DVS 0801-1973 "Volume measurement of industrial gases for welding, cutting and allied working methods"
DVS 2208-2-1978 history
2005DVS 2207-3 Beiblatt 2-2005 "Welding of thermoplastics - Hot-gas string-bead welding and hot-gas welding with torch separate from filler rod of pipes, pipe components and sheets - Requirements for welding equipment and accessories"
1978DVS 2208-2-1978 Welding of thermoplastics; machines and equipment for hot-gas welding (not extrusion welding)
DVS 2208-2-1978 Welding of thermoplastics; machines and equipment for hot-gas welding (not extrusion welding) was changed to DVS 2207-3 Beiblatt 2-2005 "Welding of thermoplastics - Hot-gas string-bead welding and hot-gas welding with torch separate from filler rod of pipes, pipe components and sheets - Requirements for welding equipment and accessories".