Which type of cylinder uses a fusible plug?

The type of cylinder that uses a fusible plug is specifically the acetylene cylinder. Fusible plugs are safety devices incorporated into acetylene cylinders to prevent the risk of explosion or rupture. These plugs are designed to melt at a certain temperature, allowing for the controlled release of gas if the cylinder experiences excessive heat, which can occur during a fire.

Acetylene is unstable at high pressures and temperatures; thus, the incorporation of fusible plugs adds an essential layer of safety. In contrast, oxygen cylinders do not require fusible plugs because oxygen itself does not present the same risks as acetylene under similar conditions.

This detail highlights the critical safety features specific to acetylene use in welding and cutting operations, reinforcing the importance of understanding the equipment and its safety mechanisms in welding practice.