The development of modern cities requires several power transmission cables buried in the ground, which requires the electrical protection pipe to have good heat resistance, insulation, easy laying of electric fabrics and flame retardancy. CPVC pipes have precisely these properties. At present, it has been widely used in this field by some advanced countries, and my country has also begun to try this field and has been selected and adopted by some large and medium-sized cities for power grid transformation. There are dozens of domestic manufacturers of mass production of CPVC/PVC pipes. Their products are for power transmission services. The target value of Vicat softening point is 93. The colors are orange or orange, and the national property grease accounts for 70%-80% of the annual supply. The cargo volume is around 20,000-30,000 t/a.
