PP polypropylene quiet pipes with excellent overall performance. High strength, good insulation, low water absorption, high heat distortion temperature, low-density, high crystallinity and other characteristics. Have a good solvent, oil class resistance, weak acid, weak base properties. POM has a high hardness and rigidity, with a high degree of resistance to creep and stress relaxation ability, excellent wear resistance, self-lubrication, and fatigue, can not be compared to other engineering plastics.