EN10219 LSAW Steel Pipe is a cold-formed, welded structural hollow section manufactured to the European standard EN 10219 (Non-alloy and fine grain steels, cold-formed welded hollow sections). Produced via Longitudinal Submerged Arc Welding (LSAW)-a double-sided, fully automated welding process-it delivers exceptional structural integrity, high pressure resistance, and consistent dimensional accuracy. Available in grades S275JR, S355J0H, S355J2H, these pipes are engineered for heavy-duty structural, infrastructure, and energy applications.
Key Specifications
Standard
EN 10219-1/-2: Cold-formed welded structural hollow sections
Manufacturing Process: LSAW (UOE/JCOE forming, double-sided submerged arc welding)
| Parameter | Range |
| Standard | EN10219-1 & EN10219-2 (BS EN10219) |
| Steel Grades | S235JRH / S275JR / S275J0H / S275J2H / S355JOH / S355J2H / S355K2H / S460NH / S460NLH |
| Outer Diameter (OD) | 323.8mm – 1,524mm (customizable up to 2,500mm) |
| Wall Thickness (WT) | 6mm – 50mm (up to 80mm available for specific grades) |
| Length | 6m – 20m (custom lengths available upon request) |
| End Types | Plain Ends / Beveled Ends / Threaded Ends |
| Manufacturing Process | LSAW (Longitudinal Submerged Arc Welded) / JCOE forming |
| Section Shapes | Circular / Square / Rectangular |
Chemical Composition (EN10219, t≤40mm)
| Steel Grade | C Max (%) | Mn Max (%) | P Max (%) | S Max (%) | Si (%) |
| S275JR | 0.2 | 1.5 | 0.035 | 0.035 | - |
| S275J0H | 0.2 | 1.5 | 0.035 | 0.035 | - |
| S275J2H | 0.2 | 1.5 | 0.03 | 0.03 | - |
| S355JOH | 0.22 | 1.6 | 0.035 | 0.035 | ≤0.55 |
| S355J2H | 0.22 | 1.6 | 0.03 | 0.03 | ≤0.55 |
Steel Grade Mechanical Properties
| Steel Grade | Min. Yield Strength (MPa) | Tensile Strength (MPa) | Min. Elongation | Impact Test Temp. |
| S275JR | ≥275 (t≤16mm) | 410–560 | ≥20% | Room Temperature |
| S275J0H | ≥275 (t≤16mm) | 410–560 | ≥20% | 0°C (≥27J) |
| S275J2H | ≥275 (t≤16mm) | 410–560 | ≥20% | -20°C (≥27J) |
| S355JOH | ≥355 (t≤16mm) | 470–630 | ≥20% | 0°C (≥27J) |
| S355J2H | ≥355 (t≤16mm) | 470–630 | ≥20% | -20°C (≥27J) |
Advantages of LSAW Technology :
Large Diameter Capacity – Suitable for applications requiring OD up to 2,500mm
Heavy Wall Thickness – Capable of achieving WT up to 80mm for demanding structural loads
Superior Weld Quality – Double submerged arc welding ensures uniform and defect-free seams
High Pressure Resistance – Ideal for high-pressure pipeline systems and offshore energy infrastructure
Low Temperature Toughness – Grades S275J2H and S355J2H are specifically designed for low-temperature service conditions
Anti-Corrosion Performance – Excellent resistance to corrosion, extendable with various coating options
Full Traceability – Each pipe is marked with heat number, grade, dimensions, and manufacturer identification
Available Coatings & Surface Finishes:
| Coating Type | Description |
| Bare / Black | Standard oil coating for short-term rust protection |
| Varnish Coating | Transparent protective lacquer |
| FBE (Fusion Bond Epoxy) | Single-layer epoxy for corrosion resistance |
| 3PE / 3PP Coating | Three-layer polyethylene/polypropylene for high-performance anti-corrosion |
| Bitumen Coating | Asphalt-based coating for underground/underwater use |
| Galvanized | Hot-dip galvanized surface (upon request) |
Applications
| Industry Sector | Typical Applications | Recommended Grade |
| Construction & Civil Engineering | Building structures, stadiums, high-rise frameworks, industrial plants | S275JOH, S355JOH |
| Infrastructure | Bridges, flyovers, noise barriers, highway guardrails | S355J2H, S275J2H |
| Piling & Foundation | Marine piling, jetty construction, port facilities, foundation piles | S355J2H+N, S275J0H |
| Oil & Gas | Long-distance pipelines, gas transmission lines, flow lines | S355JOH, S355J2H |
| Directional Boring (HDD) | Underground utility installation, trenchless pipe laying | S355J0H (heavy WT) |
| Marine & Offshore | Offshore platforms, coastal protection structures, sea walls | S355J2H+N |
| Water Transmission | Water supply pipelines, sewage systems, irrigation projects | S275JR |
Quality Control & Testing
EN10219 LSAW steel pipes are manufactured under strict quality management systems compliant with ISO 9001 and EN10204 3.1/3.2 certification. Third-party inspections are welcomed (SGS, BV, DNV, Moody).
Standard Tests:
-Chemical Composition Analysis
-Mechanical Properties Testing (Yield Strength, Tensile Strength, Elongation)
-Flattening Test
-Bending Test
-Impact Test (Charpy V-notch at specified temperatures)
-Hydrostatic Test
-X-Ray Inspection (Seam integrity)
-Ultrasonic Testing (UT) for welds
-Dimensional Inspection
Actual Engineering Cases
Case 1: Directional Boring Project – New Zealand
Project: Underground pipeline installation using horizontal directional drilling
Product: EN10219 S355J0H LSAW steel pipe
Specifications: Ø914mm × 16mm wall thickness
Quantity: 470 tons
The heavy-wall large-diameter pipes were successfully delivered for a directional boring application, demonstrating the product's capability to meet demanding trenchless installation requirements
Case 2: Steel Structural Fabrication – Italy
Project: Industrial steel structural fabrication
Product: EN10219 S235JR LSAW steel pipe
Specifications: 1219.1×10mm / 1016×12mm custom lengths
Cooperation initiated at the Shanghai exhibition in September 2023, with deliveries completed by May of the following year for steel structural fabrication applications
Case 3: European Hydrogen Pipeline Project (2025)
Product: EN10219 S355J0H LSAW pipes (OD 813 mm, WT 14.3 mm, 3PE coated).
Scope: Cross-border hydrogen transmission pipeline (first Chinese LSAW pipe order for European hydrogen infrastructure).
Outcome: Met strict EU pressure equipment standards, certified by UDT (Poland), successfully delivered for project construction.
FAQ
Q1: What is the difference between EN10210 and EN10219?
A: EN10210 covers hot-finished structural hollow sections, while EN10219 covers cold-formed sections. Cold-formed EN10219 pipes offer tighter dimensional tolerances and are generally more cost-effective, whereas EN10210 (hot-finished) provides better formability for certain applications.
Q2: What equivalents exist in other standards?
Common equivalents include:
EN10219 S275JR ≈ ASTM A36, Q235B
EN10219 S355J2H ≈ ASTM A500 Grade C, Q355D
EN10219 S355JOH ≈ ASTM A500 Grade B
Q3: Can EN10219 pipes be used for pressure applications?
A: EN10219 pipes are primarily intended for structural applications. For pressure purposes, EN10217 or API 5L specifications are typically more suitable.
Q4: Is third-party inspection available?
A: Yes. Third-party inspection services from SGS, BV, DNV, Moody, or any specified agency are fully supported. Mill test certificates (EN10204 3.1/3.2) are provided with each shipment.
Q5: What is the maximum wall thickness available?
A: Standard production supports wall thickness up to 50mm. For heavy-wall requirements up to 80mm (e.g., directional boring projects), special production arrangements can be made.
Q6:What is your production capacity and delivery time?
A: Annual production capacity: 300,000 tons of LSAW pipes. Standard delivery time: 30–45 days after order confirmation (faster for urgent orders, subject to stock/production schedule).
Our address
Rm1406,14th/F No 208, Hongqi Road, Nankai Dist, Tianjin City ,China
Phone Number( WhatsApp/Wechat)
+86 16622033809
alisa@tjshenzhoutong.com
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