Description
Certified mill-direct SSAW welded steel pipe — complete material traceability from our own slab production to finished coated pipe eliminates third-party sourcing gaps.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Carbon Steel SSAW Welded Steel Pipe |
| Product Type | SSAW Welded Steel Pipe / Spiral Submerged Arc Welded Steel Pipe |
| Steel Grade | Carbon steel |
| Standard | GB / API / JIS / GS / ISO 9001 |
| Section Shape | Round |
| Size Range | OD 159mm – 3200mm |
| Wall Thickness | 3mm – 30mm |
| Length | 5.8m – 11.8m or as customer’s requirements |
| Technique | SSAW Welded (Spiral Submerged Arc Welded) |
| Surface Treatment | Hot Rolled / with or without varnish / 2PP / 2PE / 3PE / 3PP / FBE coating |
| Tolerance | ±1% |
| Ends | Bevelled or plain ends as buyer’s request |
| Application | Piling project / Heat-supply project / Chemistry industry / Construction pipe / Sewage treatment / Sanitation pipe / Water supply |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Infrastructure & Piling | Foundation piling for bridges, high-rise buildings, and port structures |
| Municipal Engineering | Heat-supply distribution networks, water supply mains, sewage treatment pipelines |
| Industrial Construction | Chemical process piping, plant utility lines, sanitation drainage systems |
| EPC Projects | Large diameter structural columns, pipeline supports, and industrial facility frameworks |
Where Material Traceability Decides Customs Clearance for Large Diameter SSAW Welded Steel Pipe
Single-source production from slab to coated pipe closes the certification chain that fragmented procurement leaves open.
Overseas buyers ordering large diameter spiral welded pipe from trading companies often discover material traceability gaps only at customs inspection. The mill test certificate references a steel mill the fabricator never contracted — chemical composition reports don’t match heat numbers on the pipe markings, and third-party inspectors flag documentation inconsistencies before the container even reaches the project site. [NEED_CITE: EN 10219 cold-formed hollow section material traceability requirements]
When fabrication and raw material production operate under one quality system, every heat number on the pipe corresponds to a verifiable slab certificate from the same facility. This eliminates the documentation chain breaks that cause shipment holds and re-inspection costs at destination ports.
Matching OD 3200mm SSAW Welded Steel Pipe to Piling and Pipeline Applications
Large diameter SSAW welded steel pipe from 159mm to 3200mm outer diameter serves applications where structural load capacity and corrosion resistance determine service life. For piling foundations in marine and riverine environments, the spiral submerged arc welding process produces continuous helical seams that distribute stress more evenly than longitudinal welds under axial compression loads. Multi-layer coating options including 2PP, 3PE, and FBE provide differentiated protection for underground burial versus submerged service conditions.
Engineering Compliance and Surface Treatment Selection
Structural piling applications require dimensional accuracy within ±1% tolerance to ensure proper driving and load transfer at foundation interfaces. For heat-supply and water distribution networks operating in corrosive soil conditions, 3PE coating systems combine epoxy primer, adhesive copolymer, and polyethylene outer layer to resist cathodic disbondment over decades of buried service. Chemical industry applications demand FBE coating for high-temperature resistance and chemical inertness. Third-party inspection by SGS or BV verifies coating thickness, adhesion strength, and holiday detection before shipment. [NEED_CITE: ISO 21809 pipeline coating system specifications]
SSAW Process Advantages for Large Diameter Carbon Steel Pipe
Spiral submerged arc welding enables production of large diameter pipe from narrower coil stock, reducing material waste compared to plate-based longitudinal welding for diameters above 1000mm. The helical weld seam geometry distributes residual stress more uniformly around the pipe circumference, improving fatigue performance under cyclic loading conditions typical in piling and bridge support applications. Carbon steel grades meeting GB, API, and JIS standards provide yield strength sufficient for structural piling while maintaining weldability for field connection by qualified welders following approved WPS procedures.
Surface treatment selection depends on service environment: hot rolled finish for temporary structural applications, varnish coating for short-term corrosion protection during storage and transport, 2PE/3PE for underground water and sewage pipelines, 3PP for high-temperature heat-supply networks, and FBE for chemical resistance in industrial process piping. Each coating system undergoes adhesion testing and thickness verification per applicable standards before release.
Hidden Costs of Negative Tolerance and Certification Gaps
Wall thickness below specified tolerance reduces pressure rating and structural load capacity — a 600mm pipe with actual wall thickness 0.5mm under nominal specification carries significantly lower moment capacity than engineering calculations assume. When third-party inspection at destination reveals negative tolerance exceeding permissible limits, the entire shipment faces rejection, rework, or scrap disposal costs that dwarf the original price savings from unverified sourcing. Material certificates referencing unknown mills create customs clearance delays and potential rejection under anti-dumping regulations requiring verifiable country of origin documentation. [NEED_CITE: API 5L dimensional tolerance requirements for line pipe]
Why Source SSAW Welded Steel Pipe from Our Integrated Facility
Our steel production facility operates three dedicated production lines with over 2,800 raw material specifications in inventory, enabling immediate slab allocation for SSAW pipe orders without third-party material procurement delays. In-house理化 testing laboratory performs chemical composition analysis, tensile testing, and impact testing on every heat, with results documented in mill test certificates traceable by heat number from slab to finished pipe. Certified welding procedures and qualified welders ensure every spiral seam meets AWS and international standards, with full NDT documentation including X-ray and ultrasonic testing reports. Professional loading teams specialize in oversized cargo securing for large diameter pipe, preventing transit damage during ocean shipment to project sites across the Middle East, Southeast Asia, and Africa.
Documentation & Compliance
- Mill test certificate documenting carbon steel chemical composition and mechanical properties per GB/API/JIS standards with heat number traceability
- Third-party inspection report from SGS or BV verifying dimensional accuracy, weld quality, and coating thickness
- Certified welding procedure specifications (WPS) and procedure qualification records (PQR) for SSAW spiral seam welding
- Coating inspection reports including adhesion test results, thickness measurements, and holiday detection for 2PP/3PE/FBE systems
- Complete export documentation: packing list, bill of lading, certificate of origin, and customs clearance certificates
- Material traceability documentation linking each pipe to specific slab heat number and production batch records
Packaging, Loading & Delivery
- Large diameter SSAW welded steel pipe bundled with steel strips and edge protectors to prevent coating damage during handling and ocean transit
- Surface protection: 3PE/3PP/FBE coated pipe wrapped with protective film; uncoated pipe ends capped and oiled to prevent corrosion during storage
- Container loading optimization: 5.8m and 11.8m lengths configured for maximum 20ft and 40ft container utilization; oversized diameter pipe loaded on flat rack or open top containers
- Custom cutting to project-specified lengths beyond standard 5.8m-11.8m range, with bevelled or plain ends prepared per drawing requirements
- Heat number and steel grade markings stenciled on each pipe for site identification and traceability verification
- FOB/CIF/DDP delivery terms available with professional export documentation and door-to-door logistics coordination to project sites
Submit Project Specifications for SSAW Welded Steel Pipe Quotation
Provide project drawings specifying outer diameter, wall thickness, length, steel grade, surface treatment, and quantity to receive detailed quotation including material, fabrication, coating, packing, and shipping costs within 24 hours. Our engineering team reviews specifications for manufacturability and provides shop drawing confirmation before production begins, ensuring dimensional accuracy and coating system suitability for your application environment.
Request SSAW Welded Steel Pipe Quotation with Mill Test Certificate
Submit your project specifications including OD, WT, length, coating requirements, and destination port to receive comprehensive quotation with complete quality documentation package.
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 does vertical integration ensure material traceability for SSAW welded steel pipe?
A: Our own steel production facility manufactures slabs that feed directly into SSAW pipe production, with chemical composition and mechanical properties tested in our in-house laboratory for every heat. Each finished pipe carries a heat number that traces back to the original slab certificate, eliminating third-party material sourcing gaps that create documentation chain breaks.
Q: What are the differences between 2PE, 3PE, and FBE coatings for SSAW welded steel pipe?
A: 2PE coating provides basic corrosion protection for short-term underground service; 3PE combines epoxy primer, adhesive copolymer, and polyethylene outer layer for long-term buried pipeline applications with superior cathodic disbondment resistance; FBE (fusion bonded epoxy) offers high-temperature resistance and chemical inertness for industrial process piping and heat-supply networks operating at elevated temperatures.
Q: What NDT testing methods verify SSAW welded seam quality?
A: All spiral submerged arc welded seams undergo 100% X-ray radiographic testing and ultrasonic flaw detection per applicable standards, with full documentation including weld maps and defect reports. Hydrostatic testing verifies pressure integrity for pipeline applications, and results are documented in third-party inspection reports available from SGS or BV upon request.
Q: Can non-standard lengths and wall thicknesses be produced for SSAW welded steel pipe?
A: Yes, beyond standard 5.8m-11.8m lengths, we produce custom cut-to-length pipe per project requirements. Wall thickness from 3mm to 30mm and outer diameter from 159mm to 3200mm are available within ±1% tolerance. End treatments including bevelled or plain ends are prepared per engineering drawings and international standards.
Q: How are large diameter SSAW welded steel pipe packed for overseas shipment?
A: Large diameter pipe is bundled with steel strips and edge protectors to prevent coating damage. Coated pipe receives additional protective film wrapping, while uncoated pipe ends are capped and oiled. Container loading is optimized for standard lengths, with oversized diameter pipe shipped on flat rack or open top containers. Professional loading teams secure cargo to prevent transit damage during ocean shipment.
Get Your SSAW Welded Steel Pipe Project Started
Send your project drawings and specifications to receive detailed quotation with mill test certificates and complete quality documentation within 24 hours.
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
