What is the preferred material for constructing expansion joints?

The preferred material for constructing expansion joints is typically metal due to its strength, durability, and ability to withstand high temperatures and pressure fluctuations. Metal expansion joints can effectively accommodate thermal expansion and contraction in piping systems, making them suitable for a wide range of applications. They are designed to handle stresses caused by a variety of conditions, including movement caused by thermal changes, vibration, and misalignment.

Rubber, while useful in many applications, may not offer the same level of durability or high-temperature resistance as metal. Fiberglass can also be effective but is generally less commonly used for high-pressure situations or where extensive movement is prevalent. Styrofoam, being a lightweight and more flexible material, lacks the structural integrity and resilience required for the demanding conditions typically faced by expansion joints in piping systems.

Overall, metal’s properties make it the optimal choice for robust, reliable expansion joints in a variety of industrial settings.