Bellows squirm because they have surpassed the critical design pressure limit. This can occur in small diameter bellows with a large number of convolutions.
![Example of Bellows Squirm Example of Bellows Squirm](https://usbellows.com/wp-content/uploads/2019/05/bellows-squirm-example.jpg)
Bellows squirm because they have surpassed the critical design pressure limit. This can occur in small diameter bellows with a large number of convolutions.