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Let me introduce the main functions of bellows expansion joints.
Release time:
May 25,2022
A bellows compensator is a type of compensation element that utilizes the elastic deformation of the corrugated tube itself to absorb dimensional changes in pipelines, conduits, and vessels caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements in these components. Bellows compensators are primarily used for noise reduction and vibration damping and have a wide range of applications in modern industry.
A bellows compensator is a type of compensation element that utilizes the flexible deformation of its main bellows tube to absorb dimensional changes in pipelines, conduits, and vessels caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements in these components. Bellows compensators are primarily used for noise reduction and vibration damping and have a wide range of applications in modern industry.
A bellows compensator, commonly referred to as an expansion joint or flexible joint, consists of a bellows—the primary working element (an elastic component)—as well as end pipes, supports, flanges, guide tubes, and other accessories. It is primarily used in various piping systems to compensate for thermal expansion and contraction of pipelines, absorb mechanical deformations, and mitigate various types of mechanical vibrations. As a result, it helps reduce deformation stresses in pipelines and significantly extends their service life.
The connection methods for bellows expansion joints are divided into two types: flanged connections and welding. For directly buried pipelines, welding is generally used (with trench-mounted equipment located externally). The working principle of a bellows expansion joint is that it uses the elastic deformation of its flexible element to absorb dimensional changes in pipelines, conduits, or vessels caused by thermal expansion and contraction, making it a type of compensating component. It can absorb axial, lateral, and angular displacements.
Since different types of bellows compensators employ different compensation methods, the main ones include axial, lateral, angular, and combined compensation approaches. For bellows compensators that experience multiple displacements simultaneously, it is necessary to synthesize these various displacements to determine the total equivalent axial displacement; the inspection is conducted with respect to this total equivalent axial displacement. In other words, the nominal displacement measurement for a bellows compensator refers to the measurement of the total equivalent axial displacement.
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