Thick Wall Large Diameter Spiral Steel Pipe
For demanding large-scale infrastructure and industrial projects, the choice of piping is critical. Our thick wall large diameter spiral steel pipe is engineered to meet the most rigorous specifications and standards, providing unmatched structural integrity and longevity. This product line is designed to handle high-pressure applications, corrosive environments, and significant earth loads, making it an ideal solution for major water transmission, piling, and heavy-duty construction. We adhere strictly to international standards to ensure performance and safety. You can explore our high-quality API 5L Large Diameter Spiral Pipe for oil and gas transmission applications, our robust ASTM A252 Spiral Piling Pipe for foundational support, our durable AWWA C200 Spiral Welded Steel Pipe for potable water systems, and our abrasion-resistant Large Diameter Spiral Pipe for Dredging for marine and land reclamation projects.
The manufacturing process of our Thick Wall Large Diameter Spiral Steel Pipe involves high-precision spiral welding of hot-rolled steel coils, producing a continuous, uniform helix seam. This method results in a pipe with superior strength-to-weight ratio and excellent dimensional stability across its entire length. The thick wall design provides exceptional resistance to internal and external pressures, making it suitable for deep burial, high-head water applications, and structural columns. Our production is supported by advanced non-destructive testing (NDT) methods, including ultrasonic testing and X-ray inspection, to guarantee weld integrity and overall pipe quality. We offer comprehensive customization, including various protective coatings and linings, to extend service life in aggressive environments.
Key Product Specifications & Parameters
- Manufacturing Standard: API 5L, ASTM A252, AWWA C200, EN 10219, etc.
- Outer Diameter (OD): 406 mm (16") up to 2540 mm (100") and larger.
- Wall Thickness: 6.0 mm up to 25.4 mm (1 inch), with custom thickness available.
- Pipe Length: Typically 6 meters to 12.5 meters, or as per project requirements (max. ~18m).
- Steel Grade: Common grades include GR.B, X42 to X70 (API 5L), Gr. 1, 2, 3 (ASTM A252).
- End Finish: Plain end, beveled end, or fitted with flanges/weldolets.
- Coating Options: External: 3-Layer PE, FBE, Bitumen. Internal: Cement Lining, FBE, Epoxy.
| Standard | Primary Application | Key Material Grades | Typical Yield Strength (Min) |
|---|---|---|---|
| API 5L PSL1 / PSL2 | Oil & Gas Transmission, Pipelines | B, X42, X46, X52, X56, X60, X65, X70 | 241 MPa (35,000 psi) to 483 MPa (70,000 psi) |
| ASTM A252 | Pipe Piling, Foundation Support | Grade 1, Grade 2, Grade 3 | 207 MPa (30,000 psi) to 345 MPa (50,000 psi) |
| AWWA C200 | Water Works, Sewage, Drainage | Various (Often specified per project) | As per specified steel grade (e.g., 290 MPa) |
| EN 10219 / EN 10217 | General Structural, Construction (EU) | S235, S275, S355, etc. | 235 MPa to 355 MPa |
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