Hinged corrugated compensator/hinged bellows expansion joints have a single membrane with the overall length restrained by a hinged hardware assembly designed to accommodate the full pressure thrust and any additional loadings from external source.
A hinged expansion joint allows angular movement in a single plane. A gimbal assembly, which is basically a hinge arrangement jointed together by a floating “gimbal” ring, allows for angular rotation in all planes.
A piping system consisting of two gimbals and a hinge can accommodate very large movements with very low reaction loads on the adjacent equipment. This is a very attractive application for large diameter hot systems even if the movements are not in a single plane.
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