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1. Womic Steel: Manufacturing Capabilities & Company Strength
Womic Steel Group is a premier manufacturer and global exporter with over 20 years of expertise in producing carbon, alloy, and stainless steel tubular products. Our state-of-the-art SSAW pipe production facility spans a comprehensive manufacturing capability exceeding 15,000 tons per month for spiral submerged arc welded structural pipes, serving European and international construction, infrastructure, and industrial projects.
Production Size Range for SSAW Structural Pipe: Outside diameter from 219mm to 3,000mm (8 inch to 120 inch) for SSAW process. Wall thickness from 5.0mm to 25.4mm. Single lengths from 6m to 18m standard, with custom lengths up to 60m available for deep foundation and structural projects.
Quality Certifications & Regulatory Compliance:
ISO 9001:2015 Certified: Quality Management System for structural pipe production and quality control processes, ensuring consistent product quality and continuous improvement across all manufacturing operations.
CE Marking (PED 2014/68/EU): Our structural pipes comply with the European Pressure Equipment Directive (PED) 2014/68/EU. CE marking is available upon request to facilitate smooth customs clearance and project acceptance within the European Economic Area (EEA). Declaration of Performance (DoP) provided for EN standard products.
EN 10204 3.2 Certification: In addition to standard 2.2 and 3.1 Mill Test Certificates, we supply products with Inspection Certificate 3.2, validated by EU-authorized third-party bodies (TÜV, LR, BV, SGS).
Third-Party Inspection (TPI) Approvals: Our products and production processes are approved and audited by major international agencies including SGS, BV, TÜV, and DNV.
Additional Certifications Available: ISO 14001:2015, ISO 45001:2018
Global Recognition: Womic Steel is a trusted supplier to global EPC contractors, construction companies, and infrastructure developers, serving over 80 countries across Europe, the Middle East, Africa, and Asia.
2. EN 10025 S355JR: Material Composition & Performance Characteristics
EN 10025 S355JR is the European standard for hot-rolled products of non-alloy structural steels. The "S" denotes structural steel, "355" indicates minimum yield strength of 355 MPa (51,500 psi), "JR" indicates impact testing at 20°C (27 Joules minimum). S355JR is the most widely used structural steel grade in Europe, offering an excellent balance of strength, weldability, and formability.
EN 10025 S355JR is specifically formulated for structural applications, offering excellent weldability for field joining, good ductility for bending and forming, and sufficient strength for load-bearing structures. Compared to lower grades like S235JR, S355JR provides approximately 51% higher yield strength, allowing for lighter structures, reduced section sizes, and lower overall project costs.
Chemical Composition (Ladle Analysis, % by mass):
| Element | EN 10025 S355JR (Max %) |
| C | 0.24 |
| Si | 0.55 |
| Mn | 1.60 |
| P | 0.035 |
| S | 0.035 |
| N | 0.014 |
| Cu | 0.55 |
| CE (max) | 0.45 |
Note: EN 10025 S355JR has stringent limits on carbon, phosphorus, and sulfur, resulting in excellent weldability. The carbon equivalent (CEV) limit of 0.45% ensures good field weldability for structural applications.
Mechanical Properties (Room Temperature):
| Property | EN 10025 S355JR |
| Yield Strength (min) | 355 MPa (51,500 psi) |
| Tensile Strength (min) | 470 MPa (68,200 psi) |
| Elongation (min) | 20% (Longitudinal) |
| Impact Toughness | 27 Joules @ 20°C (JR) |
| Impact Toughness (J2) | 27 Joules @ -20°C (optional) |
Note: EN 10025 S355JR offers approximately 51% higher yield strength than S235JR (235 MPa), allowing for significant weight reduction in structural applications.
Comparison of EN 10025 Structural Steel Grades:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Impact Temperature | Typical Application |
| S235JR | 235 | 360 | 20°C | Light structural applications |
| S275JR | 275 | 410 | 20°C | Medium structural applications |
| S355JR | 355 | 470 | 20°C | Heavy structural, bridges, buildings |
| S355J2 | 355 | 470 | -20°C | Low-temperature structural applications |
*Note: For the most demanding structural applications requiring low-temperature toughness, EN 10025 S355J2 should be considered.*
3. Dimensional Range & Standards Compliance
Womic Steel supplies EN 10025 S355JR SSAW structural pipes across a wide dimensional spectrum, fully compliant with EN 10025 and related international standards.
| Item | Specification |
| Standard | EN 10025 (S235JR, S275JR, S355JR, S355J2) |
| Manufacturing Process | SSAW (Spiral Submerged Arc Welded) - 219mm-3,000mm OD |
| Outside Diameter Range | 219mm – 3,000mm (8" – 120") |
| Wall Thickness Range | 5.0mm – 25.4mm |
| Length Range | Standard: 6m, 12m, 18m / Custom: up to 60m |
| End Finish | Plain End (PE) / Beveled End (BE) |
| Surface Finish | Bare / Oiled / Black Coated / Primed / Galvanized |
| Tolerances | OD: ±1.0% / WT: ±10% / Length: +50mm -0mm |
4. Available Dimensions & Specifications - EN 10025 S355JR SSAW Structural Pipe
SSAW Structural Pipe (219mm – 3,000mm OD)
| OD (mm) | Wall Thickness (mm) Options | Weight (kg/m) | Standard Length |
| 219 – 325 | 5.0, 6.0, 8.0, 10.0, 12.5 | 26.4 – 96.3 | 6m / 12m |
| 325 – 426 | 5.0, 6.0, 8.0, 10.0, 12.5, 14.0 | 39.5 – 142.2 | 6m / 12m |
| 426 – 530 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0 | 62.1 – 202.8 | 6m / 12m / 18m |
| 530 – 630 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0, 18.0 | 77.5 – 271.6 | 6m / 12m / 18m |
| 630 – 820 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0 | 92.3 – 394.6 | 6m / 12m / 18m |
| 820 – 1,020 | 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0 | 160.2 – 541.5 | 6m / 12m / 18m |
| 1,020 – 1,220 | 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 199.8 – 736.5 | 6m / 12m / 18m / 24m |
| 1,220 – 1,420 | 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 298.4 – 859.8 | 6m / 12m / 18m / 24m |
| 1,420 – 1,620 | 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 347.7 – 983.2 | 6m / 12m / 18m / 24m |
| 1,620 – 2,000 | 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 476.1 – 1,217.4 | 6m / 12m / 18m |
| 2,000 – 2,500 | 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 588.5 – 1,527.2 | 6m / 12m / 18m |
| 2,500 – 3,000 | 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 736.5 – 1,841.7 | 6m / 12m / 18m |
Note: Custom dimensions outside these ranges available upon request.
5. Common European and International Structural Steel Standards Manufactured by Womic Steel
| Standard | Steel Grades | Typical Application |
| EN Structural Standards | ||
| EN 10025 | S235JR, S275JR, S355JR, S355J2, S420ML, S460ML | Hot-rolled structural steel |
| EN 10219 | S235JRH, S275JRH, S355JRH, S355J2H | Cold-formed welded structural hollow sections |
| EN 10248 | S235GP, S275GP, S355GP | Hot-rolled steel sheet piling and pipe piling |
| EN 10225 | S355G8+M, S355G10+M, S420G1+QT, S460G1+QT | Offshore and marine structure steel |
| ASTM Structural Standards | ||
| ASTM A572 | GR.42, GR.50, GR.60, GR.65 | High-strength low-alloy structural steel |
| ASTM A500 | GR.A, GR.B, GR.C | Cold-formed welded structural tubing |
| ASTM A252 | GR.1, GR.2, GR.3 | Steel pipe piles for deep foundation |
| Other Standards | ||
| AS 1163 | C250, C350, C450 | Australian standard structural hollow sections |
| CSA G40.21 | 44W, 50W, 50A | Canadian standard structural steel |
Usage: Building construction, bridge supports, piling, marine foundations, offshore platforms, industrial facilities, stadiums, exhibition halls, airport terminals, tower structures, mechanical supports
6. Manufacturing Process - SSAW (Spiral Submerged Arc Welded) Structural Pipe
SSAW Manufacturing Process for Structural Pipe (219mm – 3,000mm OD):
Raw Material Inspection (Coil): Incoming hot-rolled steel coils are verified for chemical composition, mechanical properties, and surface quality against EN 10025 S355JR specifications. Each coil is assigned a unique heat number to ensure full material traceability throughout production.
Uncoiling & Leveling: Steel coils are loaded onto the uncoiler and fed through a precision leveling machine to flatten the strip, removing coil set and ensuring uniform flatness for consistent spiral forming.
Edge Milling & Trimming: Both longitudinal edges of the steel strip are milled and trimmed to precise width tolerance (±0.5mm). The edge preparation creates a clean, parallel surface essential for high-quality spiral weld formation.
Spiral Forming: The leveled strip is fed into a spiral forming machine at a controlled helix angle. The strip is continuously formed into a spiral cylindrical shape, with the edges aligned for welding.
Inner Submerged Arc Welding (SAW): The inner spiral seam is welded first using automatic submerged arc welding equipment with appropriate flux and wire combination.
Outer Submerged Arc Welding (SAW): The outer spiral seam is welded immediately after the inner weld, using automatic submerged arc welding equipment.
Cutting to Length: The continuous spiral welded pipe is cut to specified lengths using automatic plasma or oxygen cutting systems.
Non-Destructive Testing (NDT):
100% Ultrasonic Testing (UT): Automatic UT system inspects the entire spiral weld seam and full pipe body for laminations, inclusions, lack of fusion, and other discontinuities.
Radiographic Testing (RT): X-ray or gamma-ray inspection of weld seam (spot or full length as specified).
Magnetic Particle Inspection (MPI): Inspection of weld toes and heat-affected zone for surface cracks and discontinuities.
Hydrostatic Testing (Optional): Available upon customer request.
End Finishing: Plain ends (square cut) or beveled ends (30°-35° bevel angle) as per customer specification.
Final Inspection & Marking: Visual inspection for surface defects, dimensional verification (OD, WT, length, straightness, roundness), and permanent marking per EN 10025 (including grade, size, heat number, manufacturer identification). CE marking available upon request.
Advantages of SSAW Process for Structural Pipe:
1. Ability to produce very large diameters (up to 3,000mm+) from standard width coils
2. Continuous production process for high efficiency
3. Cost-effective for large diameter structural applications
4. Good dimensional stability and roundness
7. Quality Control & Testing Procedures for EN 10025 S355JR SSAW Structural Pipe
| Stage | Inspection Method | Purpose |
| Raw Material (Coil) | Chemical Analysis (OES Spectrometer) | Verify compliance with EN 10025 S355JR composition limits |
| Raw Material (Coil) | Tensile Testing | Verify yield strength (min 355 MPa), tensile strength (min 470 MPa), elongation (min 20%) |
| Raw Material (Coil) | Ultrasonic Testing | Detect internal laminations and defects |
| In-Process | Dimensional Inspection (Micrometers) | Monitor OD, WT during spiral forming |
| In-Process | Edge Preparation Inspection | Verify edge condition and alignment |
| Weld Zone | Ultrasonic Testing (UT) - On-Line | Detect weld discontinuities, lack of fusion |
| Weld Zone | Radiographic Testing (RT) | Verify weld penetration, porosity, slag inclusion |
| Weld Zone | Magnetic Particle Inspection (MPI) | Surface crack detection (weld and HAZ) |
| Finished Pipe | Dimensional Inspection | Verify OD, WT, length, straightness, roundness |
| Finished Pipe | Hydrostatic Testing (Optional) | Verify pressure integrity |
| Finished Pipe | Guided Bend Test | Verify weld ductility and soundness |
| Finished Pipe | Flattening Test | Verify ductility and soundness of pipe body |
| Finished Pipe | Charpy V-Notch Impact Test | Verify impact toughness (27J @ 20°C for JR) |
| Finished Pipe | Visual & Surface Inspection | Check for surface defects, laminations, cracks |
| Finished Pipe | Marking Verification | Ensure permanent marking per EN 10025 |
Quality Documentation:
1. Mill Test Certificate per EN 10204 Type 2.2, 3.1, or 3.2
2. Ultrasonic Test Report (weld and body)
3. Radiographic Test Report (if specified)
4. Dimensional Inspection Report
5. Traceability from heat number to finished pipe
6. Declaration of Performance (DoP) for CE marking
8. Primary Applications - EN 10025 S355JR SSAW Structural Pipe
EN 10025 S355JR SSAW structural pipes are essential components in building construction, infrastructure, and industrial projects:
Building Construction: Columns, beams, bracing members, and trusses for high-rise buildings, commercial buildings, warehouses, and industrial facilities.
Bridge Supports: Bridge piers, abutments, and structural supports for highway and railway bridges.
Piling & Deep Foundation: Load-bearing piles for building foundations, bridge foundations, and industrial facilities requiring deep foundation support.
Marine & Offshore Structures: Foundation piles for port structures, wharves, docks, and offshore platforms.
Stadiums & Exhibition Halls: Large-span structural members for stadium roofs, exhibition halls, and convention centers.
Airport Terminals: Structural supports for airport terminal buildings and hangars.
Tower Structures: Support structures for communication towers, transmission towers, and wind turbines.
Industrial Facilities: Structural supports for factories, power plants, refineries, and processing facilities.
Mechanical & Equipment Supports: Structural supports for heavy machinery, equipment platforms, and industrial racks.
9. Packaging & Shipping - EN 10025 S355JR SSAW Structural Pipe
EN 10025 S355JR SSAW structural pipes are packaged and shipped with utmost care to ensure their protection during transit.
Packaging:
Protective Coating: Before packaging, pipes may be coated with anti-rust oil, primer, or left bare as required.
Bundling (Small Diameters): For smaller diameter pipes (typically below 610mm / 24"), pipes are bundled together in hexagonal or rectangular bundles secured with steel straps (typically 3-5 straps per bundle with protective corner guards).
Individual Stacking (Large Diameters): For larger diameter pipes (above 610mm / 24"), pipes are handled and shipped individually with wooden dunnage or rubber padding between layers.
End Caps: Plastic or steel end caps protect beveled ends and plain ends from impact damage, debris ingress, and moisture.
Shipping:
Mode of Transportation: Pipes are shipped via container vessels, bulk carriers, or rail freight.
Containerization (Small Diameters): For smaller diameter pipes (typically below 508mm / 20"), pipes are loaded into standard 20ft or 40ft shipping containers.
Bulk Vessel Loading (Large Diameters & Large Volumes): For large-volume orders (typically >500 tons) or large diameter pipes (above 508mm / 20"), pipes are loaded directly into bulk carriers.
Flat Rack or Open Top Containers: For pipes exceeding standard container dimensions (length >12m or diameter >2.3m), flat rack containers or open top containers may be used.
Labeling and Documentation: Each bundle or individual pipe is clearly labeled with essential information including material grade, standard, dimensions, heat number, bundle/pipe number, and handling instructions.
Customs Compliance: All necessary customs documentation—commercial invoice, packing list, bill of lading, Certificate of Origin, Mill Test Certificates, and CE Declaration of Performance—is prepared.
Secure Fastening: Bundles and individual pipes are securely fastened using steel strapping (with corner protectors), dunnage bags, timber bracing, or chain lashing.
Tracking and Monitoring: Advanced logistics tracking systems provide real-time location updates.
In summary, Womic Steel ensures that all EN 10025 S355JR SSAW structural pipes are packaged with industry-leading protective measures and shipped using reliable transportation methods.
10. Womic Steel Advantages & FAQ - EN 10025 S355JR SSAW Structural Pipe
Why Partner with Womic Steel for EN 10025 S355JR SSAW Structural Pipe?
Complete Range of Sizes: SSAW process covering 219mm to 3,000mm OD, wall thickness up to 25.4mm, lengths up to 60m for structural and piling projects.
CE Marking Available: Full compliance with European standards. CE marking and Declaration of Performance (DoP) provided for EN standard products.
European Standard Focus: Specialized experience in EN 10025 S355JR structural applications for European and international projects.
Value-Added Services: End beveling, plain end cutting, protective coating (primer, galvanizing, FBE, 3LPE), and anti-corrosion wrapping.
Long Length Capability: Up to 60m single length for deep foundation and structural projects, reducing field splicing requirements.
Competitive Logistics: Strategic partnership with global freight forwarders ensures cost-effective worldwide shipping.
Comprehensive Documentation: Full Mill Test Certificates (EN 10204 Type 2.2, 3.1, or 3.2), NDT reports, dimensional reports, traceability documentation, and CE DoP.
Choose Womic Steel Group as your reliable partner for high-quality EN 10025 S355JR SSAW structural pipes for construction, infrastructure, and industrial projects worldwide. Welcome to inquire!
Website: www.womicsteel.com
Email: sales@womicsteel.com
Tel/WhatsApp/WeChat:
Victor: +86-15575100681
Jack: +86-18390957568
Frequently Asked Questions (FAQ) - EN 10025 S355JR SSAW Structural Pipe
Q: What is the difference between EN 10025 S355JR and EN 10219 S355JRH?
A: EN 10025 is the standard for hot-rolled structural steel products (plates, sections, bars). EN 10219 is the standard for cold-formed welded structural hollow sections. Both have similar mechanical properties, but EN 10219 includes additional requirements specific to hollow sections (dimensional tolerances, flattening tests). For SSAW pipe applications, both standards are applicable.
Q: What is the difference between S355JR and S355J2?
A: S355JR has guaranteed impact toughness of 27 Joules at 20°C, while S355J2 has guaranteed impact toughness of 27 Joules at -20°C. S355J2 is recommended for low-temperature applications, colder climates, and offshore structures.
Q: What is the maximum single length for EN 10025 S355JR SSAW structural pipe?
A: Standard lengths are 6m, 12m, and 18m. Custom lengths up to 60m are available depending on diameter and wall thickness.
Q: What surface finish options are available?
A: We offer bare (mill scale), oiled, primed, black coated, hot dip galvanized, and various anti-corrosion coatings (FBE, 3LPE).
Q: Can you supply structural pipe with third-party inspection?
A: Yes. We facilitate inspections by SGS, BV, TÜV, DNV, or any client-nominated representative. 3.2 inspection certificates are routinely supplied upon request.
Q: What documentation is provided with each shipment?
A: Mill Test Certificate (EN 10204 Type 3.1), Dimensional Inspection Report, UT Reports, RT Reports (if specified), Traceability Documentation, Packing List, Commercial Invoice, Certificate of Origin, and CE Declaration of Performance (DoP).
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