Identify a common failure point in piping systems.

A common failure point in piping systems is indeed the joints and connections. These areas are particularly susceptible to issues because they are critical points where two or more sections of pipe meet. Several factors can contribute to failure at these joints and connections, including stress from thermal expansion and contraction, corrosion from the materials or the fluids being conveyed, and poor installation practices which can lead to leaks or structural weaknesses.

Over time, the stresses that piping systems undergo, combined with environmental factors like moisture and chemical exposure, can cause joints to weaken. Corrosion can also significantly degrade materials, leading to failures at these points. Proper installation techniques, such as ensuring correct alignment, applying appropriate sealants, and using the right materials for the specific environment, are crucial for maintaining the integrity of these connections.

Other choices, while they may also lead to failures, do not represent as common or significant failure points as joints and connections. For example, pipe material fatigue generally occurs over a prolonged period and under specific conditions, and valves can fail due to sealing issues, but these failures often occur less frequently compared to the widespread challenges faced at joints and connections. Similarly, while rust can affect supports and hangers, the stress and improper installation at joints are more prevalent and critical factors in the overall