A double-flanged expansion joint (Flexible Joint) is an expansion device with two flange connections. It mainly consists of flanges, an expansion tube, a limiting device, and seals. Its core function is to absorb axial displacement of the pipeline caused by temperature changes, mechanical vibration, or foundation settlement, thereby preventing damage to the pipeline due to excessive stress.
Working Principle of Double-Flanged Flexible Joints
The working principle of a double-flange flexible joint is that when a pipeline shifts due to temperature changes or other external forces, the expansion joint absorbs this displacement through its internal expansion tube and sealing components, thereby reducing the direct impact on the pipeline.
When the pipeline experiences axial displacement due to thermal expansion and contraction, the expansion tube can freely expand and contract within allowable limits, preventing the pipeline from cracking due to stress concentration. The external limiting rod device of the double-flange flexible joint ensures that the joint operates within allowable limits, preventing equipment failure or pipeline detachment due to excessive displacement.
Main Functions of Double-Flanged Flexible Joints
Reducing Pipeline Stress: By absorbing displacement, the expansion joint effectively reduces the stress caused by thermal expansion, contraction, or vibration in the pipeline, extending the service life of the pipeline system.
Improving System Stability: In complex industrial environments, double-flange flexible joints can maintain stable pipeline connections, preventing leakage or breakage caused by displacement.
Simplifying Installation and Maintenance: The double-flange design makes installation easier and facilitates future maintenance and replacement. Adaptable to various working conditions: Whether it's high temperature, high pressure, or corrosive media, double-flange limiting expansion joints can adapt to different working conditions through material selection and design.
Application Scenarios of Double-Flanged Limiting Expansion Joints
Double-flange limiting expansion joints are widely used in petrochemical, power, heating, and water supply industries. For example:
In heating pipelines, they can effectively absorb thermal expansion and contraction caused by temperature changes;
In petrochemical pipelines, they can reduce stress caused by medium pressure fluctuations or mechanical vibrations;
In water supply systems, they can cope with damage to pipelines caused by foundation settlement or natural disasters such as earthquakes.
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