Compensators, also commonly referred to as expansion joints or flexible joints, are composed of the bellows (a type of elastic element) that form the core of their operation, along with end pipes, supports, flanges, conduits, and other accessories. They are a type of compensating element. They utilize the excellent伸缩 deformation of the bellows to absorb size changes in pipelines, conduits, vessels, etc., caused by thermal expansion and contraction, or to compensate for the axial, lateral, and angular displacements of pipelines, conduits, and vessels. They can also be used for noise reduction and vibration damping. They are widely used in modern industry. In heating applications, to prevent pipeline deformation or damage due to thermal expansion or temperature stress when heating pipes, compensators need to be installed in the pipelines to compensate for the thermal expansion, thereby reducing the stress on the pipe walls and the forces acting on valves or support structures.