Welding is a chemical welding method. Dabbing Unicorn welding shirt. That uses the flame retardant heat of oxygen in the gas to melt the welded metal and the additional welding rod that forms the weld. The gas-welding method is commonly used to weld thin metal plates and some colored alloys. Types of gases There are usually two types of gases: oxygen to maintain combustion and combustion gases such as hydrogen (H2), acetylene (C2H2), coal gas, gasoline vapor, benzene. The gas used for welding is acetylene. This gas, when burned in oxygen, emits a minimum heat of 11470 cal / m3 and brings the temperature to a maximum of 3150oC. Hydrogen is a colorless, odorless gas. Hydrogen can prepared by electrolysis or some other method.
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