Description
Factory-direct SSAW spiral welded steel pipe — every heat is verified in our in-house physical and chemical laboratory before release, with wall-thickness tolerance locked at ±1%.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q235B SSAW Spiral Welded Steel Pipe |
| Product Type | SSAW Spiral Welded Steel Pipe |
| Steel Grade | Q235, Q235B, Q345, S275, S275JR, A53, ST37 |
| Standard | GB |
| Section Shape | Round |
| Size Range | OD 273–3000 mm |
| Wall Thickness | 6–20 mm |
| Length | 5.8–12 m |
| Technique | SSAW / ERW / SAW |
| Surface Treatment | Hot Rolled / Painting / FBE / 2PE / 3PE / 3PP |
| Tolerance | ±1% |
| Ends | Plain end / Beveled end / Threaded and coupled / PVC covered and capped |
| Application | Piling / Heat-supply / Water and gas conveyance / API 5L pipeline / Chemistry / Electric power |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Piling foundations, bridge substructures, industrial pipe racks |
| Oil & Gas / Energy | API 5L petroleum and natural gas transmission, power plant circulating systems |
| Municipal Infrastructure | Drinking water supply networks, drainage trunk lines, district heat-supply pipelines |
| Construction | High-rise building foundation piling, port and wharf structural piles |
What Wall-Thickness Tolerance Costs on a Large-Diameter SSAW Order
Negative tolerance beyond ±1% means rejected piles and re-welded joints on site.
I once shipped a batch of spiral pipes to Southeast Asia where the wall thickness drifted below the lower limit. The client pulled out a caliper on the dock, measured three heats in a row, and rejected the entire container. Every pipe came back for rework. Since that day, every SSAW spiral welded steel pipe leaving our line passes through a calibrated ultrasonic thickness gauge before it is stamped for release. [NEED_CITE: ultrasonic thickness testing standards for welded steel pipe] When you are driving 3000 mm OD piles into marine clay, a wall that reads 5.8 mm instead of 6 mm is not a rounding error — it is a structural liability and a customs rejection waiting to happen.
Matching Large-Diameter SSAW Pipe to Piling and Pipeline Projects
An OD 273–3000 mm SSAW spiral welded steel pipe covers the full spectrum from municipal water mains to offshore piling. For driven piles in cohesive soil, Q345 grade delivers the higher yield strength needed to resist driving stresses without buckling. For buried pipelines in corrosive coastal or chemical-plant environments, a 3PE or FBE outer coating extends service life far beyond bare or painted steel. Beveled ends allow field welding to API-grade standards, while PVC-capped ends protect threaded connections during ocean transit.
Engineering Compliance and Certification Requirements
Large-diameter spiral welded pipes used in structural piling must conform to recognized engineering frameworks such as EN 1993 or AISC for load-bearing verification. [NEED_CITE: EN 1993 structural steel design requirements for hollow sections] Corrosion environment dictates coating selection: FBE suits temperatures up to 80 °C in inland pipelines, while 3PE and 3PP handle higher temperatures and mechanical damage in offshore or chemical settings. For EU projects, CE certification per EN 10219 is mandatory for customs clearance; for North American buyers, ASTM A53 or API 5L grade documentation is expected. Third-party inspection by SGS or BV before loading closes the traceability loop and prevents port-side holds.
Steel Grade Selection and SSAW Welding Process
Q235B remains the default choice for general structural and low-pressure fluid applications in China, offering adequate formability and weldability at competitive cost. Q345 steps up yield strength for piling and heavier structural roles. When the project specification calls for international grades, S275JR maps closely to Q235B in yield range, while A53 Grade B serves the North American pipeline and structural market. The SSAW process forms the plate into a helical seam, allowing continuous production of large diameters up to 3000 mm from relatively narrow plate — a cost advantage over seamless for non-critical pressure applications. [NEED_CITE: SSAW vs LSAW vs seamless steel pipe manufacturing comparison] Wall thickness from 6 to 20 mm covers most piling, water conveyance, and medium-pressure gas applications. Tolerance is held at ±1% through in-line ultrasonic monitoring at every stage of the spiral forming and submerged-arc welding pass.
Hidden Costs of Sourcing the Wrong Grade or Missing Certification
Ordering Q235B when the engineer specified S275JR means the mill test certificate will not match the purchase order — and the inspector will fail the shipment. Missing CE documentation on an EU-bound container means the cargo sits at the port while your project crane idles. Negative wall tolerance beyond ±1% triggers re-measurement at the client’s yard, potential rejection, and months of delay while replacement pipes are manufactured and shipped. [NEED_CITE: steel pipe customs clearance documentation requirements for EU and Middle East markets] These are not theoretical risks; they are the most common reasons large-diameter pipe orders fail acceptance at the destination.
Why Global Buyers Source SSAW Spiral Welded Steel Pipe from Us
Every coil is inspected upon arrival, and every finished pipe passes through our in-house physical and chemical laboratory — not a third-party lab we rent time at. We produce 2,800+ specifications across square, rectangular, round, and section steel, so when your piling contractor needs SSAW pipe and your structural team needs H-beams in the same shipment, one purchase order covers both. Our factory-direct model eliminates trading-company markups, and our professional loading team optimizes container stowage for large-diameter pipes to minimize freight cost per ton. We hold ISO 9001:2015, CE (EN 10210/10219), Singapore FPC, and SGS/BV verification, and we export to 50+ countries including the EU, North America, India, Southeast Asia, and the Middle East.
Documentation & Compliance
- Mill Test Certificate documenting Q235B / Q345 / S275JR chemical composition and mechanical properties per GB standard, traceable by heat number
- CE certificate per EN 10219 for structural hollow sections, required for EU customs clearance on piling and structural applications
- ISO 9001:2015 quality management system certificate covering the full SSAW production and inspection process
- SGS or BV third-party inspection report available upon request, covering dimensional, visual, and coating thickness verification before loading
- Material traceability report linking each pipe to its heat number, coil certificate, and welding parameters
- Complete customs document package: packing list, Bill of Lading, Certificate of Origin, and technical data sheets for SSAW spiral welded steel pipe
Packaging, Loading & Delivery
- SSAW spiral welded steel pipe bundled with steel strips and edge protectors, sized to match OD 273–3000 mm and length 5.8–12 m for stable ocean transit
- FBE / 3PE / 3PP coated pipes wrapped with protective film to prevent coating damage during handling and container loading
- Professional container loading plan optimized for large-diameter pipe nesting, maximizing payload per 40ft HC and reducing freight cost per ton
- Custom cutting to project-specific lengths within the 5.8–12 m range, with beveled or plain ends prepared per drawing
- Heat number and steel grade stenciled on each pipe end for on-site traceability and inspector verification
- FOB / CIF / DDP terms available with door-to-door logistics coordination to 50+ countries
Start Your SSAW Pipe Inquiry with Full Specifications
Submit your required OD, wall thickness, steel grade, coating type, quantity, and destination port — we respond within 12 hours with a detailed quotation, production lead time, and applicable certification list. For non-standard OD or wall combinations outside the 273–3000 mm / 6–20 mm range, we provide custom feasibility assessment and sampling before contract.
Request Your SSAW Spiral Welded Steel Pipe Quotation and Mill Test Certificate Today
Send your specifications by email to admin@sdxjysteel.com or contact us via WhatsApp at +86 188 5315 7756 to receive pricing, coating options, and third-party inspection arrangements for your next piling or pipeline project.
Frequently Asked Questions
Q: How do Q235B, S275JR, and A53 compare in terms of application suitability for SSAW spiral welded steel pipe?
A: Q235B is the standard Chinese structural and low-pressure fluid grade. S275JR is the European equivalent commonly specified for structural hollow sections under EN 10219. A53 Grade B is the North American standard for pipeline and structural applications. All three are available in our SSAW spiral welded steel pipe range with full mill test certificates.
Q: Can SGS or BV inspect the SSAW spiral welded steel pipe before loading?
A: Yes. Third-party inspection by SGS or BV is available upon request. The inspection covers dimensional verification, visual weld inspection, coating thickness measurement, and review of mill test certificates before the container is sealed.
Q: When should I choose FBE versus 3PE versus 3PP coating for my SSAW spiral welded steel pipe?
A: FBE is suitable for inland pipelines operating at moderate temperatures. 3PE provides superior mechanical protection and moisture resistance for buried or submerged pipelines. 3PP handles higher operating temperatures and is preferred for hot fluid transport or harsh chemical environments. We can advise on the optimal coating based on your specific service conditions.
Q: Can you produce SSAW spiral welded steel pipe in non-standard OD or wall thickness combinations?
A: Yes. Beyond the standard 273–3000 mm OD and 6–20 mm wall thickness range, we can evaluate custom non-standard specifications. Send your drawing or requirement list and we will confirm feasibility, lead time, and MOQ.
Q: Do you offer FOB, CIF, and DDP shipping terms for large-diameter SSAW pipe?
A: Yes. We provide FOB, CIF, and DDP terms with professional container loading optimization for large-diameter pipes. Our logistics team coordinates port handling, stowage planning, and door-to-door delivery to 50+ countries including the EU, North America, Southeast Asia, and the Middle East.
