1.High corrosion resistance 2.Strong bearing,Light weight 3.Easy installation 4.Excellent fatigue durability 5.Plastic pipes Features: 1. High corrosion resistance 2. Excellent fatigue durability, more than 30 years design service life 3.Strong bearing, high safety coefficient 4. Light weight, easy installation 5. Fine tightness connected with steel pipe 6. No electrical conductivity, smooth internal surface and low friction coefficient improve the efficiency of fluid transport 7. High, middle, low pressure rating satisfy different medium transport