In the Hefei Hongrui Jinling Grand Hotel project—a high-end, comprehensive architectural development—the piping system requires exceptional sealing, vibration isolation, and overall stability. As a critical component within the piping network, rubber expansion joints have played a vital role in ensuring the performance and reliability of the entire system, thanks to their excellent functional properties.
What Is a Rubber Expansion Joint?
A rubber expansion joint, also known as a flexible rubber joint, rubber soft connector, or rubber bellows, is a flexible connector used in piping systems to link equipment, absorb vibrations, and compensate for displacement. It mainly consists of a high-strength rubber body combined with metal flanges or threaded connections, offering outstanding flexibility and sealing performance.
Product Functions and Performance Advantages
In the HVAC system, domestic water supply, and wastewater pipelines of the Hefei Hongrui Jinling Grand Hotel, both flanged rubber joints and high-temperature rubber joints were used. These products offer the following functions and advantages:
-
Vibration and Noise Reduction: Rubber’s natural elasticity effectively absorbs water hammer shock and mechanical noise, enhancing guest comfort.
-
Displacement Compensation: These joints can compensate for axial, lateral, and angular displacement caused by thermal expansion, contraction, or installation deviations.
-
Corrosion and Pressure Resistance: Made from synthetic rubber resistant to oil, acid, alkali, and aging, they are suitable for complex fluid environments in hotel hot/cold water, steam, and air conditioning systems.
-
Easy Installation: With standardized flange interfaces, installation and maintenance are simple, reducing construction and operating costs.
Selection and Matching of Rubber Expansion Joint Types
According to the demands of different areas and functional modules in this project, various specifications and models were selected:
-
DN100–DN300 Single Sphere Rubber Expansion Joints: Used for connections between pumps and cooling towers to absorb vibrations.
-
Double Sphere Rubber Expansion Joints: Installed in the hotel’s underground utility corridors to enhance compensation capacity and extend pipeline service life.
-
High-Temperature Rubber Expansion Joints: Applied in the hot water piping system, capable of withstanding temperatures up to 120°C.
-
Rubber Expansion Joints with Limit Devices: Used to prevent excessive system stretching and ensure equipment operates safely.
Application Scenarios and Project Value
Rubber expansion joints are widely used not only in the hotel industry but also in commercial complexes, hospitals, office buildings, airports, and exhibition centers. They ensure stable operation of piping systems, reduce failure rates, and enhance service quality. As a “flexible core” of modern HVAC and plumbing systems, rubber joints are indispensable in today’s large-scale architectural projects.
Our company’s new website is now live, featuring the latest product introductions. For more details, please visit https://shsjflex.com
