Description
Direct Mill Supply, No Middlemen — As a vertically integrated steel producer with our own mill and fabrication workshop, we deliver API 5L SSAW spiral welded steel pipe directly from production line to your project site, ensuring full material traceability from slab to finished pipe.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | API 5L SSAW Spiral Welded Steel Pipe |
| Product Type | SSAW Spiral Welded Steel Pipe / Round Steel Pipe |
| Steel Grade | API 5L GR A, GR B, X42, X46, X52, X56, X60, X65, X70; L210–L485; S235JR, S275JR, S355JR, S355J0H, S355J2H; Q235, Q345; SS400; BS 4360 Grade 37, Grade 50 |
| Standard | API 5L, ASTM A53, ASTM A252, EN 10219, EN 10217, GB/T 9711, SY/T 5037, BS 4360 |
| Section Shape | Round |
| Size Range | Outer Diameter 219–3048 mm |
| Wall Thickness | 5–25.4 mm |
| Length | 5.8–12.0 m (or upon customer’s requirement) |
| Technique | SSAW (Spiral Submerged Arc Welding) |
| Surface Treatment | Hot Rolled / Oiled / Non-oiled |
| Tolerance | ±1% |
| Ends | Plain / Beveled (per standard) |
| Application | Oil and natural gas pipeline transportation / Fluid transport / Bridge and building construction / Structural support / Gas distribution |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas Pipeline | Onshore and offshore crude oil transmission lines, natural gas distribution networks, gathering pipelines |
| Infrastructure & Civil Engineering | Bridge pier casings, pile foundations, structural columns for industrial buildings |
| Water & Wastewater | Raw water conveyance mains, sewage force mains, intake and outfall pipelines |
| Industrial Construction | Pipe rack supports, plant structural frames, conveyor system columns |
| Energy & Power | Wind turbine foundation piles, solar mounting structure supports, cooling water circulation lines |
What Dimensional Tolerance Costs When Spiral Pipe Meets the Trench
A ±1% tolerance on a 3048 mm OD pipe means the difference between a clean field weld and a costly re-cut.
When EPC contractors source API 5L SSAW spiral welded steel pipe for pipeline projects, the last thing they need is arriving at the trench with pipes that don’t align at the joint. Overseas buyers frequently encounter dimensional inconsistency when suppliers subcontract fabrication without controlling the forming and welding process in-house. Spiral welded pipe with out-of-roundness beyond tolerance forces field reaming, delays welding crews, and in worst cases triggers rejection during third-party inspection. [NEED_CITE: API 5L dimensional tolerance requirements for out-of-roundness and bevel accuracy] Material traceability gaps compound the problem — when the mill test certificate cannot be linked back to a specific heat number, customs authorities in the Middle East and Southeast Asia hold the shipment pending re-certification.
How Large-Diameter Spiral Pipe Meets Pipeline and Structural Demands
The OD 219–3048 mm range of API 5L SSAW spiral welded steel pipe covers everything from medium-bore gas distribution lines to large-diameter river crossing casings. The spiral submerged arc welding process produces a continuous helical seam that distributes stress more evenly across the pipe body compared to longitudinal welded alternatives, making it particularly suited for applications where external loading and internal pressure coexist. Our own steel mill produces the raw coil and plate, so every pipe we deliver carries a heat number traceable from slab chemistry to finished weld seam — no gaps in the certification chain.
Engineering Compliance Across International Standards
Pipeline projects in the Middle East typically require API 5L PSL2 compliance with full Charpy impact testing at specified temperatures, while European structural applications call for EN 10219 or EN 10217 certification with CE marking for customs clearance. [NEED_CITE: EN 10219 cold-formed structural hollow section requirements for CE marking] Our API 5L SSAW spiral welded steel pipe is produced to meet API 5L, ASTM A53, ASTM A252, EN 10219, EN 10217, GB/T 9711, and SY/T 5037 — the correct standard is applied based on your project specification and destination country. Wall thickness from 5 to 25.4 mm accommodates both high-pressure transmission lines and structural piling applications. Beveled ends per API 5L or custom bevel angles are prepared to match your field welding WPS, eliminating on-site machining delays.
Steel Grade Selection and SSAW Process Fundamentals
API 5L grade coverage from GR A through X70 allows engineers to match yield strength requirements to operating pressure and soil loading conditions — X42 and X52 serve standard gas transmission, while X60 and X65 are specified for high-pressure long-distance pipelines. The SSAW process uses spiral submerged arc welding with dual-wire configuration, producing a continuous helical seam with full penetration and consistent weld profile. This method is particularly efficient for large diameters above 508 mm where seamless production becomes cost-prohibitive. Surface treatment options include hot rolled finish for immediate burial in non-corrosive soils, oiled surface for temporary protection during transit, and custom 3PE coating or painting for aggressive environments. The ±1% dimensional tolerance applies across the full OD and wall thickness range, verified through inline ultrasonic measurement and manual calibration checks.
The Hidden Cost of Unverified Spiral Welded Pipe
Purchasing API 5L SSAW spiral welded steel pipe from fragmented suppliers without integrated material production creates cascading risks. When the fabricator sources coil from third-party mills without direct quality oversight, weld seam chemistry may not match the base metal — leading to hydrogen-induced cracking under sour service conditions. [NEED_CITE: API 5L sour service requirements and HIC testing for spiral welded pipe] Missing or incomplete mill test certificates trigger customs holds in destination countries requiring EN 10204 3.2 certification. Negative tolerance abuse — where wall thickness consistently falls at the lower limit — reduces the pressure rating below design specification, creating structural safety liability that only surfaces during hydrostatic testing at the project site.
Why Project Teams Source API 5L SSAW Spiral Welded Steel Pipe From Our Mill
Our production starts from our own steel mill with three production lines and over 2,800 raw material specifications in stock — meaning the coil and plate used for your spiral welded pipe never passes through an intermediary trader. Every heat is tested in our in-house laboratory for chemical composition and mechanical properties before the pipe is even formed. The fabrication workshop operates certified welding procedures per API 5L and EN standards, with qualified welders holding current certifications. Shop drawing review and material optimization support is provided before production begins, reducing the risk of specification mismatches. Complete quality documentation packages — including WPS, PQR, weld maps, dimensional inspection reports, and coating reports — are prepared for every shipment. Third-party inspection through SGS, BV, or TUV is arranged at our facility before loading, so your inspector verifies the product on our floor, not at a distant warehouse.
Documentation & Compliance
- Mill Test Certificate documenting API 5L X42–X70 chemical composition, yield strength, tensile strength, and elongation per heat number, conforming to EN 10204 3.1 format
- CE Certificate for EN 10219 and EN 10217 structural and pressure pipe applications, required for customs clearance in European Union member states
- ISO 9001 quality management system certificate covering the full production chain from raw material procurement through finished pipe inspection
- SGS, BV, or TUV third-party inspection report verifying dimensional accuracy, weld seam quality, and coating thickness prior to shipment
- Full material traceability linking each pipe to its heat number, with chemical composition and mechanical test results available for every coil and plate used
- Complete customs documentation package including packing list, bill of lading, certificate of origin, and commercial invoice formatted to destination country requirements
Packaging, Loading & Delivery
- API 5L SSAW spiral welded steel pipe bundled with steel strip bands at intervals matching the 5.8–12.0 m length range, with end protectors preventing damage to beveled edges during handling
- Oiled surface pipes wrapped in waterproof cloth and secured within steel-framed crates to prevent coating degradation during ocean transit to Middle East and Southeast Asian ports
- Large diameter pipes above 1500 mm OD loaded on flat racks or in bulk vessel holds with custom wooden cradles and steel wire lashing to prevent rolling and contact damage
- Heat number and steel grade stenciled on each pipe end with weather-resistant paint, matching the mill test certificate for field verification upon arrival
- Custom cut lengths available within the 5.8–12.0 m range to match project-specific transportation constraints and reduce on-site cutting waste
- FOB, CIF, and DDP shipping terms available with professional oversized cargo loading plans and complete export documentation for door-to-door delivery
Ready to Verify Our Mill Test Certificates Before You Commit
Submit your project specifications — including OD, wall thickness, steel grade, applicable standard, and destination port — and we respond within 24 hours with a detailed quotation, production schedule, and sample mill test certificate from a recent API 5L SSAW spiral welded steel pipe order in your specified grade.
Request Your Quotation and Mill Test Documentation Today
Send your project drawings and material specifications to receive a detailed quotation with production timeline and sample quality documentation.
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: How do you ensure material traceability from raw steel to finished API 5L SSAW spiral welded steel pipe?
A: Our own steel mill produces the coil and plate used in production, with each heat assigned a unique number. Every pipe carries this heat number, and the corresponding mill test certificate documents chemical composition and mechanical properties for that specific heat — no third-party material sourcing gaps.
Q: Can you produce API 5L SSAW spiral welded steel pipe to both API 5L and EN 10219 standards for the same project?
A: Yes. We produce to API 5L, ASTM A53, ASTM A252, EN 10219, EN 10217, GB/T 9711, and SY/T 5037. The applicable standard is determined by your project specification and destination country requirements, and the correct certification and documentation package is prepared accordingly.
Q: What surface treatment options are available for API 5L SSAW spiral welded steel pipe?
A: Standard options include hot rolled finish, oiled surface for transit protection, and non-oiled bare pipe. Custom coatings including 3PE anti-corrosion coating and painting are available per project specification for aggressive soil or marine environments.
Q: What is the minimum order quantity and can you accommodate custom lengths?
A: The minimum order quantity is 5 tons. Standard length range is 5.8–12.0 m, and custom cut lengths are available within this range to match your project transportation and installation requirements.
Q: Do you support third-party inspection before shipment?
A: Yes. SGS, BV, and TUV third-party inspections are arranged at our facility prior to loading. The inspector verifies dimensional accuracy, weld seam quality, surface treatment, and documentation against your purchase order and applicable standard.
