Why are expansion loops necessary in long runs of piping?

Expansion loops are necessary in long runs of piping primarily to accommodate thermal expansion and contraction that occurs as temperatures fluctuate. When liquids are heated, they expand, causing the pipe to elongate. Conversely, when temperatures drop, the fluid cools and the pipe contracts. If this movement is not properly managed with expansion loops, it can lead to stress and potential damage to the pipe system, such as bending, buckling, or even failure of the joints.

The design of expansion loops provides a flexible section in the pipeline that can absorb these movements without transferring too much stress to any one section of the pipe, thereby maintaining the integrity of the system. This proactive approach to managing thermal dynamics is essential for ensuring the longevity and reliability of a piping system.

In contrast, the other options do not accurately describe the primary function of expansion loops. While increasing system pressure, minimizing water flow noise, or preventing corrosion are important considerations in pipe design, they do not address the critical issue of managing the physical expansion and contraction of materials due to temperature changes.