Cast steel welding elbows for storm valves – DN 50 to DN 150, flangeconnecting dimensions according to PN 10
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2014

Cast steel welding elbows for storm valves – DN 50 to 150, connecting dimensions according to PN 10
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2002