Description
One-Source SSAW Pipe Supply — S355JR and ASTM A572 Grade 50 spiral welded pipes produced from our own steel mill coils through to finished OD 1000mm sections, with full heat-number traceability and EN 10219 compliance documentation included in every shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355JR / ASTM A572 Grade 50 SSAW Round Steel Pipe |
| Product Type | SSAW Round Steel Pipe (Spiral Submerged Arc Welded) |
| Steel Grade | S355JR, ASTM A572 Grade 50, Q355B, Q355D |
| Standard | EN 10219, ASTM A572, API |
| Section Shape | Round |
| Size Range | OD 610mm – OD 1000mm |
| Wall Thickness | 10mm – 30mm |
| Length | 12m |
| Technique | SSAW (Spiral Submerged Arc Welded) |
| Surface Treatment | Cold Rolled / Non-oiled |
| Tolerance | ±10% |
| Ends | Plain / Beveled (per request) |
| Application | Fluid transport, gas pipeline, oil pipeline, structural piling |
| Invoicing | By Theoretical Weight |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas EPC | Onshore and offshore transmission pipelines, gathering lines, slug catchers |
| Industrial Construction | Process piping for chemical plants, hydraulic conveyance systems, cooling water mains |
| Infrastructure & Civil | Bridge foundation piling, retaining wall columns, highway sign gantry supports |
| Power & Energy | Wind turbine foundation anchor cages, boiler support columns, flue gas ducting |
What Negative Tolerance Really Costs on a Pipeline Order
A wall-thickness deviation beyond ±10% triggers third-party inspection rejection and forces full-batch re-measurement at the destination port.
I spent years in the QC lab before moving to trade. One batch of OD 630 SSAW pipes heading to the Middle East arrived with wall thickness readings consistently 1.2mm below the nominal value. The client’s SGS inspector flagged every single joint. The entire container was pulled back to our warehouse for re-inspection and compensation. Since then, I personally verify measured thickness data against the mill certificate before any SSAW spiral welded steel pipe supplier OD1000 shipment leaves Jinan. [NEED_CITE: EN 10219 dimensional tolerance requirements for cold-formed hollow sections]
How Large-Diameter SSAW Pipe Meets Heavy-Duty Pipeline Demands
OD 610–1000mm SSAW spiral welded steel pipe supplier OD1000 sections in S355JR and ASTM A572 Grade 50 carry the yield strength needed for high-pressure fluid and gas transmission while the spiral weld geometry distributes hoop stress more evenly than straight-seam alternatives. Our vertically integrated mill produces the raw coil, controls the chemical composition at the ladle stage, and feeds it directly into the SSAW line — so the heat number on the pipe matches the original melt record with no third-party material gap.
Engineering Compliance Across EU, US, and Middle East Specifications
S355JR satisfies EN 10219 for European structural and pipeline projects, while ASTM A572 Grade 50 covers North American EPC specifications — both available from the same production run with separate test certificates. Q355B and Q355D add low-temperature impact toughness for projects in cold-climate regions. CE marking under EN 10219 is mandatory for EU customs clearance, and API certification validates the pipe for pressurized hydrocarbon service. [NEED_CITE: steel grade equivalence between EN 10219 S355JR and ASTM A572 Grade 50]
Understanding SSAW Process and Steel Grade Selection
Spiral Submerged Arc Welding forms the pipe from a continuously fed steel coil at a helical angle, allowing a single mill to produce multiple diameters from the same coil width — this is why OD 610–1000mm SSAW spiral welded steel pipe supplier OD1000 sections cost less per tonne than equivalent LSAW pipes while maintaining full penetration weld integrity. S355JR delivers a higher minimum yield strength than S235JR, making it the default choice for load-bearing structural and pipeline applications where wall thickness optimization matters. Q355D adds Charpy impact testing at sub-zero temperatures, essential for Arctic or high-altitude pipeline routes. The ±10% wall thickness tolerance means a nominal 15.875mm pipe can measure between 14.3mm and 17.5mm — invoicing by theoretical weight based on nominal dimensions, so buyers should confirm whether their project specification requires minimum guaranteed thickness or permits standard mill tolerance. [NEED_CITE: SSAW versus LSAW weld integrity comparison for large-diameter pipe]
Hidden Costs of Sourcing SSAW Pipe Without Verified Documentation
Pipes supplied without traceable heat numbers or with wall thickness outside the declared tolerance create cascading costs: customs holds due to missing CE certificates, third-party inspection rejections at the destination port, and in the worst case, structural safety concerns if the as-delivered yield strength does not match the design assumption. A mill test certificate that lists only “conforms to S355JR” without actual chemical composition and mechanical test values provides no legal protection during project handover. [NEED_CITE: EN 10204 3.1 versus 3.2 inspection certificate requirements]
Why Procure SSAW Pipe Directly from an Integrated Mill-Fabricator
Our own steel production facility operates three rolling lines and stocks over 2,800 raw material specifications, meaning the coil that becomes your SSAW spiral welded steel pipe supplier OD1000 pipe was melted, rolled, and welded under one quality management system. Every shipment includes weld maps, NDT reports, dimensional inspection records, and coating certificates — not just a generic mill test certificate. We supply certified welders working to approved WPS/PQR procedures under AWS and EN standards, and our engineering team reviews shop drawings before production begins to catch dimensional conflicts early. Professional loading plans handle the 12m length and OD up to 1000mm diameter for both standard container and breakbulk shipments.
Documentation & Compliance
- Mill Test Certificate documenting S355JR or ASTM A572 Grade 50 chemical composition and mechanical properties per EN 10204 3.1, with heat number traceability from coil to finished pipe
- CE Certificate of Conformity under EN 10219 for EU market access and customs clearance on structural and pipeline applications
- ISO 9001 Quality Management System certificate covering the entire production chain from raw material procurement through SSAW welding and final inspection
- SGS or BV third-party inspection report available at any production hold point, covering dimensional checks, weld NDT, and coating thickness verification
- Material Traceability Report linking each pipe’s heat number to the original ladle analysis and rolling schedule
- Full customs documentation package including packing list, bill of lading, certificate of origin, and commercial invoice aligned with destination country requirements
Packaging, Loading & Delivery
- OD 610–1000mm SSAW pipes bundled with steel strip bands and edge protectors to prevent coating damage and ovality deformation during ocean transit
- Non-oiled cold-rolled surface preserved with end caps and moisture-resistant wrapping to prevent corrosion on the 12m length during extended shipping
- 12m standard length loaded into 40ft open-top containers or flat racks with custom cradle supports for OD 1000mm sections to maintain roundness
- Heat number and steel grade stenciled on each pipe end for on-site identification and traceability verification during installation
- Beveled or plain ends protected with plastic caps to prevent damage to the weld preparation geometry during handling
- FOB, CIF, and DDP shipping terms available with professional oversized cargo loading plans for SSAW spiral welded steel pipe supplier OD1000 sections
Getting Your SSAW Pipe Quote Started
Send your project drawings or specification sheet listing the required steel grade (S355JR, ASTM A572 Grade 50, Q355B, or Q355D), outer diameter, wall thickness, quantity, and destination port. We respond within 24 hours with a detailed quotation covering material, fabrication, coating, packing, and shipping costs, along with the shop drawing timeline and production schedule.
Request Your SSAW Pipe Quotation and Mill Test Certificate
Submit your pipe dimensions, steel grade, and quantity to receive a detailed offer with full material documentation.
Mobile/WhatsApp/WeChat: +86 188 5315 7756 | Email: admin@xjystructure.com
Frequently Asked Questions
Q: What is the difference between S355JR and ASTM A572 Grade 50 for SSAW pipe projects?
A: Both grades deliver comparable minimum yield strength for structural and pipeline applications. S355JR is specified under EN 10219 for European projects, while ASTM A572 Grade 50 is the standard for North American EPC specifications. We produce both from the same SSAW line and issue separate test certificates for each standard.
Q: How does XJY Structure ensure material traceability from coil to finished pipe?
A: Our own steel mill produces the raw coil, so every SSAW spiral welded steel pipe supplier OD1000 section carries a heat number that traces directly back to the original ladle analysis. The mill test certificate includes chemical composition, mechanical test results, and the complete production chain record.
Q: Can you supply beveled ends, painting, or 3PE coating for pipeline applications?
A: Yes. We provide beveled ends per your welding procedure specification, external painting in any RAL color, and 3PE anti-corrosion coating for buried or offshore pipeline service. All coating thickness and adhesion test results are included in the QC documentation package.
Q: What certification documents are required for EU customs clearance?
A: EU projects require a CE Certificate of Conformity under EN 10219, along with an EN 10204 3.1 mill test certificate. We provide both as standard with every shipment, plus the full customs documentation package including certificate of origin and packing list.
Q: How is invoicing calculated — by theoretical weight or actual weight?
A: We invoice by theoretical weight based on the nominal outer diameter, wall thickness, and 12m length, using the standard steel density formula. The ±10% wall thickness tolerance applies per EN 10219. If your project requires minimum guaranteed thickness, please specify this in your inquiry so we can adjust the quotation accordingly.
