Installation method of axially outward pressure type bellows compensator

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Installation method of axial external pressure corrugated expansion joint: 1. Before installation, the model, specifications, and piping configuration of the corrugated expansion joint should be checked to ensure that they meet the design requirements. 　　2. All moving components of the wave compensator must not be trapped by external elements or have their range of movement restricted; normal operation of all moving parts must be ensured. 　　3. For compensators that require \"cold tightening,\" the auxiliary components used for pre-deformation should be removed only after the piping installation is completed. 　　4. It is strictly prohibited to use the deformation of wave compensators to adjust the installation tolerances of pipes, as this may affect the normal functioning of the compensators, reduce their service life, and increase the load on the piping system, equipment, and supporting components. 　　5. During installation, it is not allowed for welding slag to splash onto the surface of the wave shell, nor is it permitted for the wave shell to suffer any other mechanical damage. 　　6. For compensators with an inner sleeve, care should be taken to ensure that the direction of the inner sleeve is consistent with the flow direction of the medium; for hinge-type compensators, the plane of rotation of the hinge should be aligned with the plane of displacement rotation. 　　7. After the piping system is installed, the yellow auxiliary positioning elements and fasteners used for installation and transportation on the wave compensators should be removed as soon as possible. The limiting devices should then be adjusted to the specified positions in accordance with the design requirements, so that the piping system has sufficient compensation capacity under various environmental conditions. 　　8. The insulation material in contact with the bellows of the wave compensator should be free of chlorine. 　　9. During the hydrostatic test, the secondary support brackets at the ends of the pipelines equipped with bellows compensators should be reinforced to prevent the pipelines from moving or rotating. For compensators used in gas media and their connecting pipelines, attention should be paid to whether temporary supports are needed when filling them with water. The water used for hydrostatic testing and cleaning must have a chloride ion content of no more than 25PPM. 　　10. After the hydrostatic test is completed, the water accumulated in the wave tank should be drained as soon as possible, and the inner surface of the wave tank should be dried promptly. Axial external pressure bellows compensators feature large compensation capacity, good thermal insulation properties, and high stability; they are suitable for various installation methods such as overhead, above-ground, and trenchless installations, and they also allow for the removal of residual media ； However, because the effective area at a given nominal diameter is larger than that of other axial bellows compensators of the same type, it exerts a greater internal pressure force on the pipeline. Axial external pressure bellows compensators are mainly used to absorb axial displacement in pipelines; when the compensator is under pressure, the bellows are stretched (or compressed).