SQX-C type casing expansion joints within a certain range of axial stretch, but also to overcome the pipeline butt different axial offsets generated within a certain angle, can greatly facilitate the installation and removal of the valve pipe, in pipeline stretching the amount allowed in free expansion, once over its biggest acts to limit the amount of stretching, to ensure the safe operation of the pipeline. Primarily for the protection of the safe operation of the pipeline, has the following effects: Compensation for absorption pipe axial, lateral, angular thermal deformation; deformation of the pipeline absorb earthquake, subsidence; absorbing equipment vibration, reducing equipment vibration impact of the pipeline. SQX-C type casing expansion joints Connection: flanged, welded two, Buried expansion joints (non-trench, located well when installed) commonly used welding. SQX-C type casing expansion joints Installation Notes: 1, the expansion joints in the installation should be preceded by checking its models, specifications and pipeline configuration must meet the design requirements. 2, with the inner sleeve of the expansion joints should pay attention to the direction consistent with the medium flow inner sleeve son, hinge-type expansion joints hinge rotation plane should be consistent with the displacement of the plane of rotation. 3, the need for "cold tight" expansion joints, auxiliary members predeformation should only be used after removal of the pipe is installed. 4, is strictly prohibited to use expansion joints deformation method to adjust the piping installation tolerance, so as not to affect the normal function of the expansion joints, reducing the life and increase the piping, equipment, load bearing member. 5, the installation process is not allowed to slag splashing waves shell surface, allowed to wave shell by other mechanical damage. 6. After installation, piping, should be removed as soon as the mounting wave of expansion joints on the transport of yellow secondary positioning member and fasteners, according to the design requirements to limit device transferred to a predetermined position, the tube system at ambient conditions adequate compensation capabilities. 7, all active components expansion joints shall be external component stuck or limit its scope of activities, should ensure the normal operation of the various moving parts. 8, hydrostatic testing, response times fixed tube frame fitted with expansion joints to reinforce the ends of the pipe so that the pipe does not occur to move or turn. For expansion joints for gas medium and connecting pipe, pay attention to the need for additional water-filled temporary support. Hydrostatic test water cleaning fluid chloride ion content of not more than 96 25PPM. SQX-C type casing expansion joints use: Due to expansion joints has a good overall performance, so it is widely used in chemical, construction, water supply, drainage, oil, light and heavy industrial, refrigeration, sanitation, plumbing, fire, electricity and other infrastructure project.