2014DVS 1502-2-2014 Manual arc welding at pipes of ductile cast iron - Welding of parts of ductile cast iron or steel
1995DVS 1502-2-1995 Manual arc welding at pipes of ductile cast iron - Welding of parts of ductile cast iron or steel
1982DVS 1502-2-1982 Manual arc welding at pipes of ductile cast iron for pipelines of the public gas and water supply; welding of parts of ductile cast iron or steel
1981DVS 1502-2-1981 Manual arc welding of ductile iron pipes for public gas and water supply pipelines; welding of ductile iron or steel parts