The guideline applies to heating element butt welding of pipes and pipe parts made of HDPE. The exception is the welding of pipes and pipeline parts for house and property drainage in accordance with DIN 1986 Part 4.
2005DVS 2207-1-2005 "Welding of thermoplastics - Heated tool welding of pipes, pipeline components and sheets made of PE-HD"
1995DVS 2207-1-1995 "Welding of thermoplastics - Heated tool welding of pipes, pipeline, components and sheets made from PE-HD"
1986DVS 2207-2-1986 "Welding of thermoplastic polymers, PE-HD (polyethylene of high density); heated tool butt welding; pipes and pipeline parts for sewers and sewage discharges"
1984DVS 2207-2-1984 Welding of thermoplastics, HDPE (rigid polyethylene); butt welding; sewer and sewer pipes and fittings