Invoice category of acetylene tempering valve

Safety production expenses. Acetylene tempering valve is a kind of fire-fighting equipment, and the charging category should be safety production expenses or fire-fighting equipment. Please consult the local tax authorities or financial professionals to confirm the correct billing category. The acetylene tempering valve is installed on the connecting pipe of the output joint of the acetylene pressure reducer to prevent tempering from entering the acetylene bottle during gas welding and gas cutting.