Description
Direct mill supply, no trading markup — API 5L and ASTM grade SSAW spiral welded steel pipe produced from our own steel mill with full heat-number traceability from slab to finished pipe.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SSAW Spiral Welded Carbon Steel Pipe |
| Product Type | SSAW Spiral Welded Steel Pipe |
| Steel Grade | A36, Q195, Q215, Q235, Q345, API 5L Gr.A&B, X42, X46, X52, X56, X60, X65, X70, X80, ASTM A53 Gr.A&B, ASTM A106 Gr.A&B, ASTM A135, ASTM A252, ASTM A500 |
| Standard | API 5L, ASTM A53, ASTM A106, ASTM A135, ASTM A252, ASTM A500, DIN 1626, ISO 559, ISO 3183, GB/T 9711, SY/T 5037, SY/T 5040, EN, BS, JIS |
| Section Shape | Round |
| Outer Diameter | 21.3mm–609.6mm (1/2″–24″) |
| Length | 5.8m / 6m / 12m fixed, 2–12m random, or customer requirements |
| Technique | SSAW (Submerged Arc Spiral Welded) |
| Surface Treatment | Black painted / Galvanized / 3PE coated / Polyurethane foam insulation / Natural |
| Ends | Bevel end (>2″), Plain (≤2″) with plastic cap, screwed and socket |
| Tolerance | ±1% |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Application | Fluid transport / Oil pipeline / Gas pipeline / Hydraulic pipe / Boiler pipe / Drill pipe / Scaffolding / Conduit / Shipbuilding / Industrial plant piping |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas | Transmission pipelines, gathering lines, and distribution networks using API 5L X42–X80 grades with 3PE anti-corrosive coating |
| Industrial Piping | Process fluid lines, boiler feed water, hydraulic systems, and plant utility piping per ASTM A53 and A106 |
| Infrastructure & Piling | Bridge piling, foundation casings, and marine structures per ASTM A252 and SY/T 5040 |
| Construction & Scaffolding | Scaffolding tubes, structural supports, and temporary works per ASTM A500 and SY/T 5037 |
| Shipbuilding & Marine | Ballast lines, fire-main systems, and structural conduits per BS and JIS standards |
Material Certification Gaps Cost More Than the Pipe Itself
When a third-party inspector rejects an entire shipment at destination port, the pipe cost becomes the smallest line item on the loss sheet.
Overseas EPC buyers sourcing SSAW spiral welded steel pipe from China frequently encounter material certification gaps — the fabricator sourced pipe from a local mill that cannot provide EN 10204 3.1 certificates with heat-number traceability, or the coating thickness report does not match the actual product delivered. For oil and gas transmission pipelines running API 5L X60 or X65, this documentation failure means customs hold, third-party inspection rejection, and project schedule delays that dwarf the original procurement savings. [NEED_CITE: material traceability requirements for API 5L pipeline steel]
Matching Pipe Grade and Coating to Pipeline Service Conditions
Selecting the correct SSAW spiral welded steel pipe for a transmission pipeline requires aligning steel grade, wall thickness, and surface protection with the specific service environment. API 5L X42 through X65 grades handle onshore gas transmission with standard 3PE coating, while offshore or buried sections in corrosive soil demand enhanced corrosion protection systems. Our vertically integrated production — from slab to finished pipe — ensures that the heat number on the mill test certificate links directly to the chemical composition and mechanical properties of every pipe delivered, eliminating the traceability gap that plagues fragmented supply chains.
Engineering Compliance and Standard Selection for Global Projects
Different project specifications call for different standard frameworks, and choosing the wrong one creates procurement and compliance failures. EU infrastructure projects require CE marking under EN 10219 or EN 10210, while Middle East oil and gas developments typically specify API 5L with supplementary requirements for sour service. ASTM A53 and A106 govern industrial plant piping in North America, whereas ASTM A252 applies to steel piling for bridge and marine foundations. The SSAW spiral welded steel pipe we produce meets API 5L, ASTM A53, A106, A135, A252, A500, and GB/T 9711 standards, with certified welding procedures per AWS and EN requirements. [NEED_CITE: standard equivalence between API 5L and ASTM pipeline specifications]
Understanding SSAW Process and Grade Selection
The submerged arc spiral welding process produces a continuous helical seam, making it suitable for large-diameter pipe in the 21.3mm to 609.6mm range where seamless or ERW alternatives become cost-prohibitive. API 5L grades from X42 to X80 provide increasing yield strength for higher-pressure transmission applications, while Q235 and Q345 serve general structural and fluid transport duties. The Q-series (Chinese national standard) and S-series (European standard) represent different metallurgical approaches — Q grades emphasize cost-effective carbon-manganese compositions, while S-series grades require specified impact toughness at sub-zero temperatures. Surface treatment selection depends on service environment: 3PE coating provides long-term buried pipeline protection, hot-dip galvanizing suits atmospheric exposure, and black painted finishes serve temporary or indoor applications. Wall thickness tolerance of ±1% ensures consistent pressure rating across the production lot, while fixed lengths of 5.8m, 6m, or 12m optimize container loading for export shipments.
Hidden Costs of Incorrect Grade Selection and Missing Documentation
Specifying API 5L X52 when the project actually requires X65 creates a structural safety risk that only surfaces during hydrostatic testing — at which point the entire pipe lot must be replaced. Similarly, delivering SSAW spiral welded steel pipe without complete mill test certificates or coating thickness reports triggers third-party inspection rejection at destination port, generating demurrage charges, re-inspection fees, and project delay penalties that exceed the original pipe cost by multiples. Material traceability gaps — where the fabricator cannot link the finished pipe to its original heat number — violate API 5L and EN 10219 requirements, making the pipe ineligible for pressure service regardless of its actual mechanical properties. [NEED_CITE: consequences of missing material traceability in pressure piping applications]
Integrated Production Eliminates Procurement Fragmentation
Our steel mill operates three production lines with over 2,800 raw material specifications in stock, meaning the SSAW spiral welded steel pipe you order comes from a single integrated source — no trading company markup, no third-party mill sourcing, no certification chain breaks. Every pipe carries a mill test certificate with heat-number traceability from slab to finished product, and our welding procedures are certified per AWS and EN standards with qualified welders on staff. We accept third-party inspection from SGS, BV, or Lloyd’s at buyer’s expense, and provide complete export documentation including WPS, PQR, weld maps, dimensional inspection reports, and coating thickness measurements. Custom lengths, bevel ends, and special threading are available for project-specific requirements, and our professional loading team prepares lashing diagrams for oversized cargo before container sealing.
Documentation & Compliance
- Mill test certificate documenting API 5L X42–X80 chemical composition and mechanical properties per ISO 3183, with heat-number traceability from steelmaking to finished pipe
- CE certificate confirming compliance with EN 10219 for structural hollow sections, required for EU customs clearance and project acceptance
- ISO 9001 quality management system certificate covering the entire production process from raw material inspection to final dimensional checks
- SGS or BV third-party inspection report verifying wall thickness, coating adhesion, and weld seam quality per client-specified acceptance criteria
- Material traceability documentation linking each pipe to its original heat number, including chemical composition, tensile test results, and Charpy impact values where applicable
- Complete customs documentation package including packing list, bill of lading, certificate of origin, and coating inspection reports for destination port clearance
Packaging, Loading & Delivery
- SSAW spiral welded steel pipe bundled with steel strips and edge protectors to prevent coating damage during ocean transit, with 3PE coated pipes receiving additional wrapping to preserve the anti-corrosive layer
- Fixed lengths of 5.8m, 6m, and 12m optimized for 40ft container loading, with professional lashing diagrams approved before container sealing to prevent cargo shift during voyage
- Galvanized pipes packed with separators between layers to prevent zinc coating abrasion, while black painted pipes receive end caps to protect bevel ends from moisture and handling damage
- Heat number and steel grade stenciled on each pipe end for site identification, with bundle tags showing PO number, heat number, length, and coating type for inventory management
- FOB, CIF, and DDP shipping terms available, with door-to-door logistics coordination for oversized cargo requiring flat-rack containers or breakbulk shipping for diameters above 609.6mm
Submit Your Specifications for Integrated Quotation
Share your project drawings, required steel grade, outer diameter, wall thickness, length, surface treatment, and destination port — we respond within 24 hours with a detailed quotation including material cost, fabrication charges, coating, packing, and shipping, plus mill test certificate samples and production schedule confirmation.
Request Quotation with Mill Test Certificate
Send your SSAW spiral welded steel pipe specifications to admin@xjystructure.com or contact us via WhatsApp at +86 188 5315 7756 for integrated pricing and complete documentation packages.
