Fire Sprinklers
Wetpipe systems Fire Sprinklers:-
Wet pipe systems is the most commonly used fire
sprinkler systems. Because it is very reliable and at the same time simple. Basically it works like- in the event
of a fire, water is provided to the piping via the sprinklers heads by an
automatic water supply.
Drypipe systems Fire Sprinklers:-
It is a popular fire sprinkler system type. They are
usually installed in unheated buildings i.e.. Parking garages for example. Here the low ambient
temperature may freeze the water in an ordinary wet pipe system, making it
useless.
Therefore, in this kind of sprinkler system, the
water in the piping is replaced by air at a pressure below the water supply
pressure. When one or more of the automatic sprinkler heads is activated, it
opens so the air in the piping can come out from that sprinkler. The drop of
the air pressure in the piping allows water to vent and control the fire.
Delugesystems Fire Sprinklers:-
In this type of system all the sprinklers connected
to the water piping are open in order to provide a simultaneous jet of water
over the entire environment in case of fire. Indeed, they are usually installed
in locations where the risk of rapid fire spread is high.
In the event of fire, an alarm activates. This
signals the deluge valve to open allowing water to flow from the piping system.
Pre-actionsystems Fire Sprinklers:-
Pre-action systems are used in places where accidental activation
of the fire sprinklers should be avoided in the places like museums or Data Centres
etc…...
There are two types of pre-action systems: single
interlock and double interlock. The first is similar to dry pipe systems in the
way they operate but in this case the vent of water is preceded by a prior fire
detection event (the activation of a smoke detector for example). The system is
converted from a dry to a wet system, in order to reduce the delay of water
distribution to the piping that usually happens in dry systems.
The double interlock pre-action systems are similar
to deluge systems but, unlike the latter, they are provided with automatic
sprinklers. Also, they require that both a prior fire detection event and an
automatic sprinkler activation take place before the water comes to the system
piping. Otherwise, water will not get into the piping.
Foamwater sprinkler systems Fire Sprinklers:-
This special kind of sprinkler system discharges a
mixture of water and foam concentrate if activated. They are generally used in
case of high challenge fires, such as in the presence of flammable liquids. The
foam can be inserted in any of the systems described above.
Waterspray systems Fire Sprinklers:-
Water spray systems are identical to deluge systems
but, unlike the latter, the first are designed to safeguard a uniquely
configured hazard (so they don’t cover all the horizontal floor area of a
space). Electrical transformers, for example, are usually protected by a water
spray system.
Watermist systems Fire Sprinklers:-
This kind of system is typically used in conditions
where water may damage things or in case of minimal water supplies. They are
provided with a heat absorbent vapour and operate as a wet pipe, deluge, dry
pipe or pre-action system. In this case a compressed gas is used to atomise the
water, so it turns into a mist.
