Trenchless Rehabilitation of District Heating Pipes
01
This is CarboSeal
The first Carbon Liner ever
Withstanding Harsh Conditions
CarboSeal is a unique solution for replacing subterranean service pipes and structures with little or no excavation. After years of development and testing, PPR has created CarboSeal—a pipe lining system that withstands the high-heat, high-pressure corrosive environment in and around district heating pipes.
Interested in CarboSeal? Feel free to contact us!
- Withstands temperatures of 130°C/266°F and 16 bar pressure or more
- For pipe dimensions from DN 100 to DN 500 (other DN available on request)
02
Characteristics
A Unique Solution
Non-Invasive
The entire underground pipe system is renewed without disturbing the activities above the pipe. Traffic, businesses, and other activities is left uninterrupted during the process. It is a fast, cost efficient solution for district heating pipe system rehabilitation.
Long-Lasting
CarboSeal is a composite of carbon fibre and high temperature epoxy resin. The epoxy resin has been developed to withstand high temperatures in wet conditions and is combined with a type of carbon fibre that is not affected by water. This material system has been developed to withstand high-pressure, high-temperature and corrosive environments over time.
Developed for Tough Conditions
CarboSeal has been developed to handle the tough conditions found in district heating networks and can deal with temperatures of 130 °C and 16 bar pressure or more.
The use of an epoxy developed for high temperatures in wet environments in combination with a carbon fiber unaffected by water gets around problems that arise with traditional liners. At present, we offer CarboSeal for dimensions from DN 150 to DN 450.
- Flow capacity is maintained or increased thanks to a lower surface roughness
- Environment is spared with a trenchless renewal – CO² emissions are reduced by up to 80%
Non-Invasive
The entire underground pipe system is renewed without disturbing the activities above the pipe. Traffic, businesses, and other activities is left uninterrupted during the process. It is a fast, cost efficient solution for district heating pipe system rehabilitation.
Long-Lasting
CarboSeal is a composite of carbon fibre and high temperature epoxy resin. The epoxy resin has been developed to withstand high temperatures in wet conditions and is combined with a type of carbon fibre that is not affected by water. This material system has been developed to withstand high-pressure, high-temperature and corrosive environments over time.
Developed for Tough Conditions
The entire underground pipe system can be renewed without disturbing any activities above. Traffic, businesses, and other activities remain uninterrupted during the process, making this a fast, cost-efficient solution for renewing district heating pipe systems.
- Flow capacity is maintained or increased thanks to a lower surface roughness
- Environment is spared with a trenchless renewal – CO² emissions are reduced by up to 80%
03
Our Offering
A Verified & Supported Product
Verified
Thorough work by the Research Institute of Sweden (RISE) and other partners PPR has proved that CarboSeal can overcome the issues encountered by conventional trenchless technologies when applied to district heating pipes.
- Withstands hydrolysis
- No loss of fiber surface properties over time
- Long-term resistance to high-temperature water
Support
We have long experience of working with CarboSeal, and we offer training for installation companies to ensure the best possible outcome.
If you are interested in installing CarboSeal or finding out more, you are welcome to contact us, and we will answer all your questions.
Verified
Thorough work by the Research Institute of Sweden (RISE) and other partners PPR has proved that CarboSeal can overcome the issues encountered by conventional trenchless technologies when applied to district heating pipes.
- Withstands hydrolysis
- No loss of fiber surface properties over time
- Long-term resistance to high-temperature water
Support
We have long experience of working with CarboSeal, and we offer training for installation companies to ensure the best possible outcome.
If you are interested in installing CarboSeal or finding out more, you are welcome to contact us, and we will answer all your questions.
04
How it Works
5 Steps to the Renewal
1. Cleaning the Host Pipe
Start by cleaning the host pipe to remove foreign objects, welding residues, sediments etc.
2. Video and Dimension Control
Inspect to ensure secure pull-in and installation of the liner.
3. Pull in the Liner
The liner is pulled in by winch on a protective film. Several hundred metres of pipe can be renewed in one shot.
4. Curing with Steam
After the liner is pulled in, pressurized steam is applied, which unfolds and hardens the liner against the host pipe.
5. Connecting the Renovated Pipe
Special couplings are used to seal the transition between liner and host pipe. Air is used to perform a leakproofing test before sealing the openings by welding.
1. Cleaning the Host Pipe
Start by cleaning the host pipe to remove foreign objects, welding residues, sediments etc.
2. Video and Dimension Control
Inspect to ensure secure pull-in and installation of the liner.
3. Pull in the Liner
The liner is pulled in by winch on a protective film. Several hundred metres of pipe can be renewed in one shot.
4. Curing with Steam
After the liner is pulled in, pressurized steam is applied, which unfolds and hardens the liner against the host pipe.
5. Connecting the Renovated Pipe
Special couplings are used to seal the transition between liner and host pipe. Air is used to perform a leakproofing test before sealing the openings by welding.