The location of the sleeve compensator needs to be carefully planned to ensure that it effectively absorbs the displacement of the pipe due to thermal expansion and contraction and maintains the stability and safety of the entire pipe system. Here are some general guidelines on where to install a sleeve compensator:
Close to retaining bracket: Unidirectional sleeve compensators should generally be arranged between adjacent fixed brackets and are recommended to be installed close to one of the fixed brackets. This ensures that there is enough room for the compensator to expand and contract when the pipe is displaced. The tail pipe connected with the outer sleeve is connected close to the fixed bracket, while the core pipe is connected with the compensation pipe section.
Midpoint position: For bi-directional sleeve compensators, they should be installed at the midpoint position of the pipe between two adjacent fixed brackets, so that displacement from both sides can be absorbed more evenly. Depending on the working environment, it may also be necessary to consider whether to set a secondary fixation bracket.
Avoid pipe attachments: Try not to install the sleeve compensator at the elbows, valves and other accessories of the pipe, because these areas may add additional stress or limit the free expansion and contraction of the compensator.
Pipe axis alignment: A coaxial line shall be maintained between the compensator and the pipe to reduce friction during operation and ensure good sealing.
Media flow direction: The installation direction should follow the principle that the medium flows in from the core tube end and out from the outer sleeve end, especially for compensators with inspection valves, it is necessary to avoid improper injection of steam at the outlet of the lead-out tube.
Spacing vs. Quantity: The number and placement of sleeve compensators should be determined according to the actual situation, usually one is installed every 15-20 meters. However, the specific spacing needs to be determined based on factors such as the actual length of the pipe, diameter, medium temperature, and pressure.
Reserve space for fine-tuning: During installation, a certain spacing distance should be left to allow necessary fine-tuning during pipeline operation.
Perpendicular to the axis: The sleeve compensator shall be mounted perpendicular to the pipe axis for elastic deformation upon thermal expansion and contraction.
Avoid serial installation: Only one compensator is usually installed between two adjacent fixed brackets, so as to avoid series installation.
Welding and beveling treatment: The connection between the sleeve compensator and the pipeline shall be properly welded, and the pipe section shall be beveled before welding. After welding, the hydraulic pressure test shall be carried out according to the acceptance specification.
In practical operation, the compensator specifications should be checked to be as ordered before installation, and the manufacturer's guidelines and industry standards should be followed during installation to ensure proper installation.