DIN 16968
DIN 16968 Pipes made of Polybutene-1 (PB-1) - PB 125 - General quality requirements and testing; Text in German and English
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/2012
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/2012