What is the purpose of a safety plug in acetylene cylinders?

The purpose of a safety plug in acetylene cylinders is specifically to melt and release gas under high temperature conditions. Acetylene is a highly flammable gas that can become unstable if exposed to excessive heat or pressure. The safety plug acts as a fail-safe mechanism; it is designed to melt at a predetermined temperature, which allows gas to vent from the cylinder rather than allowing pressure to build to dangerous levels. This prevents the risk of explosion or rupture, thereby enhancing safety during storage and usage.

Understanding this mechanism is crucial, especially for those who handle acetylene cylinders in various applications, as it underscores the importance of safety features designed to mitigate risks associated with pressurized gases.