The purpose of these compensators is to take axial and radial displacements. The force due to internal pressure is eliminated by the construction of the compensator so that only forces due to spring action are transferred to the rest of the pipeline.
It is applied in pipelines where solid points cannot be reported, where the application of other solutions is limited by space, and when is necessary to minimize the load on other equipment in the pipeline such as turbines, pumps, valves, etc.