Metal Bellows Expansion Joint

The expansion joints

Stainless steel expansion joints are special devices which compensate thermal pipe expansion or contraction and absorb equipment vibration or pipe motions.
Bellows is a basic part of expansion joint and it is made by forming metal cylinder into annular corrugations. The bellows can be single or multi-ply.
The bellows properties and their flexibility depend on shape of convolutions, thickness and number of plies. Convolution geometry and the above characteristics determine the pressure resistance, bellows spring rates and all kinds of movement absorption.