Single Gimbal expansion joints are designed to move in TWO angular planes. They are designed to absorb large amounts of Lateral and Angular movements in more than one plane while containing the pressure thrust forces. This is achieved by using in sets of two or three at a time.  

 

The hinges and pins prevent the bellows exerting thrust when subject to pressure. This results in the lowest possible stress on anchors and adjacent machinery, the only forces being the combined spring rate of the bellows & the friction of the pipe guides. This type of bellows is mainly used in sets of 2 or 3.  The movement that can be absorbed depends on the distance between the pins, which when increased, easily caters for large movements.