Materials used in a hydronic piping system should be rated for what factors?

In a hydronic piping system, the materials used must be rated for both temperature and pressure due to the nature of how these systems operate. Hydronic systems circulate water or other fluids to provide heating or cooling to a space. The temperature of the fluid can vary widely based on the system's design and operational requirements, which affects the material's ability to withstand thermal expansion, contraction, and potential degradation over time.

Moreover, pressure is a critical factor in ensuring the integrity and safety of the system. High pressure can cause materials to fail if they are not properly rated. Therefore, materials must be selected that can handle the maximum expected operating pressure safely, while also maintaining performance under varying temperatures. This is essential for preventing leaks, bursts, or other system failures that can lead to costly repairs and safety issues.

While factors such as flow rate and density are relevant in the context of overall system performance, they do not directly influence the material ratings required for safety and operational effectiveness like temperature and pressure do. Thus, in the context of hydronic systems, focusing on temperature and pressure is paramount for material selection.