolled plate heavy wall (> 50mm): 45-60 days. For welded and ground finish: add 2 weeks. For hot-dip galvanizing: add 1-2 weeks depending on bath schedule.
Project Reference – Al Wakrah Stadium Roof Structure (Qatar)
Country: Qatar (Al Wakrah, south of Doha)
Standard & Grade: EN 10219 S355JRH (with additional Charpy impact at 0°C and weld grinding for exposed steel)
Dimensions & Quantity:
● OD 508mm (20″) × WT 16.0mm – 4,500 meters (approx. 830 tons) manufactured by UOE process
● OD 610mm (24″) × WT 20.0mm – 3,200 meters (approx. 930 tons) manufactured by UOE process
● OD 813mm (32″) × WT 25.0mm – 1,800 meters (approx. 880 tons) manufactured by JCOE process
● OD 1,016mm (40″) × WT 30.0mm – 1,200 meters (approx. 840 tons) manufactured by rolled plate single seam
Total: 10,700 meters (10.7 km) of structural pipe, approx. 3,480 tons
Specifications: Plain ends with chamfer (for butt welding), weld caps ground flush to pipe body (exposed architectural requirement), primer coating (zinc-rich epoxy, 60 microns). Mandatory flattening test, guided bend test, 100% UT of weld seam plus 10% RT. Charpy impact at 0°C (min 27J, achieved 80-120J). CE marking with Declaration of Performance. Third-party inspection by TÜV Rheinland. All pipes required straightness ≤ 0.15% (stricter than standard 0.2%).
Application: Al Wakrah Stadium (also known as Al Janoub Stadium), one of the FIFA World Cup 2022 venues. The roof structure consists of a tensioned cable net with steel compression ring and radial trusses. The LSAW pipes were used for the main compression ring (1,016mm OD) and the radial truss chords (813mm, 610mm, 508mm). The roof spans approximately 200m in diameter and covers 42,000 seats.
Technical Challenges & Solutions:
● Architectural exposed steel – weld grinding requirement – The stadium roof structure is visible from inside and outside. The client required weld caps to be ground flush to the pipe body for smooth appearance. Womic performed weld grinding using automated orbital grinding machines followed by hand finishing. Each weld was inspected for smoothness (surface roughness Ra ≤ 6.3μm). This added 2 weeks to production but achieved the required aesthetic finish.
● High straightness requirement – The compression ring required pipes with straightness ≤ 0.15% (standard EN 10219 allows 0.2%). Womic used UOE and JCOE processes with mechanical expansion to achieve straightness of 0.08-0.12%. Each pipe was measured on a straightness table (laser alignment). Out-of-tolerance pipes were straightened using a hydraulic press.
● Primer coating for desert environment – Qatar has high temperature (up to 50°C), high humidity (up to 85% during winter), and airborne sand. Zinc-rich epoxy primer (60 microns) was applied to all pipes. Coating passed salt spray test (1,000 hours, ASTM B117) with less than 2mm creep. Holiday detection at 2kV. Adhesion measured at 8 MPa (min 5 MPa).
● Complex logistics during FIFA construction window – Stadium construction had a tight schedule (2020-2021). Womic delivered pipes in 4 shipments (each 800-1,000 tons) over 8 months. Pipes were shipped from Shanghai to Hamad Port (Doha), then trucked 45km to the stadium site. Due to COVID-19 restrictions, Womic's own inspectors could not travel. We arranged remote witnessed inspection via live video feed (TÜV online). All 3,480 tons were accepted remotely.
● Impact toughness for possible low ambient temperature – Although Qatar is hot, nights during winter can drop to 10°C, and the roof structure is exposed. EN 10219 S355JRH requires Charpy impact at 0°C (27J min). Womic achieved 80-120J, well above requirement. Test reports were included in the CE DoP package.
● Result: Al Wakrah Stadium opened in 2022 and hosted six World Cup matches. The steel roof structure has been widely praised for its elegant design. The contractor (a leading European steel fabricator) reported zero weld defects during erection. All LSAW pipes fit perfectly on site with no rework. Womic Steel received a letter of appreciation from the main contractor for "excellent dimensional accuracy and weld finish." The stadium continues to operate as a multi-use sports and event venue.
Contact:
Website: www.womicsteel.com
E-mail: sales@womicsteel.com
Tel / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568
Womic Steel – Your reliable partner for EN 10219 S355JRH LSAW steel pipes for building frames, bridge arches, stadium roofs, and heavy structural applications worldwide.
Related Products
-
EN 10219 S355JRH LSAW Steel Pipe: Manufacturing...
-
DNV-OS-F101 L450 SAWL Subsea Pipeline Steel Pip...
-
ASTM A500 Grade C LSAW Steel Pipe: Manufacturin...
-
ASTM A252 Grade 3 LSAW Steel Pipe: Manufacturin...
-
ASTM A252 Grade 2 LSAW Steel Pipe: Manufacturin...
-
ASTM A53 Grade B LSAW Steel Pipe: Manufacturing...
-
API 5L X70 LSAW Steel Pipe: Manufacturing Capab...
-
API 5L X65 PSL2 Sour Service LSAW Steel Pipe: M...
-
API 5L X65 LSAW Steel Pipe: Manufacturing Capab...