DIN 16967-2
DIN 16967-2 Glass fibre reinforced epoxy resin (EP-GF) pipe fittings and joints; Elbows, Tees, Dimensions
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/1982
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/1982