An Inline pressure balance expansion joint is designed to absorb axial, lateral and angular deflection, while restraining the pressure thrust exerted by the internal pressure and without a change in direction of the piping. The pressure thrust is restrained by the tie rods arrangement, which connects the line bellows and the balancing bellows. It is a constant volume system, so the Main Anchors can be designed as intermediate anchors, and function only to direct the thermal expansion of the pipe towards the expansion joint.