Compensators, also known as expansion joints or expansion devices, play a crucial role in various industries, helping to accommodate the movement and displacement of pipelines, pumps, and valves. Proper installation and considerations are essential when using compensators. Let's delve into the details:
1. Checking Specifications: Before installation, it's crucial to verify that the compensator's model, specifications, and configuration align with the design requirements.
2. Orientation: For an inner sleeve compensator, ensure that the orientation of the inner sleeve matches the direction of media flow. In the case of a hinged compensator, the rotation plane of the hinge should be aligned with the displacement rotation plane.
3. Pre-Deformation: When installing the pipeline, auxiliary components used for pre-deformation of the compensator should be removed. While compensators can accommodate deformation, they should not be used to adjust for installation errors, as this can affect their normal functionality and shorten their lifespan.
4. Welding Considerations: During installation, be mindful of welding slag splatter on the compensator's surface. The bellows casing should not be damaged by other mechanical components during the installation process.
5. Removal of Auxiliary Positioning Parts: After the pipeline system is installed, the yellow auxiliary positioning parts and fasteners on the compensator should be removed, and the limiting device should be adjusted to the specified position as per the design requirements.
6. Functionality Check: Ensure that all movable components of the compensator are not obstructed or restricted by external parts, and verify the normal operation of each movable part.
7. Water Pressure Test: For gas media and their connecting lines, during water pressure testing, consider whether temporary support is needed, and ensure that the chloride ion content in the clean water liquid used for the hydrostatic test does not exceed 25 ppm.
In the process of heat transmission, thermal expansion occurs over time. To eliminate the adverse effects of thermal stress on pipelines due to thermal expansion and contraction, compensators have been developed. These compensators can mitigate the impact of thermal stress on the pipeline, allowing for thermal expansion and contraction without causing damage.
In indoor heating systems, pipelines require support and fixation by brackets, and compensators are no exception. According to the function of brackets in the pipeline, they can be divided into different types:
Active Supports: These are used to distribute and support all loads, such as the pipeline, heat medium, insulation material, pipe fittings, or valves, evenly on the pipeline. They also allow the pipeline to move freely on the support.
Fixed Supports: Fixed supports are used to secure compensators at appropriate locations. They can withstand the horizontal thrust caused by thermal expansion of the pipeline. When installing compensators to compensate for the thermal expansion of pipeline sections, it's essential to fix both ends of the section that the compensator is addressing. This is done to evenly distribute the thermal elongation of the pipeline between the compensators.
Guide Supports: Guide supports ensure that the pipeline slides along the same axis to prevent displacement. Therefore, in pipelines where expansion joints or bellows compensators are not required, guide supports are typically used to maintain the pipeline in the same axial position. These supports help keep the pipeline from moving during operation.
