Expansion joints, also known as expansion joints, expansion joints, compensators, expansion joints. Divided by expansion joints Material: steel expansion joints, rubber expansion joints, stainless steel expansion joints. Expansion joints within a certain range of axial stretching, can overcome the pipe butt different axial offsets generated within a certain angle, can greatly facilitate the installation and removal of the pipeline valve in the pipe to allow expansion volume can be freely stretching, once the largest amount of stretching it over its limit play to ensure the safe operation of the pipeline. Primarily for the protection of the safe operation of the pipeline, has the following effects: Compensation absorb pipeline axial, lateral and angular thermal deformation; deformation of the pipeline to absorb earthquake, subsidence; absorb vibration equipment, reducing equipment vibration impact of the pipeline. 1 The products for a variety of water supply and drainage, water towers, water pumps, water meters, installation of removable valve provides a great convenience for long-distance pipeline stretching due to temperature regulation played a very good role. (2) The product pipe can be divided into two types: metal type and rubber type, metal type and made of cast iron, galvanized and steel three. Working pressure PN6, PN10, PN16 three. Sleeve-type expansion joints (2) 3. Before installation shall release the pressure plate bolts to pull the product installation length, and then tighten the diagonal method, not the pressure side, such as overhead use, to be installed at both ends of the corresponding mounting bracket. 4 flange connection using GB4216.3 - 4126.5 standard. [5] The use of other specifications can be customized production. When installing expansion joints to adjust the length of the product is installed at both ends or flanges, diagonal evenly tighten the gland nut, nut and then adjust the limit, so you can make the amount of piping within the scope of freedom telescopic retractable, locking telescopic volume, ensure safe operation of the pipeline. Primarily for the protection of the safe operation of the pipeline, has the following effects: Compensation absorb pipeline axial, lateral and angular thermal deformation; deformation of the pipeline to absorb earthquake, subsidence; absorb vibration equipment, reducing equipment vibration impact of the pipeline. Expansion joints is a new product pumps, valves, piping and other equipment and pipe connections, through its wholly-bolts to connect them to become whole, and there is a certain amount of displacement, easy installation. Can withstand axial pressure pipeline. This can be in the installation and maintenance, according to the site installation size adjustment, at work, not only improve efficiency, but also for pumps, valves, piping and other equipment they play a protective role.