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CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

Specifies a tied universal expansion joint. This is similar to a tied single joint, except that the tied universal has much higher transverse (lateral) movement capability. Pressure thrust loads are restrained internally by the tie-bars. These types of joints are a good option where vertical pipe runs close to the equipment are available. The tie-bars restrict movement to a single mode (lateral) and eliminate the worry about pressure thrust design. Longer lengths result in smaller lateral stiffnesses, but overall length is somewhat restricted by the weight of the center spool. A good rule of thumb is to restrict the overall length of the assembly to ten times the pipe diameter. Be careful not to put the assembly into compression, as the tie bar mechanisms are not designed to take this load and damage to the bellows can result.

These six types of expansion joints are not all the types available, but they are the most common. If a joint is needed that is not covered by the above, select the style closest to that required. Edit the resulting input after the EJ Modeler is complete and processing returns to the Classic Piping Input dialog box.