Supply Shanxi Changzhi prestressed metal corrugated pipe manufacturer quotation Hengguang

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Prestressed metal corrugated pipe Henggang Rubber & Plastic specializes in the production of metal bellows, prestressed metal corrugated pipes. Customers are welcome to come and buy prestressed metal corrugated pipes. Flexible, thin-walled, transversely corrugated tube and shell parts. It has both elastic properties and sealing properties. It can produce axial, angular, lateral and combined displacements under the action of external forces and moments, and has good sealing performance. Materials for metal bellows in many industrial fields such as machinery, instrumentation, petroleum, chemical industry, electricity, heating, locomotives, ships, nuclear industry, aerospace, etc. The performance of metal bellows mainly depends on the quality of the material used to make the bellows and the quality of the bellows. Geometric parameters after forming. Whether the performance of bellows meets design requirements depends largely on the manufacturing quality of these materials. Material distortion, uneven welding, irregular waveforms and residual damage after forming can cause high stress in local parts, leading to premature destruction of the bellows. The selection of bellows materials should mainly consider the following points) Compatibility Metal bellows materials must be compatible with the working medium in contact and various connected parts. Because the wall thickness is very thin, it is easy to suffer from pitting corrosion and stress corrosion. And damage the integrity of the bellows. The cleaning medium and cleaning process must be carefully studied, because it is difficult to clean and inspect the corrugated areas in the bellows. ) Temperature The operating temperature range of metal bellows is (-~) ℃. The materials used for bellows operating at high temperatures must have sufficient thermal stability. As the operating temperature increases, the elastic modulus of the material decreases, resulting in a decrease in the stiffness, pressure resistance and fatigue life of the bellows. Bellows materials used at low temperatures must have good low temperature properties. At low temperatures, the brittleness of materials is very sensitive to surface defects. Therefore, the surface quality of materials should be strictly controlled. ) Service life and stress The pressure-bearing capacity of metal bellows is limited by the yield strength of the material, while the number of fatigue cycles is limited by the fatigue life and structural stability of the material. Bellows requiring long life should be designed to work within the elastic range, such as bellows used for instrument components and shaft seals. ) Manufacturing technology Various materials used to form corrugated pipes. It is required to have good plasticity and welding properties. Corrugated pipes with smaller diameters are usually made of seamless pipes, while bellows with larger diameters can be rounded with plates or strips and then longitudinally seam welded to form corrugated pipes.