What is a reason that thermal expansion joints may not be required in many systems?

Utilization of system design to direct pipe movement is a valid reason that thermal expansion joints may not be required in many systems. When pipes are designed effectively, they can be arranged in such a way that allows for natural movement caused by thermal expansion and contraction to be accommodated without the need for expansion joints. For instance, incorporating bends, offsets, or loops in the piping layout can provide flexibility, allowing the pipes to expand or contract without putting excessive strain on the joints.

This design approach can also help maintain the integrity of the piping system and reduce potential issues that may arise from thermal movements. By effectively considering the layout and the materials used, engineers can often mitigate the need for additional components, such as expansion joints, helping to streamline design and reduce costs.

In contrast, consistent temperature conditions might reduce the frequency of thermal expansion but does not eliminate the potential for movement completely. Higher construction costs could actually deter the use of expansion joints, but they do not provide a valid engineering rationale. Lastly, installation difficulties may arise, but these are not typically a reason that thermal expansion joints would be deemed unnecessary in a well-planned system.