Fabric Expansion Joint: A high-temperature anti-corrosion solution with non-metallic flexible compensation
Fabric expansion joint, also known as fiber compensator, non-metallic expansion joint, and rectangular fabric fiber expansion joint, is a key component in pipeline systems that combines flexible compensation with corrosion and high-temperature resistance. It can achieve displacement compensation in the axial, lateral and angular directions. With advantages such as no thrust, simplified support design, corrosion resistance, high-temperature resistance, sound absorption and shock absorption, it performs outstandingly in scenarios such as hot air ducts and flue ducts.
Rubber Expansion Joint,
Bellow Expansion Joint,
Flexible Metal Hose, Dismantling Joint , Flange Adaptor ,
Duckbill Check Valve and other accessories work in coordination to build a pipeline safety guarantee network under various working conditions.
Core performance: The "non-metallic advantage" of flexible compensation
The multi-directional compensation capability of Fabric expansion joint makes it stand out in complex pipeline systems. It can simultaneously compensate for axial, lateral and angular displacements. This "all-round flexibility" feature complements the elastic compensation function of Rubber Expansion Joint - the former is good at dealing with large-sized displacements in high-temperature flue ducts, while the latter has more advantages in vibration absorption of normal-temperature pipelines. In the boiler flue and air duct system, the fabric Expansion energy-saving compensation for the lateral offset of the pipeline caused by temperature changes, combined with the axial compensation of the Bellow Expansion Joint, the two are precisely connected through the Flange Adaptor, comprehensively resolving the stress risk brought by the thermal expansion and contraction of the pipeline.
The thrust-free design is the "finishing touch" of Fabric expansion joint in simplifying pipe support. Compared with metal compensators, it does not generate blind plate force and significantly reduces the design strength requirements of pipe supports. This advantage is particularly evident in large hot air ducts. When installed, it is used in conjunction with Dismantling Joint, which not only facilitates later maintenance and replacement, but also reduces the construction cost of the support. Its lightweight feature echoes the lightweight and easy-to-install characteristics of the Flexible Metal Hose , jointly improving the construction efficiency of the pipeline system.
The high-temperature resistance and corrosion resistance properties make Fabric expansion joint the "anti-corrosion pioneer" in harsh environments. It is composed of special fiber fabric and coating, which can resist the long-term erosion of high-temperature flue gas and acid and alkali corrosive media. This performance is consistent with the material selection logic of Duckbill Check Valve 's corrosion-resistant seals. In the flue gas duct of waste incineration power generation, it can withstand the corrosive components in the flue gas and form a protective relay with the corrosion-resistant Rubber material of Rubber Expansion Joint in different temperature ranges. The former guards the high-temperature section, and the latter guarantees the normal temperature connection section.
Scene Adaptation: The "Flexible Guardian" of High-temperature Pipelines
The application of Fabric expansion joint in hot air ducts and flue ducts can be described as "tailor-made". In the hot blast stove pipeline of the metallurgical industry, it can compensate for the thermal displacement of the pipeline. The sound absorption and vibration reduction characteristics can reduce the airflow noise. Combined with the vibration absorption function of Rubber Expansion Joint at the fan outlet, it forms a full-chain noise reduction solution of "high-temperature compensation + low-temperature vibration reduction". Its rectangular structure design is particularly suitable for large rectangular flue and air ducts. It is connected to the Pipe Flange through Flange Adaptor to ensure the sealing performance of high-temperature flue gas transportation.
In the waste gas treatment pipelines of the chemical industry, the corrosion resistance advantage of Fabric expansion joint is fully exerted. It connects exhaust gas pipes of different specifications and cooperates with the corrosion-resistant branch pipes of Flexible Metal Hose to achieve the diversion treatment of exhaust gas. Meanwhile, its flexible characteristics can absorb the vibration generated by the operation of the fan. Combined with Dismantling Joint, it is convenient for regular maintenance and inspection to ensure the long-term stable operation of the exhaust gas treatment system.
Compared with Bellow Expansion Joint, Fabric expansion joint is more cost-effective in low-temperature corrosive environments. In the tail flue of coal-fired boilers, low-temperature flue gas is prone to corrosion. The expansion energy-saving of non-metallic materials effectively resist corrosion erosion. Its maintenance cost is much lower than that of metal compensators. The application logic of Duckbill Check Valve in the corrosion resistance of sewage pipes is the same, both reducing operation and maintenance losses through material properties.
System Collaboration: "Efficiency Upgrade" through Multi-Component Linkage
The functionality of the Fabric expansion joint is maximized in coordination with other accessories. In the flue gas and air system of thermal power plants, it is combined in sections with
Bellow Expansion Joints. In the high-temperature section, fabric expansion joints are used to compensate for large displacements, and in the normal temperature section, metal bellows are used to compensate for small displacements. The two are sealed and connected through Flange adaptors. The Flexible Metal Hose connects the measuring instrument to the main pipeline and ADAPTS to pipeline vibration to ensure accurate monitoring.
In the incineration flue gas pipeline of municipal waste treatment, Fabric expansion joint connects the incinerator and the purification equipment. While compensating for the thermal displacement of the pipeline, its corrosion resistance property forms a protective combination with the corrosion-resistant Rubber material of Rubber Expansion Joint. The addition of Dismantling Joint facilitates pipeline ash cleaning and expansion joint replacement, ensuring the continuous operation of the flue gas purification system.
In the hot air duct of the drying equipment, the lightweight and flexible characteristics of the Fabric expansion joint simplify the installation process. It quickly connects with the Flange Adaptor, cooperates with the Duckbill Check Valve to prevent the backflow of hot air, and the Flexible Metal Hose is connected to the hot air branch pipe to achieve precise distribution of hot air. The three work together to enhance the operational stability of the drying equipment.
Performance Extension: The "Added Value" of Sound Absorption and Shock Absorption
The sound absorption and shock absorption characteristics of Fabric expansion joint add points to the environmentally friendly operation of the pipeline system. The fiber fabric layer can effectively absorb air flow noise and reduce noise pollution in the pipeline system. This advantage is particularly important in the thermal pipelines near residential areas. Combined with the shock absorption and noise reduction functions of Rubber Expansion Joint, the former weakens the noise of high-temperature gas flow, and the latter absorbs the vibration transmission of equipment. The two form a "double noise reduction barrier" in the external heating pipeline of the thermal power plant, enhancing the comfort of the surrounding environment.
This sound absorption property complements the shock absorption function of the Flexible Metal Hose. In the outlet pipeline of the fan, fabric expansion joints reduce the noise of airflow turbulence, metal hoses absorb the vibration of the fan, and Flange adaptors ensure the sealing of the connection. Together, they create a low-noise pipeline operation environment that meets the environmental protection requirements of modern industry.
With the unique advantages of non-metallic materials, Fabric expansion joint has set a new benchmark for flexible compensation in high-temperature, corrosive and large-displacement pipeline systems. It, along with accessories such as Rubber Expansion Joint and Bellow Expansion Joint, performs their respective functions in different working conditions. Through the precise connection of Flange Adaptor, the convenient maintenance of Dismantling Joint, and the anti-backflow guarantee of Duckbill Check Valve, we provide safe, efficient and economical compensation solutions for special pipeline systems such as hot air and flue gas. Become a "non-metallic backbone force" in the field of flexible connections for industrial pipelines.
3. Sound absorption and seismic isolation: Fiber fabrics and thermal insulation cotton themselves have sound absorption and seismic isolation functions, which can effectively reduce the noise and vibration of boilers, fans and other systems.
4. No reverse thrust: Because the main material is fiber plants, there is no power transmission. Using fiber compensators can simplify the design, avoid the use of large supports, and save a lot of materials and labor.
5. Good high temperature resistance and corrosion resistance: The fluoroplastic and silicone materials used have good high temperature resistance and corrosion resistance.
6. Good sealing: There is a relatively complete production and assembly system, and the fiber compensator is basically leak-free.
7. Lightweight, simple structure, easy installation and maintenance.
8. The price is lower than that of metal compensators, and the quality is better than imported products. The price is 1/2-1/5 of imported products
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