Where anchors are not possible and applicable options to resist different movements and forces in a piping system, an in line pressure balanced expansion joint is a perfect alternative in order to absorb those inevitable axial, lateral and angular movements as well as opposing thrust force. Of course these joints are designed with a universal flow bellows provided that there exists a relatively large lateral movement. In line pressure balanced expansion joints have got such an interesting structure in which when an extensive axial movement occurs, the flow bellows (duct size ones) becomes compressed however on the other hand, the balancer bellows (larger one) becomes extended simultaneously. At the end the whole structure makes equilibrium against all those movements as well as the thrust force
