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Fixed fire extinguishing systems for use on land

Impianto sprinkler

Sprinkler Systems

Automatic sprinkler systems are the best known and most widely used systems for putting out fires. The main feature of these systems is that their operation is completely automatic; the sprinkler system consists of a water supply unit, a control valve and a series of pipes to which the sprinklers are connected.
These automatic sprinkler systems are simple to operate and extremely safe. A bulb ensures that the system will operate automatically as soon as the fire breaks out. 
There are different types of sprinkler systems.  Those with a water supply system providing water under constant pressure (wet pipe system) or in which the pipes are filled with air (dry pipe systems)  to which closed bulb or fuse sprinklers are connected.

ADVANTAGES AND BENEFITS
Sprinkler systems have the capacity to control fires, safeguard structures and cool the site efficiently. 
They are simple and safe to operate, are automatically activated and can be used in a variety of applications.  The tecnical design standards for sprinkler systems are NFPA13 and the recently published European regulation EN12845.

impianto antincendio co2

CO2 Systems

Carbon dioxide (CO2) systems quickly extinguish all types of fires in areas not occupied by workers and allow operations to resume in a very short space of time since they leave no residue whatsoever after they have been deployed. Their application is based on total saturation systems for superficial or deep fires, locally applied systems or manually operated systems.  CO2 gas systems are a valid and reliable  fire-fighting method for use in a wide variety of applications.  They have excellent extinguishing properties due to their ability to reduce the concentration of oxygen which  hinders combustion and has a cooling effect.

ADVANTAGES AND BENEFITS
Odourless, colourless and electrically non-conductive, carbon dioxide acts quickly and extinguishes fires in a matter of seconds.  A correctly designed and planned system does not damage materials as it extinguishes, is non-corrosive and leaves no residue. It is a versatile system which can be used in a wide range of fire situations such as electronic equipment, high voltage apparatus and flammable materials.
Suitable for total site saturation systems, localised systems for high risk equipment or out in the open. The system has been designed in accordance with standard NFPA12.

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Inert Gas Systems

The IG 55 fire suppression system is a total saturation system which uses a  mixture of Argon and Nitrogen normally present in the atmosphere, in a ratio of 1:1.
The mixture acts on the fire reducing the concentration of  oxygen in the protected area to a level which prevents combustion without compromising the safety of any workers present.
The system has zero enviromental impact and does not adversely affect the ozone layer (ODP=0 and Gwp=0).

ADVANTAGES AND BENEFITS
This system is ideal for those areas occupied by staff. In fact, it is as effective in extinguishing fires as it is in safeguarding staff. It is used for the protection of  archives, museums, bookshops and other places where there are valuable items. It is also used where there are  electrical risks or risks from flammable, combustible gases.
The wide variety of cylinders, ranging from 30 to 140 litres, pressurised at 200-300 bar, guarantees the appropriate amount of gas necessary for saturating any volume required.
The use of cylinders at 300 bar, with a diameter equal to that of the cylinders at 200 bar, helps to reduce space and consequently, costs, to a minimum; likewise, the number of cylinders is reduced, as well as system installation and maintenance times.
These systems can be modular or centralised to meet the most varied requriements; the use of directional, pneumatic valves makes it possible to direct the discharge of gas, thus offering flexibility to every system. 
The cylinders are TPED certified (Directive 99/36/CE), the valves are PED certified (Directive 97/23/CE). The systems have been designed in compliance with the principle design standards.  The system has also been designed according to national and international ISO and NFPA standards.

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Foam-based systems

Foam based systems extinguish fires using a mixture of water foam of variable type and proportions according to the type of fuel present, by interposing itself between the fuel and the  combustion agent (oxygen), thereby extinguishing the flames by suffocation. 
These systems can be any of the following types according the water-foam mixture volume ratio before and after. The  generators/dispensers can be:

- low expansion with an expansion ratio up to 1:20;
- medium expansion with an expansion ratio up to 1:200;
- high expansion with an expansion ratio up to 1:1,000.
The foaming agents used vary according to the fuel present and the type of  foam system selected. The system is normally connected to a detection system with smoke or heat detectors in most cases.

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Water extinguishing systems

This is a manually activated active protection system, consisting of:
• Wall-mounted hydrants according to UNI EN 671-2 standard
• Above-ground standpost hydrants according to UNI 9485 standard
• Underground hydrants according to UNI 9486 standard
• Hose reels according to UNI EN 671-1 standard
• Outflow connections for Fire Brigade autopumps
• Shut-off system

The water is supplied directly from the aqueduct or from reservoirs connected to the correctly sized pumping units.
The pipe system is preferably of the permanently pressurised, ring closure type for fire extinguishing purposes only.

centrale analogica rilevazione incendi

Fire detection systems

The term fire detection system is used to refer to a series of components of fire alarm systems capable of detecting and warning of a fire inside a building or other infrastructure. 
A smoke and fire detector typically consists of electronic equipment which detect the presence of smoke or changes in temperature or the beginnings of a fire, on the basis of physical phenomena related to the fire’s development.

impianto water mist

Water Mist Systems

These systems uses fine water mist as the extinguishing agent. More precisely, the relevant European regulation UNI CEN/TS 14972:2008 defines water mist as a water spray for which the Dv0.90, measured on a plane situated 1 m from the nozzle, is less than 1000 µm; it specifies that the Dv0.90 is the value of the typical diameter whereby 90% of the total volume of spray is characterised by drops with a diameter smaller than this value. This type of water spray is obtained using  appropriate nozzles supplied with water at high pressure; in reference to the system’s design pressure, the European standard (previously stated) refers to three types of systems:

1. Low pressure systems (design pressure up to 12.5 bar)
2. Medium pressure systems (design pressure between 12.5 and 35 bar)
3. High pressure systems (design pressure higher than 35 bar)

The water mist system is highly effective in extinguishing fires, due to the different actions it performs:
1. a thermal cooling action, determined by the enormous absorption of the amount of heat;
2. a mechanical action of reducing the concentration of combustible oxygen, due to the significant quantities of water vapour quickly produced;
3. an action of reducing the thermal power transmitted by irradiation, due to the high quantity of fine particles and vapour dispersed into the  air, in addition to the combination of the phenomena of absorption and scattering.

impianto riduzione ossigeno

Oxygen Reduction Systems

A system of fire prevention by inertisation which artifically creates a normobaric and hypoxic environment in which the amount of combustible O2  is insufficient to start a fire. How is this done? By diluting the oxygen content in the air with nitrogen (Nitrogen System). This technology uses hypoxic air with a concentration of O2 reduced to 15%.

ADVANTAGES AND BENEFITS
Reliability and simplicity; no need for fire detection system; reduced wastage; zero aesthetical impact.

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