Bellows compensator, also commonly referred to as an expansion joint or flexible joint. It consists of the bellows (a type of elastic element) that form the main working part, along with end pipes, brackets, flanges, conduits, and other accessories. Primarily used in various pipelines, it can compensate for thermal displacement of the pipeline, mechanical deformation, and absorb various mechanical vibrations, thereby reducing pipeline deformation stress and extending the service life of the pipeline.