The pressure vessel expansion joint is a device composed of one or several bellows and structural parts. It mainly uses bellows as the core flexible component of the expansion joint, which can be used for axial, lateral and angular compensation in the piping system. However, due to the restriction of the baffle and other accessories, the expansion joint can only be used as a shaft. Displacement and a small amount of lateral and angular displacement. Pay attention to the following aspects when selecting:
Choose the correct displacement in order to correctly select the expansion joint and choose the type of expansion joint;
Choosing the nominal pressure level is the key to giving full play to the role of the expansion joint. The choice of nominal pressure should be selected according to the actual operating pressure and operating temperature of the pipeline.
When selecting an expansion joint, the user should indicate the model specification, medium, working temperature, working pressure, compensation amount, connection type and size in the contract.
In order to ensure the life of the expansion joint, appropriately reducing the actual compensation amount can greatly extend its life.
When the compensation amount of the selected compensator is several times the actual expansion and contraction amount, it is often installed without pre-stretching.
The type of sliding support must ensure the expansion and energy-saving directional movement; the type of fixed support must ensure that it can withstand the stress in the pipeline.
Reasonably design and segment the pipeline, and determine the form and number of corrugated expansion joints used in each section;
Determine the working pressure level, calculate the compensation required for each section of the pipeline, and determine the rated compensation of each corrugated expansion joint;
Choose the type of corrugated expansion joint according to the diameter, pressure level and compensation amount.