Both expansion joints and expansion joints are elements used to compensate the expansion and contraction deformation of pipes caused by factors such as temperature, vibration or displacement in pipeline systems, but they have some differences in structure, characteristics and use scenarios.
Expansion joint is a connecting device that can extend and contract freely, and is widely used in various pipelines, machinery, structures and other fields. It can be displaced and compensated in axial, radial or angular directions, acting as a connection, support and shock absorption. The telescopic joint is mainly composed of two main parts: telescopic sleeve and fixed sleeve. The telescopic sleeve is used for displacement and compensation, usually made of corrosion-resistant materials, while the fixed sleeve is used to connect pipelines or mechanical structures, playing the role of support and fixation. In addition, the expansion joint may also contain structural features such as check valves, safety valves, guide mounts, etc. to improve its performance and safety.
The expansion joint is a kind of flexible element, which can effectively compensate the axial deformation. It is mainly used to compensate the additional stress caused by the temperature difference and mechanical vibration of the pipeline, and is arranged on the container shell or pipeline. The structure of the expansion joint includes bellows (an elastic element) and accessories such as end tubes, brackets, flanges, conduits, etc. It is usually used in high temperature and high pressure pipeline systems such as petrochemical, paper, steel, power generation and other pipeline systems with large vibration, and can effectively absorb the impact, vibration and deformation of pipeline.
Overall, there are obvious differences between expansion joints and expansion joints in structure, characteristics and use scenarios. Expansion joints focus more on the functions of connection, support and shock absorption, and are suitable for various pipelines, machinery, structures and other fields, while expansion joints focus more on compensating the axial deformation of pipelines caused by temperature, vibration and other factors, and are usually used in pipeline systems with high temperature, high pressure and large vibration.