Rectangular Expansion Joints are generally designed for low positive pressure and vacuum applications in the power, chemical, petrochemical, and steel
industries.
These expansion joints can be fabricated with single and multiple arches. Due to the fact that there are no standard dimensions for rectangular pipes, each rectangular expansion joint is custom designed. They can be built with more than one convolution.
Regardless of accessories, such as tie rods, hinges, liners, covers, etc. these models absorb all the movements in any one length of piping, but are mainly used to absorb axial movements. Like circular expansion joints, unrestrained units do not contain pressure thrust so adequate anchors and guides must be provided, and they can be used only in piping systems that incorporate correctly designed anchors and pipe alignment guides.