- 111 Metal-arc welding with covered electrode;
- 131 MIG welding: metal-arc inert gas welding;
- 135 MAG welding: metal-arc active gas welding;
- 136 Flux-cored wire metal-arc welding with active gas shield;
- 137 Tubular cored metal arc welding with inert gas shield;
- 141 TIG root layer / 135 MAG overlay layers combined welding process;
- Plastic Fusion pre-heating and post-welding heat treatment.