Description
Factory-direct SSAW steel pipe pile supplier — Produced in our own steel mill with integrated fabrication workshop, delivering Q235B and Q345B spiral welded pipe piles in 20–1100 mm OD without third-party markup.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SSAW Steel Pipe Pile |
| Product Type | Spiral Submerged Arc Welded Steel Pipe Pile |
| Steel Grade | Q235B, Q345B, Q195, S355, ASTM A252 Grade 3, St37, St42, St37-2, St35.4, St52.4, St35, Grade 1, Grade 2, Grade 3 |
| Standard | ASTM A252, ASTM A53, ASTM A106, GB, DIN, EN |
| Section Shape | Round |
| Outer Diameter | 20–1100 mm |
| Wall Thickness | 2–50 mm |
| Length | 6–70 m or customized |
| Technique | Double-sided Submerged Arc Welded (SSAW) |
| Surface Treatment | Bare, Black Paint, PE, Epoxy, 3PE, 3LPE, Zinc, Galvanized, Bitumen Coated |
| Tolerance | ±1% |
| Ends | Beveled, Plain (cutting, beveling, welding ring, and shoe fabrication available) |
| Application | Metro deep foundation, building foundations, bridge piers, marine piling, offshore platforms, wind power tower foundations |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Metro & Urban Infrastructure | Deep foundation piling for metro stations, underground tunnel support, retaining wall systems |
| Marine & Port Engineering | Dock fender piles, jetty structures, seawall reinforcement, offshore platform foundations |
| Bridge & Highway Construction | Bridge pier foundations, highway sound barrier supports, elevated road substructures |
| Industrial & Energy | Wind power tower monopile foundations, industrial plant heavy-load footings, equipment support piles |
What Wall-Thickness Tolerance Costs on a Deep Foundation Order
A ±1% tolerance on SSAW steel pipe pile wall thickness determines whether your piles pass third-party inspection or get rejected at the port.
When overseas buyers source pipe piles from fragmented suppliers, wall thickness often drifts beyond acceptable limits — especially on large-diameter orders where the inner weld seam is hard to verify without ultrasonic testing. I have seen batches arrive at African port sites with negative tolerance exceeding acceptable ranges, forcing complete rejection and re-rolling. The resulting vessel delays and demurrage charges far exceed any initial price saving. Material traceability gaps compound the problem: when the fabricator sources raw plates from multiple mills, heat number documentation becomes unreliable, and customs authorities in strict markets may hold the entire shipment. [NEED_CITE: ASTM A252 dimensional tolerance requirements for steel pipe piles]
How SSAW Pipe Piles Match Deep Foundation and Marine Engineering Demands
Spiral submerged arc welding produces a continuous helical seam with uniform penetration on both inner and outer surfaces — critical when pipe piles must withstand lateral soil pressure and cyclic loading in metro excavation or marine environments. The SSAW steel pipe pile range from 20 mm to 1100 mm OD covers everything from small-diameter underpinning piles to large monopiles for wind tower foundations. Our integrated mill-to-fabrication workflow means the same quality system controls plate rolling, welding, and final coating — eliminating the material certification gap that occurs when fabricators source third-party plates.
Engineering Compliance and Corrosion Protection for Piling Projects
Structural piling must conform to load-bearing standards such as ASTM A252 for foundation piles or EN standards for European market projects. Steel grade selection directly affects load capacity: Q345B and S355 grades provide higher yield strength for deep foundation applications where soil bearing pressure is significant, while Q235B and St37 grades suit lighter-duty retaining wall and temporary works. For marine and underground environments, corrosion protection becomes the governing specification — 3PE coating provides long-term resistance in submerged conditions, bitumen coating suits buried applications, and hot-dip galvanizing protects splash zones. Third-party inspection per SGS or BV protocols verifies coating thickness, adhesion, and holiday detection before shipment. [NEED_CITE: corrosion protection standards for steel pipe piles in marine environments]
Steel Grade Selection and SSAW Welding Process Explained
The Q-series grades (Q195, Q235B, Q345B) follow the Chinese GB standard system where the number indicates minimum yield strength in MPa — Q345B delivers approximately 50% higher yield capacity than Q235B, making it the preferred choice for load-bearing foundation piles. The S-series (St37, St42, S355) and ASTM A252 Grade 1/2/3 system serve European and North American specifications respectively, with equivalent mechanical performance across standards. [NEED_CITE: steel grade equivalence between GB Q-series and EN S-series standards]
Double-sided submerged arc welding distinguishes SSAW pipe piles from ERW alternatives: the spiral seam is welded from both inside and outside simultaneously under flux coverage, producing full-penetration welds with smooth internal surfaces — essential when piles must be driven through dense soil without seam failure. The helical seam geometry also allows production of large diameters from narrower plate stock, reducing material cost compared to LSAW for diameters above 500 mm. Surface treatment selection follows the service environment: bare or black-painted piles suit temporary works or dry conditions, 3PE and epoxy coatings protect against chemical soil corrosion, and galvanized finishes resist atmospheric and splash-zone degradation.
Wall thickness tolerance of ±1% ensures that theoretical weight calculations match actual delivered weight — critical for structural engineers who design pile capacity based on section modulus. Negative tolerance beyond specification reduces load-bearing cross-section and may trigger rejection during inspector verification.
Hidden Costs of Sourcing Pipe Piles from Unverified Suppliers
Purchasing SSAW steel pipe pile from traders or un-integrated fabricators introduces three categories of hidden cost. First, material certification gaps: when raw plates come from unverified mills, chemical composition and mechanical properties cannot be traced to specific heat numbers — a disqualifying issue for projects requiring EN 1090 or AISC compliance. Second, welding quality uncertainty: without certified WPS/PQR procedures and qualified welders, seam defects such as incomplete fusion or porosity may only surface during ultrasonic testing at the destination port. Third, dimensional non-compliance: wall thickness and ovality beyond tolerance cause driving difficulties, pile damage during installation, and structural engineer rejection. [NEED_CITE: quality documentation requirements for structural steel in international construction projects]
Why Procure SSAW Steel Pipe Pile from Our Integrated Facility
Our production begins at the steel mill, where we control plate chemistry and rolling parameters for Q235B, Q345B, and S355 grades — then continue into the fabrication workshop where the same material becomes finished SSAW steel pipe pile with verified weld procedures. This vertical integration means one mill test certificate traces from raw slab to finished pile, one quality system governs the entire process, and one point of accountability handles your order. Our workshop holds certified welding procedures per AWS and EN standards, with qualified welders producing double-sided submerged arc seams on diameters up to 1100 mm. We maintain 2,800+ specifications of raw material in stock, enabling typical production lead times without waiting for third-party plate delivery. Custom end fabrication — including beveling, welding ring attachment, and pile shoe installation — reduces on-site preparation work for your foundation crew.
Documentation & Compliance
- Mill test certificate documenting Q235B or Q345B chemical composition and mechanical properties per GB standard, with heat number traceability from raw plate to finished SSAW steel pipe pile
- Third-party inspection report from SGS or BV covering dimensional verification, ultrasonic weld testing, and coating thickness measurement per project specification
- Welding procedure specification (WPS) and procedure qualification record (PQR) for double-sided submerged arc welding, certified per AWS D1.1 or EN ISO 15614
- Coating inspection report detailing surface preparation grade, dry film thickness, adhesion test results, and holiday detection for 3PE, epoxy, or bitumen-coated piles
- Export documentation package including packing list, bill of lading, certificate of origin, and fumigation certificate for destination customs clearance
- Dimensional inspection report covering outer diameter, wall thickness, length, and ovality measurements per ±1% tolerance specification
Packaging, Loading & Delivery
- Q235B and Q345B SSAW steel pipe piles bundled with steel strips and edge protectors to prevent coating damage during ocean transit, with bundle weight optimized for container or breakbulk loading
- Bitumen-coated or 3PE-coated pipe piles wrapped with protective film and separated by rubber spacers to preserve anti-corrosion coating integrity throughout handling and shipping
- Large-diameter piles (above 600 mm OD) and long-length sections (up to 70 m) loaded on flat-rack containers or breakbulk vessels with professional lashing and securing per maritime transport standards
- Custom cut-to-length services available for 6–70 m requirements, with cut ends protected by plastic caps to prevent corrosion and edge damage before installation
- Heat number and steel grade markings stenciled on each pile end for site identification and material traceability verification during foundation installation
- FOB, CIF, and DDP delivery terms available with professional export documentation and tracking until site delivery at destination port
Start Your SSAW Steel Pipe Pile Inquiry
Submit your project drawings, required steel grade (Q235B, Q345B, S355, or ASTM A252), outer diameter, wall thickness, quantity, and destination port — we respond within 24 hours with a detailed quotation including material, fabrication, coating, and shipping costs. Our engineering team will review your specifications, confirm applicable standards, and provide shop drawing support before production begins.
Request Your SSAW Steel Pipe Pile Quotation
Share your project specifications, steel grade requirements, and destination port to receive a detailed quotation with mill test certificate documentation and production timeline.
Company: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.xjystructure.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@xjystructure.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
Frequently Asked Questions
Q: What is the difference between SSAW and LSAW pipe piles for foundation construction?
A: SSAW (spiral submerged arc welded) pipe piles use helical seam welding, allowing production of large diameters from narrower plate stock at lower cost. LSAW (longitudinal submerged arc welded) uses straight seam welding, typically for smaller diameters or specific project specifications. For diameters above 500 mm, SSAW offers material efficiency advantages while maintaining full-penetration weld quality through double-sided welding.
Q: Which anti-corrosion coating is suitable for marine piling versus underground foundation applications?
A: For marine environments including splash zones and offshore platforms, 3PE coating or hot-dip galvanizing provides long-term corrosion resistance against saltwater exposure. For buried underground applications such as metro deep foundations and building footings, bitumen coating offers cost-effective protection against soil corrosion. Epoxy coating suits intermediate conditions where chemical resistance is required.
Q: Can you provide material traceability documentation for international projects requiring EN 1090 or AISC compliance?
A: Yes. Our vertically integrated production from steel mill to finished SSAW steel pipe pile ensures complete material traceability. Each pile carries a unique heat number linking to mill test certificates documenting chemical composition and mechanical properties. We provide welding procedure specifications (WPS), procedure qualification records (PQR), and third-party inspection reports from SGS or BV for projects requiring international standard compliance.
Q: What custom fabrication services do you offer for pipe pile installation?
A: We provide end fabrication services including cutting to project-specified lengths (6–70 m), beveling for field welding, welding ring attachment for pile connections, and pile shoe fabrication for driving protection. These services reduce on-site preparation work and ensure connection compatibility with your foundation design specifications.
Q: How do you handle shipping for oversized and heavy SSAW pipe piles?
A: Large-diameter piles above 600 mm OD and long-length sections require specialized loading planning. We coordinate flat-rack container loading for manageable sizes or breakbulk vessel booking for oversized shipments. Professional lashing, securing, and export documentation ensure safe transit. Our team provides loading supervision and tracking until delivery at your destination port.
