At what pressure are acetylene gas regulators always redlined?

Acetylene gas regulators are always redlined at 15 PSI due to the unique properties of acetylene. Acetylene is a highly flammable gas, and exceeding this pressure can lead to dangerous situations such as instability or decomposition of the gas. Keeping the pressure at or below 15 PSI ensures safety while providing sufficient gas flow for welding operations. Additionally, operating above this threshold can increase the risk of flashbacks or explosions, making it a standard safety practice in the industry. Thus, 15 PSI is the critical pressure point set for acetylene regulators to ensure safe working conditions.