Here there are two bellows and an intermediate pipe accompanied by some overall tie rods as special parts. In this kind of expansion joint, presence of two bellows creates the ability of damping axial and lateral – and of course angular just in one plane – movements simultaneously. Overall tie rods are part of a proper design in order to both uniformly distribution of movements between two bellows as well as resisting thrust force. In addition throughout the intermediate lug, the weight of intermediate pipe also is tolerated by overall tie rods. The intermediate lugs actually are as a safety factor against probable torsion too. One of the most important designing parameters in such a joint is the length of intermediate pipe which is drastically impressive on lateral flexibility as well as different capable movements of the expansion joint