DVS 1502-2-1981 Manual arc welding of ductile iron pipes for public gas and water supply pipelines; welding of ductile iron or steel parts
DVS 1502-1-1981 history
2014DVS 1502-1-2014 Manual arc welding at pipes of ductile cast iron - Principles of welding engineering
1995DVS 1502-1-1995 Manual arc welding at pipes of ductile cast iron - Principles of welding engineering
1982DVS 1502-1-1982 Manual arc welding at pipes of ductile cast iron for pipelines of the public gas and water supply; principles of welding engineering
1981DVS 1502-1-1981 Manual arc welding of ductile iron pipes for public gas and water supply pipelines; welding principles