Rubber joint is also called rubber pipe soft joint, flexible rubber joint, rubber soft joint, flexible rubber joint, high pressure rubber joint, rubber shock absorber, compensator and so on. According to the connection mode, there are three kinds: loose sleeve flange type, fixed flange type and thread type. According to the structure can be divided into single sphere, double sphere, reducing body, curved sphere and wind pressure coil 5 kinds. The tubular rubber parts are formed by the inner and outer layer of rubber, the cord layer and the steel wire ring, which are vulcanized and then combined with the metal flange or the parallel joint loose sleeve. This product can reduce vibration and noise, and can compensate for thermal expansion and cold contraction caused by temperature change, and is widely used in various pipeline systems.