SQX-C-type tube-type expansion joints use 
 SQX-C-type expansion joints in the casing within a certain range of axial stretching, but also within a certain angle in the butt to overcome the pipeline resulting from the different axial offset, can greatly facilitate the installation and removal of valves, pipe, the amount of expansion in the pipeline to allow free expansion, once across the stretching capacity to serve the maximum limit, to ensure the safe operation of pipelines. Mainly for the protection of the safe operation of pipelines, has the following effect: compensation absorption pipe axial, lateral, angular thermal deformation; absorbing equipment vibration, reducing equipment vibration of the impact of the pipeline; absorb the earthquake, subsidence deformation of the pipeline. 
 SQX-C-type casing expansion joints function: 

 SQX-C-type casing expansion joints, also known as expansion joints, expansion joints, compensators, divided into: bellows, sleeve compensator, rotating compensator, the square of natural compensation, and other major type, of which the bellows more commonly used, mainly for the protection of the safe operation of pipelines, with the following functions: 
 1. Compensation for absorption tube axial, lateral and angular thermal deformation. 
 2. Absorbing equipment vibration, reducing equipment vibration of the pipeline. 
 3. Uptake earthquake, subsidence deformation of the pipeline.