Journeyman Pipefitter Practice Test 2026 – Comprehensive All-in-One Guide for Exam Success!

The purpose of an expansion joint in a piping system is indeed to absorb thermal expansion and prevent damage. When fluids are heated, they expand, which can lead to increased pressure and stress within the piping system. Expansion joints are specifically designed to accommodate this movement, allowing for safe expansion and contraction without causing undue stress on the pipes, fittings, and joints.

This flexibility is crucial in maintaining the integrity of the piping system, preventing leaks, structural damage, or catastrophic failures. By incorporating expansion joints, systems can accommodate temperature fluctuations, which is a common occurrence in various applications, including heating and cooling systems.

Improving water flow, replacing damaged pipes, or supporting additional weight are functions not typically addressed by an expansion joint. Instead, these tasks might involve different components or systems designed for those specific purposes. While maintaining adequate flow, ensuring structural support, and managing maintenance are all important aspects of piping systems, they are not the primary function of an expansion joint.