Expansion joints

Two tie bar double tied expansion joints (TD)

For higher pressure applications where there is a limitation to the forces that connecting pipework can accomodate, double units are restrained against the opening-out effect due to pressure and load by the use of tie bars. These are desigened to contain the pressure end load within the unit lenght and do no transmit this load to the adjacent pipework. The tie bars are connected to the restraining flanges through spherical washers which allow for movement between the tie bars the flngers during operation.

This type of unit can accommodate large movements in the lateral plane and can operate in any directons. Provided there are no more then two tie bars, they can also accommodate angulation movements of the flangers. The amount of lateral movement is depended upon the unit’s lenght.