Description
Factory-Direct SSAW Spiral Steel Pipe Supply — In-house production covering OD 219.1–3620mm with full API 5L and ASTM certification for pipeline projects.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SSAW Spiral Steel Pipe |
| Product Type | SSAW 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, ST52.4 |
| Standard | ASTM A53, ASTM A106, API 5L, ASME B36.10M, DIN1626, DIN1629, DIN17175, DIN 2448, JIS G3452, JIS G3454, JIS G3455, JIS G3456, JIS G3457, JIS G3461 |
| Section Shape | Round |
| Outer Diameter | 219.1mm–3620mm |
| Wall Thickness | SCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160, XXS |
| 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 |
| Ends | BE (Beveled), PE (Plain End) |
| Tolerance | ±1% |
| Application | Low and middle pressure fluid pipeline, boiler, petroleum and natural gas industry, drilling, chemical industry, water transportation systems |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas Transmission | Long-distance crude oil and natural gas pipelines using API 5L X42–X65 grades with 3PE anti-corrosion coating |
| Municipal Infrastructure | Urban water supply networks and drainage systems with Q235/Q345 spiral pipes in 3PE or epoxy coating |
| Industrial Plant Piping | Boiler feed water lines and chemical fluid transport using ASTM A106 or DIN17175 compliant SSAW pipes |
| Piling & Foundation | Large-diameter spiral pipes for bridge piers and offshore platform foundations |
When Wall Thickness Tolerance Decides Pipeline Acceptance
A ±1% tolerance on a 20mm wall means ±0.2mm — acceptable for structural use, but borderline for high-pressure welding joints.
Pipeline contractors sourcing SSAW spiral steel pipe for transmission lines face a recurring issue: mill test certificates show nominal wall thickness, but actual measurements at the weld seam fall below minimum requirements. This triggers rejection during third-party inspection or causes welding defects during field jointing. The root cause often traces back to suppliers who quote based on theoretical weight while delivering pipes at the lower end of tolerance bands. For API 5L X52 and X60 grades intended for sour service or high-pressure gas transmission, even minor wall thinning at the helical weld can compromise hydrostatic test performance. [NEED_CITE: API 5L specification requirements for wall thickness tolerance]
Matching Spiral Pipe Specifications to Transmission Line Requirements
Large-diameter SSAW spiral steel pipe in the 800mm–2000mm OD range serves as the backbone for cross-country oil and gas transmission. The spiral welding pattern distributes hoop stress more evenly than longitudinal seams, making it suitable for pressures up to 10 MPa when manufactured to API 5L X60 or X65 specifications. For municipal water projects requiring corrosion resistance, 3PE coating (three-layer polyethylene with epoxy primer) provides 20+ year service life in buried conditions. Our production lines cover the full OD 219.1–3620mm range with wall thickness from SCH10 to XXS, allowing single-source procurement for projects combining multiple diameter segments.
Engineering Compliance and Certification Requirements
Pipeline projects crossing international borders require documentation that satisfies both origin-country manufacturing standards and destination-country import regulations. SSAW spiral steel pipe manufactured to API 5L must carry mill test certificates showing chemical composition (carbon equivalent for weldability), mechanical properties (yield strength, tensile strength, elongation), and hydrostatic test results per heat number. For European market entry, CE marking under EN 10219 or EN 10210 demonstrates conformity with pressure equipment directives. Third-party inspection by SGS or BV before shipment verifies dimensional accuracy, weld seam quality via ultrasonic testing, and coating thickness for 3PE or epoxy finishes. [NEED_CITE: EN 10219 cold-formed hollow section certification requirements]
Understanding Steel Grade Selection for Pressure Applications
The API 5L grade system designates minimum yield strength in ksi — X42 indicates 42 ksi (290 MPa), X52 indicates 52 ksi (360 MPa), X65 indicates 65 ksi (450 MPa). Higher grades allow thinner walls for the same pressure rating, reducing material cost and weight, but require stricter control of carbon equivalent to maintain weldability. Q235 and Q345 (Chinese GB standards) correspond roughly to ASTM A36 and A572 Gr.50 respectively, suitable for low-pressure water transmission and structural piling. The SSAW process itself influences grade selection: spiral welding introduces residual stresses that require post-weld heat treatment for X60 and above when used in sour service (H2S environments). Surface treatment selection depends on service environment — black painting for indoor or temporary use, hot-dip galvanizing for atmospheric corrosion protection, 3PE coating for buried pipelines in aggressive soils.
Hidden Costs of Incorrect Grade or Certification
Ordering SSAW spiral steel pipe without verifying mill test certificate authenticity creates downstream risks that far exceed initial price savings. Pipes supplied with falsified grade markings may pass visual inspection but fail hydrostatic testing at site, causing project delays and replacement costs. Missing CE documentation blocks customs clearance in EU markets, resulting in demurrage charges or forced re-export. Negative tolerance abuse — where actual wall thickness consistently falls below nominal — reduces pressure rating and may violate ASME B31.3 or EN 13480 design codes, exposing the project owner to liability in case of failure. [NEED_CITE: consequences of non-compliant steel pipe in pressure applications]
Why Source SSAW Spiral Steel Pipe From Our Facility
Our Jinan production facility operates dedicated SSAW lines covering OD 219.1–3620mm with wall thickness up to SCH160 and XXS, eliminating the need to consolidate from multiple suppliers. In-house physical and chemical laboratories perform tensile testing, charpy impact testing, and chemical analysis per heat, with full mill test certificates issued for every shipment. We hold ISO 9001:2015 certification, Lloyd’s CE marking for EN 10219/EN 10210 compliance, and Singapore FPC approval for regional projects. Third-party inspection by SGS or BV is arranged on request, with dimensional checks, ultrasonic weld examination, and coating thickness measurement documented before container loading. For large-diameter pipes exceeding container length, we provide professional lashing with cross-bracing and pipe-end protectors to prevent deformation during ocean transit — a critical detail for 12-meter lengths shipped in open-top or flat-rack containers.
Documentation & Compliance
- Mill test certificate documenting API 5L X52 chemical composition (C, Mn, Si, P, S, CE) and mechanical properties (yield strength, tensile strength, elongation) per heat number
- CE certificate confirming EN 10219 compliance for structural hollow sections or EN 10210 for hot-finished profiles, required for EU market entry
- ISO 9001:2015 quality management system certificate covering SSAW pipe manufacturing processes
- SGS or BV third-party inspection report verifying OD, wall thickness, weld seam quality, and coating thickness before shipment
- Material traceability sheet linking each pipe to heat number, production date, and test results
- Export documentation including packing list, bill of lading, certificate of origin, and fumigation certificate for wooden packaging
Packaging, Loading & Delivery
- SSAW spiral steel pipe bundled with steel strips at intervals not exceeding 2 meters, with edge protectors to prevent coating damage during handling
- 3PE-coated pipes wrapped with PE film and separated by rubber pads to preserve anti-corrosion layer during ocean transit
- Large-diameter pipes (OD 1000mm+) loaded in open-top containers or on flat-rack trailers with cross-bracing to prevent rolling and end deformation
- Custom cutting to 5.8m, 6m, 11.8m, or 12m lengths per project specification, with beveled ends protected by plastic caps
- Heat number and steel grade stenciled on each pipe end for site identification and traceability
- FOB Qingdao, CIF destination port, or DDP door-to-door delivery available, with professional loading supervision for containerized shipments
Requesting Quotation and Technical Documentation
Submit your SSAW spiral steel pipe requirements including outer diameter, wall thickness, steel grade, surface treatment, quantity, and destination port to receive detailed quotation with unit price per ton or per meter, production lead time, and shipping terms. We provide mill test certificates, third-party inspection coordination, and professional loading plans for your review before order confirmation.
Start Your SSAW Spiral Steel Pipe Inquiry
Send specifications to receive quotation and mill test certificate samples.
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjypipe.com
Frequently Asked Questions
Q: What is the difference between SSAW and LSAW spiral steel pipe for pipeline projects?
A: SSAW (Spiral Submerged Arc Welded) pipe uses helical welding seams, allowing production of large diameters from narrower steel coils, making it cost-effective for OD above 500mm. LSAW (Longitudinal Submerged Arc Welded) uses straight seams and is preferred for high-pressure applications requiring uniform weld quality. SSAW spiral steel pipe suits water transmission, piling, and low-to-medium pressure gas lines, while LSAW serves high-pressure oil and gas transmission.
Q: Can you provide API 5L X52 and X60 grades with sour service compliance?
A: Yes, we produce API 5L X42, X46, X52, X60, and X65 grades with optional HIC (hydrogen-induced cracking) and SSC (sulfide stress cracking) testing for sour service environments. Mill test certificates include carbon equivalent values for weldability assessment, and charpy impact test results at specified temperatures.
Q: What surface treatment options are available for buried pipeline applications?
A: For buried SSAW spiral steel pipe, we offer 3PE coating (three-layer polyethylene with fusion-bonded epoxy primer) providing 20+ year corrosion protection in aggressive soils. Epoxy coating suits less demanding environments, while hot-dip galvanizing works for above-ground or splash-zone applications. Black painting with varnish serves temporary protection during storage and transport.
Q: How do you ensure wall thickness tolerance for large-diameter pipes?
A: Our SSAW production lines maintain ±1% wall thickness tolerance through inline ultrasonic measurement and manual verification at 1-meter intervals. Mill test certificates document actual measurements at multiple points around the pipe circumference. Third-party inspection by SGS or BV can verify dimensional compliance before shipment.
Q: What is the maximum length available for containerized shipment?
A: Standard lengths include 5.8m, 6m, 11.8m, and 12m. For 12-meter SSAW spiral steel pipe, we use open-top containers or flat-rack containers with professional lashing and cross-bracing to prevent movement and end deformation during ocean transit. Custom lengths up to 18m are available for break-bulk shipment.
