• 111 manual arc flux welding (MMA);
• 131 manual arc inert gas flux welding (MIG);
• 135 manual arc active gas flux welding (MAG welding);
• 136 arc metal wire active gas welding;
• 137 arc metal wire inert gas welding;
• 141 arc tungsten inert gas welding (TIG welding);
• Combined method: core 
• 141 arc tungsten inert gas welding/filling and decoration 
• 111 manual arc flux welding (MMA)