Ball joints can be installed to absorb pipe movement in many applications ranging from thermal expansion or contraction of pipe, tank or building settlement, movement resulting from a seismic event, equipment movement such as solar panels and platens, and repetitive motion on bridges, oil platforms and ships.

USES:

A ball joint is used for allowing free rotation in two planes at the same time while preventing translation in any direction,^[1] including rotating in those planes. Combining two such joints with control arms enables motion in all three planes, allowing the front end of an automobile to be steered and a spring and shock (damper) suspension to make the ride comfortable.