How to choose steel expansion bellows
The design of bellows is very complex, it needs to calculate and check the following parameters: pressure capacity, displacement caused by stress, the fatigue life, stiffness and stability.
Expansion bellows stress is caused by internal pressure and displacement, stress caused by displacement is usually greater than the internal pressure caused by stress, it is along the meridian to the direction of the corrugated pipe (warp), general is higher than the yield strength of corrugated pipe materials".
Expansion bellows’ scale effect depends on corrugated pipes. Expansion bellows function and strength design is mainly to the design of corrugated pipe. Different design and combination of bellows can make bellows stretching, compression or bending, thus forming the axial, lateral and angular three basic forms of corrugated compensator. So the design of the corrugated tube is the key to expansion bellows is designed.