Glass fiber reinforced PP-R pipes (briefly called FR/PP-R) are piping materials produced through special technology and equipment by usingmulti-layer co-extrusion, low temperature and high speed. Based on advantages of PP-R products, these products also have the following big advantages.:1. The linear expansion coefficient accounts only for about 20~30% of the ordinary PP-R products.2. Strengthening of pipe rigidity preventing deflection of pipeline .3. Good resistance to ultraviolet radiation: black outside layer of FR/PP-R pipe can eliminate radiation of solar energy providing pipe with a protective barrier against ultraviolet radiation.4.Higher pressure resistance and longer service life under conditions of designed vibration force.