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Special risks

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Special risks

special risks Diester industrial site
expansion foam
water fog
special risks installation

ENGIE Axima Sécurité Incendie and Promat Sécurité: your special risks experts

ENGIE Axima’s special risks activity is performed by a team of experts in the protection of industrial sites exposed to specific risks than cannot be protected by sprinklers alone.

Certain sites, including logistics warehouses or household waste incineration plants, and certain industries involving the production or storage of specific hazardous products need specific, made-to-measure protection against their special risks.

Our systems consultants, who are true experts in their fields and can propose the solutions best adapted to the customer’s risks, conduct a preliminary study.

Our engineering department takes charge of this first step, which is concluded by the proposal of a made-to-measure solution, from the analysis to the recommendations, from design to installation, and then the maintenance of the installed systems.

ENGIE Axima and Promat Sécurité now work together on these projects and the merger between the companies means that our customers benefit from the complete range of the expertise of the teams from these two entities, which are now partners.

Our know-how in these types of risks:

 

Automatic extinction

ENGIE Axima and Promat Sécurité study and analyze systems designed to extinguish fires, or in some cases to contain them until the emergency services arrive.

The extinguisher agent is selected according to the type of risks.

The following extinguisher agents are used:

fire extinguisher foam

Foams

Low-, medium- and high-expansion foams, depending on the environment.

Applications: petrochemicals, warehouses, incineration plants, etc.

Foam is produced by generators, hoses or cannons.

The mix of water and additive (the choice and dose depend on the risk) creates a film or a cushion that prevents or delays combustion by lowering the temperature.

Low-expansion extinguisher foam is mainly used against burning flammable liquids (hydrocarbons, alcohol, etc.). Medium- or high-expansion foam is recommended for the specific fire protection of storage buildings.

These solutions are mostly used in the petrochemicals industry, warehouses, incineration plants, etc.

 

Impressive performances

Our fire-fighting installations that use expansion foam are capable of filling a building beyond the storage height in less than 3 minutes.

water fog

Water fog

The water fog that is used to combat special fire risks works like a sprinkler system, except that it consists of a spray made of much smaller drops that are produced by higher pressure and/or special nozzles. The advantage of this technique lies in its exceptional cooling capacity.

Thanks to the latent vaporization heat of the water, which is at least four times higher than that of other liquids, vaporizing 1 kg of water in 1 second can absorb a thermal power of more than 2 MW.

This automatic extinction technique is mainly used in hotels, to occasionally protect machines, in datacenters, etc.

Water fog is also widely used to protect ships, due to its low water requirements.

It also has applications in industry: protection of transformers, generators, premises containing archives, electric plant rooms, tunnels, etc.

gas fire extinction installations

Extinguisher gases

Extinguisher gases are either inert (gases from air, such as argon, nitrogen and mixes of the two) or inhibitors (chemical gases, FM 200, FM 13).

The former reduce the oxygen content, while the latter modify the chemical combustion reaction.

These extinguisher gases do not harm human health, but it is advisable to stay clear of the point of extinction for safety reasons.

fire extinguisher powder

Powders

There are several types of powder.

Applications: Mainly burning metals and hydrocarbons.

When should powder be used to extinguish an incipient fire?

Powders, which are made mainly of sodium bicarbonate, are used for fire protection against special risks by smothering the base of the flames, in the same way as foam.

This technique can be used in an entire building, but it can also be used locally, for example on a particular machine.

This technique is widely used to combat the risk of metal fires and hydrocarbon fires.

fixed gas detection

 

Fire detection

Fire detection raises an alarm as quickly as possible in order to deploy the appropriate emergency resources.

ENGIE Axima and Promat Sécurité design and build fire detection systems that include:

  • Automatic smoke, heat and flame detectors, particle meters, linear meters, etc.
  • Thermographic cameras, capable of immediately identifying heat sources

These systems are completed by manual alarm units.

All this equipment sends information to the central fire detection system, depending on the size of the installation.

These central systems are conventional or addressable*.

‘*’conventional: the detectors are series-installed and, if a fault occurs, it is not identified by a single detector, but by a series of detectors.

‘*’addressable: the detectors are series-installed, but the fault is identified by the individual faulty detector(s) (point-by-point identification).

Fixed gas detection

Fixed gas detection is an essential part of any protection system.

The system is made up of a single- or multi-channel central unit, plus sensors or vacuum systems.

In boiler rooms, the main purpose of the gas detection system is to detect gas leaks from the burner supply, to control a gas stop valve and to raise the alarm.

Process: gas detection detects the slightest leak that could endanger the safety of the personnel and the means of production (food industry, petrochemicals, pharmaceuticals, chemicals, etc.)

Parking lots: the system detects carbon oxide pollution and starts the powerful extractor fans according to the concentration.

Gaseous extinguisher agents

 

 

Alarm and evacuation systems

Under French labor law, alarm and evacuation systems are compulsory if the establishment employs more than 20 people, or if the activity incurs risks (e.g., Seveso).

They are also compulsory in establishments open to the public.