Principle of operation: After the loose sleeve expansion joint is installed on the pipeline, the nut is tightened and the elastic seal is tightly pressed on the outer ring of the pipe under the action of the nut and gland, relying on the mutual slope to seal and connect the role. When the temperature changes, the pipe is free to expand and contract in the middle of the joint, and when the foundation sinks, the pipe can be deflected, and ensure the seal without leakage, thus playing the purpose of automatic compensation. It is suitable for connecting with flange on one side and welding with pipeline on the other side. The installation is to adjust the installation length of both ends of the product and the pipe or flange. After installation and welding, the gland bolts are evenly tightened diagonally at one time, so that it becomes one and has a certain displacement, which is convenient to adjust according to the site size during installation and maintenance. When working, the axial thrust can be transferred to the whole pipeline.
