Twin pipe system: Pre-insulated steel pipes for district energy

Pre-insulated two-pipe systems are excellently suited for the use of district heating and cooling and ensure maximum ecological benefit in transporting district heating and cooling. Pipes are manufactured according to EN15698-1 and the Energy industry's recommendation L1/2020 in the size classes DN20+20 – 250+250 and in different insulation classes. The delivery lengths of the pipes are 12 m, 16 m and, depending on the project, also 18 m.

Twin pipes consists of two steel pipes – one flow pipe and one return pipe – insulated with polyurethane foam in the same impact resistant and break-proof HDPE casing pipe. In this EPD, there is also considered copper alarm wires. Products covered by this EPD are presented in Annex 1.