Agitator vessels - Part 14: Position and sizes of cover nozzles for glass lined steel agitator vessels, position H for vessels form BE with d<(Index)1> = 2400 mm to 3600 mm and position K for vessels form CE with d<(Index)1> = 2400 mm to 3600 mm; inactive for new design
Deutsches Institut Fur Normung E.V. (German National Standard) , 11/01/1999