District heating pipes - Factory made flexible pipe systems - Part 4: Bonded system with metal service pipes; requirements and test methods; German and English version prEN 15632-4:2020
District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Surveillance systems; German and English version EN 14419:2009— 51 стр.
District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 2: Installation; German and English version EN 13941-2:2019— 195 стр.
