American Welding Society is the maker of the national welding standards of the United States. It also represents the United States in the formulation of international welding standards. ATF welders not only to have extensive recognition in North America but also in the whole world. The AWS international welder certificate not only promotes personal ability recognition but also is essential for many international projects. It has a wide range of applications, not only for mechanical and steel structures, but also for general equipment , aviation and aerospace. The approval scope covers almost all welding methods and materials.