What is the purpose of a fusible plug in a chlorine cylinder?

A fusible plug in a chlorine cylinder is designed specifically to prevent rupture from heat. In the event of a fire or significant temperature increase, the fusible plug is made from a material that has a low melting point. When exposed to elevated temperatures, it melts and allows the contents of the cylinder to safely escape, effectively reducing the pressure inside the cylinder and preventing a catastrophic rupture or explosion. This safety feature is crucial in protecting both facility personnel and the environment from the dangers associated with chlorine gas release.

Other options do not accurately reflect the primary function of a fusible plug. For instance, aiding in the filling process, preventing theft, or improving gas flow does not address the critical safety role that the fusible plug plays in managing the risks associated with high-pressure gas cylinders.