What is the maximum gauge pressure that acetylene should be used at?

The maximum gauge pressure for acetylene should not exceed 103 kPa (15 psi). This limit is in place due to the inherent properties of acetylene as a gas. Acetylene is unstable at pressures higher than this threshold, which can lead to dangerous explosive reactions, particularly if it is allowed to accumulate in a confined space.

Maintaining the pressure at or below 103 kPa ensures safety when using acetylene in welding applications. This knowledge is crucial for welders and individuals working with acetylene to prevent potential hazards. Understanding this limit is part of adhering to the safety protocols and standards set by organizations such as the Canadian Welding Bureau, thereby ensuring safe practices in welding environments.