Heating and sanitary pipes with thermal insulation of PE-LD foam and film of PP. Thermal conductivity 0.04 W/mK according to DIN EN 8497, fire behaviour Cls1d0 (13 mm: Dls1d0) according to EN 13501-1, CFC- and HCFC-free, water vapour diffusion coefficient ≥ 6000 according to DSIN 52615.