CASE STUDIES
Renovation of 50 year old pipes in the Pullmann Hotel, Paris
With more than 3000 m of BRAWOLINER® 3D DN 100-150 and 4 tonnes of BRAWO® resin, the company AFS Chemisage renovated the vertical wastewater pipes of the Pullmann Hotel in Paris.
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people, so the tight supply demands had to be delivered just in time on the job site,” Yaker Ait from BRAWO SYSTEMS described. “We managed the supply and service of this big volume in spite of the extreme length of the liner just as planned.”
BRAWOLINER® 3D DN 100-150
The BRAWOLINER® 3D was used in this project due to its extraordinary properties. As it was specially developed for large dimensional changes or several jumps in dimension in succession, the BRAWOLINER® 3D could be used in widths from DN 70 to DN 400. The seamlessly knitted liner adapts optimally to any pipe diameter and impresses with an excellent installation result. The extremely flexible polyester loop construction allows for enormous lateral expansion. This makes the BRAWOLINER® 3D an optimal rehabilitation solution for difficult wastewater systems. The BRAWOLINER® 3D was able to demonstrate these unique properties in the Pullmann project. After the installation work, the liners fitted perfectly and crease-free to the old pipes in the Pullmann Hotel.
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Fast hardening due to steam curing.
Beforethestart of the rehabilitation project, the situation was as follows:
The hotel building and the pipelines were from the 70s. The vertical wastewater pipes were made of cast iron and the building had to undergo a major renovation that would take four years. Originally, all the wastewater pipes were to be replaced. However, during the renovation, the replacement of the pipes was cancelled due to the high costs and time involved.
After flooding on some floors due to damaged pipes, the work was re-evaluated:
The end customer took the relining method option due to time and costs.
The challenge was the very short time frame of only five weeks. To repair 42 vertical cast iron DN 125 down pipes with the lengths of 70 m and 64 m each. We needed four people to install the liners and ten people to re-open the connections. “The work was cleaning, relining, re-opening connections and reconnecting. Because of the big job site we had a lot of equipment and
18 | March 2022 |
www.draintraderltd.com
In the Pullmann Hotel the new BRAWO® SteamGenerator 50 UL was used. Its low weight and mobility on the job site is ideal for installations in small areas and tight conditions e. g. like hotel floors or hotel rooms. This led to a fast rehabilitation process and the vertical pipes could be rehabilitated in a few hours in each case.
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