Sleeve compensator Installation method
 

　　Universal socket

　　1. When installing sleeve-type expansion joints, they should be properly managed and stored to prevent contamination caused by exposure to sunlight, rain, and dust.
 

　　2. During installation, check that the compensator’s model, specifications, and design are consistent, and ensure that the product surface is free of defects such as protrusions, dents, or severe corrosion that could affect product quality.

　　3. If the overall length of the finished single-use compensator matches the sample results, no stretching or compression is required. If the installation markings on the flexible body have changed, they should be adjusted before installation.

　　4. The bidirectional non-thrust compensator must be installed according to the direction of medium flow indicated in the schematic diagram shown. When the medium is steam, care must be taken to prevent airlocks from forming within the compensator. To ensure that the compensation amounts in both directions are equal, the design of the bidirectional compensator should place it midway between two fixed points.

　　5. The pipe sections welded to both ends of the compensator must be free of cracks. After welding, perform welding according to the requirements of the hydraulic test (during the pressure test, the bolts at both ends of the casing should be tightened securely until no leakage is detected). After 24 hours of operation, the bolts at both ends of the stuffing box should be retightened.

　　6. To ensure that the system piping experiences no lateral horizontal displacement and only expands and contracts axially, problem-oriented supports can be installed on the sides of the expansion joint. When axial displacement occurs on both sides of the compensator, guiding supports should be installed on both sides to ensure that the axial displacement does not exceed the positive or negative (+/-) degree of the compensator’s eccentricity.

　　7. The waterproofing and thermal insulation structure of the compensator can be identical to that of the pipeline itself; however, it must not impose any restraining force on the expansion joint section.

　　8. Special circumstances will be discussed on a case-by-case basis.

　　New sleeve style

　　1. When installing the compensator, first check whether its specifications meet the requirements of the order.

　　2. The sliding sleeve of the unidirectional pressure compensator should be installed at the inlet end of the working medium.

　　3. The new expansion compensator and the welded pipe sections at both ends of the compensator must be grooved. After welding, a hydrostatic test shall be conducted in accordance with acceptance criteria, with the test pressure set at 1.5 times the working pressure. If leakage occurs in the sealing device during the pressure test, tighten the bolts evenly until no leakage is observed.

　　4. The compensator shall be installed along the pipeline’s centerline, with a deviation no greater than 1%, to prevent excessive frictional pressure during system operation, which could affect the performance of sealing materials.

　　5. Guiding sliding bearings should be installed near pipeline expansion joints to prevent lateral displacement.

　　6. Pay attention to environmental protection when working on sliding surfaces; strictly prohibit any damage or corrosion.

　　7. The outer casing of the bidirectional compensator shall be supported by fixed supports and kept concentric with the pipeline; the compensation distances on both sides should be approximately equal.

　　8. The compensator can be installed according to its length at different temperatures, without requiring pre-tensioning or pre-compression (> the length at the time of factory delivery).

　　Sleeve compensator instructions: The sleeve compensator, also known as a tubular expansion joint or pipeline expansion joint, is a compensation device used in hot-fluid pipelines. It primarily serves as an auxiliary component for straight pipelines. It is suitable for media such as hot water, steam, and oils, and thermal expansion is compensated by the sliding motion of the inner sleeve relative to the outer sleeve.