How to adjust the fire by gas welding and gas cutting

1 Triggers first, and the last switch triggers. Then turn on the oxygen, the one in front. At first, the fire should not be big, or the oxygen will be turned off. The flame can turn blue, which is called flame closure. Bake the edge of the target to be cut red and turn on the top switch. Open this a little.

2 Gas welding: Oxyfuel gas welding (OFW) is to use flame to heat and melt the metal and welding wire at the joint of metal workpiece to achieve the purpose of welding. Commonly used combustible gases are mainly acetylene, liquefied petroleum gas and hydrogen, and commonly used combustion-supporting gas is oxygen.