Pre-insulated steel district heating pipes are designed to be buried directly in the ground. It can also be installed externally above ground. The Durotan Steel pre-insulated pipe system is manufactured to British Standards EN253. Durotan are the UK's leading preinsulated pipe installers and have supplied and installed pre-insulated steel pipe networks for district heating, biomass heating, district energy, CHP and community heating projects. Projects where we have installed steel pre-insulated pipe include: The Barbican - City of London, RAF St Mawgan - Cornwall, Met Office - Exeter, Broadmoor Hospital, Royal Military Academy - Sandhurst, Edinburgh University and H M Prison Manchester (Strangeways).