Tetrafluoro compensator (also known as expansion joint) is used in pipeline systems with strong corrosive media to compensate for displacement and installation deviation caused by thermal expansion and contraction, and reduce vibration of pipeline systems. Below are the inspection steps for the PTFE compensator.

1. Before installation, the compensator should be checked for its model, specifications, and pipeline configuration, which must meet the design requirements.

2. For compensators with inner sleeves, attention should be paid to aligning the direction of the inner sleeve with the flow direction of the medium. The hinge rotation plane of hinge type compensators should be consistent with the displacement rotation plane.

3. Compensators that require "cold tightening" and auxiliary components used for pre deformation should be removed after the pipeline installation is completed.

4. It is strictly prohibited to use the method of deformation of corrugated compensators to adjust the installation deviation of pipelines, in order to avoid affecting the normal function of compensators, reducing their service life, and increasing the load on pipeline systems, equipment, and supporting components.

5. During the installation process, welding slag is not allowed to splash onto the surface of the wave shell, and other mechanical damage to the wave shell is not allowed.

6. After the installation of the piping system is completed, the yellow auxiliary positioning components and fasteners used for installation and transportation on the corrugated compensator should be removed as soon as possible, and the limiting device should be adjusted to the specified position according to the design requirements, so that the piping system has sufficient compensation capacity under environmental conditions.

7. All moving components of the compensator shall not be stuck or restricted by external components, and the normal operation of each moving part shall be ensured.

8. During the water pressure test, the secondary fixed pipe frame at the end of the pipeline equipped with a compensator should be reinforced to prevent the pipeline from moving or rotating. For compensators and their connecting pipelines used for gas media, attention should be paid to whether temporary brackets need to be added during water filling. The 96 chloride ion content of the cleaning solution used in water pressure testing shall not exceed 25PPM.

9. After the water pressure test is completed, the accumulated water in the wave shell should be drained as soon as possible and the inner surface of the wave shell should be quickly blown dry.

10. The insulation material in contact with the compensator bellows should not contain chloride ions.