For design and installation questions gas systems To extinguish a fire, contact only specialized organizations. On this type works our design and installation bureau engineering systems has a special license. Specialists will produce correct calculations areas and required quantity equipment, determine the consumption and type of gas mixtures, working conditions of personnel, temperature regime buildings and will take others into account important factors for installation of fire-fighting gas equipment. Our bureau will also undertake warranty obligations for repairs and service.

Features of gas fire extinguishing systems

The provisions of GOST, in accordance with the current legislation of Russia, allow the use of fire extinguishing gas compositions based on nitrogen, carbon dioxide, sulfur hexafluoride, argon inergen, freon 23; 227; 218; 125. Based on the principle of the effect of gas compositions on combustion, they are divided into 2 groups:

1. Inhibitors (fire suppressants). These are substances that enter chemical reaction with burning substances and taking away combustion energy.

2. Deoxidants (oxygen pushers). These are substances that create a concentrated cloud around the fire, preventing the flow of oxygen.

According to the method of storage, gas mixtures are divided into liquefied and compressed.

Application of systems gas extinguishing fire covers industries where contact of stored supplies with liquids or powders is unacceptable. First of all, this is:

• art galleries,
• museums,
• archives,
• libraries,
• computing centers.

Installations of gas fire extinguishing systems vary in the degree of mobility. Portable modules for extinguishing local fires can be used. There are also self-propelled and towed fire installations. In places with explosives, in warehouses and storage facilities it is more advisable to use automatic installations.

During the extinguishing process, gas from special capsules is sprayed into the room when a certain temperature is exceeded. The source of fire is localized by displacing oxygen from the room. Most of the substances in GOS are non-toxic, however, gas fire extinguishing systems can create an uninhabitable environment in a closed room (this applies to deoxidants). For this reason, when entering a room where gas equipment for fire extinguishing, warning sirens are required to be placed. Premises with installed gas fire extinguishing systems must be equipped with light screens: at the entrance “GAS! DO NOT ENTER!” and at the exit “GAS! LEAVE!".

According to the provisions of GOST and regulations, all automatic gas fire extinguishing systems must allow a delay in the supply of the mixture until the final evacuation of people.

Service

Maintenance of gas fire extinguishing systems is a special set of measures aimed at maintaining the system in a state of readiness for a long time. Activities include:

• Periodic testing at least once every five years;
• Scheduled checks of each individual module for gas leaks;
• Preventive maintenance and routine repairs.

When concluding an agreement for the design and maintenance of a gas fire extinguishing system, we will carefully consider and write down all obligations on our part regarding the provision of this service.

The cost of a gas fire extinguishing system consists of the complexity of the design, the set of equipment, the amount of installation work and service. By concluding an agreement with a design and installation bureau of engineering systems, you will ensure your production facilities effective system fire protection, which will be serviced by specialists.

MINISTRY OF THE INTERIOR
RUSSIAN FEDERATION

STATE FIRE SERVICE

FIRE SAFETY STANDARDS

AUTOMATIC GAS FIRE FIGHTING UNITS

STANDARDS AND RULES FOR DESIGN AND APPLICATION

NPB 22-96

MOSCOW 1997

Developed by the All-Russian Research Institute of Fire Defense (VNIIPO) of the Russian Ministry of Internal Affairs. Introduced and prepared for approval by the regulatory and technical department of the Main Directorate of the State Fire Service (GUGPS) of the Ministry of Internal Affairs of Russia. Approved by the Chief State Inspector Russian Federation on fire supervision. Agreed with the Ministry of Construction of Russia (letter No. 13-691 dated December 19, 1996). Put into effect by order of the Main Directorate of State Fire Service of the Ministry of Internal Affairs of Russia dated December 31, 1996 No. 62. Replaced SNiP 2.04.09-84 in the part related to automatic gas fire extinguishing installations (section 3). Effective date: 03/01/1997

Standards of the State Fire Service of the Ministry of Internal Affairs of Russia

AUTOMATIC GAS FIRE FIGHTING UNITS.

Codes of Practice for Design and Application

AUTOMATIC GAS FIRE EXTINGUISHING INSTALLATIONS.

Standards and rules of design and use

Date of introduction: 03/01/1997

1 AREA OF USE

These Standards apply to the design and use of automatic gas fire extinguishing installations (hereinafter referred to as AUGP). These Standards do not define the scope of application and do not apply to AUGP for buildings and structures designed according to special standards Vehicle. Application of AUGP depending on functional purpose buildings and structures, degree of fire resistance, category of explosion and fire hazard and other indicators are determined by the relevant current regulatory and technical documents approved in in the prescribed manner. When designing, in addition to these standards, the requirements of other federal regulatory documents in area fire safety.

2. REGULATORY REFERENCES

These Standards use references to the following documents: GOST 12.3.046-91 Automatic fire extinguishing installations. General technical requirements. GOST 12.2.047-86 Fire fighting equipment. Terms and Definitions. GOST 12.1.033-81 Fire safety. Terms and Definitions. GOST 12.4.009-83 Fire fighting equipment for the protection of objects. Main types. Accommodation and service. GOST 27331-87 Fire fighting equipment. Classification of fires. GOST 27990-88 Security, fire and security equipment fire alarm. General technical requirements. GOST 14202-69 Pipelines industrial enterprises. Identification paint, warning signs and markings. GOST 15150-94 Machines, instruments and other technical products. Versions for different climatic regions. Categories, conditions of climatic factors external environment. GOST 28130 Fire fighting equipment. Fire extinguishers, fire extinguishing and fire alarm systems. Symbols are conventional graphic. GOST 9.032-74 Paint and varnish coatings. Groups, technical requirements and designations. GOST 12.1.004-90 Organization of occupational safety training. General provisions. GOST 12.1.005-88 General sanitary and hygienic requirements for air in the working area. GOST 12.1.019-79 Electrical safety. General requirements and a range of types of protection. GOST 12.2.003-91 SSBT. Production equipment. General safety requirements. GOST 12.4.026-76 Signal colors and safety signs. SNiP 2.04.09.84 Fire automatics of buildings and structures. SNiP 2.04.05.92 Heating, ventilation and air conditioning. SNiP 3.05.05.84 Technological equipment and technological pipelines. SNiP 11-01-95 Instructions on the procedure for development, approval, approval and composition project documentation for the construction of enterprises, buildings and structures. SNiP 23.05-95 Natural and artificial lighting. NPB 105-95 Standards of the State Fire Service of the Ministry of Internal Affairs of Russia. Determination of categories of premises and buildings for explosion and fire safety. NPB 51-96 Gas fire extinguishing compositions. General technical requirements for fire safety and test methods. NPB 54-96 Automatic gas fire extinguishing installations. Modules and batteries. General technical requirements. Test methods. PUE-85 Rules for electrical installations. - M.: ENERGOATOMIZDAT, 1985. - 640 p.

3. DEFINITIONS

The following terms with corresponding definitions and abbreviations are used in these Standards.

		Definition	The document on the basis of which the definition is given
	Automatic gas fire extinguishing installation (AUGP)	Set of stationary technical means fire extinguishing system for extinguishing fires due to the automatic release of a gas extinguishing agent
			NPB 51-96
	Centralized automatic gas fire extinguishing installation	AUGP containing batteries (modules) with GOS, located in a fire extinguishing station, and designed to protect two or more premises
	Modular automatic gas fire extinguishing installation	AUGP containing one or more modules with GOS, located directly in the protected premises or next to it
	Gas fire extinguishing battery		NPB 54-96
	Gas fire extinguishing module		NPB 54-96
	Gas fire extinguishing agent (GOS)		NPB 51-96
	Nozzles	Device for release and distribution of GOS in a protected area
	Inertia of AUGP	Time from the moment the signal to start the AUGP is generated until the start of the expiration of the GOS from the nozzle into the protected room, without taking into account the delay time
	Duration (time) of GOS submission t under, s	Time from the beginning of the outflow of GOS from the nozzle until the estimated mass of GOS required to extinguish a fire in the protected area is released from the installation
	Standard volumetric fire extinguishing concentration CH, % vol.	The product of the minimum volumetric fire extinguishing concentration of GOS by the safety factor equal to 1.2
	Standard mass fire extinguishing concentration q N, kg ×m -3	The product of the standard volume concentration of GOS by the density of GOS in the gas phase at a temperature of 20 °C and a pressure of 0.1 MPa
	Room leakage parameter d= S F H / V P , m -1	A value characterizing the leakage of the protected premises and representing the ratio of the total area of ​​constantly open openings to the volume of the protected premises
	Degree of leakage, %	The ratio of the area of ​​permanently open openings to the area of ​​enclosing structures
	Maximum excess pressure in the room Р m, MPa	The maximum value of pressure in the protected room when the calculated amount of GOS is released into it
	State State Standards Reserve		GOST 12.3.046-91
	GOS stock		GOST 12.3.046-91
	Maximum jet size GOS	The distance from the nozzle to the section where the speed gas-air mixture is at least 1.0 m/s
	Local, start (switch on)		NPB 54-96

4. GENERAL REQUIREMENTS

4.1. The equipment of buildings, structures and premises of the AUGP must be carried out in accordance with the design documentation developed and approved in accordance with SNiP 11-01-95. 4.2. AUGP based on gas fire extinguishing compositions are used to eliminate fires of classes A, B, C in accordance with GOST 27331 and electrical equipment (electrical installations with a voltage not higher than those specified in the TD for the GOS used), with a leakage parameter of no more than 0.07 m -1 and a degree of leakage not more than 2.5%. 4.3. AUGP based on GOS should not be used to extinguish fires of: - fibrous, granular, porous and other flammable materials prone to spontaneous combustion and (or) smoldering inside the volume of the substance ( sawdust, cotton, grass flour, etc.); - chemicals and their mixtures, polymer materials, prone to smoldering and burning without air access; - metal hydrides and pyrophoric substances; - metal powders (sodium, potassium, magnesium, titanium, etc.).

5. DESIGN OF AUGP

5.1. GENERAL PROVISIONS AND REQUIREMENTS

5.1.1. The design, installation and operation of the AUGP should be carried out in accordance with the requirements of these Standards, other current regulatory documents as they relate to gas fire extinguishing installations, and taking into account the technical documentation for the elements of the AUGP. 5.1.2. AUGP includes: - modules (batteries) for storing and supplying gas fire extinguishing agent; - distribution devices; - main and distribution pipelines with the necessary fittings; - nozzles for the release and distribution of GOS in the protected volume; - fire detectors, process sensors, electrical contact pressure gauges, etc.; - instruments and devices for monitoring and control of AUGP; - devices that generate command impulses to turn off ventilation and air conditioning systems, air heating And technological equipment in a protected area; - devices that generate and issue command impulses for closing fire dampers and dampers ventilation ducts and so on.; - devices for signaling the position of doors in the protected premises; - sound and light signaling devices and notifications about the operation of the installation and gas start-up; - fire alarm loops, electrical power circuits, control and monitoring of AUGP. 5.1.3. The design of the equipment included in the AUGP is determined by the project and must comply with the requirements of GOST 12.3.046, NPB 54-96, PUE-85 and other current regulatory documents. 5.1.4. The initial data for the calculation and design of AUGP are: - geometric dimensions of the room (length, width and height of enclosing structures); - floor design and location engineering communications; - area of ​​permanently open openings in enclosing structures; - maximum permissible pressure in the protected room (based on the strength of building structures or equipment placed in the room); - range of temperature, pressure and humidity in the protected room and in the room in which the components of the AUGP are located; - list and indicators fire danger substances and materials located in the room and the corresponding fire class according to GOST 27331; - type, size and distribution scheme of the brewing load; - standard volumetric fire extinguishing concentration of GOS; - availability and characteristics of ventilation, air conditioning, air heating systems; - characteristics and arrangement of technological equipment; - category of premises according to NPB 105-95 and zone classes according to PUE-85; - presence of people and ways of their evacuation. 5.1.5. Calculation of AUGP includes: - determination of the estimated mass of GOS required to extinguish the fire; - determination of the duration of filing a state assessment; - determination of the diameter of the installation pipelines, type and number of nozzles; - determination of the maximum excess pressure when supplying GOS; - determination of the required reserve of GOS and batteries (modules) for centralized installations or reserve of GOS and modules for modular installations; - determination of the type and required number of fire detectors or sprinklers of the incentive system. Note. Method for calculating the diameter of pipelines and the number of nozzles for installation low pressure with carbon dioxide is given in recommended Appendix 4. For high-pressure installations with carbon dioxide and other gases, the calculation is carried out according to methods agreed upon in the prescribed manner. 5.1.6. AUGP must ensure the supply of no less than the calculated mass of GOS intended for fire extinguishing to the protected premises for the time specified in clause 2 of Mandatory Appendix 1. 5.1.7. AUGP must ensure a delay in the release of state emergency equipment for the time necessary to evacuate people after giving a light and sound warning, stopping ventilation equipment, closing air dampers, fire dampers, etc., but not less than 10 s. The required evacuation time is determined according to GOST 12.1.004. If the required evacuation time does not exceed 30 s, and the time to stop ventilation equipment, close air dampers, fire dampers, etc. Exceeds 30 s, then the mass of the GOS should be calculated based on the condition of ventilation and (or) leakage available at the time of release of the GOS. 5.1.8. The equipment and length of pipelines must be selected based on the condition that the inertia of the AUGP operation should not exceed 15 s. 5.1.9. The AUGP distribution pipeline system, as a rule, should be symmetrical. 5.1.10. AUGP pipelines in fire hazardous areas should be made of metal pipes. To connect the modules to the collector or main pipeline, it is allowed to use high-pressure hoses. The nominal diameter of incentive pipelines with sprinklers should be taken equal to 15 mm. 5.1.11. The connection of pipelines in fire extinguishing installations should, as a rule, be carried out by welding or threaded connections. 5.1.12. Pipelines and their connections in the AUGP must ensure strength at a pressure equal to 1.25 P RAB, and tightness at a pressure equal to P RAB. 5.1.13. According to the method of storing gas fire extinguishing composition, AUGPs are divided into centralized and modular. 5.1.14. AUGP equipment with centralized storage of GOS should be located in fire extinguishing stations. The premises of fire extinguishing stations must be separated from other premises by fire partitions of the 1st type and ceilings of the 3rd type. Fire extinguishing station premises, as a rule, must be located in the basement or on the first floor of buildings. It is allowed to place a fire extinguishing station above the first floor, while the lifting and transport devices of buildings and structures must ensure the possibility of delivering equipment to the installation site and carrying out operational work. The exit from the station should be provided outside, to a staircase that has access to the outside, to the lobby or to the corridor, provided that the distance from the station exit to staircase does not exceed 25 m and there are no exits to rooms of categories A, B and C into this corridor, with the exception of rooms equipped with automatic fire extinguishing systems. Note. An isothermal container for storing GOS can be installed outdoors with a canopy for protection from precipitation and solar radiation with mesh fencing around the perimeter of the site. 5.1.15. The premises of fire extinguishing stations must be at least 2.5 m high for installations with cylinders. The minimum height of the room when using an isothermal container is determined by the height of the container itself, taking into account the distance from it to the ceiling of at least 1 m. The temperature in the rooms should be from 5 to 35 ° C, the relative air humidity should not be more than 80% at 25 ° C, the illumination should be - not less than 100 lux with fluorescent lamps or not less than 75 lux with incandescent lamps. Emergency lighting must comply with the requirements of SNiP 23.05.07-85. Station premises must be equipped with supply and exhaust ventilation with at least double air exchange within 1 hour. Stations must be equipped with telephone communication with the premises of duty personnel who are on duty around the clock. At the entrance to the station premises there should be a lighted sign “Fire extinguishing station”. 5.1.16. The equipment of modular gas fire extinguishing installations can be located both inside the protected premises and outside it, in close proximity to it. 5.1.17. The placement of local starting devices for modules, batteries and distribution devices should be at a height of no more than 1.7 m from the floor. 5.1.18. The placement of centralized and modular AUGP equipment should ensure the possibility of its maintenance. 5.1.19. The choice of nozzle type is determined by their performance characteristics for a specific GOS specified in the technical documentation for the nozzles. 5.1.20. The nozzles must be placed in the protected room in such a way as to ensure that the concentration of GOS throughout the entire volume of the room is not lower than the standard. 5.1.21. The difference in flow rates between the two outer nozzles on one distribution pipeline should not exceed 20%. 5.1.22. The AUGP must be equipped with devices that eliminate the possibility of nozzles becoming clogged when releasing GOS. 5.1.23. Only one type of nozzle should be used in one room. 5.1.24. When nozzles are located in areas of possible mechanical damage, they must be protected. 5.1.25. Painting of installation components, including pipelines, must comply with GOST 12.4.026 and industry standards. Pipelines of installations and modules located in rooms that have special aesthetic requirements can be painted in accordance with these requirements. 5.1.26. All external surfaces of pipelines must be painted with protective paint in accordance with GOST 9.032 and GOST 14202. 5.1.27. Equipment, products and materials used in AUGP must have documents certifying their quality and comply with the conditions of use and project specifications. 5.1.28. AUGP of the centralized type, in addition to the calculated one, must have a 100% reserve of gas fire extinguishing agent. Batteries (modules) for storing the main and backup fire extinguishing agents must have cylinders of the same size and be filled with the same amount of gas fire extinguishing agent. 5.1.29. Modular-type AUGPs that have gas fire extinguishing modules of the same standard size at the facility must have a supply of GOS based on 100% replacement in the installation protecting the room of the largest volume. If at one facility there are several modular installations with modules of different standard sizes, then the GOS reserve should ensure the restoration of the functionality of the installations that protect the premises of the largest volume with modules of each standard size. The GOS stock must be stored in the facility's warehouse. 5.1.30. If it is necessary to test the AUGP, the supply of GOS for carrying out these tests is taken from the condition of protecting the premises of the smallest volume, unless there are other requirements. 5.1.31. Equipment used for AUGP must have a service life of at least 10 years.

5.2. GENERAL REQUIREMENTS FOR AUGP ELECTRICAL CONTROL, CONTROL, SIGNALING AND POWER SUPPLY SYSTEMS

5.2.1. AUGP electrical controls must provide: - automatic start-up of the installation; - disabling and restoring automatic start mode; - automatic switching of the power supply from the main source to the backup one when the voltage on the main source is turned off, followed by switching to the main power source when the voltage on it is restored; - remote start of the installation; - disabling the sound alarm; - delay in the release of the GOS for the time necessary to evacuate people from the premises, turn off ventilation, etc., but not less than 10 s; - generation of a command impulse at the outputs of electrical equipment for use in control systems for process and electrical equipment of the facility, fire warning systems, smoke removal, air pressurization, as well as for turning off ventilation, air conditioning, air heating; - automatic or manual shutdown of sound and light alarms about fire, operation and malfunction of the installation. Notes: 1. Local start-up must be excluded or blocked in modular installations in which gas fire extinguishing modules are located inside the protected room.2. For centralized installations and modular installations with modules located outside the protected premises, the modules (batteries) must have a local start.3. If there is a closed system that serves only a given room, it is allowed not to turn off the ventilation, air conditioning, and air heating after supplying the GOS to it. 5.2.2. The formation of a command pulse for the automatic start of a gas fire extinguishing installation must be carried out from two automatic fire detectors in the same or different loops, from two electrical contact pressure gauges, two pressure alarms, two process sensors or other devices. 5.2.3. Remote start devices should be placed at emergency exits outside the protected room or the room that includes the protected channel, underground, space behind suspended ceiling. It is allowed to place remote start devices in the premises of duty personnel with mandatory indication of the operating mode of the AUGP. 5.2.4. Remote start devices for installations must be protected in accordance with GOST 12.4.009. 5.2.5. AUGP protecting premises in which people are present must have automatic start shutdown devices in accordance with the requirements of GOST 12.4.009. 5.2.6. When opening the doors to the protected premises, the AUGP must ensure blocking of the automatic start of the installation with an indication of the blocked state according to clause 5.2.15. 5.2.7. Devices for restoring the automatic start-up mode of the AUGP should be placed in the premises of the duty personnel. If there is protection against unauthorized access to devices for restoring the automatic start mode of the AUGP, these devices can be placed at the entrances to the protected premises. 5.2.8. AUGP equipment must provide automatic control: - integrity of fire alarm loops along their entire length; - integrity of electrical starting circuits (for open circuit); - air pressure in the incentive network, launch cylinders; - light and sound alarm (automatically or by call). 5.2.9. If there are several directions of GOS supply, batteries (modules) and switchgear installed in the fire extinguishing station must have signs indicating the protected room (direction). 5.2.10. In rooms protected by volumetric gas fire extinguishing installations and in front of their entrances, an alarm system must be provided in accordance with GOST 12.4.009. Adjacent rooms that have access only through the protected rooms, as well as rooms with protected channels, underground spaces and spaces behind the suspended ceiling must be equipped with similar alarms. In this case, the light display “Gas - leave!”, “Gas - do not enter” and the warning sound alarm device are installed common for the protected room and protected spaces (channels, underground, behind the suspended ceiling) of this room, and when protecting only the specified spaces - common for these spaces. 5.2.11. Before entering the protected room or the room to which the protected channel or underground belongs, the space behind the suspended ceiling must be provided light indication AUGP operating mode. 5.2.12. In the premises of gas fire extinguishing stations there must be light alarm, recording: - the presence of voltage at the inputs of the working and backup power sources; - break in the electrical circuits of the squibs or electromagnets; - pressure drop in incentive pipelines by 0.05 MPa and launch cylinders by 0.2 MPa with decoding in directions; - activation of AUGP with decoding in directions. 5.2.13. In a fire station or other room with personnel on duty 24 hours a day, light and sound alarm: - about the occurrence of a fire with decoding in directions; - about the activation of the AUGP, with a decoding of the directions and the arrival of the GOS into the protected premises; - loss of voltage from the main power source; - about the malfunction of the AUGP with decoding in directions. 5.2.14. In AUGP, sound signals about fire and installation activation must differ in tone from signals about a malfunction. 5.2.15. In a room with personnel on round-the-clock duty, only light signaling should also be provided: - about the operating mode of the AUGP; - about turning off the audible fire alarm; - disabling the audible fault alarm; - about the presence of voltage on the main and backup sources nutrition. 5.2.16. AUGP must belong to electricity consumers of the 1st category of power supply reliability according to PUE-85. 5.2.17. In the absence of a backup input, it is allowed to use autonomous power sources that ensure the operation of the AUGP for at least 24 hours in standby mode and for at least 30 minutes in fire or malfunction mode. 5.2.18. Protection of electrical circuits must be carried out in accordance with PUE-85. It is not allowed to install thermal and maximum protection in control circuits, the disconnection of which may lead to a failure in the supply of GOS to the protected premises. 5.2.19. Grounding and grounding of AUGP equipment must be carried out in accordance with PUE-85 and the requirements of technical documentation for the equipment. 5.2.20. The selection of wires and cables, as well as methods of their installation, should be carried out in accordance with the requirements of PUE-85, SNiP 3.05.06-85, SNiP 2.04.09-84 and in accordance with the technical characteristics of cable and wire products. 5.2.21. The placement of fire detectors inside the protected premises should be carried out in accordance with the requirements of SNiP 2.04.09-84 or another regulatory document replacing it. 5.2.22. Fire station premises or other premises with personnel on round-the-clock duty must comply with the requirements of section 4 of SNiP 2.04.09-84.

5.3. REQUIREMENTS FOR PROTECTED PREMISES

5.3.1. Premises equipped with AUGP must be equipped with signs in accordance with paragraphs. 5.2.11 and 5.2.12. 5.3.2. Volumes, areas, flammable load, the presence and dimensions of open openings in protected premises must correspond to the design and must be monitored upon commissioning of the AUGP. 5.3.3. The leakage of premises equipped with AUGP should not exceed the values ​​specified in clause 4.2. Measures must be taken to eliminate technologically unjustified openings, door closers, etc. must be installed. Premises, if necessary, must have pressure relief devices. 5.3.4. In air duct systems for general ventilation, air heating and air conditioning of protected premises, air seals or fire dampers. 5.3.5. To remove GOS after the end of the AUGP operation, it is necessary to use general exchange ventilation of buildings, structures and premises. It is allowed to provide mobile ventilation units for this purpose.

5.4. SAFETY AND ENVIRONMENTAL REQUIREMENTS

5.4.1. Design, installation, commissioning, acceptance and operation of AUGP should be carried out in accordance with the requirements of safety measures set out in: - “Rules for the design and safe operation of pressure vessels”; - “Rules for technical operation of consumer electrical installations”; - “Safety rules for the operation of electrical installations of Gosenergonadzor consumers”; - "Unified safety rules for blasting operations (when used in squib installations"); - GOST 12.1.019, GOST 12.3.046, GOST 12.2.003, GOST 12.2. 005, GOST 12.4.009, GOST 12.1.005, GOST 27990, GOST 28130, PUE-85, NPB 51-96, NPB 54-96; - these Standards; - current regulatory and technical documentation, approved in accordance with the established procedure insofar as it relates to AUGP. 5.4.2. Local start-up devices for installations must be fenced and sealed, with the exception of local start-up devices installed in the premises of a fire extinguishing station or fire posts. 5.4.3. Entering the protected premises after the release of state protection equipment and extinguishing the fire until the end of ventilation is permitted only in insulating respiratory protective equipment. 5.4.4. Entry into the premises without insulating respiratory protection is permitted only after combustion products and decomposition of the GOS have been removed to a safe level.

ANNEX 1
Mandatory

Methodology for calculating AUGP parameters when extinguishing by volumetric method

1. The mass of the gas fire extinguishing agent (Mg), which must be stored in the AUGP, is determined by the formula

M G = Mr + Mtr + M 6 × n, (1)

Where Мр is the calculated mass of GOS intended for extinguishing a fire by volumetric method in the absence artificial ventilation indoor air, is determined: for ozone-safe refrigerants and sulfur hexafluoride according to the formula

Mr = K 1 × V P × r 1 × (1 + K 2) × C N / (100 - C N) (2)

For carbon dioxide according to the formula

Мр = К 1 × V P × r 1 × (1 + К 2) × ln [ 100/(100 - С Н) ], (3)

Where VP is the estimated volume of the protected room, m3. The calculated volume of a room includes its internal geometric volume, including the volume of a closed ventilation, air conditioning, and air heating system. The volume of equipment located in the room is not subtracted from it, with the exception of the volume of solid (impenetrable) fireproof building elements (columns, beams, foundations, etc.); K 1 - coefficient taking into account leaks of gas fire extinguishing agent from cylinders through leaks in shut-off valves; K 2 - coefficient taking into account the loss of gas fire extinguishing agent through leaks in the room; r 1 - density of the gas fire extinguishing composition, taking into account the height of the protected object relative to sea level, kg × m -3, determined by the formula

r 1 = r 0 × T 0 /T m × K 3, (4)

Where r 0 is the vapor density of the gas fire extinguishing composition at temperature T o = 293 K (20 ° C) and atmospheric pressure 0.1013 MPa; Tm - minimum operating temperature in the protected room, K; СН - standard volume concentration of GOS, % vol. The values ​​of standard fire extinguishing concentrations of GOS (S N) for various types of flammable materials are given in Appendix 2; Kz is a correction factor that takes into account the height of the object relative to sea level (see Table 2 of Appendix 4). The remainder of the GOS in the MMR pipelines, kg, is determined for AUGPs in which the nozzle openings are located above the distribution pipelines.

M tr = V tr × r GOS, (5)

Where Vtr is the volume of AUGP pipelines from the nozzle closest to the installation to the end nozzles, m 3; r GOS - the density of the GOS residue at the pressure that exists in the pipeline after the end of the outflow of the estimated mass of the gas fire extinguishing agent into the protected room; M b × n is the product of the remainder of the GOS in the battery (module) (M b) AUGP, which is accepted according to the TD for the product, kg, by the number (n) of batteries (modules) in the installation. In rooms where normal functioning Significant fluctuations in volume (warehouses, storage facilities, garages, etc.) or temperature are possible; it is necessary to use the maximum possible volume as the calculated volume, taking into account the minimum operating temperature of the room. Note. The standard volumetric fire extinguishing concentration CH for flammable materials not listed in Appendix 2 is equal to the minimum volumetric fire extinguishing concentration multiplied by a safety factor of 1.2. The minimum volumetric fire extinguishing concentration is determined according to the method set out in NPB 51-96. 1.1. The coefficients of equation (1) are determined as follows. 1.1.1. Coefficient taking into account leakage of gas fire extinguishing agent from vessels through leaks in shut-off valves and uneven distribution of gas fire extinguishing agent throughout the volume of the protected premises:

1.1.2. Coefficient taking into account the loss of gas fire extinguishing agent due to room leaks:

K 2 = 1.5 × Ф(Сн, g) × d × t UNDER × , (6)

Where Ф(Сн, g) is a functional coefficient depending on the standard volumetric concentration of СН and the ratio of the molecular masses of air and gas fire extinguishing composition; g = t W /t GOS, m 0.5 × s -1, - ratio of the molecular masses of air and GOS; d = S F H / V P - room leakage parameter, m -1; S F H - total leakage area, m 2 ; H is the height of the room, m. The coefficient Ф(Сн, g) is determined by the formula

Ф(Сн, у) = (7)

Where = 0.01 × C H / g is the relative mass concentration of GOS. The numerical values ​​of the coefficient Ф(Сн, g) are given in reference appendix 5. 2. The time of release into the protected room of the estimated mass of GOS intended for fire extinguishing should not exceed a value equal to: t POD £ 10 s for modular AUGP used as GOS freons and sulfur hexafluoride; t ADL £ 15 s for centralized AUGPs using freons and sulfur hexafluoride as GOS; t UNDER £ 60 s for AUGP using carbon dioxide as a GOS. 3. The mass of a gas fire extinguishing agent intended for extinguishing a fire in a room during operation forced ventilation: for refrigerants and sulfur hexafluoride

Mg = K 1 × r 1 × (V r + Q × t POD) × [ C H /(100 - C H) ] (8)

For carbon dioxide

Mg = K 1 × r 1 × (Q × t POD + V r) × ln [ 100/100 - C H) ] (9)

Where Q is the volumetric flow rate of air removed by ventilation from the room, m 3 × s -1. 4. Maximum excess pressure when supplying gas compositions with room leakage:

< Мг /(t ПОД × j × ) (10)

Where j = 42 kg × m -2 × C -1 × (% vol.) -0.5 is determined by the formula:

Рт = [С Н /(100 - С Н) ] × Ra or Рт = Ra + D Рт, (11)

And with room leaks:

³ Mg/(t POD × j × ) (12)

Determined by the formula

(13)

5. The release time of the GOS depends on the pressure in the cylinder, the type of GOS, the geometric dimensions of the pipelines and nozzles. The release time is determined during hydraulic calculations of the installation and should not exceed the value specified in paragraph 2 of Appendix 1.

APPENDIX 2
Mandatory

Table 1

Standard volumetric fire extinguishing concentration of freon 125 (C 2 F 5 H) at t = 20 ° C and P = 0.1 MPa

	GOST, TU, OST
		volume,% vol.	Mass, kg × m -3
Ethanol	GOST 18300-72
N-Heptane	GOST 25823-83
Vacuum oil
Cotton fabric	OST 84-73
PMMA
Organoplastic TOPS-Z
Textolite B	GOST 2910-67
Rubber IRP-1118	TU 38-005924-73
Nylon fabric P-56P	TU 17-04-9-78
	OST 81-92-74

table 2

Standard volumetric fire extinguishing concentration of sulfur hexafluoride (SP 6) at t = 20 °C and P = 0.1 MPa

Name of combustible material	GOST, TU, OST	Standard fire extinguishing concentration Сн
		volume,% vol.	mass, kg × m -3
N-Heptane
Acetone
Transformer oil
PMMA	GOST 18300-72
Ethanol	TU 38-005924-73
Rubber IRP-1118	OST 84-73
Cotton fabric	GOST 2910-67
Textolite B	OST 81-92-74
Pulp (paper, wood)

Table 3

Standard volumetric fire extinguishing concentration of carbon dioxide (CO 2) at t = 20 °C and P = 0.1 MPa

Name of combustible material	GOST, TU, OST	Standard fire extinguishing concentration Сн
		volume,% vol.	Mass, kg × m -3
N-Heptane
Ethanol	GOST 18300-72
Acetone
Toluene
Kerosene
PMMA
Rubber IRP-1118	TU 38-005924-73
Cotton fabric	OST 84-73
Textolite B	GOST 2910-67
Pulp (paper, wood)	OST 81-92-74

Table 4

Standard volumetric fire extinguishing concentration of freon 318C (C 4 F 8 C) at t = 20 ° C and P = 0.1 MPa

Name of combustible material	GOST, TU, OST	Standard fire extinguishing concentration Сн
		volume,% vol.	mass, kg × m -3
N-Heptane	GOST 25823-83
Ethanol
Acetone
Kerosene
Toluene
PMMA
Rubber IRP-1118
Pulp (paper, wood)
Getinax
Expanded polystyrene

APPENDIX 3
Mandatory

General requirements for local fire extinguishing installations

1. Local volumetric fire extinguishing installations are used to extinguish fires of individual units or equipment in cases where the use of volumetric fire extinguishing installations is technically impossible or economically infeasible. 2. The estimated volume of local fire extinguishing is determined by multiplying the base area of ​​the protected unit or equipment by its height. In this case, all calculated dimensions (length, width and height) of the unit or equipment must be increased by 1 m. 3. For local fire extinguishing by volume, carbon dioxide and freons should be used. 4. The standard mass fire extinguishing concentration for local extinguishing by volume with carbon dioxide is 6 kg/m3. 5. The time for applying GOS during local extinguishing should not exceed 30 s.

Methodology for calculating the diameter of pipelines and the number of nozzles for a low-pressure installation with carbon dioxide

1. Average (during the supply time) pressure in an isothermal container p t, MPa, is determined by the formula

р t = 0.5 × (р 1 + р 2), (1)

Where p 1 is the pressure in the container during carbon dioxide storage, MPa; p 2 - pressure in the container at the end of release of the estimated amount of carbon dioxide, MPa, determined from Fig. 1.

Rice. 1. Graph for determining the pressure in an isothermal tank at the end of the release of the estimated amount of carbon dioxide

2. The average consumption of carbon dioxide Q t, kg/s, is determined by the formula

Q t = t /t, (2)

Where m is the mass of the main supply of carbon dioxide, kg; t - carbon dioxide supply time, s, is taken according to clause 2 of Appendix 1. 3. The internal diameter of the main pipeline d i, m, is determined by the formula

d i = 9.6 × 10 -3 × (k 4 -2 × Q t × l 1) 0.19, (3)

Where k 4 is the multiplier, determined from the table. 1; l 1 - length of the main pipeline according to the project, m.

Table 1

4. Average pressure in the main pipeline at the point of its entry into the protected room

p z (p 4) = 2 + 0.568 × 1p, (4)

Where l 2 is the equivalent length of pipelines from the isothermal tank to the point at which the pressure is determined, m:

l 2 = l 1 + 69 × d i 1.25 × e 1 , (5)

Where e 1 is the sum of the resistance coefficients of pipeline fittings. 5. Medium pressure

p t = 0.5 × (p z + p 4), (6)

Where pz is the pressure at the point of entry of the main pipeline into the protected room, MPa; p 4 - pressure at the end of the main pipeline, MPa. 6. The average flow rate through the nozzles Q t, kg/s, is determined by the formula

Q ¢ t = 4.1 × 10 -3 × m × k 5 × A 3 , (7)

Where m is the flow coefficient through the nozzles; a 3 is the area of ​​the nozzle outlet, m; k 5 - coefficient determined by the formula

k 5 = 0.93 + 0.3/(1.025 - 0.5 × p ¢ t) . (8)

7. The number of nozzles is determined by the formula

x 1 = Q t/ Q ¢ t.

8. Internal diameter of the distribution pipeline (d ¢ i, m, calculated from the condition

d ¢ I ³ 1.4 × d Ö x 1 , (9)

Where d is the diameter of the nozzle outlet. Note. The relative mass of carbon dioxide t 4 is determined by the formula t 4 = (t 5 - t)/t 5, where t 5 - initial mass carbon dioxide, kg.

APPENDIX 5
Information

Table 1

Basic thermophysical and thermodynamic properties of freon 125 (C 2 F 5 H), sulfur hexafluoride (SF 6), carbon dioxide (CO 2) and freon 318C (C 4 F 8 C)

Name	Unit
Molecular mass
Vapor density at P = 1 atm and t = 20 °C
Boiling point at 0.1 MPa
Melting temperature
Critical temperature
Critical pressure
Liquid density at P cr and t cr
Specific heat capacity of liquid	kJ × kg -1 × °С -1
	kcal × kg -1 × °С -1
Specific heat capacity of gas at P = 1 atm and t = 25 °C	kJ × kg -1 × °С -1
	kcal × kg -1 × °С -1
Latent heat of vaporization	kJ × kg
	kcal × kg
Gas thermal conductivity coefficient	W × m -1 × °C -1
	kcal × m -1 × s -1 × °C -1
Dynamic gas viscosity	kg × m -1 × s -1
Relative dielectric constant at P = 1 atm and t = 25 °C	e × (e ast) -1
Partial vapor pressure at t = 20 °C
Breakdown voltage of GOS vapor relative to nitrogen gas	V × (V N2) -1

table 2

Correction factor taking into account the height of the protected object relative to sea level

Height, m	Correction factor K 3

Table 3

Values ​​of the functional coefficient Ф(Сн, g) for refrigerant 318C (C 4 F 8 C)

		Volume concentration of freon 318C Sn, % vol.	Functional coefficient Ф(Сн, g)

Table 4

The value of the functional coefficient Ф(Сн, g) for refrigerant 125 (С 2 F 5 Н)

Volume concentration of freon 125 Сн, % vol.		Volume concentration of freon 125 Сн,% vol.	Functional coefficient (Сн, g)

Table 5

Values ​​of the functional coefficient Ф(Сн, g) for carbon dioxide (СО 2)

	Functional coefficient (Сн, g)	Volume concentration of carbon dioxide (CO 2) Сн, % vol.	Functional coefficient (Сн, g)

Table 6

Values ​​of the functional coefficient Ф(Сн, g) for sulfur hexafluoride (SF 6)

	Functional coefficient Ф(Сн, g)	Volume concentration of sulfur hexafluoride (SF 6) Сн, % vol.	Functional coefficient Ф(Сн, g)

1 area of ​​use. 1 2. Normative references. 1 3. Definitions. 2 4. General requirements. 3 5. Design of augp.. 3 5.1. General provisions and requirements. 3 5.2. General requirements for electrical control, monitoring, alarm and power supply systems for augp... 6 5.3. Requirements for protected premises.. 8 5.4. Safety and security requirements environment.. 8 Annex 1 Methodology for calculating AUGP parameters when extinguishing using the volumetric method.. 9 Appendix 2 Standard volumetric fire extinguishing concentrations. eleven Appendix 3 General requirements for local fire extinguishing installations. 12 Appendix 4 Methodology for calculating the diameter of pipelines and the number of nozzles for a low-pressure installation with carbon dioxide. 12 Appendix 5 Basic thermophysical and thermodynamic properties of freon 125, sulfur hexafluoride, carbon dioxide and freon 318C.. 13

For several years, the F-Metrix company has been designing gas fire extinguishing installations for objects of various functional purposes. The action of gas fire extinguishing systems is based on the replacement of oxygen with gas substances that do not support combustion. The substance is supplied to the fire site under high pressure. The fire extinguishing agent can be carbon dioxide, freon or other substances.

Advantages of AUGPT

Gas fire extinguishing systems are often found in various enterprises and premises where the use of water as an extinguishing agent is not possible. Such installations have the following advantages:

• Fire extinguishing gaseous substance does not emit toxins, it is harmless to humans and does not pollute the object; after the end of the extinguishing process, the gas will be removed from the room by ventilation or ventilation;
• Gas fire extinguishing agent (GFA) does not conduct electricity;
• Automatic gas extinguishing systems respond to fire instantly, and the process of extinguishing the fire takes several minutes;
• Gas installations can work at low temperatures.

Designing AUGPT is especially relevant for server, generator, and transformer rooms, where there is a large amount of electronics and equipment that should not come into contact with water. In addition, the installations are used in museums, archives, libraries, and other places for storing material assets. Since automatic gas fire extinguishing installations completely displace oxygen from the room during the extinguishing process, people should not be there. If it is not possible to quickly evacuate a large number of people at a facility, other fire protection systems are installed there. AUGPTs are not used to extinguish substances that can support combustion or smoldering in the absence of oxygen.

Types of AUGPT and their composition

Part automatic systems includes:

• sensors that respond to temperature increases, smoke, the presence of flames and other detectors;
• panels, control panels for fire extinguishing installations;
• cylinders in which flammable fuels are stored;
• shut-off, distribution, starting devices;
• control and measurement instruments;
• pipelines;
• loops, power supply circuits, valves, etc.

AUGPT can be modular and centralized. The first include several cylinders with GFFS, sensors, and start valves. Such installations are installed directly in the protected area. The second ones design for objects large area. Cylinders with GOTV are installed in separate room, and the substance arrives at the combustion site through pipelines. Such a system is integrated into network engineering buildings or structures. When a fire alarm is triggered, the supply and exhaust ventilation are promptly shut off.

Design order

In order for us to begin developing the project, the Customer needs to submit an application, enter into an agreement with the company for the provision of services for the design of AUGPT, transfer to us the initial data about the object and all necessary documentation. Next, the F-Metrix engineer goes to the site to inspect it (if necessary). Based on all the information received, the following calculations are made:

• characteristics of the pneumatic installation;
• the time required for the extinguishing installation;
• the required quantity of GFFS, their locations;
• parameters of gas removal systems;
• other parameters, characteristics.

The design of gas fire extinguishing installations (GFP) is carried out on the basis of a specialist’s study of many building parameters, including quite specific aspects:

• dimensions and design features premises;
• number of premises;
• distribution of premises by fire hazard categories (according to NPB No. 105-85);
• presence of people;
• parameters of technological equipment;
• characteristics of HVAC systems (heating, ventilation, air conditioning), etc.

In addition, the fire extinguishing design must take into account the requirements of the relevant codes and regulations - this way the extinguishing system will be as effective as possible in fighting a fire and safe for people in the building.

Thus, the choice of a designer of a gas fire extinguishing installation should be taken responsibly; it is better if the same contractor is responsible not only for the design of the facility, but also for the installation and further maintenance of the system.

Technical description of the object

Gas fire extinguishing installation is a complex system, which is used in extinguishing fires of classes A, B, C, E in indoors. Selection optimal option GOTV (gas fire extinguishing agent) for UGP allows not only to be limited to those rooms where there are no people, but also to actively use gas fire extinguishing to protect objects where maintenance personnel may be located.

Technically, the installation is a complex of devices and mechanisms. As part of the gas fire extinguishing system:

• modules or cylinders that serve to store and supply GFFS;
• distributors;
• pipelines;
• nozzles (valves) with a shut-off and starting device;
• pressure gauges;
• fire detectors that generate a fire signal;
• control devices for UGP management;
• hoses, adapters and other additional elements.

The number of nozzles, diameter and length of pipelines, as well as other parameters of the UGP, are calculated by the master designer according to the methods of the Norms and Rules for the design of gas fire extinguishing installations (NPB No. 22-96).

Drawing up project documentation

The preparation of project documentation by the contractor is carried out in stages:

1. Inspection of the building, clarification of customer requirements.
2. Analysis of source data, performing calculations.
3. Drawing up a working version of the project, approval of documentation with the customer.
4. Preparation of the final version of project documentation, which includes:
   • text part;
   • graphic materials - layout of protected premises, available technological equipment, location of the UGP, connection diagram, cable route;
   • specification of materials, equipment;
   • detailed estimate for installation;
   • work statements.

The speed of installation of all equipment, as well as the reliable and efficient operation systems.

Gas fire extinguishing module

For storage, protection from external influences and release of fire extinguishing agents, special gas fire extinguishing modules are used to extinguish a fire. Externally, these are metal cylinders equipped with a shut-off and release device (ZPU) and a siphon tube. Those models in which liquefied gas is stored also have a device for controlling the mass of flammable fuels (it can be either external or built-in).

The cylinders usually have an information plate that must be filled out responsible person or UGP maintenance master. The following data must be entered on the plate regularly: module capacity, operating pressure. The modules must also be marked:

• from the manufacturer - trademark, serial number, compliance with GOST, expiration date, etc.;
• working and test pressure;
• mass of empty and charged cylinder;
• capacity;
• dates of testing, charging;
• name of the GOTV, its mass.

Activation of the module in case of fire occurs after a signal is received from the manual start devices or the fire alarm control device to the starting device (PU). After the launcher is triggered, powder gases are formed, creating excess pressure. Thanks to this, the seal is opened and the fire extinguishing gas comes out of the cylinder.

Cost of installation of gas fire extinguishing

The UGP designer must carry out a preliminary calculation of the installation cost of the installation.

The price will depend on several factors:

• the cost of technological equipment - modules, including components and the required amount of GFFS, control panels, detectors, displays, cabling;
• height and area of ​​the protected room (or rooms);
• purpose of the object;
• type GOTV.

Contract for installation of fire extinguishing system

High-quality gas fire extinguishing installation design, installation calculations, further Maintenance systems – we do all this for our clients.

Details such as:

• cost of work,
• payment order,
• installation deadlines,
• our obligations towards the customer, -

After discussion and approval with the client, they will be specified in the contract.

As a result, we get the job, and our client gets a gas fire extinguishing system with a guaranteed high degree of reliability and quality.

Fire protection of buildings and structures is becoming more and more relevant every year. Requirements are gradually being improved and tightened regulatory documentation, creating all conditions for timely information and effective protection of people and material assets in case of fire. Entire complexes are implemented for each object fire protection systems, one of which is a gas fire extinguishing system. In this article we will look at the scope of application, advantages and disadvantages, basic operating principles and design features of gas fire extinguishing systems.

Scope of gas fire extinguishing

Although gas fire extinguishing systems are not very common, in some cases you simply cannot do without them. Among such objects are premises for storing material and artistic values, archives, libraries, computer rooms, server rooms, etc. This is due to the fact that gas fire extinguishing installations cause virtually no harm, and with a properly organized ventilation system, the remaining fire extinguishing gas is removed from the premises almost instantly.

The principle of operation of the gas fire extinguishing system, its advantages and disadvantages

The mechanism of action of gas fire extinguishing is to displace the oxygen present in the room with a gas composition, without which the combustion process becomes impossible. When extinguishing with liquefied gas, there is an additional significant decrease in temperature in the extinguishing zone, which also has a positive effect on the extinguishing process as a whole.

The most significant advantage of gas fire extinguishing systems is that they cause minimal harm to equipment and materials located in the protected area. So, for example, to protect server rooms, it is simply impossible to use any other type of extinguishing, since extinguishing with foam, powder, aerosol or water will certainly lead to damage to expensive electronic equipment. The damage caused by such extinguishing methods can significantly exceed material losses in a fire. In addition to the absence of material damage, among the significant advantages of the gas fire extinguishing system, it is worth noting its increased resistance to temperature influences, which is not characteristic of any other fire extinguishing system. Removing released gas from a room is quite simple - using a stationary or mobile ventilation unit.

However, gas extinguishing systems also have certain disadvantages that must be taken into account during the design process. The most significant of them is the high danger to human life and health. Just one breath of extinguishing gas reduces the chances of survival to a minimum. And therefore prerequisite to start such systems is the evacuation of all people in the room, as well as control of closure front door. In addition, it is additionally necessary to provide special openings through which excess pressure will be released. The complexity of constructing gas fire extinguishing systems and their relatively high cost make such systems less popular among others. However, if you need to secure premises with the storage of material or spiritual values, expensive machines and mechanisms, a gas fire extinguishing system will be the most correct and reasoned choice.

Composition of a gas fire extinguishing system

So, first, let's look at what is included in a standard gas fire extinguishing installation. The first and main thing is a cylinder (1 or several) of gas, equipped with a squib or valve with electric start. The number of cylinders is calculated during design taking into account the required quantity fire extinguishing agent for each specific room. Naturally, all these calculations must be carried out exclusively by qualified specialists who have all the necessary permits to perform this type of work. Further from the cylinder there is a system of pipelines, at the end of which spray nozzles are located. It is through them that the protected room is filled with fire extinguishing gas. And of course, each system includes a monitoring and control device, which, based on a signal from fire detectors, initiates the start of fire extinguishing. It also turns on lights and sirens, and also transmits shutdown signals. supply and exhaust ventilation and air conditioning, closing fire suppression valves, starting the smoke removal system, etc. All these points must be discussed with the customer and the technologist and implemented during the design process of the facility.

Algorithm of operation of the gas fire extinguishing system

1. The control panel receives the “Fire” signal from fire detectors located in the protected room. As a rule, to avoid false alarms, such a signal is generated based on a signal from 2 detectors. If the signal comes from only 1 detector, and there is no confirmation, the control panel simply resets it.

2. Upon receiving the “Fire” signal, the control panel turns on the light indicator and “Gas” located above the door of the protected room. Come out” and sound alarms located inside the room, after which the extinguishing start delay countdown begins. This procedure is necessary to ensure that all people in the room have time to leave before the release of the fire extinguishing agent begins. Next, the PKU monitors the door of the room using a magnetic contact detector installed on it. If the door is closed, extinguishing is started; if not, the start is delayed until the door is closed. If automation is disabled, you must start the system in manual mode using the “Start extinguishing” button installed near the protected premises or remotely from the control panel.

3. After extinguishing starts, the gas contained in the cylinder is supplied through distribution pipelines to the spray nozzles located in the room. At the same time, the “Gas” sign located at the entrance lights up. Do not enter”, indicating that the room is filled with gas and entry is dangerous. A message indicating successful system startup is displayed on the control panel.

4. Upon completion of fire extinguishing, there is a need to remove combustion products and fire extinguishing agent from the premises. To do this, the PKU sends a signal to the smoke removal system, which opens the valve and turns on the exhaust fans. This process can also be performed using a mobile smoke removal unit, one hose of which is connected to special holes in the wall of the room, and the second is thrown out a window or door outside the building. This solution is used much more often than stationary installations, since it is much cheaper and does not require any installation work. In addition, if the protected facility has several rooms with gas fire extinguishing, only 1 mobile smoke removal unit will be enough for all of them, which will also significantly save the budget.

In fact, the algorithm presented above is relevant for any gas fire extinguishing systems and practically does not depend on the equipment manufacturer. Among the manufacturers, it is worth noting the systems of the company Bolid, built on the basis of the S2000-ASPT with the possibility of external control from the PKU S2000-M, as well as lesser-known systems of the companies Rubezh and Grand Master. The selection of equipment and design of a gas fire extinguishing system must be carried out exclusively by qualified specialists who have permission to perform this type of work.

Our company’s specialists have many years of experience in designing fire safety systems and gas fire extinguishing systems in particular. Performance design work quickly and efficiently - that's our job. The process will take into account all the customer’s wishes, the requirements of current regulatory documentation, as well as the design features of each specific facility. In addition, from us you can get answers to your questions regarding gas fire extinguishing systems, as well as receive qualified assistance in selecting the necessary equipment.