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Ripple compensator fatigue test

Release Time:

Mar 28,2019

Fatigue life design of bellows compensator According to the failure type and cause analysis, the plane stability, circumferential stability and corrosion resistance of bellows are related to its displacement, namely fatigue life. Too low fatigue life will lead to bellows stability and corrosion resistance decline. According to the test and use experience, the fatigue life of bellows used in heating engineering should not be less than 1000 times.

Fatigue life design of bellows compensator According to the failure type and cause analysis, the plane stability, circumferential stability and corrosion resistance of bellows are related to its displacement, namely fatigue life. Too low fatigue life will lead to bellows stability and corrosion resistance decline. According to the test and use experience, the fatigue life of bellows used in heating engineering should not be less than 1000 times.

Bellows can not bear weight, should be lifted separately; In addition to the predeformation required by the design of pre-stretching or cold tightening, it is strictly prohibited to adjust the installation deviation of the pipeline by making the bellows deform; Welding slag is not allowed to splash onto the surface of the bellows and suffer other mechanical damage during installation; All moving components of the bellows shall not be trapped by external components or restrict the normal operation of their moving parts.

Most bellows failure is caused by external environment corrosion, so in the design of compensator structure, can consider the isolation of external corrosive media and bellows contact. For example, the external pressure axial compensator can increase the packing sealing device between the outlet end ring and the outlet pipe, its function is equivalent to the sleeve compensator, which can resist the invasion of the external corrosive medium, and increase a safety barrier to the bellows compensator, even if the bellows damage, the compensator can also play a compensating role and avoid the failure of the bellows.