2001DVS 1902-1-2001 Welded steel operations and personnel requirements in domestic installations
1996DVS 1902-1-1996 Welded steel operations and personnel requirements in domestic installations
1988DVS 1114-1988 DVS courses; Gas welding in the region DVGW-TRGI 1986
1987DVS 1114-1987 DVS courses; Gas welding in the region DVGW-TRGI 1986
1983DVS 1114-1983 DVS training course; gas welding within the scope of DVGW-TRGI 1972
1976DVS 1114-1976 DVGW-TRGI 1972 Regional Gas Welder Training and Testing
DVS 1114-1988 DVS courses; Gas welding in the region DVGW-TRGI 1986 was changed to DVS 1902-1-1996 Welded steel operations and personnel requirements in domestic installations.