EN10219 S275JR S355JOH S355J2H LSAW Steel Pipe
EN10219 LSAW Steel Pipeis 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). ProducedLongitudinal 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 gradesS275JR, 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 andEN10204 3.1/3.2certification. 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:Ø 914mm × 16mmwall 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 LSAWpipes (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 tonsof LSAW pipes. Standard delivery time:30-45 daysafter order confirmation (faster for urgent orders, subject to stock/production schedule).
