The correct selection of corrugated expansion joints is very important, which can compensate the axial, transverse or angular displacement of the medium in the pipeline due to the change of thermal expansion and cold contraction temperature, so as to play the role of normal and safe operation of the pipeline. The indirect importance of the correct selection of corrugated expansion joints is to avoid unnecessary cost budget waste in pipeline projects.

Therefore, before selecting a model for the corrugated expansion joint, it is necessary to ensure that accurate technical parameters are provided, such as nominal diameter, working pressure, medium, medium temperature, connection mode, installation form and compensation amount. When selecting the accurate model of the corrugated expansion joint, the material and thickness of the corrugated, the material and thickness of the flow guide cylinder and the number of ripples are also determined to ensure that the quotation of the corrugated expansion joint is correct.