Profile: Sigmaflex Engineering Pvt. Ltd. designs & manufactures singleply or multiply piping bellows expansion joints, square & rectangular ducting bellows, soft instrumentation bellows, and S/S flexible hose assemblies. Our line includes wide variety of types, sizes and configuration which are used in literally thousands of applications. A universal expansion joint is an assembly containing two bellows connected by a center pipe and equipped with tie rods. Universal expansion joints are mainly used to absorb any combination of the three basic movements in the piping system. A pressure balanced single or universal expansion joint is an assembly designed to absorb axial movement and /or lateral deflection, while the pressure thrust is balanced by means of an additional bellows and tie rods. This type of expansion joint can usually be used only where change of direction occurs in the piping system. A hinged expansion joint is an assembly designed to absorb angular rotation in the plane, perpendicular to the hinge pins. The hardware consists of two hinged plates 180° apart and joined to the end connection. The hinged hardware is designed to absorb the pressure thrust of the expansion joint assembly. A pair of hinged expansion joints absorb lateral deflection.