Differences between bellow expansion joints and flexible metal hoses


Our company(Shandong Hesper Rubber Plastic, Co., Ltd.) produce and supply bellow expansion joint(belong to our metal expansion joints) and flexible metal hoses(belong to our metal hoses). Both corrugated Expansion joints and flexible metal hoses are pipeline fittings as the core components, which be used to transport various fluids with corrugated pipes . Their working nature is to compensate for the connection between pipes and pipes, pipes and equipment, equipment and equipment. Therefore, people tend to confuse bellow expansion joints with flexible metal hoses(mainly stainless steel metal hoses). In fact, there are some differences in how they work.

The outer surface of the bellow expansion joints has no metal wire or metal belt braided mesh sleeve,it’s equipped with restraining devices such as tie rods, hinges, and reinforcing rings, and is an annular corrugated pipe assembly with a ratio of less than 3. In general, the bellow expansion joint uses its axial expansion or angular change ratio to compensate for the position movement of the piping system which due to temperature difference, to absorb the vibration of the equipment when it is turned on, stopped or under normal operating conditions.

The bellow expansion joints also called corrugated expansion joints and corrugated compensators. It is mainly used to ensure the safe operation of the pipeline, has a cylindrical thin-walled corrugated shell with multiple transverse corrugations, has displacement under the action of bending moment. Our bellow expansion joints’ working principle is mainly to use its own elastic deformation function to compensate the axial, angular, lateral and combined displacements of the pipeline due to thermal deformation, mechanical deformation and various mechanical vibrations. The functions of corrosion, temperature resistance, impact resistance, vibration reduction and noise reduction can reduce the deformation of the pipeline and improve the service life of the pipeline.

Our flexible metal hose mainly refers to a spiral corrugated pipe, which is a flexible pressure-resistant pipe fitting installed in a liquid conveying system,can compensate the mutual displacement of the connecting ends of pipes or machines and equipment, absorb vibration energy, and reduce vibration. It has the characteristics of good flexibility, light weight, corrosion resistance, fatigue resistance, high and low temperature resistance, flexible pitch, good flexibility, no blocking and stiffness.

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Post time: Apr-27-2022