FIRE HYDRANT NETWORK
Our firefighting company carries out the design, installation and maintenance of fire hydrants network.
This type of system is perhaps the most common among active fire protection systems and is mandatory in a multitude of buildings such as, for example, schools, garages, hospitals and health facilities, offices, cinemas and theaters, sports facilities, hotel and some condominiums.
The main Italian reference standard for the systems in question is UNI 10779 "Fire extinguishing systems - Hydrant networks - Design, installation and operation". In addition, however, also UNI EN 12845 "Fixed fire-fighting installations - Automatic sprinkler systems - Design, installation and maintenance" and UNI / TS 11559: 2014 "Fire extinguishing systems - Dry hydrant networks - Design, installation and maintenance and exercise"
Components
The hydrants network essentially consist of:
- UNI 45 wall hydrants (flow rate 120 l / min), ie a metal box including flexible hose, dispensing lance and hydrant tap
- UNI 25 hose reels (60 l / min or limited to LH 35 l / min), easier to use especially in the case of untrained personnel and usable as an alternative to UNI 45 hydrants if required
- UNI 70 aboveground column hydrants (300 l / min) or underground hydrants
- Delivery connections for fire brigade fire engines, which allow the injection of water by firefighters directly into the network in case of emergency
- Water supply, consisting of 1 or more tanks in series, necessary when the aqueduct alone fails to guarantee the required performance and reliability requirements
- Pumping group, consisting of 1 or more pumps, electric or diesel, according to the level of danger
- Network of fixed pipes, possibly closed in a ring, in steel if installed above ground or in Polyethylene if underground, for exclusive fire-fighting use.
- Possible seismic joints if you fall back into certain areas with seismic danger
Tipes
Hydrant networks are typically a wet system, that is, constantly filled with water. It is therefore essential that the piping network is always installed in heated environments or where the temperature never drops below 4 ° C.
However, if this is not possible, you can opt for a dry Hydrant Network which, unlike the previous one, has the pipes filled only with air (or inert gas) and, only at the moment of activation, these pipes will be filled with water. The hydrant network can be managed "dry" even for short periods during which the frost problem persists, and can be managed "wet" for the rest of the time.
Another type of distinction that can be made is between "internal protection", made with UNI45 hydrants or hoses installed inside the building or in a position that allows a close attack on the fire; and "external protection" with UNI70 or underground hydrants for firefighting from the outside
The complexity and extent of the network depends on the level of risk. The UNI 10779 standard defines 3 levels of Danger, depending on the quantity of combustible material present, the probability of ignition, and the speed of propagation of the flames.
How they work
A hydrant network uses water as an extinguishing medium, delivering it in abundant quantities. A hydrant system is a manual means of fighting fire, since it requires the intervention of an operator who opens the hydrant tap and directs the jet of water from the lance against the flames
Advantages and disadvantages
- No problems of environmental impact or toxicity compared to other systems such as foam or halocarbon gas;
- Water is an economic and widely available resource
- The decidedly abundant quantities of water used can damage the protected material or cause short circuits (eg paper archives, CED)
- Human intervention is required for use so the speed of intervention is not always guaranteed
- Generally, trained personnel are required for the use of hydrant devices
- If water reserve and pumping unit are required, the cost of the system can be high
- Requires constant and continuous maintenance to maintain efficiency
FIRE HYDRANT NETWORK
Our company carries out the design, installation and maintenance of Fire Hydrants network.
This type of system is perhaps the most common among active fire protection systems and is mandatory in a multitude of buildings such as, for example, schools, garages, hospitals and health facilities, offices, cinemas and theaters, sports facilities, hotel and some condominiums.
The main Italian reference standard for the systems in question is UNI 10779 "Fire extinguishing systems - Hydrant networks - Design, installation and operation". In addition, however, also UNI EN 12845 "Fixed firefighting installations - Automatic sprinkler systems - Design, installation and maintenance" and UNI / TS 11559: 2014 "Fire extinguishing systems - Dry hydrant networks - Design, installation and exercise" are fundamental.
Components
The hydrants network essentially consist of:
- UNI 45 wall hydrants (flow rate 120 l / min), ie a metal box including flexible hose, dispensing lance and hydrant tap
- UNI 25 hose reels (60 l / min or limited to LH 35 l / min), easier to use especially in the case of untrained personnel and usable as an alternative to UNI 45 hydrants if required
- UNI 70 column above ground hydrants (300 l / min) or underground hydrants
- Delivery connections for fire brigade fire engines, which allow the injection of water by firefighters directly into the network in case of emergency
- Water supply, consisting of 1 or more tanks in series, necessary when the aqueduct alone cannot guarantee the required performance and reliability requirements
- Pumping group, consisting of 1 or more pumps, electric or diesel, according to the level of risk
- Network of fixed pipes, possibly closed in a ring, in steel if installed above ground or in Polyethylene if underground, for exclusive fire-fighting use.
- Possible seismic joints if you fall back into certain areas with seismic risk
Types
Hydrant networks are typically a wet system, that is, constantly filled with water. It is therefore essential that the piping network is always installed in heated environments or where the temperature never drops below 4 ° C.
However, if this is not possible, you can opt for a dry Hydrant Network which, unlike the previous one, has the pipes filled only with air (or inert gas) and, only at the moment of activation, these pipes will be filled with water. The hydrant network can be managed "dry" even for short periods during which the frost problem persists, and can be managed "wet" for the rest of the time.
Another type of distinction that can be made is between "internal protection", made with UNI45 hydrants or hoses installed inside the building or in a position that allows a close attack on the fire; and "external protection" with UNI70 or underground hydrants for firefighting from the outside
The complexity and extent of the network depends on the level of risk. The UNI 10779 standard defines 3 levels of Risk, depending on the quantity of combustible material present, the probability of ignition, and the speed of flame propagation.
How do they work
A hydrant network uses water as an extinguishing medium, delivering it in abundant quantities. A hydrant system is a manual means of fighting fire, as it requires the intervention of an operator who opens the hydrant tap and directs the water jet against the flames
Advantages and disadvantages
- No problems of environmental impact or toxicity compared to other plants such as foam or halocarbon gas;
- Water is an economic and widely available resource
- The abundant quantities of water can damage the protected material or cause short circuits (eg paper archives, CED)
- Human intervention is required for use so the rapidity of intervention is not always guaranteed
- Generally, trained personnel are required for the use of fire hydrants
- If water reserves and pumping units are required, the cost of the system can be high
- Requires constant and continuous maintenance to maintain efficiency
Types of fire-fighting systems
Our Aerosol extinguishing systems are efficient, free from environmental impact and competitive on the market due to their swift design, installation and maintenance.
Carbon Dioxide (CO₂) systems are simple, reliable and effective. Being easy to manage and maintain, they offer total safety even in large industrial production spaces.
Our inert gas systems use Argon and Nitrogen which, due to their nature, offer complete safety even on particularly delicate and precious materials.
Dry powder extinguishing systems, in particular with Sodium Bicarbonate, are ideal for extensive sites in the petrochemical industry.
Water Mist extinguishing systems are efficient, having no environmental impact and being non-toxic, offering a high extinguishing power thanks to the elevated pressurisation of the water that is not released as a “deluge” but is sprayed.
In the event of fire, these active safety systems guarantee the escape of any smoke from the safeguarded rooms, produced by the combustion in the areas at risk. With this mode, the SistemOpen90°™ ensures the areas are safe and smoke-free, guaranteeing the area leading to the escape routes is protected.
Designed to suppress and extinguish fires of solid materials, flammable liquid fuels and electrical equipment.
Foam Systems avail of a mixture of water and foam to extinguish fires and are particularly appropriate in the presence of flammable liquids.
For all systems using water as an extinguishing agent, these guarantee that the flow rate is exact so as to ensure perfect efficiency and reliability.
ESSECI S.r.l. offers an instrumentation rental service and performs tests directly with its own qualified technicians. On request, a Test Report signed by a Fire Prevention Expert can also be issued.
In the event of a fire, active safety systems guarantee a higher pressure in the safeguarded premises than in the other environments. In this way, they keep the safeguarded areas constantly free from smoke, creating a protected area leading towards the escape routes.
Our smoke and gas detection systems, with the relative alarm signalling systems and any extinguishing units, guarantee full protection against the risk of fire.
Integrated detection, video monitoring and extinguishing systems with remote control for the open-air storage of various kinds of flammable materials.
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