The installation of the expansion joint compensator is a key link to ensure the proper operation and extend the service life of the pipeline system. Here are some generally applicable installation requirements and best practices for different types and uses of joint compensators, including corrugated compensators, sleeve compensators, flanged loose sleeve joints, and more:
Maintain concentricity：
When installing, the compensator should be concentric with the pipe to avoid skew or jamming, and ensure that the compensator can expand and contract freely without deviating from the center.
Guide mount：
Guide supports should be provided on both sides close to the compensator to prevent the compensator from displacing laterally during operation and to ensure that it only performs the expected axial or angular displacement.
Expansion and contraction control：
The amount of expansion and contraction of the compensator is allowed to have a certain deviation range, generally ±5mm. If the temperature difference of the pumping station does not change much, the expansion joint only functions for installation, and should be locked after confirmation by the design unit.
Specification consistency：
Before installation, the specifications of the compensator should be checked to be consistent with the order, ensuring that it meets the design requirements of the piping system.
Unidirectional Compensator Direction：
If a unidirectional compensator is used, the sliding sleeve should be installed at the inflow end of the medium to ensure that the medium flows in the same direction as the compensator is designed for.
Welding and pressure test：
The pipe section welded to both ends of the compensator should be grooved. After welding, the hydraulic pressure test should be carried out according to the acceptance specification. The test pressure is generally 1.5 times of the working pressure. If leakage is found during pressure test, tighten the bolts evenly until there is no leakage.
Different axiality control：
The compensator should be installed along the center line of the pipeline, and the different axiality should be less than 1%, so as to avoid excessive friction and affecting the sealing performance during operation.
Flanged connection：
For the flange type loose sleeve expansion joint, after installation, the nut should be tightened so that the elastic sealing ring inclines each other under the action of the nut gland, and presses tightly on the outer ring of the pipe to play the role of sealing and connection.
Cold tightening：
For compensators that need to be "cold tightened", the auxiliary components used for pre-deformation should be removed after the pipeline is installed to ensure that the compensator can expand and contract freely at normal operating temperature.
Prevent adjustment from exceeding tolerance：
It is strictly prohibited to use the deformation of the compensator to adjust the installation excess tolerance of the pipeline, so as to avoid affecting the function of the compensator, reducing the service life, and increasing the additional load of the pipe system, equipment and supporting members.
Install fixing brackets：
If the compensator is used overhead, the corresponding fixing brackets should be installed at both ends to provide the necessary support.
Regular inspection and maintenance：
After installation, the sealing and working status of the compensator should be checked regularly, and necessary maintenance and adjustment should be carried out in time to ensure its long-term effective operation.
These requirements and practices should be implemented in conjunction with the specific compensator type and application environment, as well as relevant industry standards and specifications. During installation, specific guidance and recommendations provided by the manufacturer should be followed to ensure proper installation and optimal performance of the compensator.