Gas shielded welding refers to a welding method that uses carbon dioxide or argon gas protection, without the need for welding rods or wires. CO2 welding has high efficiency, while argon gas shielded welding mainly welds materials such as aluminum, titanium, and stainless steel. Submerged arc welding uses welding wire and flux protection. The solder is like sand, burying the arc. Mainly used for welding thick plates. The hazard of gas shielded welding is that the arc and dust have a significant impact on the health of the welder.

Before using a welding torch, it is necessary to first check the suction performance and airtightness. The connection parts, gas channels, and regulating valves of the welding torch must not be contaminated with grease.

When igniting the welding torch, the acetylene valve should be opened first to ignite, and then the oxygen valve should be opened to adjust the flame; When turning off the fire, acetylene should be turned off first, followed by oxygen. When stopping use, it is strictly prohibited to permanently connect the welding torch, hose, and gas source.

When using a cutting torch, the paint and rust layers on the working surface should be cleaned thoroughly, and it is not allowed to work on cement floors to prevent rust proof water and cement from splashing and injuring people when exposed to high temperatures.

When igniting the cutting torch, it is necessary to conduct an ignition test first to check whether the cutting nozzle is installed properly. When a ceasefire occurs, acetylene should be turned off first, followed by oxygen.