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Spiral steel pipes for power industry pipelines are spiral welded steel pipes designed specifically for power systems. They are made from strip steel coils and manufactured through spiral forming and double-sided submerged arc welding processes. They have high strength, corrosion resistance, compression resistance, and insulation protection properties, and are suitable for cable protection, underground transmission lines, substation grounding, and other scenarios, ensuring the safety and reliability of power transmission.
keyword Electric power industry pipeline steel pipe Category Scene photos Related products Get a quoteDefinition and core characteristics of spiral steel pipes for power industry pipelines
Spiral steel pipes for power industry pipelines are spiral welded steel pipes designed specifically for power systems. They are made from strip steel coils and manufactured through spiral forming and double-sided submerged arc welding processes. They have high strength, corrosion resistance, compression resistance, and insulation protection properties, and are suitable for cable protection, underground transmission lines, substation grounding, and other scenarios, ensuring the safety and reliability of power transmission. Its core function is to meet the strict requirements of the power system for pipeline sealing, durability, and anti-interference through structural optimization and material upgrading.
Technical characteristics and manufacturing processes
1. Materials and processes
Raw materials: Q235B, Q345B low carbon steel or low alloy steel are used, and the strip steel is pre treated with leveling and trimming to ensure mechanical properties and processing accuracy.
Forming and welding: Continuous rolling is carried out through a spiral forming machine, and both inner and outer double-sided submerged arc welding (such as automatic double wire welding technology) is used to ensure the strength of the weld seam, with the weld seam gap controlled within 1-3mm.
2. Anti corrosion and protection design
Multi layer anti-corrosion: For underground humid or chemically corrosive environments, 3PE (epoxy powder+adhesive+polyethylene) is used, with a corrosion resistance time of over 30 years.
Insulation treatment: Apply epoxy resin or polyethylene coating on the surface to enhance insulation performance and avoid current leakage.
3. Performance advantages
High pressure bearing capacity: Spiral welds disperse stress, with a 30% increase in pressure bearing capacity compared to straight seam pipes, and can withstand underground soil pressure and mechanical impact.
Modular design: supports parallel laying of multiple cables, with an internal compartment structure to reduce electromagnetic interference.
Application scenarios and typical cases
Underground cable tunnel
Used for urban power grid renovation, such as DN1200 spiral steel pipe integrated laying of 10kV-220kV cables, with a single tube capable of accommodating 4-6 cables.
High voltage transmission lines
The mountainous transmission project adopts thick walled spiral steel pipes (wall thickness ≥ 12mm) to adapt to complex terrain and high load conditions.
Substation grounding system
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