Spiral Corrugated Steel Pipes offer an optimal combination of strength, durability, and hydraulic efficiency. Featuring a spiral pattern and locking seam construction, they are made from high-quality galvanized steel sheets to ensure long-term performance. These pipes are available in various diameters and corrugation profiles, making them suitable for diverse project requirements, including culverts, drainage systems, and infrastructure solutions.
Specifications
- Pipe Diameter: 300mm – 2500mm (12” – 100”)
- Length: 1m – 12m (customizable per project needs)
- Thickness: 1.6mm – 3.2mm
- Corrugation Options:
- 68x13mm (2-2/3” × 1/2”) for diameters under 1m
- 75x25mm (3” × 1”)
- 125x25mm (5” × 1”) for diameters over 1m
Structure
Spiral corrugated steel pipes are manufactured using galvanized steel belts with spiral seaming joints for enhanced strength and durability.
- Diameters under 1m: Standard corrugation 68x13mm with section lengths of 6m.
- Diameters over 1m: Corrugation 125x25mm with standard section lengths of 6m (custom sizes available).
Connection Systems
The pipes can be connected based on project specifications using:
- Clamping bands
- Flanges with PE plates, sealant, or rubber gaskets
- High-strength bolts and nuts (Grade 8.8 or higher per GB/T1231 standards)
Materials
- Steel Plate: DX52D or SGHC, meeting EN10327 or JIS G 3302-2010 standards, with size tolerance according to GB/T-709.
- Clamping Bands and Angle Steel: Made from Q235 steel, compliant with GB/T700 standards.
- Fasteners: High-strength bolts and nuts (Grade 8.8 or above).
- Galvanization: Pipes are formed using hot-dip galvanized steel belts or galvanized after forming to ensure corrosion resistance.
Characteristics
- High Strength The corrugated structure provides exceptional compression strength, making it 1.5 times stronger than traditional concrete pipes.
- Lightweight and Easy Transport Spiral corrugated steel pipes weigh only 1/10 to 1/5 of similarly sized concrete pipes, allowing for easy transportation. Smaller sections can even be carried manually without heavy machinery.
- Quick Installation These pipes are connected using clamping bands or flanges, and the lengths can be customized according to project requirements. This streamlined connection process enables faster installation and reduced labor time.
- Long Service Life Manufactured with galvanized steel plates featuring 300-600g/m² zinc coating, these pipes have a typical lifespan of 50-100 years. For highly corrosive environments, additional asphalt coating on the interior and exterior surfaces can extend the service life by an additional 20-50 years.
- Cost-Effective Spiral corrugated steel pipes offer significant cost savings due to their lightweight design, quick installation, and reduced need for extensive foundation work. For instance, in an 800mm diameter comparison, steel pipes cost approximately 90% of concrete alternatives while eliminating expenses for forklifts, cranes, and complex transportation in challenging conditions.
- Customizable Lengths Standard sections are 6m in length, but pipes can be produced to meet specific project needs, further enhancing efficiency and adaptability.
Application
Spiral corrugated steel pipes are widely used across various sectors for drainage, culverts, and protection systems.
- Municipal Drainage: Suitable for building exterior drainage, sewage systems, and stormwater management.
- Road and Railway Systems: Ideal for culverts, underground conduits, small tunnels, and cross drains.
- Industrial Applications: Used for factory drainage, airport water management, and air conduits in coal mines under negative pressure.
- Farm and Agricultural Use: Serves as irrigation siphons, farm drainage systems, and driven well walls.
- Protective Shells: Acts as protection for underground cables, gas pipes, construction site structures, and temporary shelters.
- Efficient Drainage Solutions These pipes provide reliable drainage performance in various environments, including domestic sewage, golf courses, underground garages, airports, and industrial facilities.
- Durable Culvert Solutions Spiral corrugated steel pipes are perfect for culvert applications such as road and railway cross drains, underground conduits, small bridges, and water management tunnels.
- Strong Protective Shell Offering superior protection for sensitive infrastructure, they are ideal for shielding communication cables, gas lines, and temporary site structures.
- Agriculture: Provides efficient irrigation, water drainage, and support for farm well walls.
- Industry: Functions as air conduits for coal mines and robust drainage solutions for factories.
Appearance
Smooth surface with consistent zinc coating for enhanced protection against corrosion.
Clamping Band System
Pipes are connected using durable clamping bands to ensure secure alignment and prevent separation or material seepage at joints.
Assembly Requirements:
- Clamping bands overlap equally on each pipe section.
- The overlapped portion must withstand tightening forces during installation.
- The gap between connected pipe sections should not exceed 25mm.
Specifications:
- Standard band width: 440mm.
- For larger pipe diameters, 2 or more clamping band pieces may be used as required.
Angle Steel Connection
- Material: High-strength Q235 steel is used for angle steel components.
- Flanges are fabricated by bending angle steel, manual electric-arc welding, and drilling holes.
- Corrugated pipe ends are welded with angle steel flanges to ensure strong and reliable connections.
- Flange Specifications:
- Pipes with diameters of 1m or smaller: Edge length 56mm, thickness 6mm equal-sided angle steel.
- Pipes with diameters larger than 1m: Edge length 70mm, thickness 6mm equal-sided angle steel.
- For high-pressure applications: Width 70mm, thickness 6mm flat steel is used.
- After welding, the internal and external seams are coated with Dacromet at room temperature for additional protection.
