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 steel piling pipes, serving European and international marine, offshore, and deep foundation projects.
Production Size Range for SSAW Steel Piling Pipe: Outside diameter from 508mm to 3,000mm (20 inch to 120 inch) for SSAW process. Wall thickness from 6.0mm to 25.4mm. Single lengths from 6m to 18m standard, with custom lengths up to 60m available for deep foundation projects.
Quality Certifications & Regulatory Compliance:
ISO 9001:2015 Certified: Quality Management System for piling pipe production and quality control processes, ensuring consistent product quality and continuous improvement across all manufacturing operations.
CE Marking (PED 2014/68/EU): Our piling 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) for critical marine and foundation projects requiring full material traceability and independent verification.
FPC (Factory Production Control) per EN 10248 / EN 10219: Self-declaration of conformity for CE marking.
Third-Party Inspection (TPI) Approvals: Our products and production processes are approved and audited by major international agencies and Classification Societies including SGS, BV, ABS, LR, DNV, GL, and TÜV.
Additional Certifications Available: ISO 14001:2015, ISO 45001:2018, NORSOK M-650
Global Recognition: Womic Steel is a trusted supplier to global EPC contractors, port authorities, marine engineering firms, and foundation contractors, serving over 80 countries across Southeast Asia, Europe, the Middle East, Africa, and the Americas.
2. EN 10248 S355GP: Material Composition & Performance Characteristics
EN 10248 S355GP is the European standard for hot-rolled steel sheet piling and pipe piling. The "S" denotes structural steel, "355" indicates minimum yield strength of 355 MPa, and "GP" stands for "General Piling" (general piling application). S355GP offers higher yield strength than ASTM A252 GR.3 (355 MPa vs 345 MPa) and is widely specified for European, Middle Eastern, and African marine construction projects.
EN 10248 S355GP is specifically formulated for piling applications, offering excellent weldability for field splicing, good low-temperature toughness for marine environments, and sufficient ductility to withstand driving stresses during pile installation. Compared to standard structural grades like S235JR, this piling grade provides significantly higher load-bearing capacity, allowing for deeper driving depths and reduced pile quantities.
Chemical Composition (Ladle Analysis, % by mass):
| Element | EN 10248 S355GP (Max %) |
| C | 0.22 |
| Si | 0.55 |
| Mn | 1.60 |
| P | 0.035 |
| S | 0.035 |
| Cu | 0.55 |
| CE (max) | 0.45 |
Note: EN 10248 S355GP has stringent limits on carbon, phosphorus, and sulfur, resulting in better weldability and toughness. The carbon equivalent (CEV) limit of 0.45% ensures excellent field weldability for pile splicing.
Mechanical Properties (Room Temperature):
| Property | EN 10248 S355GP |
| Yield Strength (min) | 355 MPa (51,500 psi) |
| Tensile Strength (min) | 470 MPa (68,200 psi) |
| Elongation (min) | 19% (Longitudinal) |
| Impact Toughness | 27 Joules @ 0°C (optional) |
*Note: EN 10248 S355GP offers higher minimum yield and tensile strength compared to ASTM A252 GR.3. For marine applications requiring low-temperature impact toughness, EN 10248 allows optional impact testing at 0°C (27 Joules minimum).*
Comparison of EN 10248 Piling Pipe Grades:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Typical Application |
| S235GP | 235 | 360 | Light piling, sheet piling |
| S275GP | 275 | 410 | Medium load, retaining walls |
| S355GP | 355 | 470 | Heavy marine, deep foundation |
Note: For the most demanding marine projects requiring high driving stresses and deep penetration, EN 10248 S355GP is the recommended grade.
3. Dimensional Range & Standards Compliance
Womic Steel supplies EN 10248 S355GP SSAW steel piling pipes across a wide dimensional spectrum, fully compliant with EN 10248 and related international standards. The SSAW (Spiral Submerged Arc Welded) process is ideal for large diameter piling applications.
| Item | Specification |
| Standard | EN 10248 (S235GP, S275GP, S355GP) |
| Manufacturing Process | SSAW (Spiral Submerged Arc Welded) - 508mm-3,000mm OD |
| Outside Diameter Range | 508mm – 3,000mm (20" – 120") |
| Wall Thickness Range | 6.0mm – 25.4mm |
| Length Range | Standard: 6m, 12m, 18m / Custom: up to 60m |
| End Finish | Plain End (PE) / Beveled End (BE) with sacrificial steel rings optional |
| Surface Finish | Bare / Oiled / Black Coated / 3PE / FBE / Coal Tar Epoxy |
| Tolerances | OD: ±1.0% / WT: ±10% (EN) / Length: +50mm -0mm |
4. Available Dimensions & Specifications - EN 10248 S355GP SSAW Steel Piling Pipe
SSAW Piling Pipe (508mm – 3,000mm OD)
| OD (mm) | Wall Thickness (mm) Options | Weight (kg/m) | Standard Length |
| 508 – 610 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 74.3 – 360.5 | 6m / 12m / 18m |
| 610 – 762 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 89.4 – 454.3 | 6m / 12m / 18m |
| 762 – 914 | 6.0, 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 111.9 – 548.2 | 6m / 12m / 18m / 24m |
| 914 – 1,067 | 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 178.7 – 642.4 | 6m / 12m / 18m / 24m |
| 1,067 – 1,220 | 8.0, 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 209.0 – 736.5 | 6m / 12m / 18m / 24m |
| 1,220 – 1,422 | 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 298.4 – 859.8 | 6m / 12m / 18m / 24m |
| 1,422 – 1,625 | 10.0, 12.5, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 348.2 – 986.5 | 6m / 12m / 18m / 24m |
| 1,625 – 2,000 | 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, 25.0 | 477.1 – 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. Larger diameters (up to 3,500mm / 138") available for specialized projects.
5. Common Piling Pipe, Marine & Foundation Standards Manufactured by Womic Steel
| Standard | Steel Grades | Typical Application |
| EN Piling Standards | ||
| EN 10248 | S235GP, S275GP, S355GP | Hot-rolled steel sheet piling and pipe piling |
| EN 10219 | S235JRH, S275JRH, S355JRH, S355J2H | Cold-formed welded structural hollow sections for piling |
| EN 10025 | S235JR, S275JR, S355JR, S355J2, S420ML, S460ML | Hot-rolled structural steel for piling and marine use |
| EN 10225 | S355G8+M, S355G10+M, S420G1+QT, S460G1+QT | Offshore and marine structure steel for piling |
| ASTM Piling Standards | ||
| ASTM A252 | GR.1, GR.2, GR.3 | Steel pipe piles for deep foundation, marine piling |
| ASTM A500 | GR.A, GR.B, GR.C | Structural round/square tubes for piling |
| ASTM A572 | GR.42, GR.50, GR.60, GR.65 | High-strength low-alloy structural piling |
| API Standards | ||
| API 5L | GR.B, X42, X52, X65, X70 | Line pipe used as piling |
| JIS Standards | ||
| JIS A5525 | SKK400, SKK490, SKK540 | Steel pipe piles for harbor and marine structures |
Usage: Deep foundation piling, marine piling, offshore platform foundation, wharf and dock construction, bridge foundation, coastal protection, breakwater, fender system, jacket pile, port and harbor construction, land reclamation, river training, tunnel engineering, offshore wind turbine foundations
6. Manufacturing Process - SSAW (Spiral Submerged Arc Welded) Steel Piling Pipe
SSAW Manufacturing Process for Piling Pipe (508mm – 3,000mm OD):
Raw Material Inspection (Coil): Incoming hot-rolled steel coils are verified for chemical composition, mechanical properties, and surface quality against EN 10248 or customer 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. The helix angle is adjustable to achieve different diameters from the same coil width.
Inner Submerged Arc Welding (SAW): The inner spiral seam is welded first using automatic submerged arc welding equipment with appropriate flux and wire combination. The welding head is positioned inside the pipe to ensure proper penetration.
Outer Submerged Arc Welding (SAW): The outer spiral seam is welded immediately after the inner weld, using automatic submerged arc welding equipment. The outer weld completes the full penetration weld and provides additional strength.
Cutting to Length: The continuous spiral welded pipe is cut to specified lengths using automatic plasma or oxygen cutting systems with precision length control (+50mm -0mm for piling specifications).
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) to verify weld quality and penetration.
Magnetic Particle Inspection (MPI): Inspection of weld toes and heat-affected zone for surface cracks and discontinuities.
Hydrostatic Testing (Optional): Available upon customer request for critical piling applications requiring pressure integrity verification.
End Finishing: Plain ends (square cut) or beveled ends (30°-35° bevel angle) as per customer specification. Sacrificial steel rings may be welded to pipe ends for additional protection during pile driving.
Final Inspection & Marking: Visual inspection for surface defects, dimensional verification (OD, WT, length, straightness, roundness), and permanent marking per EN 10248 (including grade, size, heat number, manufacturer identification). CE marking available upon request.
Advantages of SSAW Process for Piling 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 piling applications
4. Good dimensional stability and roundness for driving
7. Quality Control & Testing Procedures for SSAW Piling Pipe
| Stage | Inspection Method | Purpose |
| Raw Material (Coil) | Chemical Analysis (OES Spectrometer) | Verify compliance with EN 10248 composition limits |
| Raw Material (Coil) | Tensile Testing | Verify yield strength, tensile strength, elongation |
| 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 for critical applications |
| 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 (Optional) | Verify low-temperature toughness for marine use |
| Finished Pipe | Hardness Test (Optional) | Verify maximum hardness for weldability |
| Finished Pipe | Visual & Surface Inspection | Check for surface defects, laminations, cracks |
| Finished Pipe | Marking Verification | Ensure permanent marking per standard |
Optional Tests for Critical Marine & Offshore Applications:
1. CTOD (Crack Tip Opening Displacement) Test for fracture toughness
2. Low-temperature Impact Testing at -20°C, -40°C, or -60°C
3. Hardness Testing (HV10 or HRC)
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 10248 S355GP SSAW Steel Piling Pipe
EN 10248 S355GP SSAW steel piling pipes are essential components in deep foundation, marine construction, and heavy civil engineering projects, particularly in European and international markets:
Deep Foundation Piling: Load-bearing piles for high-rise buildings, bridges, industrial facilities, and heavy structures requiring deep foundation support. The high strength of S355GP allows for deeper driving depths and higher load capacity.
Marine & Offshore Platform Foundation: Foundation piles for offshore oil and gas platforms, drilling rigs, production platforms, and offshore wind turbine foundations. Marine piling must withstand wave action, current forces, and corrosive seawater environment.
Wharf, Dock & Port Construction: Piling for container terminals, bulk cargo ports, passenger terminals, Ro-Ro facilities, and general cargo wharves. Piles provide structural support for deck structures, mooring dolphins, and breasting dolphins.
Bridge Foundation & Pier: Deep foundation piles for bridge piers, abutments, and tower foundations for cable-stayed and suspension bridges. Piles transfer structural loads to competent bearing strata.
Coastal Protection & Seawall: Piling for seawall structures, coastal revetments, shoreline protection, and erosion control. Steel pipe piles provide robust structural support for armor units and concrete cap structures.
Breakwater & Jetty Construction: Piling for rubble mound breakwater foundations, vertical wall breakwaters, jetties, and groynes. Piles provide foundation stability for wave-dissipating structures.
Offshore Wind Turbine Foundations: Monopile and jacket foundation piles for offshore wind farms. S355GP offers excellent low-temperature toughness for North Sea and Baltic Sea conditions.
Land Reclamation & Reclamation Seawall: Piling for reclamation area containment structures, perimeter seawalls, and reclamation bunds.
River Training & Flood Control: Piling for riverbank protection, guide banks, spurs, and flood control structures.
Tunnel Engineering & Cut-and-Cover: Piling for cut-and-cover tunnel foundations, secant pile walls, and tunnel portal support structures.
9. Packaging & Shipping - EN 10248 S355GP SSAW Steel Piling Pipe
EN 10248 S355GP SSAW steel piling pipes are packaged and shipped with utmost care to ensure their protection during transit. Here is a description of the packaging and shipping process for large-diameter SSAW piling pipes:
Packaging:
Protective Coating: Before packaging, pipes may be coated with a thin layer of anti-rust oil or protective varnish to prevent surface corrosion and oxidation during storage and transit. Bare finish also available for immediate coating application at destination or for marine environments where corrosion allowance is specified.
Bundling (Small Diameters): For smaller diameter pipes (typically below 610mm / 24"), pipes are bundled together in hexagonal or rectangular bundles. They are secured using steel straps (typically 3-5 straps per bundle with protective corner guards) to prevent movement within the bundle.
Individual Stacking (Large Diameters): For larger diameter pipes (above 610mm / 24"), pipes are typically handled and shipped individually due to weight and dimensional constraints. Wooden dunnage or rubber padding placed between pipe layers prevents abrasion and coating damage.
End Caps: Plastic or steel end caps are placed on both ends of each pipe to protect beveled ends, plain ends from impact damage, debris ingress, and moisture.
Sacrificial Steel Rings (Optional): For piling pipes requiring enhanced end protection during pile driving, sacrificial steel rings (typically 50-100mm wide, 6-12mm thick) are welded to the driving end of each pipe. These rings absorb driving hammer impacts and protect the pipe end from deformation.
Padding and Cushioning: For premium export orders, padding materials such as foam rings, rubber strips, or wood dunnage are used between pipe layers to prevent abrasion, coating damage, and impact damage during handling and transit.
Lifting Points: Lifting lugs or designated lifting points may be added to heavy pipes (over 2,000 kg per pipe) to facilitate safe unloading at destination using crane or forklift.
Shipping:
Mode of Transportation: Pipes are shipped via container vessels (20ft or 40ft containers for small diameters), bulk carriers (break bulk for large diameters and large volumes), or rail freight, depending on destination, order volume, and delivery urgency. Project cargo vessels may be used for very large diameter or extra-long pipes.
Containerization (Small Diameters): For smaller diameter pipes (typically below 508mm / 20"), pipes are loaded into standard 20ft or 40ft shipping containers to ensure safe and organized transit.
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 or geared vessels. Lifting beams and spreader bars prevent damage during loading.
Flat Rack or Open Top Containers (Over-Height / Over-Length): For pipes exceeding standard container dimensions (length >12m or diameter >2.3m), flat rack containers or open top containers may be used for break bulk quantities.
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. CE marking labels applied where required.
Customs Compliance: For international shipments, all necessary customs documentation---including commercial invoice, packing list, bill of lading, Certificate of Origin, Mill Test Certificates, and CE Declaration of Performance---is prepared to ensure smooth clearance at destination port.
Secure Fastening: Within the transportation vehicle or container, bundles and individual pipes are securely fastened and braced using steel strapping (with corner protectors), dunnage bags, timber bracing, or chain lashing to prevent shifting, rolling, or movement that could cause damage during transit.
Tracking and Monitoring: Advanced logistics tracking systems are employed to monitor shipment status and provide real-time location updates to customers.
Insurance: Depending on order value and customer requirements, marine cargo insurance (All Risk or With Average coverage) may be arranged to cover potential losses or damages during transit.
Heavy Lift Planning: For extra-heavy pipes (over 5,000 kg per pipe), advance coordination with destination port for heavy lift handling equipment (cranes with sufficient capacity, specialized spreader bars) is recommended.
In summary, Womic Steel ensures that all EN 10248 S355GP SSAW steel piling pipes are packaged with industry-leading protective measures and shipped using reliable transportation methods to reach their destination in optimal condition.
10. Womic Steel Advantages & FAQ - EN 10248 S355GP SSAW Steel Piling Pipe
Why Partner with Womic Steel for EN 10248 S355GP SSAW Piling Pipe?
Complete Range of Sizes: SSAW process covering 508mm to 3,000mm OD, wall thickness up to 25.4mm, lengths up to 60m for deep foundation and marine piling projects.
CE Marking Available: Full compliance with European Pressure Equipment Directive (PED) 2014/68/EU. CE marking and Declaration of Performance (DoP) provided for EN standard products.
European Standard Focus: Specialized experience in EN 10248 S355GP piling applications for European, Middle Eastern, and African marine projects. Understanding of European technical requirements and documentation standards.
Sacrificial Steel Rings: In-house welding of sacrificial steel rings to pipe driving ends for enhanced protection during pile driving operations.
Value-Added Services: End beveling (30°-35°), plain end cutting, protective coating (FBE, 3LPE, Coal Tar Epoxy, Galvanizing), and anti-corrosion wrapping.
Long Length Capability: Up to 60m single length for deep foundation projects, reducing field splicing requirements and installation time.
Competitive Logistics: Strategic partnership with global freight forwarders and project cargo specialists ensures optimized loading and 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 10248 S355GP SSAW steel piling pipes for European and international marine, offshore, and deep foundation 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 10248 S355GP SSAW Steel Piling Pipe
Q: What is the difference between EN 10248 S355GP and ASTM A252 GR.3?
A: EN 10248 S355GP (European standard) has a minimum yield strength of 355 MPa, while ASTM A252 GR.3 has 345 MPa. S355GP also has more stringent chemical composition limits (lower C, P, S) and optional low-temperature impact testing requirements. Both are suitable for marine piling applications. For European, Middle Eastern, and African projects, S355GP is commonly specified.
Q: Does Womic Steel provide CE marking for EN 10248 S355GP pipes?
A: Yes. CE marking is available upon request for EN 10248 S355GP pipes. We provide Declaration of Performance (DoP) and comply with PED 2014/68/EU requirements. CE marking facilitates smooth customs clearance and project acceptance within the European Economic Area (EEA).
Q: What is the maximum single length for EN 10248 S355GP SSAW piling pipe?
A: Standard lengths are 6m, 12m, and 18m. For deep foundation and marine projects, we supply custom lengths up to 60m (200 feet) depending on diameter and wall thickness. Extra-long lengths reduce field splicing requirements.
Q: What coating options are available for EN 10248 S355GP marine piling pipe?
A: We offer FBE (Fusion Bonded Epoxy), 3LPE/3LPP (Three Layer Polyethylene/Polypropylene), Coal Tar Epoxy, Hot Dip Galvanizing, and Liquid Epoxy. For North Sea and aggressive marine environments, 3LPE coating is recommended.
Q: Can you supply piling pipe with third-party inspection (SGS, BV, TÜV, DNV, LR)?
A: Yes. We facilitate inspections by DNV, BV, SGS, TÜV, ABS, LR, or any client-nominated representative. 3.2 inspection certificates validated by authorized third-party bodies are routinely supplied upon request.
Q: What non-destructive testing (NDT) is provided for EN 10248 S355GP piling pipe?
A: Standard NDT includes 100% Ultrasonic Testing (UT) of weld seam and pipe body. Radiographic Testing (RT), MPI, and Hydrostatic Testing are available upon request. For critical marine applications, we recommend impact testing at 0°C or lower.
Q: What is the typical lead time for EN 10248 S355GP SSAW piling pipe?
A: Standard lead times are approximately 30-45 days for SSAW production, depending on order quantity, diameter, wall thickness, and testing requirements. For CE marking documentation, add 3-5 days.
Q: What documentation is provided with each shipment?
A: Each shipment includes 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 Declaration of Performance (DoP) for CE marking.






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