DIN 16963-1:1980 Pipe Joints and Elements for High Density Polyethylene (HDPE) Pressure Pipelines, Types 1 and 2; Pipe Bends of Segmental Construction for Butt-welding, Dimensions
DIN 3543-4:1984 High density polyethylene (HDPE) tapping valves for HDPE pipes; dimensions
DIN 3544-1:1985 High-density polyethylene (HDPE) valves; tapping valves; requirements and test