Why is frost a concern on gas chlorine feed system components?

Frost on gas chlorine feed system components is a concern primarily because it indicates the potential formation of chlorine ice within the system. When chlorine gas is under pressure and then released, it can cool significantly, leading to the formation of frost or ice on the equipment. If there is internal chlorine ice present, there is a risk that this ice could reliquify under certain conditions, which may create an escape of chlorine gas if not properly managed.

This is a critical safety and operational issue, as the release of chlorine gas poses health risks, environmental hazards, and can lead to regulatory violations. Understanding the implications of frost forming on equipment is essential for ensuring that the system operates safely and effectively. While the other answers may touch upon important aspects like system performance or equipment integrity, they do not capture the specific dangers associated with the formation and potential reliquification of chlorine ice, which is central to the concern about frost on these systems.