Description
Factory-Direct SSAW Spiral Welded Steel Pipe Supply — Large-diameter spiral pipes up to OD 1000mm produced in-house with full EN10219 and ASTM A572 compliance, shipped with original mill test certificates.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SSAW Spiral Submerged Arc Welded Steel Pipe |
| Product Type | Round Steel Pipe / Circular Hollow Section |
| Steel Grade | S355JR, ASTM A572 Grade 50, Q355B, Q355D |
| Standard | EN10219, ASTM A572 |
| Section Shape | Round |
| Outer Diameter | OD 1000mm |
| Wall Thickness | 10–30mm |
| Length | 12m |
| Technique | SSAW (Spiral Submerged Arc Welded) |
| Surface Treatment | Cold Rolled |
| Tolerance | ±10% |
| Ends | Plain |
| Application | Fluid transport, Oil pipelines, Gas pipelines, Structural applications |
| Processing Service | Welding, Punching, Cutting |
| Invoicing | By Theoretical Weight |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas Infrastructure | Long-distance crude oil and natural gas transmission pipelines, pipeline crossing supports |
| Municipal Engineering | Urban water supply trunk lines, drainage and sewage discharge systems |
| Industrial Construction | Heavy-load structural columns, equipment support frames, platform foundations |
| Hydraulic Engineering | Water diversion pipelines, pump station intake and discharge systems |
What Wall-Thickness Tolerance Costs on a Large-Diameter SSAW Spiral Welded Steel Pipe Order
A few tenths of a millimeter off-spec wall thickness on a 1000mm OD pipe can trigger third-party inspection rejection at the destination port.
When procurement teams source large-diameter SSAW pipes for pressurized fluid transport or structural applications, inconsistent wall thickness is the most frequent quality dispute we see. A batch may pass the supplier’s internal check but fail independent SGS or BV verification at the discharge port, leaving an entire container stuck in customs. Missing or incomplete mill test certificates compound the problem — without heat-number traceability, the cargo cannot clear inspection and the project timeline collapses. [NEED_CITE: EN 10219 tolerance requirements for cold-formed and welded hollow sections]
Matching OD 1000mm SSAW Spiral Welded Steel Pipe to High-Pressure Pipeline Infrastructure
Large-diameter spiral welded pipes in S355JR and ASTM A572 Grade 50 serve projects where fluid volume and structural load demand continuous weld integrity across the full pipe length. The SSAW process produces a helical weld seam that distributes stress more evenly than a straight seam, making it suitable for oil and gas transmission lines operating under sustained internal pressure. Our factory runs dedicated spiral welding lines for diameters up to 1000mm with wall thickness from 10mm to 30mm, and every heat is documented with chemical composition and mechanical test data traceable back to the raw coil.
Engineering Compliance and Certification Requirements for SSAW Pipeline Steel
Projects specifying EN10219 for European markets or ASTM A572 for North American destinations require matching mill certificates and recognized third-party inspection before shipment. The CE marking under EN 10219 is often mandatory for customs clearance in EU member states, while ASTM A572 Grade 50 compliance must be verifiable through original test reports rather than supplier declarations alone. [NEED_CITE: CE marking requirements for structural steel hollow sections under EN 10219] Wall thickness tolerance of ±10% on a 15.875mm nominal wall means the acceptable range spans roughly 14.3mm to 17.5mm — any reading outside this band constitutes a non-conformance under standard inspection protocols. Plain ends on 12m lengths are prepared for on-site beveling and girth welding per the project’s welding procedure specification.
Steel Grade Selection and SSAW Welding Process Fundamentals
The S355JR grade provides a higher minimum yield strength than S235, making it the preferred choice for structural frames and load-bearing pipeline supports where deflection limits are tight. ASTM A572 Grade 50 serves a similar role in the American standard system, with equivalent performance characteristics for heavy structural and bridge applications. The Q355B and Q355D grades from the Chinese standard system offer comparable strength levels, with Q355D adding low-temperature impact toughness requirements for cold-climate installations. [NEED_CITE: steel grade equivalence between EN S355JR and ASTM A572 Grade 50]
The SSAW spiral submerged arc welding process forms the pipe from a continuously fed steel coil, with the weld seam spiraling along the pipe body at a controlled helix angle. This method allows production of large diameters — up to and beyond 1000mm — from narrower coil stock, reducing material cost compared to seamless or LSAW alternatives at equivalent diameters. The submerged arc process shields the weld pool under a granular flux layer, producing deep penetration and consistent weld quality suitable for high-pressure service. Cold rolled surface treatment provides a smoother finish that facilitates coating adhesion for downstream corrosion protection systems.
Hidden Costs of Procuring SSAW Spiral Welded Steel Pipe Without Verified Documentation
Accepting a lower unit price from a supplier who cannot provide original mill test certificates creates downstream risk that far exceeds the initial saving. Pipes with wall thickness below the specified tolerance reduce the pressure rating of the installed pipeline and may fail hydrostatic testing at the construction site. [NEED_CITE: consequences of substandard wall thickness in pressure pipeline applications] Material without proper heat-number traceability cannot be verified against the specified steel grade, creating liability exposure if structural failure occurs. Customs authorities in multiple destination markets now require CE or equivalent certification documentation before releasing steel pipe shipments — missing paperwork means demurrage charges, re-export costs, or outright cargo seizure.
Why Project Buyers Source SSAW Spiral Welded Steel Pipe From Our Factory
Our production facility operates dedicated spiral welding lines capable of producing large-diameter pipes from 610mm up to 1000mm OD with wall thickness ranging from 10mm to 30mm, giving project buyers a single source for both standard and non-standard diameter requirements. Every production heat undergoes three-stage internal inspection covering chemical composition, tensile properties, and weld seam integrity before release, with results documented on original mill test certificates that travel with the cargo. We hold CE certification under EN 10219 and ISO 9001:2015 quality management registration, and we arrange SGS or BV third-party inspection at the buyer’s request before container loading. Our inventory covers over 2800 specifications across multiple product categories, allowing consolidated container loading when a project requires both large-diameter SSAW pipe and structural sections in the same shipment. Factory-direct pricing with volume-based discount programs applies to recurring orders, and our export team handles container loading optimization for 12m lengths to maximize payload per shipment.
Documentation & Compliance
- Mill test certificate documenting S355JR or ASTM A572 Grade 50 chemical composition and mechanical properties per EN10219, traceable to individual heat numbers
- CE certificate confirming EN 10219 compliance for structural hollow sections, required for customs clearance in European Union member states
- ISO 9001:2015 quality management system certificate covering the full production and inspection process for SSAW spiral welded pipes
- SGS or BV third-party inspection report available upon request, covering wall thickness verification, visual weld examination, and dimensional checks before shipment
- Material traceability documentation linking each pipe to its heat number, coil origin, and production date for full supply chain transparency
- Export customs documents including packing list, bill of lading, and certificate of origin formatted to destination country requirements
Packaging, Loading & Delivery
- 12m length SSAW pipes bundled with steel strip bands at regular intervals, with end protectors to prevent plain-end damage during handling and ocean transit
- Cold rolled surface pipes coated with anti-rust oil before bundling to prevent oxidation during storage and shipping in humid climates
- Container loading plans optimized for OD 1000mm pipes, calculating nested or side-by-side arrangements to maximize payload within standard 40ft open-top or flat-rack containers
- Heat number and steel grade markings stenciled on each pipe exterior for on-site identification and traceability verification during installation
- FOB, CIF, and DDP delivery terms available with professional export documentation handling and real-time shipment tracking from the loading port to destination
Getting Your SSAW Spiral Welded Steel Pipe Quote Started
Submit your required outer diameter, wall thickness, steel grade, total quantity, and destination port to receive a competitive bulk quotation with volume pricing and estimated production lead time. We will include sample mill test certificate format and CE documentation confirmation in the initial response so your engineering and procurement teams can verify compliance before placing the order.
Request Your SSAW Pipe Quotation and Mill Test Certificate
Send your specifications, steel grade, quantity, and destination port to receive factory-direct pricing with full documentation.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxinjiyuan.com
Mobile / WhatsApp / WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
Frequently Asked Questions
Q: What is the difference between SSAW and LSAW for large-diameter pipe applications?
A: SSAW spiral welded pipe is formed from steel coil with a helical weld seam, allowing production of large diameters from narrower coil stock at lower cost. LSAW uses a straight longitudinal seam and is typically preferred for very thick walls or specific structural applications. The choice depends on diameter, wall thickness, pressure rating, and project specification requirements.
Q: Can you provide steel grade equivalence documentation between S355JR and ASTM A572 Grade 50?
A: We supply SSAW pipes in S355JR, ASTM A572 Grade 50, Q355B, and Q355D, and our mill test certificates document the actual chemical composition and mechanical test results for each heat. Your engineering team can verify equivalence against the project specification using the certified test data.
Q: What wall thickness tolerance applies to OD 1000mm SSAW pipes?
A: Standard tolerance for SSAW spiral welded pipe is ±10% of the nominal wall thickness. For a 15.875mm nominal wall, this means the acceptable range is approximately 14.3mm to 17.5mm. Third-party inspection reports from SGS or BV confirm compliance before shipment.
Q: Is third-party inspection available before shipment?
A: Yes, we arrange SGS or BV third-party inspection at the buyer’s request. The inspection covers wall thickness measurement, visual weld seam examination, dimensional verification, and review of mill test certificates. Inspection is conducted before container loading and the report is included in the shipping documentation package.
Q: How do you optimize container loading for 12m long OD 1000mm pipes?
A: Our export team calculates the optimal loading arrangement based on pipe outer diameter and container type. For OD 1000mm pipes in 12m lengths, we typically use 40ft open-top or flat-rack containers and prepare detailed loading plans to maximize payload while ensuring secure lashing for ocean transit.
