Building site report: renovating under the royal theater – sewer renovation blog
We’re back with a little blog entry! Our engineer Dennis got the opportunity to go to Greece to assist at a building site and was able to gain a fascinating insight into renovation in other countries 😉
Damage situation: crack with burst and presence of seawater at approx. 9.5m; DN 350 pipe
“Monday morning; Thessaloniki airport:
I had a warm welcome from the CEO of the company Ydrofili. After a visit to the office and getting to know the renovation engineers, we went to inspect the building site on Monday afternoon.
The public utility company was supposed to come and dismantle the pipe in question at 9 a.m. on Tuesday, but the rain caused the sea level to rise and the volume of water in the pipe forced us to postpone our project until later.
To make optimum use of the time we went ahead and cut the Flex 3D DN350 (5.5 mm) to size and the AIRBAGLINER® DN350 to match and prepared the fire hose. We also went ahead and attached the liner to the vacuum pump.
Then at 8 p.m. the public utility company was finally able to remove the pipe. After cleaning with the chain and flushing, we were able to perform a camera inspection.
We didn’t waste any time and started to mix the resin straight away. And of course we used Bodenbender EP170 resin for peace of mind! In Greece everything is a little more relaxed! 😉
The now approx. 100kg heavy liner then had to be lowered onto the pipe 3m down on a pallet by crane. Then we installed it by hand with finesse and sufficient lubrication with Bodenbender Flutsch wax!”
“Then, right after the installation, we inverted the AIRBAGLINER® in combination with the fire hose. Because we were standing approx. 1m away from the pipe with the inversion drum and the AIRBAGLINER® was filled with water here, we supported these with pallets. To counter the adjacent seawater, we set the pressure to 0.8 bar and were able to start replacing air with water at 10 p.m.
Since we had only one tap there, this took as long as you’d expect. But we were able to start the heating process at almost bang on midnight with the help of the Bodenbender Thermobox! We decided that three men from the company Ydrofili and I would stay on site to monitor the water level and the pressure. The inlet temperature of 90°C was not reached in the return flow due to the length – it did not exceed 62°C there.
After hours of waiting, a pizza at 2 a.m. and lots of funny stories, the liner had set at 5:30 a.m. In order to cool this slowly, we connected a pressure regulating valve, applied compressed air set to 0.8 bar, and left the pipeline section to cool until 3.30 p.m.
Following the subsequent removal of the AIRBAGLINER®, we cut away the excess liner and performed a camera inspection.
The liner looked great and the building site visit was brought to a successful end.
To celebrate, we all met in the late afternoon for Ouzo, beer and a delicious meal by the sea! 😊
Thanks to the team at Ydrofili for the insight into Greek renovation!
Until next time,
Dennis
