The principles of the ISO 9606 series specifies the qualification testing requirements for welders involved in fusion welding. It ensures that welders have the skills and competency necessary to produce high-quality, reliable welds under specified conditions.
An important requirement for general automotive and manufacturing organizations, it also has specific application to welding for pressurized vehicles and the aerospace industry. Its focus is on manual and partially mechanized welding and welders, rather than fully automated work.