There are several ways to approach the expansion of pipe within a piping system. A common approach is to use sturdy pipe anchors, several pipe guides/slides accordingly and attach the necessary bellows expansion joints capable of withstanding axial or lateral movement. However, not every application has enough room for heavy load bearing anchors and several pipe guides/slides. This presents a problem that needs solving. One very good solution is to use a Tied Universal Bellows Expansion Joint.
The way it works (see photo):
A Tied Universal Bellows Expansion Joint contains two bellows with a pipe section or spool between them. It also comes intact with rods capable of restraining the pressure thrust, tied together with either flange by means of ears/lugs or using an integral flange design. Tie rods should not be confused with control rods; control rods limit movements only and are generally not designed to withstand pressure thrust. As long as the expansion joint does not go into a compressed deflection, the rods will stay taught and retain this force. The moment the joint goes into compression, the load on the rods is relieved and the pressure thrust is immediately relayed to the adjacent piping and anchors. The amount of lateral deflection they can accept is a function of the amount of angulation each bellows can absorb and the distance between the bellows. For a given bellows element the amount of lateral deflection capability can be increased or decreased by simply changing the length of the center spool.
“We have been manufacturing Tied Universal Bellows Expansion Joints for over 20 years”
DME can manufacture several different variations or configurations of a Tied Universal Bellows Expansion Joint to meet your needs. DME stocks a large inventory of bellows, flanges, piping and fittings to maintain quick turnarounds. Contact a product specialist at DME today to inquire about Tied Universal Bellows Expansion Joints.