1Nonmetallic pipe 2Anti-corrosion,Strong bearing,easy installation 3Excellent fatigue durability 4Light weight 5Many sizes FeaturesHigh corrosion resistanceExcellent fatigue durability, more than 30 years design service lifeStrong bearing, high safety coefficientLight weight, easy installationFine tightness connected with steel pipeNo electrical conductivity, smooth internal surface and low ...