Socket Welding hoop is a pipe fitting machineed by round steel or ingot after die forging. It is formed by Socket Welding (SW), which inserts steel tubes into Socket for Welding. Therefore, it is called "Socket Welding hoop" and its main manufacturing standards are ANSI/ASME B16.11, GB/T 14383-2008. The varieties of bearing tube hoop include double bearing mouth tube hoop and single bearing mouth tube hoop. Among them, double socket pipe hoop has equal diameter and reducing diameter, reducing double socket pipe hoop has concentric and eccentric points. Bearing and intubation hoop can be widely used in pipelines of different diameters, including single way, three way, four way, etc., and can also be used in water meter and valve. Because of the use of socket structure, so that the pipe joints reduce the cost, installation, use, maintenance is very convenient, at the same time, there is a very high leakproof capacity, very promising market.