What is the maximum operating pressure setting for an acetylene torch?

The maximum operating pressure setting for an acetylene torch is 15 PSIG. This is because acetylene is unstable and can become dangerous if its pressure exceeds this threshold. The reason for this restriction is that at higher pressures, there is a risk of acetylene decomposing explosively, which can lead to operational hazards.

Ensuring that the acetylene tank and torch are regulated to maintain a maximum pressure of 15 PSIG helps to minimize these risks and provides a safer working environment. The other pressures listed exceed this safe operating limit, increasing the potential for accidents or equipment failure.