Archive for December 23rd, 2011

Active Fire Suppression System Installed on the Pylons of the Bridge to the Russky Island

Friday, December 23rd, 2011

A state-of-the art Russian-made active fire suppression system has been successfully tested and commissioned during construction of the bridge over the Eastern Bosphorus Strait. The system is designed to lift water to the 350-meter elevation.

This system will fight fires using two methods: simply with water and with temperature-treated water. The latter method consumes a minimum quantity of water that is supplied at the temperature of +200°C under the pressure of 100 atmospheres. When water flows through a special spray nozzle at the end of the firefighting monitor a steam cloud with droplets of 10-50 µm in diameter is formed. Water in this state has many of its physical properties changed, and the man-made fog forms a film on the surface that was set on fire to lower the surface temperature to a significant extent.

When conventional firefighting technologies are used, as little as 10% of water is used directly for fire suppression, and the remaining 90% are just wasted. Everything goes the other way around when the temperature-activated water is used for fire suppression: As much as 90% of water is used purposefully and the water is not lost but rather stays in place as a cloud for almost 40 minutes. Therefore the new method consumes 10 times less water when fire is suppressed outdoors and 50-100 times less when fighting fire indoors.

The active fire suppression system has been installed on the right hand leg of M6 Pylon on the Nazimov Peninsula. The bridge builders, jointly with the designers with the Akva-Piro-Alyans Company, installed the special equipment and firefighting monitors on the self-lift shutter structures. With this arrangement, fire could be prevented simultaneously on both pylon legs. The innovative fire suppression system will be installed on M7 Pylon on the Russky Island shortly.

Photo by Igor Lischuk / SK MOST,
Vitalij Ankov / NPO Mostovik