Curious about the basics of metal inert gas welding? Watch this instructional welding video for some vital safety tips. A shielding gas tank contains 3,000 psi of pressure, so keep your welding equipment safe distance from your high pressure tanks. To run a bead, you need to set your wire feed speed and your voltage in order to begin welding with an average angle iron. This video provides all of the preliminary steps to running a short bead.