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Possible causes of failure of bellows compensator

Author: Huatai Hydraulic Source: creapax.com Time: 2012-2-10 Views: Baidu
Fatigue life design According to the failure type and cause analysis of the corrugated tube compensator, it can be seen that the planar stability, circumferential stability and corrosion resistance of the corrugated tube are related to its displacement, which is the fatigue life. Too low fatigue life will lead to reduced stability and corrosion resistance of the bellows. According to the test and use experience, the fatigue life of the bellows used in heating projects should not be less than 1,000 times.
The bellows cannot bear the load and should be hoisted separately. Except for the pre-stretched or cold-tightened pre-deformation, the deformation of the bellows is strictly prohibited to adjust the installation deviation of the pipe; the welding process is not allowed to splash the welding slag on the surface of the bellows. And other mechanical damage; all moving elements of the bellows must not be stuck by external components or restrict their normal working.
Most of the failures of corrugated pipes are caused by the corrosion of the external environment, so when designing the structure of the compensator, it can be considered to isolate the contact between the external corrosive medium and the corrugated pipes. For the external pressure axial type compensator, a packing sealing device can be added between the outlet end ring and the outlet pipe. Its function is equivalent to a sleeve compensator, which can resist the intrusion of external corrosive media and add a line to the corrugated tube compensator. The safety barrier, even if the bellows is damaged, the compensator can play a compensation role and avoid the failure of the bellows.
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