Description
Vertically Integrated SSAW Pipe Mill — Raw steel production and spiral welding under one roof in Jinan, delivering API 5L and ASTM A252 certified large diameter pipes with full heat traceability.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | API 5L / ASTM A252 / EN1029 Spiral Submerged Arc Welded (SSAW) Steel Pipe |
| Product Type | Spiral Submerged Arc Welded (SSAW) Steel Pipe / Round Steel Pipe |
| Steel Grade | API 5L, X42, X60, ASTM A252, EN1029 |
| Standard | API 5L, ASTM A252, EN1029, EN, BS, JIS |
| Section Shape | Round |
| Size Range | Large Diameter (customizable) |
| Wall Thickness | 9–500 mm |
| Length | 6 m / 12 m / Customized |
| Technique | SSAW (Spiral Submerged Arc Welded) |
| Surface Treatment | Galvanized / 3LPP / 3LPE / FBE / Customized |
| Tolerance | Within ±1% – ±20% (varies by parameter) |
| Ends | Plain / Beveled (customizable) |
| Material | Carbon Steel (Non-Alloy) |
| Oiled or Non-oiled | Non-oiled |
| Application | Gas pipeline / Oil pipeline / Drill pipe / Boiler pipe / Hydraulic pipe / Fluid transport / Structural pipe / Fertilizer special pipe |
| MOQ | Varies by product specification (consult for details) |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas EPC | Onshore and offshore transmission pipelines, gathering lines, cross-country crude oil and natural gas transport |
| Infrastructure & Piling | Bridge foundation piles, port jetty structures, retaining wall columns, deep foundation support systems |
| Industrial Plant Construction | Hydraulic conveyance systems, boiler feed lines, fertilizer plant process piping, cooling water circuits |
| Municipal Engineering | Water supply trunk mains, sewage discharge pipelines, stormwater drainage systems |
Where Material Traceability Gaps Cause Pipeline Rejection
A missing heat number on a mill test certificate can halt an entire pipeline commissioning.
When EPC firms source large diameter SSAW spiral welded steel pipe from fabricators who buy raw plates from third-party mills, the certification chain breaks. Welding procedure qualifications reference base metal chemistry that nobody can verify. Third-party inspectors flag undocumented material substitutions. The pipeline operator refuses to accept the line, and the contractor faces weeks of delay while retrospective testing is arranged. [NEED_CITE: API 5L material traceability requirements for pipeline steel]
We control the entire chain — from our own rolling lines producing the steel plate to the spiral welding, coating, and final inspection of the SSAW spiral welded steel pipe. Every heat number on the MTC corresponds to a plate we rolled, a weld we made, and a coating we applied.
Matching Wall Thickness and Coating to Buried Pipeline Environments
Selecting the correct SSAW spiral welded steel pipe for oil and gas transmission requires aligning wall thickness with operating pressure and matching the anti-corrosion coating to the burial environment. API 5L X42 and X60 grades serve high-pressure transmission lines where yield strength directly determines the maximum allowable working pressure. For buried service in aggressive soil conditions, 3LPE coating provides mechanical protection during backfilling while the FBE primer ensures adhesion to the steel surface. In high-temperature service above 80°C, 3LPP coating replaces 3LPE to maintain coating integrity. Our engineering team reviews the project specification against the actual service conditions to confirm the coating system selection before production begins.
Engineering Compliance and Certification for Global Projects
Large diameter SSAW pipes for infrastructure and energy projects must satisfy multiple compliance layers simultaneously. Structural piling applications require ASTM A252 or EN1029 conformity, with dimensional tolerances verified against the relevant standard before the pipe leaves the mill. Oil and gas transmission lines demand API 5L certification with full documentation packages including WPS, PQR, and NDT reports. [NEED_CITE: EN 10219 structural hollow section dimensional tolerance requirements] European buyers require CE marking under EN standards for customs clearance, while Middle East projects often mandate GOST or client-specific approval. Our quality department prepares the complete documentation package — MTC with heat traceability, third-party inspection reports from SGS or BV, and export certificates — so that the SSAW spiral welded steel pipe clears customs without delay.
Understanding SSAW Welding and Steel Grade Selection
The spiral submerged arc welding process forms the pipe by helically winding steel plate and welding both the inner and outer seams simultaneously under a flux blanket. This method produces a continuous weld seam suitable for large diameter pipes where seamless or LSAW alternatives become economically impractical. API 5L X42 offers moderate yield strength suitable for medium-pressure gas distribution, while X60 serves higher-pressure transmission lines requiring greater hoop stress resistance. ASTM A252 Grade 2 and Grade 3 serve piling applications where the primary requirement is structural load-bearing capacity rather than internal pressure containment. EN1029 covers structural round tubes for general construction. The choice between these grades depends on whether the pipe will carry pressurized fluid, support structural loads, or serve both functions simultaneously.
Hidden Costs of Unverified Steel Grade Substitution
Specifying API 5L X60 and receiving X42 without documentation changes the entire pressure rating calculation. The pipeline designer sized the wall thickness for X60 yield strength; substituting a lower grade without engineering review means the pipe operates above its allowable stress. Third-party inspection during hydrostatic testing reveals the discrepancy, and the entire batch faces rejection or costly downgrading. [NEED_CITE: consequences of steel grade substitution in pressure pipeline applications] Beyond the immediate material cost, the project faces schedule delays, redesign expenses, and potential liability if the substituted pipe enters service undetected.
Why Project Teams Source SSAW Pipe from Our Jinan Facility
Our vertically integrated operation eliminates the material traceability gap that causes most pipeline project delays. The same facility that rolls the steel plate welds it into the SSAW spiral welded steel pipe, applies the anti-corrosion coating, and prepares the export documentation. Our in-house laboratory performs chemical analysis, mechanical testing, and non-destructive examination per API 5L and ASTM requirements. We maintain 2,800+ specifications of raw material inventory, allowing rapid response to urgent project requirements without waiting for third-party plate delivery. Every pipe carries a unique heat number linking it to the raw material certification. Third-party inspectors from SGS, BV, or client-nominated surveyors operate regularly at our facility. Professional loading teams handle oversized cargo with specialized lashing for ocean transit.
Documentation & Compliance
- Mill Test Certificate documenting API 5L X42/X60 chemical composition, yield strength, and tensile properties per heat number
- API 5L certification with product specification level (PSL-1 or PSL-2) clearly identified
- CE certificate for EN1029 structural pipe shipments to European Union markets
- SGS or BV third-party inspection report covering dimensional verification, weld seam NDT, and coating thickness measurement
- Material traceability report linking each pipe to raw plate heat number and rolling schedule
- Complete customs documentation including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Large diameter SSAW pipes bundled with steel strip bands and edge protectors to prevent coating damage during handling and ocean transit
- 3LPE/3LPP/FBE coated pipes wrapped with protective film at pipe ends to preserve the anti-corrosion layer during storage and transportation
- Custom-length pipes (6 m / 12 m / cut-to-order) loaded with optimized container stowage plans maximizing payload per 40ft open-top or flat-rack container
- Pipe ends protected with plastic caps (beveled or plain ends as specified) to prevent moisture ingress and edge damage
- Heat number and steel grade stenciled on each pipe exterior for site identification and traceability verification
- FOB Jinan/Qingdao, CIF, or DDP delivery with complete export documentation and container tracking until site arrival
Requesting a Quotation for Your SSAW Pipe Requirement
Submit your project drawings, steel grade specification, wall thickness, coating requirement, and destination port to receive a detailed quotation including material cost, fabrication, coating, packing, and shipping. Our engineering team reviews the specification within 24 hours and confirms compliance with API 5L, ASTM A252, or EN1029 standards before production begins.
Start Your SSAW Pipe Inquiry
Send your specification package to receive pricing, mill test certificate samples, and production lead time confirmation.
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 API 5L X42 and X60 for pipeline applications?
A: API 5L X42 and X60 differ primarily in minimum yield strength, with X60 offering higher strength suitable for higher-pressure transmission lines. The selection depends on the design pressure, wall thickness calculation, and operating conditions specified by the pipeline engineer. Both grades are available as SSAW spiral welded steel pipe with full API 5L certification and mill test documentation.
Q: Can you arrange third-party inspection before shipment?
A: Yes, we regularly host inspections from SGS, BV, and client-nominated surveyor companies at our Jinan facility. The inspection covers dimensional verification, visual weld examination, non-destructive testing (UT, PT), coating thickness measurement, and review of the mill test certificate package. Inspection scheduling is coordinated with the production timeline to avoid shipment delays.
Q: Which anti-corrosion coating is suitable for buried pipeline service?
A: For buried pipelines, 3LPE (three-layer polyethylene) is the standard choice, providing mechanical protection during backfilling combined with FBE primer for corrosion resistance. For high-temperature buried service above 80°C, 3LPP (three-layer polypropylene) replaces 3LPE. The coating selection depends on soil conditions, operating temperature, and project specification requirements.
Q: What documentation is provided with each shipment?
A: Each shipment includes a mill test certificate with heat number traceability, API 5L or ASTM A252 product certification, dimensional inspection report, coating thickness measurement record, NDT report for weld seams, packing list, bill of lading, and certificate of origin. Additional client-specific documentation can be prepared upon request.
Q: Do you offer custom lengths and end preparations?
A: Yes, we supply SSAW spiral welded steel pipe in standard lengths of 6 m and 12 m, as well as cut-to-order lengths per project requirements. End preparations include plain ends, beveled ends for welding, or custom configurations. MOQ for custom specifications varies and should be confirmed during the quotation stage.
