EN10219 S355J2H spiral welded steel pipe (also known as SSAW/SAWH pipe) is a cold-formed helical submerged arc welded structural hollow section manufactured in accordance with European standard EN 10219 (Part 1: technical delivery conditions; Part 2: dimensional tolerances). This low-alloy high-strength spiral steel pipe features excellent low-temperature impact resistance, superior structural bearing capacity and outstanding weldability. It is specially designed for heavy-duty engineering, cold-region infrastructure, foundation piling and large-scale structural projects that require strict mechanical performance and dimensional accuracy.
Different from ordinary carbon steel spiral pipes, S355J2H grade pipes are certified for -20℃ low-temperature Charpy V-notch impact test, eliminating brittle fracture risks in harsh cold environments, which makes it the preferred structural steel pipe for European standard engineering projects.
》Clear definition of S355J2H code for quick engineering reference:
- S: Structural steel for construction and engineering structural components
- 355: Minimum yield strength reaches 355MPa, medium-high strength structural steel grade
- J2: Guaranteed minimum 27J Charpy impact energy at -20℃, excellent low-temperature toughness
- H: Hollow section, dedicated for welded cold-formed hollow steel pipes
Complete Technical Parameters
1 Basic Standard Information
|
Item |
Specification |
|---|---|
|
Executive Standard |
EN 10219-1:2019, EN 10219-2:2019 |
|
Steel Grade |
S355J2H |
|
Manufacturing Process |
Spiral Submerged Arc Welding (SSAW/SAWH), cold forming |
|
Outer Diameter Range |
219mm - 3048mm |
|
Wall Thickness Range |
6mm - 40mm |
|
Standard Length |
6m / 12m / 18m / customized fixed length (max 32m) |
|
Pipe End Type |
Plain end / Beveled end for welding / Threaded end |
|
Surface Treatment |
Black varnish / 3PE anti-corrosion / FBE coating / Hot dip galvanized |
2 Mechanical Properties
|
Yield Strength (Rp0.2) |
Tensile Strength (Rm) |
Elongation (A) |
Charpy Impact Test |
|---|---|---|---|
|
≥355 MPa |
470 - 630 MPa |
≥22% |
27J @ -20℃ (V-notch, longitudinal) |
3 Dimensional Tolerance (Compliant with EN10219-2)
|
Parameter |
Tolerance Standard |
|---|---|
|
Outer Diameter |
±0.75% of nominal OD |
|
Wall Thickness |
±7.5% for thickness＞5mm; ±10% for thickness≤5mm |
|
Pipe Straightness |
≤0.15% of total pipe length |
|
Fixed Length Deviation |
+50mm / -0mm |
4 Chemical Composition (Max %, Heat Analysis)
|
C |
Si |
Mn |
P |
S |
|---|---|---|---|---|
|
0.22 |
0.55 |
1.60 |
0.025 |
0.020 |
Applications
Benefiting from high strength and low-temperature toughness, EN10219 S355J2H spiral steel pipes are widely adopted in global engineering projects, especially European standard infrastructure:
- Construction Structural Engineering: Main support columns for high-rise buildings, steel structure frames, truss structures, large exhibition venues and stadium supporting systems
- Bridge & Traffic Infrastructure: Bridge pile foundations, bridge supporting piers, highway guardrail structures, railway auxiliary steel structures
- Foundation Piling Works: Marine construction pile pipes, municipal engineering foundation piles, building foundation bearing piles, slope protection support pipes
- New Energy Industry: Wind turbine tower base structures, solar power station bracket main pipes, offshore wind farm auxiliary structural pipes
- Cold Region Municipal Projects: Outdoor pipeline supports, underground comprehensive pipe galleries, cold-area municipal supporting structures in Northern Europe, Russia and Canada
- Offshore & Port Engineering: Port wharf supporting structures, offshore platform auxiliary hollow structural components, seawater corrosion resistant structural pipes (with anti-corrosion coating)
Frequently Asked Questions (FAQ)
Q1: What is the difference between S355J2H and S355J0H spiral steel pipes?
A: The core difference lies in low-temperature impact resistance. S355J0H requires 27J impact energy at 0℃, while S355J2H is tested at -20℃. S355J2H is more suitable for cold climate environments and dynamic load-bearing structures with higher safety requirements, which is the mainstream grade for high-standard European engineering projects.
Q2: Is EN10219 S355J2H pipe hot finished or cold formed?
A: It is cold-formed welded hollow section complying with EN10219 standard. Compared with hot-finished EN10210 steel pipes, it has tighter dimensional tolerances, smoother surface and lower production cost, more suitable for large-diameter spiral structural pipes.
Q3: Can you provide official EN standard test certificates?
A: Yes. We can provide EN 10204 3.1 factory test certificate for regular orders, and EN 10204 3.2 third-party inspection certificate upon customer request. CE certification documents are also available for European market customs clearance.
Q4: What anti-corrosion coatings can be customized?
A: We support multiple surface treatments: black oil varnish for temporary protection, 3PE/FBE anti-corrosion coating for buried pipelines, hot-dip galvanizing for outdoor exposed structures. Customized coating thickness is acceptable.
Q5: What is your MOQ and delivery time?
A: MOQ is 1 ton. Conventional size inventory goods can be delivered within 7 working days; customized diameter, thickness and length orders take 15-25 working days. We support FOB, CIF, CFR and DDP international trade terms.
Q6: Is this pipe suitable for liquid transportation or only for structural use?
A: EN10219 S355J2H is specially designed for structural purposes, not recommended for long-distance oil/gas medium transportation. For fluid pipeline projects, please choose EN10218 or API 5L standard spiral pipes.
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