the pipe repair coupling can be axially expanded and contracted within a certain range, and can also overcome the offset caused by the connection of pipes in different axial directions within a certain angle, which can greatly facilitate the installation and disassembly of valve pipes. free expansion and contraction, once it exceeds its specified expansion and contraction amount, it will play a limit to ensure the safe operation of the pipeline. the expansion joint is mainly to ensure the safe operation of the pipeline, and has the following functions: compensating and absorbing the axial, lateral and angular thermal deformation of the pipeline; absorbing equipment vibration and reducing the impact of equipment vibration on the pipeline; absorbing the deformation of the pipeline from earthquakes and subsidence.

an important requirement for pipeline production is anti-corrosion. manufacturers have done anti-corrosion treatment during production. however, in practical applications, users should also take some simple anti-corrosion measures, which can increase the life of the product.
pipe repair coupling will be subject to strong corrosion during use, especially in chemical applications. therefore, in addition to daily anti-corrosion treatment, some new measures can be taken during use. because it is used too much in engineering, many construction workers will add some relatively simple copper pipes to the outside of the pipe repair coupling, which is a good treatment method, which can protect the pipe repair coupling from being eroded.
when the pipe repair coupling leaves the factory, the manufacturer provides some basic parameters and service life, but it adopts some simple methods within its ability when using it, which is not only concise but also has a better protective effect.