...

...

Single Tied Expansion Joint is identical to the single unrestrained expansion joint, the only difference being; it is supported with tie rods. When tie rods are added to the expansion joint, it constrains the Bellows, eliminating overextending. Stops are set to allow axial movement for their intended design and motion. Where appreciable amounts of lateral deflection are imposed upon the Expansion Joint, some shortening of the Expansion Joint results from the displacement of the tie rods.  Care should be taken to ensure the sufficient piping flexibility exists to absorb this deflection, and that adequate clearances are provided in the guide to permit deflection of the piping.  The amount of the deflection can be minimized by cold springing the Expansion Joint ...