Pre-insulated PE-Xa pipe for heat networks

RAUTHERMEX: Efficient heat transfer for district heating projects

Compression sleeve jointing technique: craftsmen during installation

Pre-insulated PE-Xa pipe for heat networks

RAUTHERMEX: Efficient heat transfer for district heating projects

RAUTHERMEX. The pre-insulated PE-Xa pipe for the efficient transport of heat

For use in district heating networks offering a system with a long service life and the highest thermal insulation requirements.

Benefits

Optimum thermal insulation

Highest thermal insulation in its class thanks to the fine-pored PU foam and option of additional available insulation thickness (plus dimension)

Security through system certification

PE-Xa carrier pipes in combination with compression sleeve connection technology offering joint reliability and ease of installation.

Outstanding durability

PE-Xa carrier pipes offering up to 70% longer service life

Complete pipe and fittings product range

UNO pipe dimensions up to d160, DUO pipes up to d75 plus complete range of joints and shroud systems

Products

RAUTHERMEX pre-insulated pipe system

For district heating networks

Durable PE-Xa carrier lines combined with the highest thermal insulation in its class. RAUTHERMEX is ideally suited for virtually all applications in the district heating sector for efficiently transporting heat at temperatures of up to 95°C from generation to utilisation.

Suitable for all known installation methods from the open construction method, ploughing as well as pull-in and flush drilling methods.

Benefits

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

Downloads

ePaper download portal

Accessories

FUSAPEX

Electric welding socket system used alongside RAUTHERMEX and RAUVITHERM.

Operating temperatures -40°C to +95 °C at max 6 bar
No corrosion, good chemical resistance
Fully polymer system with high velocities
Cost saving

RAUTHERMEX clip shroud

2^nd generation with improved sealing rings allowing up to 200 bending of pipe
No hot works
Externally tested to 0.3 bar watertightness to EN 489
Uses high performance PU foam insulation

Modular Tees

Uses the renowned Everloc fitting, over 1 billion joints made worldwide
No O-rings in joint making these quick and easy to install
Simple visual inspection of the joint
For pipe sizes 25mm - 110mm
Over 600 possible configurations
Fabricated to order and individually pressure tested at the factory

Downloads

View from four different screens: smartphone, tablet, notebook and PC

Documents for download

Instruction manuals, handbooks, technical information, catalogues, price lists and certificates are available for download.

ePaper download portal

News

21.10.2025 Next Level Heat Networks event

REHAU is set to host a free in-person workshop centred around the future of district heating on 27 November 2025, at The Building Centre in London. The Next Level Heat Networks workshop offers a free opportunity to gain innovative insights into low-carbon heat networks, panel discussions and a chance to network with industry experts.

03.09.2025 Construction and Decarbonised Heat: Supplying the Suburbs

The continuing phase-out of gas boilers leaves new-build housing construction at a crossroads. Debate continues over what comes next in home heating, but with sustainability, efficiency and cost-effectiveness proving key, district heating networks are growing in popularity as a potential option.

12.08.2025 Key Considerations when Specifying Commercial Plumbing Systems

Growing demand for commercial projects has led to further scrutiny on all building services, with a drive for faster, more efficient installations with assured, long-lasting performance. Here we explore the implications for plumbing system specification.

All news

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