Pipeline in use process will appear the phenomenon of thermal expansion and contraction, this time we have to consider the installation of some parts of the joint to compensate the displacement.
Under normal circumstances, if the pressure is relatively small,the installation environment is not too bad,is the installation of rubber joints, but in the face of large pipes,The pressure of the medium is very large,it is to consider the installation of double flange joint. First, it is the metal material,can withstand the pressure than the rubber material of the joints.Second the inner sealing ring of the telescopic joint can achieve a good static seal in the working time, the premise is to ensure that the normal compensation of the displacement of the pipeline Case. Pipe into the use of the pipe, the pipe line of the blind plate thrust or is near the vibration of the valve is very obvious, coupled with a double flange joint, can be very good to reduce these negative factors on the pipeline. When the medium flow to the pipe bend, the flow direction is changed, but in the inertia of the drive Will have a thrust to the inner wall of the pipeline, thus thrust caused by the vibration of the pipeline, when the vibration transmitted to the expansion joint, because the sealing ring is made of rubber material, flexibility is good, so it can reduce the vibration transmission. Valve on the top of the installation of dual - hair to limit the expansion joints because and he is the same. In this way will sometimes see installation is the mass of the joint force, its role is to near the source of the vibration is better spread to the entire pipeline. At that time, some people will ask, the expansion joint is in order to avoid vibration transmission, the transmission of the joints in order to facilitate vibration transmission, which is not a bit contradictory.
In fact, it is not contradictory why. Why do this, one is based on the material of the pipeline, some of the pipeline can withstand a certain vibration, some of the pipeline is not. Two is the force of the joints and joints and joints collocation use the effect will be better.
