The Function and Selection Tips for Expansion Joints

Release time:

2021-05-11

The compensator is also known as... Expansion joint Or expansion joints, composed of components such as bellows, end pipes, supports, flanges, and guide tubes, are classified as compensating elements. By utilizing the expansion and contraction deformation of the bellows, these joints can absorb dimensional changes in conduits, pipelines, vessels, and other similar structures—whether caused by thermal expansion and contraction or designed to compensate for lateral, axial, and angular displacements in conduits, pipelines, vessels, and the like. They can also be used to reduce noise and vibration, making them widely applicable in modern industry.

The Function and Selection Tips for Expansion Joints

In heating systems, to prevent deformation or damage to heating pipelines caused by thermal stresses or thermal expansion, reduce stress on pipe walls, and minimize the forces acting on valve components or support structures, expansion joints must be installed along the pipelines to accommodate thermal expansion.

Expansion joint Functions: 1. Compensates for and absorbs axial, lateral, and angular thermal and cold deformations in pipelines. 2. The expansion capacity of the bellows compensator facilitates the installation and removal of valve pipelines. 3. Absorbs equipment vibrations, reducing the impact of equipment vibration on pipelines. 4. Absorbs pipeline deformations caused by earthquakes and ground settlement.

Expansion joint selection tips: The compensator adopts a rectangular cross-section and a circular corrugated shape, with a single unit inside the pipeline. Expansion joint By accommodating two-dimensional displacement, an elbow pipe composed of two expansion joints can handle three-dimensional displacement. Rectangular and circular metal bellows expansion joints are available in both full-height and half-height versions. Users can select multi-segment designs based on flue gas duct dimensions and stress-strain requirements. 1. After selecting the appropriate compensator according to the thermal displacement of the piping system, users must provide at least the following information for the structural design and fabrication of the compensator: the circulating medium within the pipeline, the design pressure of the flue gas duct, the operating temperature, as well as the waveform and number of corrugations selected for the flue gas duct cross-section. 2. Ash-blocking plates: Wind ducts or pipelines with low dust levels should not use ash-blocking plates; however, flue gas ducts with high dust concentrations must be equipped with ash-blocking plates. 3. To reduce the number of nodes in the bellows, a cold drawing of 50% should be considered. 4. Expansion joints are suitable for applications where the cross-sectional area is less than 4.6 square meters and the flue gas duct’s external dimensions on one side are between 0.6 mm and 1.5 meters. Standard... Expansion joint Suitable for all flue and air ducts.

Due to the rather complex nature of various constraints, any intricate piping system can be divided into several relatively simple single-pipe segments—such as “Z”-shaped segments and “U”-shaped segments—by selecting a few fixed supports at different locations. The deformation and compensation amounts for each segment can then be determined separately. Since... Expansion joint There are many different types available, and it is crucial to select the right type correctly; therefore, this should be fully considered during the overall design of the piping system.

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