Fire safety in Tunnel

ORDER OF EVENTS IN CASE OF FIRE IN A TUNNEL

• The placement of nozzles is under the light fixture and cable trays to protect these from fire.
• Secures escape routes for personnel during evacuation.
• Maintaining electricity, lighting, ventilation and other control systems in the tunnel.

• A PLC-controlled magnet valve with Fail Safe Open function in each zone.
• The tunnel is parted into different zones, each zone is approximately  100-150 m.

• The first zone starts about 50-100 m inside the tunnel, from that point a spray nozzle is placed on each side with 10 -12 meter intervals.

• Nozzles at each end of the zone are set tup to close the area (zone) of to prevent gases and smoke from migrating into the tunnel.
• Overlapping Waterwalls are shown here by the darker fields.

• A main supply of water.
• A magnet valve for correct zoning
  with a Fail Safe Open Feature.
• Heat Detector. Fiber optic cable.
• 50 mm nozzles. The nozzles creates a Waterwall horizontally and vertically.

• In case of the fire spreading, new zones will open.

  The system can be operated remotely from a  road-central / fire station and with  local controls at both tunnel entrances.

Data sheets