Why is a ventilated cap important for propane cylinders?

A ventilated cap is crucial for propane cylinders because it minimizes the risk of explosion. Propane is a flammable gas, and during storage and transport, the buildup of pressure inside the cylinder can occur due to temperature changes or gas vapor expansion. A ventilated cap allows for the safe release of excess pressure while preventing the accumulation of gas that could potentially lead to a dangerous situation, such as an explosion. Proper ventilation ensures that any gas can escape safely, thus reducing hazards and making the handling of propane much safer. This safety feature is vital in maintaining the integrity of the cylinder and ensuring safe usage.