A gimbal expansion joint is designed to permit angular rotation in any plane by using two pairs of hinges attached to a common floating gimbal ring/box. Gimbal ring/box, hinge arms and pins are designed to restrain pressure thrust of the bellows and any extraneous forces where applicable.
Typical gimbal systems consist of “(2) gimbal expansion joints” or “(2) gimbal and (1) hinge expansion joints”.
Advantages of Gimbal Expansion Joints: Just as hinged expansion joints offer great advantages in single plane
applications, gimbal expansion joints are designed to offer similar advantages in multi-plane systems. Since gimbal expansion joints are not restricted to single plane systems, they have greater flexibility of usage.