Sigmaflex Engineering Pvt. Ltd. Manufactures Universal Expansion Joint with Overall Tie Rod. Sigmaflex Engineering Pvt. Ltd. Supplies metallic expansion bellows and hoses. Universal Expansion Joint with Overall Tie Rod is an assembly containing two bellows connected by a centre pipe and equipped with tie rods. Universal Expansion Joint with Overall Tie Rod is mainly used to absorb any combination of the three basic movements in the piping system [axial, lateral, and angular]. The bellows or expansion joint with end connection is designed to absorb all movements of the piping system in which it is installed. An expansion joint can consist of one or more bellows united by common connectors.