What function does an excess flow control system serve?

The function of an excess flow control system is crucial in maintaining safety within medical gas systems. Specifically, it is designed to automatically shut off gas flow in the event of a rupture in the piping. This is significant because a rupture can lead to uncontrolled gas leaks, which can pose serious safety hazards, including risks of fire, explosion, or asphyxiation. By responding to a sudden increase in flow that indicates a breach, the system effectively prevents potential crises, ensuring that the integrity of the medical gas supply remains intact and safety is maximized.

This function is distinct from other options, such as regulating the flow of cryogenic fluids, which involves different systems, or capturing vapors and mists, which pertains to environmental controls not directly related to excess flow. Ensuring the safe storage of compressed gases involves different safety measures and equipment that are not specifically aligned with the primary purpose of an excess flow control system. The focus on immediate response to anomalies in gas flow makes option C the most accurate representation of the excess flow control system’s role.