Welding on LPG Tank Reused as an Air Compressor Tank

Hi. This is a project I made over the weekend. I got a discarded LPG tank came from a car that is converted to run on LGP or propane fuel. I reuse the tank as an air tank or air compressor receiver. This involves welding on the tank that used to hold a flammable gas. In the video, I show you how to prepare the tank to safely weld on it.