In the high-end, multi-functional architecture of the Hefei Hongrui Jinling Hotel, the piping system demands exceptional levels of sealing, vibration control, and structural stability. As a critical component of such systems, rubber expansion joints demonstrate outstanding performance and play a vital role in ensuring the safe and efficient operation of mechanical and HVAC infrastructure throughout the facility.
What Is a Rubber Expansion Joint?
A rubber expansion joint—also known as a flexible rubber connector or rubber bellows—is a flexible element used in piping systems to connect equipment, absorb vibration, and compensate for movement. It typically comprises a high-strength rubber body and metallic flanges or threaded connectors. These joints offer excellent flexibility, elasticity, and sealing capabilities, making them indispensable in fluid transport and HVAC systems.
Product Functions and Performance Advantages
In the chilled and heated water systems, domestic water supply lines, and drainage pipelines of the Hefei Hongrui Jinling Hotel, both flanged and high-temperature-resistant rubber expansion joints were deployed, providing the following key advantages:
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Vibration and Noise Reduction: The natural elasticity of rubber effectively absorbs water hammer and mechanical vibrations, improving the overall comfort and quietness of guest environments.
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Movement Compensation: These joints accommodate axial, lateral, and angular displacements caused by thermal expansion, contraction, or installation misalignments.
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Resistance to Corrosion and Pressure: Made from synthetic rubber materials with excellent resistance to oil, acid, alkali, and aging, they are well-suited for complex media including hot/cold water, steam, and HVAC refrigerants.
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Ease of Installation and Maintenance: With standardized flange connections, these joints are easy to install and maintain, reducing both construction and operational costs.
Product Selection and Customization for Project Needs
Based on the specific requirements of different areas within the hotel, the following types and specifications of rubber joints were selected:
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DN100–DN300 Single-Sphere Rubber Joints: Installed between water pumps and cooling towers to absorb mechanical vibrations.
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Double-Sphere Rubber Joints: Positioned in the hotel’s underground utility corridors to enhance displacement absorption and extend the service life of piping systems.
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High-Temperature Rubber Joints: Applied in hot water pipeline systems, withstanding temperatures up to 120°C.
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Rubber Joints with Limiting Devices: Prevent overextension in abnormal operating conditions, protecting system integrity and equipment safety.
Application Scenarios and Project Significance
Rubber expansion joints are widely used not only in the hospitality industry but also in large-scale commercial complexes, hospitals, office buildings, airports, and convention centers. They contribute to the stability of piping networks, reduce system failures, and enhance overall service quality. As such, they are considered a “flexible core” of modern HVAC and plumbing systems in contemporary architecture.
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