If a gas chlorine leak occurs, which valve should be shut first?

In the event of a gas chlorine leak, the first step is to immediately shut the tank cylinder valve. This valve is crucial because it controls the flow of chlorine gas from the storage tank. By closing this valve first, you effectively stop additional chlorine from escaping into the environment, which is essential for minimizing potential hazards and protecting public safety.

Closing the tank cylinder valve helps to contain the leak and prevent further release of gas, enabling responders to assess the situation and take necessary safety measures. Once the tank valve is secured, attention can be turned to the other valves and parts of the system to manage the leak more effectively.

This choice highlights the importance of addressing the source of the gas leak directly and swiftly to mitigate risk and ensure safety in situations involving hazardous materials.