Rectangular joints are most commonly used in low pressure ducting to absorb thermal growth, addition of flexibility in short runs, and as vibration absorbers adjacent to fans, blowers and other mechanical equipment. In general, they are used in the same manner as the corresponding circular joint.

Rectangular Expansion Joints have applications in the cement, power, petrochemical, refining, chemical and steel industries.

The main features of these expansion joints are that they absorb axial and lateral movements, absorb displacements due to thermal expansion, balance pressure thrust remains constant and they eliminate main anchors.