Why should plant sprinkler main control valves be chained open?

Plant sprinkler main control valves should be chained open primarily to ensure that there is a continuous water supply to the sprinklers. This practice is crucial in maintaining the effectiveness of the sprinkler system, which is designed to respond quickly in the event of a fire.

When the main control valves are left open and secured, it guarantees that water is readily available for the sprinklers to function properly when activated. Any interruption or blockage in the water supply can severely hinder the system's ability to extinguish flames or control a fire situation effectively, potentially leading to greater damage or risk to safety.

While securing the valves may prevent unauthorized access and potentially help in tracking usage, the primary concern in fire safety protocols is always about ensuring that the fire protection systems are fully operational and ready to respond when needed. Maintaining pressure is also crucial, but chaining the valves open specifically emphasizes ensuring that the sprinklers have a reliable source of water, thereby supporting the overarching goal of fire prevention and safety in the plant.