What is the upper safe pressure limit for acetylene gas?

The upper safe pressure limit for acetylene gas is indeed 15 psig. This limit is set due to the properties of acetylene under pressure. When acetylene is compressed above this pressure, it risks becoming unstable and poses a significant safety hazard. Acetylene can decompose explosively if subjected to high pressures, especially above 15 psig, where it can polymerize or react chemically in unintended ways.

Maintaining the pressure at or below this limit ensures safe handling and storage of acetylene, which is commonly used in welding and cutting applications. This safety measure is critical for preventing accidents and ensuring the safe operation of equipment that uses acetylene. Understanding this limit is essential for anyone working with acetylene in various industrial settings, as it is a fundamental aspect of gas safety regulations and practices.