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District heating & pre-insulated pipe
What is district heating?
District Heating utilises pre-insulated pipe to transport hot water from the energy centre to provide the heat demand for a number of properties, residential, commercial or multi occupancy.
The Energy Centre can use a variety of heat sources such as fossil fuels (e.g. gas CHP), Energy from Waste, industrial waste heat or renewable energy sources such as heat pumps, biomass or anaerobic digestion to heat the water.
The hot water travels through an underground pre-insulated pipe network to a heat interface unit (HIU) located in each building, this provides heating and hot water to each building and allows individual temperature control to each building. The cold water then returns back to the energy centre to be heated and circulated again.
RAUVIPEX pre-insulated PE-Xa pipe
The new standard in pre-insulated pipe for heat networks 20 – 160mm
- Highly flexible PE-Xa pipe with bonded PUR foam
- First district heating pipe range with SN8 ring-stiffness
- First flexible PU foamed pipe to reach Class A watertightness under AGFW 420-1
- Newly developed fine-poured PUR foam characterised by excellent insulation properties combined with outstanding flexibility
- Available up to 140 UNO and 75 DUO
RAUTHERMEX pre-insulated PE-Xa pipe
The efficient solution for heat networks 20 – 160mm
- Excellent thermal insulation with PU foam and a best in class lambda value of 0.0199W/mK
- 140mm UNO is the largest polymer flexible district heating pipe on the market which can transport up to 2.5MW of heat at 80°C/50°C flow & return temperatures
- Largest DUO pipe on the market (75 DUO)
- RAUTHERMEX Plus available with thicker insulation for up to 20% lower heat losses
- 10 bar option available
- No need to compensate for thermal expansion due to bonded foam structure
RAUVITHERM pre-insulated PE-Xa pipe
The flexible solution for heat networks in 25 – 160mm
- Excellent flexibility and low weight due to corrugated outer jacket and closed cell PEX insulation
- Long coils up to 330m possible which are 50% longer than similar flexible pipes
- The only PE-Xa district heating pipe manufactured in the UK which saves an estimated 29% on CO2 emissions annually.
- RAUVITHERM 125mm UNO can transport up to 1.7MW of heat at 80oC/50oC flow & return temperatures
- Outer layer of foam is bonded to the outer jacket
PP-R district heating pipes
REHAU now offer PP-R district heating pipes in 160-315mm (larger sizes available on request) to allow for a fully polymer heat network.
- Up to 37% lighter than steel and easier to handle
- No expansion bends – saving both installation and material costs
- Up to 19% lower pressure losses than steel
- Excellent corrosion resistance so no leak detection required
- Can be combined easily with REHAU’s PE-Xa for a fully polymer heat network
- Over 50 year lifespan at 70oC and 9.5 bar
A shroud revolution.
More universal. More flexible. More watertight.
Our new CLIP-FLEX shroud, universal for all REHAU district heating pipes.
Inspired by experience, optimised with passion: we have developed a ball joint function for our new CLIP-FLEX shroud that allows you to master even extreme angle deviations of up to 22.5°. Our integrated EPDM sealing system ensures that you can combine various REHAU pipe types and diameters extremely conveniently – without the need for separate sealing rings.