Individuals are familiar with GMAW techniques for root and fill passes on pipe. They understand the necessary procedures for preparing the area, materials, and equipment. They are able to identify acceptable and unacceptable weld profiles. They are aware of how to select the appropriate electrode wire and shielding gas. They are able to safely make acceptable open-root V-groove welds with GMAW equipment on medium- and thick-walled carbon steel pipe in the 1G-ROTATED, 2G, 5G and 6G positions.