Design and Stress Analysis of Extraterrestrial ... - The Black Vault

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Fig. 5.63.
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Bellows design.
Most frequently they are used as elastic couplings of piping
with angular and axial displacement; they are irreplaceable as
temperature compensators for displacements of individual parts of
the piping, while preserving the complete seal of the latter.
Bellows are used for sealing movable couplings in taps, valves, hnd
various distributors, and they also serve as the clascic lmniter1
of various media in the compensator, frequently with larý,e vartati-'ns
In the volumes of these media. The walls of the bellows can be botn
siiigle-layer and mult!-layer, simple or armored depending u ý:,!
requirements for system sealing or upon the fluid preosure a tne
4 pipes or vessel.
Let us discuss some of the general properties of bellow:i.
Obviously the movement of the limiting plane of hhe bellows under
the effect of axial loading, with other condltions remainlr!g conetanf.n
is directly proportional to the number of corrlations on it Z urf-/
and inversely proportional to the cube of the wall thickne s n.
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