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一. Application Analysis
1. Application fields
Municipal engineering (large-diameter water supply, drainage and sewage treatment pipelines) features high pressure resistance, corrosion resistance and leakage prevention
Water conservancy projects (irrigation systems, flood control and drainage pipelines) are wear-resistant, impact-resistant and weather-resistant
It is resistant to chemical corrosion, high temperature and flame retardancy in industrial fields (petrochemicals, power transmission pipelines)
Lightweight, UV-resistant and root-puncture resistant for agricultural irrigation (long-distance water conveyance pipelines)
二. Technical Advantages
1.Material optimization and cost control
Inner layer: Made of high-density polyethylene (HDPE) or modified materials to reduce friction and wear and extend service life.
Middle layer: The reinforcing layer (such as the hollow wall structure) enhances the compressive strength and reduces the material usage.
Outer layer: Add carbon black or wear-resistant agent to enhance weather resistance and UV resistance.
Cost-effectiveness: It reduces material consumption by approximately 15% to 20% compared to single-layer structures, thereby enhancing production efficiency
Co-extrusion technology enables one-time molding, shortening the production cycle (increasing it by more than 30% compared to traditional processes).
The automated control system (such as KraussMaffei equipment from Germany) supports continuous production, with an annual production capacity of 5,000 to 8,000 tons.
2.Performance enhancement
Pressure resistance: The circumferential stress is increased by 20%-30%, meeting the long-term usage requirements of DN1200mm pipes under a pressure of 1.6MPa.
Corrosion resistance: Suitable for acidic and alkaline environments (pH value 3-11), with a service life of over 50 years (in accordance with ISO 14020 standard).
Crack resistance: The three-layer structure disperses stress and reduces the risk of circumferential cracking.
三. Summary and Suggestions
The PE three-layer co-extrusion production line is suitable for high-demand scenarios of large-diameter pipes, and its cost optimization and performance advantages are significant.
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