DN1000 High-Performance Plastic Coated Composite Steel Pipe
The Main Artery for Urban and Industrial Water Transportation Systems
Product Core Value and Industry Positioning
As a core pipeline for large-scale urban and industrial water transportation systems, DN1000 plastic-coated steel pipe perfectly combines the mechanical strength of steel materials with the excellent corrosion resistance of plastic coatings. Compared to traditional steel pipes, the smoothness of the inner wall has improved by more than 40%, and transportation efficiency has increased by 15% to 20%, making it an ideal choice for long-distance, high-flow projects such as inter-regional water transportation and urban main water supply networks.
Innovative Process and Material Breakthroughs
Dual Coating Protection System
- Inner Coating: Food-grade epoxy resin (thickness ≥0.35mm), compliant with GB/T 17219 drinking water hygiene standards.
- Outer Coating: High-density PE or epoxy powder (thickness ≥0.5mm), resistant to UV and chemical corrosion, accommodating temperature variations from -40°C to 80°C.
Structural Reinforcement Design
- High-Strength Base Pipe: Q235B/Q355C spiral welded steel pipe (9-10mm), with maximum pressure resistance of 2.5MPa and strong deformation resistance.
- Process Innovation: "Pipe end expansion + chamfering" process protects the coating at connection points, with peel strength >50N/cm.
Connection Methods by Scenario Application
| Connection Method | Application Scenario | Technical Advantages |
|---|---|---|
| Flange Connection | Pump stations, valve chambers | Dismountable, gasket pressure resistant to 16Bar |
| Groove Clamp | Underground pipeline networks | Installation efficiency improved 3x, excellent seismic resistance |
| Bimetal Welding | High chemical risk areas | Self-repairing weld joints, prevents rust |
Regional Project Cases
- North China - Cangzhou South-to-North Water Transfer Branch: Operated for 5 years without corrosion in saline-alkaline soil, reducing maintenance costs by 60%.
- South China - Foshan Municipal Renovation: Adapted to ground subsidence during typhoon seasons, achieving zero leakage with groove joints.
Selection Technical Guidance
Flow Rate and Diameter Matching
$ Q(m^3/h) = v(m/s) \times S(m^2) \times 3600 $
With a recommended flow velocity of 1.5-2.0m/s, the maximum water transportation capacity of DN1000 pipe is $ \approx 5600m^3/h $.
Pressure Matching Principles
- PN10 Class (1.0MPa): Suitable for general urban water supply.
- PN16 Class (1.6MPa): Suitable for mountainous or hilly systems requiring pump pressurization.