Description
Factory-Direct SSAW Pipe Mill — Shandong Xin Jiyuan Special Steel Tube Co., Ltd operates three dedicated SSAW production lines with in-house physical and chemical laboratories, delivering Carbon Steel SSAW Welded Steel Pipe Large Diameter Supplier pricing without trading company markups.
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 |
| Section Shape | Round |
| Size Range | Outer Diameter 159mm – 3200mm |
| Wall Thickness | 3mm – 30mm |
| Length | 5.8m – 11.8m (or as customer’s requirements) |
| Technique | SSAW Welded |
| Surface Treatment | Hot Rolled / Varnish / 2PP / 2PE / 3PE / 3PP / FBE coating |
| Tolerance | ±1% |
| Ends | Bevelled or plain ends |
| Oiled or Non-oiled | Non-oiled |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Application | Piling, Heat-supply, Chemistry industry, Construction, Sewage treatment, Sanitation, Water supply |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Piling foundations for bridge and port infrastructure |
| Construction Companies | District heating network mains and water transmission pipelines |
| System Integrators | Sewage treatment plant intake and outfall pipelines |
| Industrial Distributors | Chemistry industry process piping and structural columns |
When Wall-Thickness Tolerance Decides Project Acceptance on Large Diameter Pipe Orders
Negative tolerance exceeding 1.5mm on a 600mm SSAW pipe can trigger batch rejection at third-party inspection before shipment.
Engineering procurement teams ordering a Carbon Steel SSAW Welded Steel Pipe Large Diameter Supplier often discover specification gaps only when the cargo arrives at the destination port. Inconsistent wall thickness across the spiral weld seam, missing mill test certificates, or unclear steel grade traceability create customs delays and on-site rework costs that far exceed the original price difference between suppliers. [NEED_CITE: SSAW pipe wall thickness tolerance requirements per GB/T 9711]
Matching Large Diameter SSAW Pipe to Piling and Heat-Supply Infrastructure
Carbon Steel SSAW Welded Steel Pipe Large Diameter Supplier products in the 159mm to 3200mm outer diameter range serve piling foundations where spiral weld geometry distributes axial loads across soil strata. For heat-supply networks operating at elevated temperatures, the 3mm to 30mm wall thickness range accommodates both low-pressure distribution mains and high-temperature transmission lines. Our in-house laboratory verifies each heat number against GB standard requirements before releasing coils for forming, ensuring weld seam integrity matches the base metal properties.
Engineering Compliance and Surface Treatment Selection for Corrosive Environments
Large diameter SSAW pipes installed in sewage treatment facilities or coastal piling projects face aggressive chloride exposure that demands systematic corrosion protection. [NEED_CITE: FBE and 3PE coating selection criteria for buried steel pipelines] The choice between 2PP, 2PE, 3PE, 3PP, and FBE coatings depends on soil resistivity, operating temperature, and design service life specified in project documentation. For chemistry industry applications handling corrosive media, FBE coating provides chemical resistance while 3PE systems offer mechanical protection during backfilling. GB standard compliance ensures dimensional accuracy for field welding between joints, and bevelled ends prepared to project specifications reduce on-site preparation time.
SSAW Welding Process and Carbon Steel Grade Interpretation
Spiral submerged arc welding produces a helical seam that distributes residual stress more evenly than straight seam alternatives, making SSAW the preferred process for large diameter pipes where circumferential weld length would be excessive in longitudinal configurations. Carbon Steel grades under GB specifications provide adequate yield strength for piling and water transmission applications while maintaining weldability in field conditions. The ±1% tolerance specification applies to outer diameter measurements, while wall thickness verification through ultrasonic testing at multiple clock positions around the pipe circumference confirms uniform forming pressure. Hot rolled surface condition suits applications where field coating will be applied, while factory-applied 3PE or FBE coatings eliminate on-site surface preparation requirements.
Hidden Costs of Incorrect Steel Grade Selection and Missing Documentation
Specifying a Carbon Steel SSAW Welded Steel Pipe Large Diameter Supplier without verified mill test certificates risks customs holds when destination country inspectors cannot confirm chemical composition against purchase order requirements. Material substitution—supplying a lower grade than specified—creates structural safety concerns in piling applications where bearing capacity calculations depend on verified yield strength. [NEED_CITE: material traceability requirements for structural steel in construction projects] Negative tolerance exceeding specification limits reduces load-bearing capacity while appearing compliant on theoretical weight invoices, forcing project engineers to either reject the shipment or redesign foundations around actual as-built dimensions.
Why Engineering Procurement Teams Source SSAW Pipe from Shandong Xin Jiyuan
Our three dedicated SSAW production lines cover outer diameters from 159mm to 3200mm with wall thicknesses up to 30mm, eliminating the need to coordinate multiple suppliers for different diameter ranges on the same project. The in-house physical and chemical laboratory performs incoming material inspection, in-process weld seam verification, and final dimensional checks before shipment, with original mill test certificates documenting each heat number. ISO 9001:2015 certification, Lloyd’s Register EU CE marking under EN 10210/10219, and third-party verification through SGS and BV provide the documentation package required for customs clearance across 50+ export destinations. Professional loading plans optimize container utilization for 5.8m and 11.8m lengths while protecting factory-applied coatings during ocean transit. Custom non-standard lengths and end treatments accommodate project-specific requirements without minimum order quantity penalties typical of larger mills.
Documentation & Compliance
- Mill test certificate documenting Carbon Steel chemical composition and mechanical properties per GB standard for each heat number
- CE certificate under EN 10210/10219 for projects requiring European market compliance
- ISO 9001:2015 quality management system certificate covering full production process
- SGS or BV third-party inspection report available upon request for destination country customs requirements
- Material traceability documentation linking each pipe to its heat number and production batch
- Complete customs document package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Carbon Steel SSAW pipes bundled with steel strips and edge protectors to preserve bevelled end geometry during handling
- Factory-applied 3PE and FBE coatings protected with plastic wrapping to prevent damage from steel strip contact during ocean transit
- Container loading plans optimized for 5.8m and 11.8m lengths to maximize payload while maintaining weight distribution
- Custom cutting to project-specified lengths available, with cut ends protected against corrosion during storage and transit
- Heat number and steel grade marked on each pipe with stenciled identification for on-site traceability verification
- FOB, CIF, and DDP shipping terms available with professional port coordination for 50+ country destinations
Initiating Your SSAW Pipe Procurement Process
Submit your project specifications including outer diameter, wall thickness, steel grade, quantity, coating requirements, and destination port to receive a detailed quotation within 12 hours. Our technical team will confirm standard availability or provide custom manufacturing options for non-standard dimensions, along with applicable mill test certificates and third-party inspection arrangements.
Request Your SSAW Pipe Quotation with Mill Test Certificates
Send your specifications via email or WhatsApp to receive pricing, delivery schedule, and documentation confirmation for your Carbon Steel SSAW Welded Steel Pipe Large Diameter Supplier requirements.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjysteel.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjysteel.com
Frequently Asked Questions
Q: What surface treatment options are available for SSAW pipes in corrosive environments?
A: We offer multiple coating systems including FBE for chemical resistance, 2PP/2PE for moderate corrosion protection, and 3PE/3PP for aggressive environments requiring both mechanical protection and corrosion resistance. The selection depends on soil conditions, operating temperature, and project design specifications.
Q: How do you ensure weld quality and provide material traceability?
A: Our in-house laboratory performs ultrasonic testing on the spiral weld seam at multiple positions, and each pipe is traceable to its heat number through the mill test certificate. X-ray inspection and radiography verify weld integrity before the pipe leaves the production line.
Q: What is the difference between theoretical weight and actual weight for invoicing?
A: Theoretical weight is calculated from nominal dimensions and standard density, while actual weight reflects measured dimensions within tolerance. We can invoice based on either method depending on your preference, with actual weight providing more accurate material cost allocation for your project.
Q: Can you provide custom lengths and end treatments for specific project requirements?
A: Yes, we offer custom cutting to lengths outside the standard 5.8m and 11.8m range, and end treatments including bevelled, plain, or grooved ends prepared to your welding procedure specifications. Processing services include welding, punching, cutting, and bending.
Q: What certifications and documentation are included for international shipments?
A: Each shipment includes original mill test certificates, CE certification under EN 10210/10219 where applicable, ISO 9001:2015 quality certificates, and complete customs documentation. Third-party inspection reports from SGS or BV are available upon request for destination country requirements.
Get Factory-Direct SSAW Pipe Pricing with Complete Documentation
Submit your project specifications to receive a quotation within 12 hours, including mill test certificates and third-party inspection options for your Carbon Steel SSAW Welded Steel Pipe Large Diameter Supplier requirements.
