Spiral Welded Steel Pipe Manufacturer & Supplier

Uses

1. Core Advantages

Large Diameter Capability: Capable of producing pipes with diameters ranging from 219mm to 3000mm (or larger), meeting the demands of major infrastructure projects.
High-Efficiency Production: Automated continuous welding process ensures high output and consistent quality.
Stable Mechanical Performance: Weld seams undergo heat treatment or non-destructive testing (e.g., ultrasonic or radiographic inspection) to guarantee pressure resistance and fatigue strength.
Material Cost Efficiency: Utilizes steel strips with over 90% material utilization rate, significantly reducing raw material waste.

2. Key Specifications

• Diameter Range: DN200–DN3000 (approx. 219mm–3200mm outer diameter)
• Wall Thickness: 3mm–25mm (customizable based on pressure requirements)
• Length: Typically 6m–12m, with cutting to specific lengths available
• Material Grades: Carbon steel (e.g., Q235B, Q355B) or pipeline steel (e.g., L245, L360)

3. Production Process Flow

1. Steel Coil Uncoiling: Leveling and cutting steel strips to required width
2. Spiral Forming: Rolling steel strips into a helical cylindrical shape
3. Internal & External Welding: Multi-wire submerged arc welding for simultaneous inner and outer seams
4. Weld Seam Treatment: Grinding and non-destructive testing (ultrasonic/X-ray inspection)
5. Sizing & Straightening: Ensuring roundness and straightness of the pipe body
6. Cutting & Inspection: Cutting to specified lengths and conducting final quality checks

4. Main Applications

Oil & Gas Transportation: Long-distance pipelines for crude oil and natural gas, high-pressure transmission systems
Power Generation: Circulating water pipes in power plants, structural supports for desulfurization systems
Water Infrastructure: Water supply/drainage pipelines, pump station pressure pipes
Marine Engineering: Ballast water tanks, seawater piping systems
Mechanical Structures: Support frames for heavy equipment, bridge truss components