Expansion joints, also known as expansion joints, expansion joint, compensator. Expansion joints within a certain range of axial stretching, but also within a certain angle in the butt to overcome the pipeline resulting from the different axial offset, can greatly facilitate the installation and removal of the valve pipe, the pipe can be allowed to stretch the amount of free expansion, once the largest expansion of its capacity over the limit to play a role in ensuring the safe operation of pipelines. Expansion joints within a certain range of axial stretching, but also within a certain angle in the butt to overcome the pipeline resulting from the different axial offset, can greatly facilitate the installation and removal of the valve pipe, the pipe can be allowed to stretch the amount of free expansion, once across the stretching capacity to serve the maximum limit, to ensure the safe operation of pipelines. Mainly for the protection of the safe operation of pipelines, has the following effect: compensation absorption pipe axial, lateral, angular thermal deformation; absorbing equipment vibration, reducing equipment vibration of the impact of the pipeline; absorb the earthquake, subsidence deformation of the pipeline. 
 1. The product is all to the sewer, water towers, water pumps, water meters, installation of removable valve provides a great convenience to the long-distance pipeline due to temperature expansion played a very good regulation. 
 2. The product is divided into the cast iron pipe (HT), zinc (DX) and steel (SF) Three. Working pressure points PN6, PN10, PN16 three. 
 3. Shall release the pressure plate before installing bolts, pull the product to the installation length, and then tighten the diagonal method, do not press bias, such as overhead use, both ends have to install the appropriate mounting bracket. 
 4. Flange connection with GB4216.3 - 4126.5 standard. 
 5. Such as the use of other specifications may be produced. 
 Expansion joints connection: 
 Flange connection, welding two, Buried expansion joints (non-trench, located wells installed) commonly used welding. 

 Use: 
 The expansion joints with a good overall performance, it is widely used in chemical, construction, water supply, drainage, oil, light and heavy industries, frozen, health, plumbing, fire, electricity and other infrastructure projects.