With the rapid development of the pipeline transportation industry. As a piece of necessary equipment for the construction, operation, and protection of the pipeline system, pigging equipment is also constantly improved and improved. In this field, people have studied and applied two basic categories of soft pigs and mechanical pigs. Some soft pigs, whether spherical or cylindrical, adopt the wear-resistant method of adding fiber. Soft pigs also include foam pigs and polyurethane solid pigs. Urethane Cleaning Pig is a kind of polyurethane solid pig.