Acetylene welder is a tool used to weld metal. There are several synonyms for the word acetylene welder, such as oxy-fuel welder, gas welder, and oxyacetylene welder. These terms are used to describe the process of welding metal using a combination of acetylene gas and oxygen. Other common synonyms include torch welder and welding torch, which refer to the handheld tool used to apply the flames to the metal. Welding using an acetylene welder is a popular method for creating strong, high-quality welds. The tool is versatile enough to be used in a variety of situations and can be operated by both amateur and professional welders.