Products are widely used in different fields such as petroleum, chemical, electric power,
refrigeration, food, medicine, etc.
Expansion joint refers to the connection method of expanding the tube to the tube sheet by expanding the tube with the expander according to the characteristic of plastic deformation of the metal. It is mostly used for the connection of tube bundles to tube sheets. The working process is: inserting the expansion rod into the pipe head, and applying pressure to plastically deform the pipe wall until it completely fits on the pipe plate, and deforms around the hole wall of the pipe plate, and then pulls out the expansion rod. Since the tube is plastically deformed, and the tube sheet is still in an elastic deformation state, the enlarged tube diameter cannot be reduced, and the tube sheet hole wall is elastically restored to make the hole diameter smaller (recover), thus making the tube and the tube The tube sheets are tightly fitted together. The tube is plastically deformed by an external force, and the tube is connected to the tube sheet, which is also called a tube. At present, hydraulic expansion is often used.