Oxy-acetylene welding is a process that uses a flame produced by burning a mixture of oxygen and acetylene gas to melt and join metal pieces together. This method is commonly used in metal fabrication and repair work due to its versatility and ability to reach high temperatures, allowing it to weld various metals, including steel and aluminum. The equipment for oxy-acetylene welding includes a welding torch, gas cylinders for oxygen and acetylene, and hoses to connect them. Proper safety measures, such as wearing protective gear and ensuring good ventilation, are essential to prevent accidents and injuries during the welding process.