PPR is the abbreviation of type III polypropylene, also known as random copolymerized polypropylene pipe. It adopts hot fusion welding, has special welding and cutting tools, and has high plasticity. The price is also very economical. The external thermal insulation layer has better thermal insulation performance, and the pipe wall is also very smooth, excluding the joints of internal and external wires. It is generally used in embedded walls or embedded pipes in deep wells. PPR pipe has moderate price, stable performance, heat resistance, thermal insulation, corrosion resistance, smooth inner wall without scaling, safe and reliable pipeline system without penetration, and its service life can reach 50 years. However, due to the high construction technology requirements, special tools and professionals are required to ensure the system safety.