Expansion loops are provided in piping systems primarily to:

• A. Absorb thermal expansion
• B. Reduce noise
• C. Increase pressure capacity
• D. Improve insulation

Answer: (A)

Expansion loops give piping a flexible path to accommodate changes in length as temperature changes. When a pipe heats up, it tends to lengthen, and if there’s no room to move, the resulting axial forces can stress supports, joints, and connected equipment. The loop creates a bendable section that can absorb that extra length, allowing movement without transmitting large forces to the rest of the system. This is why their primary purpose is to absorb thermal expansion. They aren’t mainly for reducing noise, increasing pressure capacity, or improving insulation.