What role does the bellows compensator play in the pipeline?

Dec 19, 2023
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Bellows compensator, also called expansion joint. It is composed of bellows (an elastic element) that constitutes its working body and accessories such as end tubes, brackets, flanges, and conduits. Belongs to a compensation component.

It utilizes the effective expansion and contraction deformation of the corrugated pipe of its working body to absorb the dimensional changes of pipelines, conduits, containers, etc. caused by thermal expansion and contraction, or to compensate for the axial, lateral and angular displacement of pipelines, conduits, containers, etc. It can also be used to reduce noise and vibration.

It is widely used in modern industry. In heating, in order to prevent the pipe from being deformed or damaged due to thermal elongation or temperature stress when the heating pipe heats up, a bellows compensator needs to be installed on the pipe to compensate for the thermal elongation of the pipe, thereby reducing the pipe wall. Stresses and forces acting on valve components or support structures.

Working principle of bellows compensator:

The working principle of the bellows compensator is to use its own elasticity to compensate for the axial, angular, lateral and combined displacement of the pipe caused by thermal deformation, mechanical deformation and various mechanical vibrations. It has pressure resistance, sealing, corrosion resistance, temperature resistance, impact resistance, vibration and noise reduction, reduces pipeline deformation, and improves the service life of the pipeline. The lateral expansion of the bellows is compensated by the elastic elements of the bellows and the axial expansion of the bellows.

The main elastic component of the corrugated compensator is the stainless steel bellows, which relies on the expansion, contraction and bending of the bellows to compensate the pipe in the axial, transverse and angular directions.

bellows compensator

The function of bellows compensator:

Bellows compensator is mainly used to adjust installation errors. During the installation and production process of pipelines, axial and radial dimensional errors and shape errors will inevitably occur. At this time, bellows should be used to adjust to expand the connection. After the connection is completed, make sure the connection is smooth. The bellows is temperature compensated. The product also acts as a compensation to prevent the bellows from overheating. Bellows compensators can also absorb axial, longitudinal and angular offsets.

1. Compensate the axial, lateral and angular thermal deformation of the absorption tube.

2. Equipment vibration, reducing the impact of equipment vibration on the pipeline.

3. Absorb the deformation of pipelines caused by earthquakes and settlements.

Compensators can be divided into unconstrained corrugated compensators and constrained compensators according to whether they can absorb the pressure thrust generated by the medium pressure in the pipeline. According to the displacement form of the bellows, they can be divided into axial compensators and transverse compensators. Type compensators, angle compensators, pressure balance bellows compensators, and non-metallic expansion joints have good overall performance and have been widely used in many engineering fields.

In piping systems, if there are thermal stresses caused by temperature changes, local vibrations caused by vibrations of equipment and fixed supports, and stresses caused by system installation deviations, the connection method will inevitably lead to the weakest piping system. Deformed or damaged. This damage can be avoided if flexible, non-metallic compensators are used. This is related to the unique movement form of non-metallic compensators. These forms of motion determine the multi-dimensional displacement performance of the non-metallic compensator.

How to choose bellows compensator:

1. After the user selects a suitable bellows compensator based on the thermal displacement of the piping system, he must at least provide the circulating medium in the pipe, the design pressure of the flue duct, the maximum temperature during operation, and the overall dimensions of the cross section of the flue duct. The selected waveform and wave number (the wave number of a single corrugation does not exceed 6 waves) are used to facilitate the structural design and manufacturing of the bellows compensator.

2. Dust-proof board: It is not necessary to use the dust-proof board for air ducts or ducts with little dust. Dust-proof boards should be used for dusty flues.

bellows compensator

Reasons for choosing wesdom bellows compensator:

Installation error:

During the pipeline connection process, system errors are inevitable, and wesdom stainless steel metal bellows compensators can well compensate for these installation errors.

Noise reduction and vibration reduction:

Since stainless steel itself has good sound absorption and vibration isolation transmission functions, it can effectively reduce the noise and vibration of boilers, fans and other systems.

High temperature resistance and corrosion resistance of stainless steel metal bellows compensator:

The use of fluoroplastic and silicone materials makes the stainless steel metal bellows compensator have excellent high temperature resistance and corrosion resistance.

Excellent sealing performance:

Through comparison of production and assembly systems, wesdom stainless steel metal bellows compensator can achieve leak-free results and has good sealing performance.

Reasons for leakage of bellows compensator

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