Transmission Joint called expansion joints, expansion joints, compensators and expansion joints. Pumps, valves and other equipment with new product pipeline connections, connect them through the full bolt, making it a whole, and a certain amount of displacement, so that you can be in the installation and maintenance, according to on-site installation size adjustments in work axial thrust can pass also to the entire pipeline. This will not only improve work efficiency, and cut the pump, valve and other equipment to play a protective role. If a metal tube is connected directly with the host belonging to the rigid connection, stretching and other damage occurs in the host vibration will make the tube, a soft connection with the expansion joint, can be offset by the vibration, protection tubes, and to reduce the installation force generated errors on the device, Easy to install. In addition, it is possible to eliminate the effects of thermal expansion and contraction of the fluid inside the metal pipe, installed in the pump inlet and outlet piping of the generic type (i.e., universal) expansion section to compensate for the thermal expansion of the pipeline, reducing piping thermal expansion of the pump thrust, or absorbent pump running vibration generated.