Description
Factory-Direct SSAW Spiral Welded Steel Pipe — Large-diameter API 5L and ASTM A53 pipes manufactured in-house with full mill test traceability, shipped to 50+ countries without broker markups.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SSAW Spiral Welded Steel Pipe |
| Product Type | SSAW Welded Steel Pipe / Spiral Submerged Arc Welded Pipe |
| Steel Grade | Q235, Q345, 20#, A53B, A106B, API 5L Gr.B, X42, X46, X52, X60, X65, ST37.0, ST35.8, ST37.2, ST42, ST45, ST52, STPT G38, STPT G42, STPT42, STB42, STS42, STPT49, STS49 |
| Standard | ASTM A53, ASTM A106, API 5L, ASME B36.10M, DIN 1626, DIN 1629, DIN 17175, DIN 2448, JIS G3452, JIS G3454, JIS G3455, JIS G3456, JIS G3457, JIS G3461 |
| Section Shape | Round |
| Size Range | OD 219.1mm – 3620mm |
| Wall Thickness | SCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160, XXS, DIN/JIS standard thickness |
| Length | 5.8m, 6m, 11.8m, 12m, or custom |
| Technique | SSAW (Spiral Submerged Arc Welded) |
| Surface Treatment | Black painting, black varnish, transparent oil, hot galvanized, 3PE, epoxy coating, BE, PE |
| Tolerance | ±1% |
| Ends | BE (Beveled), PE (Plain End) |
| Application | Low and middle pressure fluid pipeline, boiler, petroleum and natural gas industry, drilling, chemical industry, building industry, machinery |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Petroleum & Natural Gas | Long-distance transmission pipelines, gathering lines, offshore platform risers |
| Municipal Infrastructure | Water supply mains, drainage culverts, stormwater discharge systems |
| Chemical & Industrial | Process fluid transport, boiler feed lines, heat exchanger circuits |
| Construction & EPC | Piling foundations, structural columns, bridge support casings |
| Machinery | Conveyor roller casings, crane boom sleeves, hydraulic cylinder bodies |
When Spiral Weld Geometry Decides Pipeline Integrity
The helical seam distributes hoop stress more evenly than longitudinal welds on large-diameter runs.
EPC contractors sourcing SSAW spiral welded steel pipe for cross-country transmission often discover that standard catalogs stop at 1200mm OD — yet their route engineering demands 2000mm or beyond. Custom large-diameter orders from unfamiliar mills carry real risk: inconsistent seam fusion, missing heat-number traceability, and certificates that fail port inspection. [NEED_CITE: API 5L specification requirements for spiral submerged arc welded pipe] When a 3620mm pipe arrives at site with undocumented wall-thickness variation, the entire section must be rejected — not just the affected joints.
Matching OD and Coating to Buried Pipeline Environments
A 2400mm SSAW spiral welded steel pipe with 3PE anti-corrosion coating handles direct-burial transmission where soil resistivity varies along the route. The spiral seam geometry provides uniform stress distribution under external soil loading, while the three-layer polyethylene system — epoxy primer, copolymer adhesive, and polyethylene outer shell — resists cathodic disbondment over decades of service. For municipal water mains operating at lower pressures, Q235 or Q345 grades with epoxy lining deliver corrosion resistance at lower material cost. Our production lines cover OD 219.1mm through 3620mm across multiple schedule thicknesses, letting procurement teams consolidate pipe, coating, and end treatment from a single source rather than coordinating three separate vendors.
Engineering Compliance and Certification Pathways
Pipeline projects crossing international borders must satisfy the destination country’s pressure equipment directives — EN 10210 and EN 10219 for European markets, ASTM A53 and API 5L for North American and Middle East tenders. [NEED_CITE: EN 10210 hot finished structural hollow sections compliance] The SSAW spiral welded steel pipe we produce carries Lloyd’s Register EU CE marking alongside ISO 9001:2015 certification, with mill test certificates formatted to EN 10204 3.1 requirements. For projects specifying API 5L X42 through X65 grades, each heat number is traceable from slab receipt through final hydrostatic testing. Custom lengths of 11.8m and 12m reduce field weld joints on long-distance routes, while beveled ends prepared to API 5L dimensions enable direct butt-weld connection without secondary machining. [NEED_CITE: API 5L beveled end preparation dimensions]
Steel Grade Selection and Spiral Weld Metallurgy
The API 5L grade system — from Gr.B through X65 — defines minimum yield strength increments for transmission service, with higher grades enabling thinner walls at the same design pressure. Q235 and Q345 serve general structural and low-pressure fluid applications where ultimate tensile strength matters more than precise yield control. The SSAW process itself offers a metallurgical advantage: the spiral weld path means no single cross-section contains the full length of weld metal, distributing any localized imperfections across the helix rather than concentrating them along one longitudinal line. Surface treatment selection follows service environment — hot-dip galvanizing for atmospheric exposure, 3PE for direct burial, epoxy lining for potable water contact, and black varnish with transparent oil for temporary protection during storage and transit. Wall thickness tolerance of ±1% applies across SCH10 through XXS, ensuring that theoretical weight calculations match actual delivered mass within acceptable engineering margins.
The Hidden Cost of Unverified Large-Diameter Pipe
Ordering SSAW spiral welded steel pipe based on price alone exposes projects to three failure modes: wall thickness below nominal tolerance triggers rejection during third-party inspection; missing or forged mill test certificates cause customs holds that idle crews and equipment; and unverified steel grades risk brittle fracture under low-temperature service conditions. [NEED_CITE: consequences of non-conforming steel pipe in pressure applications] A single container of non-compliant pipe doesn’t just waste freight cost — it delays the entire pipeline spread, forcing re-order from alternative sources at premium pricing while the original supplier disputes liability. Proper documentation and independent verification eliminate this risk entirely.
Procurement Confidence from In-House Production
Our facility operates three dedicated SSAW production lines with in-house physical and chemical laboratories conducting incoming material inspection, in-process weld monitoring, and final dimensional verification before shipment. Every SSAW spiral welded steel pipe leaves Jinan with original mill test certificates documenting chemical composition and mechanical properties per the specified standard. We hold 41 invention patents including proprietary forming technology, and our product range covers 2,800+ specifications — meaning that when your engineer calls for an unusual OD or non-standard wall thickness, we quote from existing tooling rather than charging development premiums. Lloyd’s Register EU CE certification and SGS/BV third-party inspection availability satisfy the most demanding tender documentation requirements, while our export experience across 50+ countries ensures that packing lists, certificates of origin, and bills of lading arrive error-free the first time.
Documentation & Compliance
- Mill test certificate documenting API 5L X42–X65 chemical composition and mechanical properties per EN 10204 3.1 format
- Lloyd’s Register EU CE certificate covering EN 10210/EN 10219 compliance for European market projects
- ISO 9001:2015 quality management system certificate with scope covering SSAW pipe manufacturing
- SGS or BV third-party inspection report verifying dimensional accuracy and coating thickness on request
- Full heat-number traceability from steel slab through finished pipe, documented on each bundle
- Customs documentation package including packing list, bill of lading, and certificate of origin formatted to destination port requirements
Packaging, Loading & Delivery
- SSAW spiral welded steel pipe bundled with galvanized steel strips at intervals matching the 12m length, with wooden chocks preventing ovalization during ocean transit
- Black painted or varnished surfaces wrapped in waterproof cloth with transparent oil film preserved under plastic sheeting to prevent condensation damage
- 3PE coated pipes loaded with rubber-padded separators to protect the polyethylene outer layer from abrasion against adjacent bundles
- Custom-length pipes of 5.8m and 11.8m nested to optimize 40ft open-top container utilization, reducing per-ton freight cost on large-diameter orders
- Each bundle tagged with heat number, steel grade, OD, wall thickness, and purchase order reference for site identification
- FOB, CIF, and DDP shipping terms available with professional loading plans calculated for heavy-wall large-diameter pipe weight distribution
Starting Your SSAW Pipe Procurement
Submit your specification sheet including OD, wall thickness, steel grade, quantity, surface treatment preference, and destination port — we respond within 12 hours with detailed pricing, production lead time, and applicable certification documentation. For non-standard dimensions or special coating requirements, our engineering team provides custom fabrication proposals with clear MOQ and delivery timelines.
Request Your SSAW Spiral Welded Steel Pipe Quotation
Send specifications via email or WhatsApp to receive pricing, mill test certificate samples, and loading plan confirmation.
Company: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjysteel.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjysteel.com
