Description
Direct Mill Supply, Zero Middlemen — We roll the steel, weld the pipe, and coat the finished product under one roof in Jinan, so every SSAW spiral steel pipe leaves our facility with full heat-number traceability from slab to shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SSAW Spiral Steel Pipe |
| Product Type | Spiral Steel Pipe (SSAW) |
| Steel Grade | API 5L GR A, GR B, X42, X46, X52, X56, X60, X65, X70, Q235, Q345, L210–L485, S235, S275, S355, SS400 |
| Standard | API 5L, ASTM A53, ASTM A252, GB/T 9711, GB/T 3091, SY/T 5037, EN 10219, EN 10217, BS 4360 |
| Section Shape | Round |
| Size Range (OD) | 219–3048 mm |
| Wall Thickness | 5–25.4 mm |
| Length | 5.8–12.0 m (or custom) |
| Technique | SSAW (Spiral Submerged Arc Welding) |
| Surface Treatment | Hot Rolled / Zinc Coated (Galvanized) / 3PE Anti-Corrosion / Painted / Oiled / Black |
| Tolerance | ±1% |
| Ends | Plain / Beveled |
| Application | Water supply pipeline / Oil & gas pipeline transportation / Bridge & building construction / Fluid transport / Structural piling / Industrial pipeline systems |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Municipal Infrastructure | Water supply mains, drainage networks, stormwater outfall lines |
| Oil & Gas EPC | Buried transmission pipelines, gathering lines, cross-country fluid transport |
| Bridge & Civil Engineering | Structural piling, bridge foundation casings, river-crossing support columns |
| Industrial Construction | Factory pipe racks, process fluid lines, cooling water circuits |
| Building Construction | Load-bearing column sleeves, basement retaining structures |
Why Wall-Thickness Tolerance Decides Whether Your Piling Passes Load Calculation
A ±1% tolerance on a 3048 mm OD pipe is not a rounding detail — it is the difference between a foundation that holds and one that fails audit.
When EPC firms source SSAW spiral steel pipe for structural piling or pressure pipelines, the wall thickness directly governs buckling resistance and hydrostatic capacity. I have seen project engineers reject an entire batch because the measured wall at the weld seam fell below the minimum specified in the drawing — even though the mill certificate looked clean. The problem is that some fabricators quote theoretical weight and ship pipes with negative tolerance stacked at the thinnest allowable point. On a 25.4 mm wall, 300 microns of shortfall across a 12-meter joint sounds minor on paper, but under EN 1993 or API 5L load calculations, it shifts the safety factor. Our integrated mill in Jinan controls the plate thickness before forming, so the tolerance stays within ±1% across the full circumference — not just at the sample point. [NEED_CITE: API 5L dimensional tolerance requirements for wall thickness]
Matching Pipe Dimensions to Piling and Pipeline Environments
The 219–3048 mm OD range covers everything from municipal water distribution to large-diameter river-crossing casings. For structural piling, engineers typically specify API 5L GR B or X42–X52 with beveled ends ready for field welding. In corrosive soil or marine splash zones, the 3PE anti-corrosion coating or zinc-coated finish extends service life without adding field-applied wrap costs. As an SSAW spiral steel pipe supplier with our own steel production line, we match the forming angle and welding parameters to each OD-wall combination, ensuring the spiral seam maintains consistent penetration depth regardless of diameter.
Engineering Compliance Across API, EN, and GB Frameworks
Structural and pipeline projects demand certification alignment with the destination market. EN 10219 and EN 10217 govern European structural and pressure applications, while API 5L and ASTM A53 dominate North American and Middle Eastern pipeline tenders. GB/T 9711 and SY/T 5037 serve domestic and Belt & Road energy projects. Our SSAW spiral steel pipe production holds compliance across these standards simultaneously, meaning a single order can ship to Rotterdam, Lagos, or Dubai with the correct certificate format for each customs authority. We provide EN 10204 3.1/3.2 mill test certificates with full heat-number traceability, and we welcome third-party inspection from SGS, BV, or TÜV at any production stage. [NEED_CITE: EN 10219 cold-formed and SSAW hollow section compliance requirements]
Steel Grade Selection and SSAW Welding Mechanics
The steel grades we offer span three major classification systems. API 5L X42 through X70 uses the “X” designation where the number indicates minimum yield strength in ksi — X70 delivers roughly 483 MPa minimum yield, suitable for high-pressure gas transmission. The S-series (S235, S275, S355) follows EN standards with metric yield values, commonly specified for European structural piling and building frames. Q235 and Q345 follow the Chinese GB system, widely used in Southeast Asian and African infrastructure projects where cost optimization matters without sacrificing structural integrity. The SSAW process itself — spiral submerged arc welding — forms the pipe continuously from coiled plate, allowing large diameters up to 3048 mm that would be impossible with seamless or ERW methods. The spiral weld angle distributes stress more evenly than a straight seam, and dual-sided submerged arc welding ensures full penetration on walls up to 25.4 mm.
The Hidden Cost of Sourcing Without Mill Integration
When buyers purchase from trading companies rather than integrated producers, material traceability breaks at the first link. The trader buys plate from one mill, sends it to a separate forming shop, then outsources coating to a third facility. If the pipe fails NDT or the coating thickness falls below specification, each party blames the next. On a recent project, an African contractor received SSAW spiral steel pipe with zinc coating measured at 45μm against a 65μm contract requirement — the entire batch was rejected, and the ocean freight loss exceeded the pipe cost. With our vertically integrated operation, the plate rolls, the pipe forms, the weld fuses, and the coating applies under one quality management system. Every heat number on the mill test certificate links back to our own steelmaking records. [NEED_CITE: material traceability requirements under EN 10204 3.2 certification]
Procurement Confidence from a Vertically Integrated SSAW Spiral Steel Pipe Supplier
Our Jinan facility operates three production lines for steel plate and over 2,800 raw material specifications in stock, eliminating the waiting period for plate procurement. The fabrication workshop handles CNC cutting, beveling, welding, shot blasting, and coating in sequence — no component leaves the site without dimensional inspection and coating thickness verification. We hold certified welding procedures (WPS/PQR) and qualified welders under AWS and EN standards, with complete documentation packages including weld maps, NDT reports, and hydrostatic test certificates. For overseas buyers, we manage the full export process: professional packing for oversized cargo, container or break-bulk loading plans, and door-to-door logistics coordination.
Documentation & Compliance
- Mill Test Certificate per EN 10204 3.1/3.2 documenting API 5L X42–X70 chemical composition, yield strength, and tensile properties with heat-number traceability
- CE compliance certificate for EN 10219 and EN 10217 structural and pressure hollow sections, required for European Union customs clearance
- ISO 9001 quality management certificate covering the full production chain from steelmaking through SSAW forming, welding, and surface treatment
- SGS / BV / TÜV third-party inspection reports for dimensional verification, weld NDT (UT/RT), and coating thickness measurement upon buyer request
- Complete export documentation package: packing list, bill of lading, certificate of origin, and coating inspection reports for each shipment
- Weld procedure qualification records (WPS/PQR) and welder qualification certificates per AWS D1.1 or EN ISO 15614 standards
Packaging, Loading & Delivery
- SSAW spiral steel pipe bundled with galvanized steel strips at maximum 1.5-meter intervals, with rubber edge protectors to prevent zinc coating damage during handling and ocean transit
- 3PE anti-corrosion coated pipes wrapped with PE film and separated by soft spacers to avoid coating abrasion between adjacent pipes in the bundle
- Large-diameter pipes (OD above 1500 mm) shipped as individual pieces with custom steel cradles for break-bulk or flat-rack container loading, optimized for 12-meter length to maximize container utilization
- Beveled-end pipes fitted with plastic end caps to protect the weld preparation geometry during transport and prevent moisture ingress at the pipe interior
- Each pipe marked with heat number, steel grade, OD, wall thickness, and length at 1-meter intervals using weather-resistant paint stencils for site identification
- Shipping terms available as FOB Qingdao, CIF destination port, or DDP project site, with professional lashing plans for oversized cargo documented before container sealing
Ready to Start Your SSAW Spiral Steel Pipe Procurement
Send your project drawings (PDF or DWG), steel grade requirements, quantity, and destination port — we respond within 24 hours with a detailed quotation including material cost, fabrication, coating, packing, and shipping breakdown. Our engineering team will prepare shop drawings for your approval before production begins, and we confirm all certification and third-party inspection arrangements at the contract stage.
Request Your SSAW Spiral Steel Pipe Quotation Today
Submit your specifications, steel grade, and destination port to receive a detailed quotation with mill test certificate confirmation within 24 hours.
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
