PP-R, a random copolymer of polypropylene (PP) and polyethylene (PE) synthesized via the vapor phase process, features a structure where PE molecules are randomly linked within PP molecules, with molecular weights ranging from 300,000 to 800,000. The piping materials produced from PP-R materials are also known as random copolymer polypropylene piping, a plastic piping product developed and applied from the late 1980s to the early 1990s. With its excellent properties and a wide range of applications, it has secured a position in the plastic piping market and is recognized as an environmentally friendly product. However, recent market operations have analyzed and illustrated quality issues with the aforementioned PP-R plastic piping, revealing numerous problems in the PP-R piping market that significantly hinder its healthy development.