The application of pipeline expansion joint and double-flange dismantling joints in industry is mainly reflected in their different functions and application scenarios in the pipeline system.

      Ⅰ. Application of pipeline expansion joint
      The pipeline expansion joint is mainly used to absorb the displacement of the pipeline due to thermal expansion and contraction or other factors, and maintain the stability and safety of the pipeline system. They compensate for the displacement of the pipeline, reduce the vibration of the pipeline, protect the normal operation of the pipeline, and prevent the leakage of the medium. The pipeline expansion joint is suitable for various piping systems, including long-distance pipelines, transportation pipelines, water supply and drainage pipelines, and industrial pipelines. The specific types include gland loose sleeve limit expansion joints, single flange limit expansion joints, double flange limit expansion joints and flanged loose sleeve expansion joints.

      Ⅱ. Application of double flange force transmission joints
      The double flange dismantling joint is mainly used to transmit the axial force of the pipeline, and is suitable for occasions that need to withstand large axial forces. They are tightly connected by two symmetrical flanges and bolts, and are simple in structure and suitable for applications where adjacent metal pipes have the same diameter. Double flange power transmission joints are widely used in petrochemical, papermaking, food and other industrial fields, which can transmit pressure and improve the overall stability of the pipeline system.

      Ⅲ. Specific application scenarios and advantages and disadvantages
      · pipeline expansion joint: Suitable for occasions that need to compensate for displacement, such as long-distance pipelines, transportation pipelines, water supply and drainage pipelines and industrial pipelines. Benefits include absorbing displacements, reducing vibrations, protecting the normal operation of the pipeline, and adapting to different media, temperature and pressure conditions. The disadvantage is that the structure is complex and the price is higher.
      · Double flange power transmission joint: Suitable for occasions with the same diameter of adjacent metal pipes, such as petrochemical, papermaking, food and other industrial fields. The advantage is that the structure is simple and the price is low, and the disadvantage is that the application scenarios are limited, and it is not suitable for pipes with inconsistent diameters.