Description
Factory-Direct SSAW Pipe — every batch ships with original mill certificates and passes SGS/BV inspection on request.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SSAW Spiral Welded Steel Pipe |
| Product Type | Spiral Welded Steel Pipe (SSAW) |
| Steel Grade | Q235B, Q345B, Gr.A, Gr.B, Q195, Q215, Q235, Q345, 10#, 20# |
| Standard | API 5L, ASTM A252, GB, BS, EN, AISI, DIN, JIS |
| Section Shape | Round |
| Outer Diameter | 159–3200 mm |
| Wall Thickness | 0.3–16 mm |
| Length | 5.8–11.8 m (or as required) |
| Technique | SSAW (Spiral Submerged Arc Welded) |
| Surface Treatment | External: 3PE / FBE / 2PE / 3PP; Internal: FBE |
| External Coating Standard | DIN30670 (3PE), SY/T0315 (Single-layer FBE) |
| Internal Coating Standard | SY/T0442 (FBE) |
| Tolerance | ±1% |
| Ends | Plain end / Beveled end / Threaded and coupled (PVC caps) |
| Application | Oil & gas pipeline / Piling project / Heat-supply project / Water & gas drainage / Chemical industry / Electric power engineering / Mine slurry transport |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas Transmission | Long-distance crude oil and natural gas pipelines, gathering lines, distribution networks |
| Infrastructure & Piling | Bridge foundation piling, port quay wall structures, highway sound barrier posts |
| Municipal Engineering | Urban heat-supply network, water supply trunk lines, stormwater and sewage drainage |
| Industrial Plant | Chemical fluid transport, cooling water circulation, mine slurry discharge pipelines |
| Power Engineering | Power plant cooling water intake, boiler feed water lines, ash handling systems |
What Wall-Thickness Tolerance Costs on a Large-Diameter SSAW Spiral Welded Steel Pipe Order
A ±1% tolerance on a 3200 mm OD pipe means every millimeter of deviation multiplies across the entire spiral seam length.
Early in my career I handled a Middle East oil pipeline order — 325×8 SSAW pipe, wall thickness negative tolerance ran to 1.2 mm. The client’s third-party inspector rejected the entire lot at the destination port. We re-measured every joint on-site before reshipment. Since then I check wall thickness with a micrometer before anything leaves the warehouse, and those readings travel with the cargo. For a SSAW spiral welded steel pipe supplier, controlling tolerance is not a marketing claim — it is the difference between a project that passes acceptance and one that gets held at customs. [NEED_CITE: API 5L dimensional tolerance requirements for spiral welded pipe]
How OD 159–3200 mm Range Covers Pipeline and Piling Engineering
Large-diameter SSAW spiral welded steel pipe from 159 mm to 3200 mm OD bridges two distinct engineering worlds: pressurized fluid transmission and structural piling. The spiral submerged arc welding process allows continuous production of diameters that would be impractical with longitudinal seam methods, while the helical weld geometry distributes stress more evenly under external soil loads — critical for piling applications where the pipe must withstand driving forces and lateral earth pressure simultaneously. Our three production lines run simultaneously to handle mixed-diameter orders, so a single shipment can include 1420 mm pipeline sections and 610 mm piling sections in one consolidated container load.
Engineering Compliance Across API 5L, ASTM A252, and EN Standards
When a project specification calls for API 5L, the pipe must meet chemical composition limits and mechanical property ranges defined for each grade — Q235B maps roughly to API Gr.A territory, while Q345B aligns with Gr.B in terms of minimum yield behavior. For piling projects referencing ASTM A252, the focus shifts to weld integrity and dimensional accuracy rather than pressure containment. Anti-corrosion coating selection follows the service environment: 3PE per DIN30670 handles aggressive soil conditions with moisture and chemical exposure, while single-layer FBE per SY/T0315 suits moderate environments where cost efficiency matters. Internal FBE coating per SY/T0442 at 250–350 μm thickness protects against fluid corrosion in water and slurry transport applications. [NEED_CITE: API 5L vs ASTM A252 scope and application differences]
Steel Grade Selection and SSAW Process Fundamentals
The Q-series grades (Q195 through Q345) follow the Chinese GB standard system where the number indicates minimum yield strength in MPa — Q235B delivers adequate performance for water drainage and general structural piling, while Q345B provides higher load-bearing capacity for deep foundation work and heavy-wall pipeline sections. API Gr.A and Gr.B serve international oil and gas projects where traceability to heat number and compliance with API 5L manufacturing requirements are contractually mandatory. The SSAW process itself forms the pipe from steel coil through continuous spiral forming and submerged arc welding from both inside and outside, producing a helical seam that is inherently longer than a straight longitudinal weld but distributes residual stress across the spiral angle — this geometry is why SSAW pipe can achieve large diameters up to 3200 mm without the plate-width limitations that constrain JCOE or UOE methods. Surface treatment options — 3PE, FBE, 2PE, 3PP — address different corrosion environments: 3PE’s three-layer structure (epoxy primer, adhesive copolymer, polyethylene outer) provides mechanical protection plus chemical resistance for buried pipelines, while FBE’s fusion-bonded epoxy offers excellent adhesion and cathodic disbondment resistance for coated pipe operating under CP systems.
Hidden Costs of Specifying the Wrong Grade or Accepting Unverified Tolerance
Ordering Q235B when the project engineer specified Q345B means the pipe may pass visual inspection but fail structural load calculations during final acceptance — the cost is not the price difference between grades, but the expense of pulling and replacing installed pipe. Similarly, accepting wall thickness beyond ±1% tolerance on a 16 mm wall pipe might save a few dollars per ton at purchase, but if the actual minimum falls below the design corrosion allowance, the pipeline’s service life shrinks and the operator faces premature integrity management costs. Missing or incomplete mill test certificates create customs clearance delays at destination ports, where inspectors cannot verify chemical composition without traceable documentation tied to heat numbers. [NEED_CITE: consequences of non-compliant steel grade substitution in pipeline projects]
Why Project Buyers Source SSAW Spiral Welded Steel Pipe from Xin Jiyuan
We operate three SSAW production lines running simultaneously, producing over 20,000 tons monthly across the full 159–3200 mm diameter range — this capacity means your order does not wait behind another client’s project. Every batch leaves our facility with an original mill test certificate documenting chemical composition and mechanical properties, traceable to the specific heat number from the steel coil. Our in-house laboratory conducts three-stage inspection from raw material incoming through in-process weld monitoring to final dimensional and coating verification. For clients requiring independent confirmation, we coordinate SGS or BV third-party inspection before shipment at no additional coordination fee. We handle export documentation, customs paperwork, and container loading optimization — when you order 11.8 m lengths of 1420 mm OD pipe, our loading team calculates the exact nesting arrangement to maximize container utilization and reduce your freight cost per meter. Volume discount programs apply for long-term partners with recurring procurement needs, and we accommodate split shipments against blanket orders to match your project’s phased delivery schedule.
Documentation & Compliance
- Mill test certificate documenting Q235B/Q345B chemical composition and mechanical properties per GB/T 9711, traceable to heat number from steel coil
- API 5L product certification for Gr.A and Gr.B pipe intended for oil and gas transmission service
- ISO 9001:2015 quality management system certificate covering the full SSAW manufacturing process
- SGS or BV third-party inspection report available on request, covering dimensional check, weld seam NDT, and coating thickness measurement
- Coating compliance report confirming 3PE application per DIN30670 or FBE application per SY/T0315/SY/T0442 with thickness readings
- Full customs documentation package including packing list, bill of lading, and certificate of origin for destination port clearance
Packaging, Loading & Delivery
- SSAW spiral welded steel pipe bundled with steel strip bands and edge protectors to prevent coating damage during handling and ocean transit
- External 3PE or FBE coated surfaces wrapped with protective film at pipe ends and contact points to preserve coating integrity
- Container loading optimized for 5.8 m and 11.8 m lengths with nested arrangement for large-diameter pipe (1420 mm and above) to maximize cubic utilization
- Plain end, beveled end, or threaded and coupled ends fitted with PVC caps to protect thread integrity and prevent moisture ingress during storage
- Heat number and steel grade stenciled on each pipe end for on-site traceability and inspection verification
- FOB, CIF, and DDP shipping terms available with professional export team handling port coordination and door-to-door logistics
Start Your SSAW Pipe Procurement with Verified Documentation
Submit your project specifications — outer diameter, wall thickness, steel grade, coating requirement, quantity, and destination port — and receive a competitive bulk quotation within 12 hours, complete with mill test certificate samples and coating compliance documentation. For non-standard dimensions or custom coating combinations, our technical team provides alternative proposals matching your engineering requirements and budget constraints.
Request Your SSAW Spiral Welded Steel Pipe Quotation
Send your specifications via email or WhatsApp to receive factory-direct pricing, mill test certificate samples, and container loading optimization for your project.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Email: admin@sdxinjiyuan.com
Mobile/WhatsApp: +86 188 5315 7756
