Finland’s oldest city became the stage for a new record setting trenchless pipeline rehabilitation project where 1,000 m of old pipe were successfully rehabilitated in just 40 days using 10 Alphaliner1800H with a total weight of 212 t.
The sewer rehabilitation company EEROLA OY has been well established on the Finnish market for almost four decades. With more than forty employees, the family-owned company rehabilitates over 40 km of old pipe annually, and yet the project in Finland’s former capital, Turku, was a special case in its history. Not only the need for meticulous planning was a challenge. In particular, a reliable partner had to be found that could not only produce and deliver GRP liners with the appropriate requirements, but also provide and operate the required equipment for installation.
Trusted and Reliable Partnerships
“We knew that if we were going to do this complex job, it would only work with a partner who had experience in both fields. Producing large-diameter GRP liners in the shortest possible time and also being able to supply the equipment that is 100% compatible with these.” said Petteri Eerola of Putkistosaneeraus (PSE) EEROLA. “With RELINE as our supplier, we knew that they were capable of providing us with meticulous and expert support in all the planning and preparations. This is the only way to implement a project of this complexity.”
Liners Installed in The Shortest Time Ever
Turko, is today a pioneer of sustainable and ecological urban development, was the scene of this equally sustainable and environmentally-friendly record setting project, which started at the beginning of October 2022. A total of 10 Alphaliners with a total length of 1,000 m were installed in the south-western Finnish metropolis. Particularly remarkable were the dimensions, lengths and weights of the GRP liners, which were deliberately ordered with peroxide-free resin. The 10 Alphaliner1800H liners were produced, loaded and installed within 40 days. The DN 1600/WT 18.4 mm and DN1800/WT 20.5 mm Alphaliners were delivered safely and on time to the site 2,000 km away in variable, reusable, timber-clad metal racks.
“In each week of the project, around 35 t of Alphaliner1800H were produced and loaded at our factory in Rohrbach and that without affecting further deliveries to our other global customers. We attach great importance to this!” said Philipp Bergman, Area Sales Manager of RelineEurope GmbH. “It is important in such extraordinary projects that we are involved in the preparations of the installing companies and can also provide advice and offer implementable solutions from here as well as on site, practically as ‘construction site consulting’.” Another successful element of this project is, of course, the use of our UV technology, which is specially adapted to our GRP liners. There, every piece of the puzzle is individually matched.”
First Stage Completed In 40 Days
In addition to the folding packer (segmental end cans) from RELINE, an in-house developed conveyor belt with folding device and the REE4000 UV curing system were used on site. This allowed a curing speed of 250 mm/min to be achieved for the Alphaliners with a diameter of DN1600 and a wall thickness of 18.4 mm, and the first stage of the project in Turko was successfully completed within the specified time frame.