The tank of foam fire sprinkler systems is internally plastic-coated.
The fire sprinkler systems have a valve connected with a
glass bulb which is sensitive to heath and automatically
activates as soon as it reaches 68°C (93°C and 141°C on
demand). Common places: boiler rooms, garages, small
storages of flammable materials, rooms up to 40 m2 . Usually
installed from 1 to 3 m over the risk of fire.