MINISTRY OF THE INTERIOR
RUSSIAN FEDERATION

STATE FIRE SERVICE

FIRE SAFETY STANDARDS

AUTOMATIC GAS FIRE EXTINGUISHING INSTALLATIONS

REGULATIONS AND RULES FOR DESIGN AND APPLICATION

NPB 22-96

MOSCOW 1997

Developed by the All-Russian Research Institute of Fire Defense (VNIIPO) of the Ministry of Internal Affairs of Russia. Submitted 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 for fire supervision. Agreed with the Ministry of Construction of Russia (letter No. 13-691 dated 12/19/1996). They were put into effect by order of the GUGPS of the Ministry of Internal Affairs of Russia dated December 31, 1996 No. 62. Instead of SNiP 2.04.09-84 in the part related to automatic gas fire extinguishing installations (section 3). Date of entry into force 01.03.1997

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

GAS FIRE EXTINGUISHING INSTALLATIONS AUTOMATIC.

Code of practice for design and application

AUTOMATIC GAS FIRE EXTINGUISHING INSTALLATIONS.

Standards and rules of design and use

Date of introduction 01.03.1997

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 and do not apply to AUGP for buildings and structures designed according to special vehicle standards. The use of AUGP, depending on the functional purpose of buildings and structures, the degree of fire resistance, the category of explosion and fire hazard and other indicators, is determined by the relevant current regulatory and technical documents approved in the prescribed manner. When designing, in addition to these standards, the requirements of other federal regulatory documents in the field of fire safety must be met.

2. REGULATORY REFERENCES

References to the following documents are used in these Standards: 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 equipment for the protection of facilities. 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 of industrial enterprises. Identification painting, warning signs and labels. GOST 15150-94 Machines, instruments and other technical products. Versions for different climatic regions. Categories, conditions of climatic environmental factors. GOST 28130 Fire fighting equipment. Fire extinguishers, fire extinguishing and fire alarm installations. Conditional graphic designations. GOST 9.032-74 Paint coatings. Groups, technical requirements and designations. GOST 12.1.004-90 Organization of labor safety training. General provisions. GOST 12.1.005-88 General sanitary and hygienic requirements for the air of the working area. GOST 12.1.019-79 Electrical safety. General requirements and nomenclature 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 automation of buildings and structures. SNiP 2.04.05.92 Heating, ventilation and air conditioning. SNiP 3.05.05.84 Technological equipment and process 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 Norms of the State Fire Service of the Ministry of Internal Affairs of Russia. Definition 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 the installation of electrical installations. - M.: ENERGOATOMIZDAT, 1985. - 640 p.

3. DEFINITIONS

In these Standards, the following terms are used with their respective definitions and abbreviations.

		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 equipment for extinguishing fires due to the automatic release of a gas fire extinguishing composition
			NPB 51-96
	Centralized automatic gas fire extinguishing installation	AUGP containing batteries (modules) with GOS, located in the 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, placed directly in the protected room or next to it
	Gas fire extinguishing battery		NPB 54-96
	Gas extinguishing module		NPB 54-96
	Gas fire extinguishing composition (GOS)		NPB 51-96
	nozzles	Device for the release and distribution of GOS in a protected room
	Inertia AUGP	The time from the moment the signal is generated to start the AUGP until the start of the expiration of the GOS from the nozzle into the protected room, excluding the delay time
	Duration (time) of filing GOS t under, s	The time from the beginning of the expiration of the GOS from the nozzle until the moment the estimated mass of the GOS is released from the installation, which is necessary to extinguish a fire in the protected room
	Normative volumetric fire extinguishing concentration Cn, % vol.	The product of the minimum volumetric fire extinguishing concentration of GOS by a safety factor equal to 1.2
	Normative mass fire extinguishing concentration q N, kg × m -3	The product of the normative volume concentration of HOS and the density of HOS in the gas phase at a temperature of 20 °C and a pressure of 0.1 MPa
	Leakage parameter of the room d= S F H / V P ,m -1	The value characterizing the leakage of the protected premises and representing the ratio of the total area of ​​permanently open openings to the volume of the protected premises
	Leakage degree, %	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
	Reserve GOS		GOST 12.3.046-91
	GOS stock		GOST 12.3.046-91
	Maximum GOS jet size	The distance from the nozzle to the section where the speed of the 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 should 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 according to GOST 27331 and electrical equipment (electrical installations with a voltage not higher than those specified in the TD for the used GOS), with a leakage parameter of not 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: - fibrous, loose, porous and other combustible materials prone to spontaneous combustion and (or) smoldering inside the volume of the substance (sawdust, cotton, grass flour, etc.); - chemicals and their mixtures, polymeric materials prone to smoldering and burning without air access; - metal hydrides and pyrophoric substances; - metal powders (sodium, potassium, magnesium, titanium, etc.).

5. AUGP DESIGN

5.1. GENERAL PROVISIONS AND REQUIREMENTS

5.1.1. Design, installation and operation of AUGP should be carried out in accordance with the requirements of these Standards, other applicable regulatory documents in terms of gas fire extinguishing installations, and taking into account the technical documentation for the elements of AUGP. 5.1.2. AUGP includes: - modules (batteries) for storing and supplying gas fire extinguishing composition; - distribution devices; - main and distribution pipelines with the necessary fittings; - nozzles for the release and distribution of GOS in the protected volume; - fire detectors, technological sensors, electrocontact manometers, etc.; - devices and devices for control and management of AUGP; - devices that generate command impulses to turn off ventilation, air conditioning, air heating and process equipment in the protected room; - devices that generate and issue command pulses for closing fire dampers, dampers of ventilation ducts, etc.; - devices for signaling the position of doors in the protected room; - devices for sound and light alarms and warnings about the operation of the installation and the start of gas; - fire alarm loops, electrical supply circuits, control and monitoring AUGP. 5.1.3. The performance 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 applicable regulatory documents. 5.1.4. The initial data for the calculation and design of AUGP are: - the geometric dimensions of the room (length, width and height of enclosing structures); - design of floors and location of engineering communications; - the area of ​​permanently open openings in the enclosing structures; - maximum allowable pressure in the protected room (based on the strength of building structures or equipment located in the room); - range of temperature, pressure and humidity in the protected room and in the room where the AUGP components are located; - list and indicators of fire hazard of substances and materials in the room, and the corresponding fire class according to GOST 27331; - type, size and scheme of distribution of the brew load; - normative volumetric fire extinguishing concentration of GOS; - availability and characteristics of ventilation, air conditioning, air heating systems; - characteristics and placement of technological equipment; - the category of premises according to NPB 105-95 and the classes of zones according to PUE-85; - the presence of people and ways of their evacuation. 5.1.5. Calculation of AUGP includes: - determination of the estimated mass of the GOS required to extinguish a fire; - determination of the duration of the filing of the CES; - determination of the diameter of the pipelines of the installation, the type and number of nozzles; - determination of the maximum overpressure when applying the GOS; - determination of the required reserve of HOS and batteries (modules) for centralized installations or the stock of HOS 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 the recommended appendix 4. For a high-pressure plant with carbon dioxide and other gases, the calculation is made according to the methods agreed in the prescribed manner. 5.1.6. AUGP must ensure the supply to the protected premises of at least the estimated mass of the GOS intended for extinguishing a fire, for the time specified in paragraph 2 of the mandatory Appendix 1. 5.1.7. AUGP should ensure the delay in the release of GOS for the time necessary to evacuate people after the light and sound alerts, stop the ventilation equipment, close the 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 for stopping ventilation equipment, closing air dampers, fire dampers, etc. Exceeds 30 s, then the mass of the GOS should be calculated from the condition of the ventilation and (or) leaks available at the time of the release of the GOS. 5.1.8. The equipment and the length of the pipelines must be selected from 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. It is allowed to use high-pressure hoses to connect the modules with a collector or a main pipeline. The conditional passage 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 on welding or threaded connections. 5.1.12. Pipelines and their connections in AUGP must provide strength at a pressure equal to 1.25 R RAB, and tightness at a pressure equal to R RAB. 5.1.13. According to the method of storing the gas fire extinguishing composition, AUGP are divided into centralized and modular. 5.1.14. AUGP equipment with centralized storage of GOS should be placed in fire extinguishing stations. The premises of fire extinguishing stations must be separated from other premises by fire partitions of the 1st type and floors of the 3rd type. The premises of fire extinguishing stations, 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 ground 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 maintenance work. The exit from the station should be provided outside, to the stairwell, which has access to the outside, to the lobby or to the corridor, provided that the distance from the exit from the station to the stairwell does not exceed 25 m and there are no exits to rooms of categories A, B and B, except for rooms equipped with automatic fire extinguishing installations. Note. It is allowed to install an isothermal storage tank for GOS outdoors with a canopy for protection from precipitation and solar radiation with a mesh fence 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. at least 100 lux for fluorescent lamps or at least 75 lux for incandescent lamps. Emergency lighting must comply with the requirements of SNiP 23.05.07-85. The station premises must be equipped with supply and exhaust ventilation with at least two air exchanges for 1 hour. The stations must be equipped with a telephone connection with the duty personnel room, which is on duty around the clock. At the entrance to the station premises, a light panel "Fire extinguishing station" should be installed. 5.1.16. The equipment of modular gas fire extinguishing installations can be located both in the protected room and outside it, in close proximity to it. 5.1.17. The placement of local start-up devices for modules, batteries and switchgear 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 operational characteristics for a specific GOS, specified in the technical documentation for the nozzles. 5.1.20. Nozzles should be placed in the protected room in such a way as to ensure the concentration of HOS throughout the volume of the room is not lower than the standard. 5.1.21. The difference in flow rates between the two extreme nozzles on the same distribution pipeline should not exceed 20%. 5.1.22. The AUGP should be provided with devices that exclude the possibility of clogging of nozzles during the release of GOS. 5.1.23. In one room, nozzles of only one type should be used. 5.1.24. When nozzles are located in places of their possible mechanical damage, they must be protected. 5.1.25. The painting of the components of the installations, including pipelines, must comply with GOST 12.4.026 and industry standards. Unit piping and modules located in rooms with special aesthetic requirements can be painted in accordance with these requirements. 5.1.26. Protective paint must be applied to all external surfaces of pipelines 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 a centralized type, in addition to the calculated one, must have a 100% reserve of gas fire extinguishing composition. Batteries (modules) for storing the main and backup GOS must have cylinders of the same size and be filled with the same amount of gas fire extinguishing composition. 5.1.29. AUGP of modular type, which have gas fire extinguishing modules of the same standard size at the facility, must have a stock of GOS at the rate of 100% replacement in the installation that protects the room of the largest volume. If at one facility there are several modular installations with modules of different sizes, then the stock of HOS should ensure the restoration of the operability of the installations that protect the premises of the largest volume with modules of each size. The stock of GOS should be stored in the warehouse of the facility. 5.1.30. If it is necessary to test the AUGP, the GOS reserve for these tests is taken from the condition of protecting the premises of the smallest volume, if there are no other requirements. 5.1.31. The equipment used for AUGP must have a service life of at least 10 years.

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

5.2.1. AUGP electrical control means should provide: - automatic start-up of the installation; - disabling and restoring the automatic start mode; - automatic switching of the power supply from the main source to the backup one when the voltage is turned off at the main source, followed by switching to the main power source when the voltage is restored on it; - remote start of the installation; - turning off the sound alarm; - delay in the release of GOS for the time required to evacuate people from the premises, turn off ventilation, etc., but not less than 10 s; - formation of a command pulse at the outputs of electrical equipment for use in control systems for technological and electrical equipment of the facility, fire alarm systems, smoke removal, air overpressure, as well as to turn 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 should 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. In the presence of a closed system that serves only this room, it is allowed not to turn off ventilation, air conditioning, air heating after the GOS is supplied 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 one 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 premises or the premises to which the protected channel, underground, space belongs. false ceiling. It is allowed to place remote start devices in the premises of the personnel on duty with the obligatory indication of the AUGP operating mode. 5.2.4. Devices for remote start-up of 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 room, the AUGP should provide blocking of the automatic start-up of the installation with 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 the AUGP automatic start recovery devices, these devices can be placed at the entrances to the protected premises. 5.2.8. AUGP equipment should provide automatic control of: - the integrity of fire alarm loops along their entire length; - integrity of electric starting circuits (for breakage); - air pressure in the incentive network, starting cylinders; - light and sound signaling (automatically or on call). 5.2.9. If there are several directions for the supply of GOS, the batteries (modules) and switchgear installed in the fire extinguishing station must have plates 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 should be provided in accordance with GOST 12.4.009. Adjacent rooms that have access only through protected rooms, as well as rooms with protected channels, undergrounds and spaces behind a false ceiling, should be equipped with a similar alarm system. At the same time, the light panel "Gas - go away!", "Gas - do not enter" and the warning sound alarm device are installed common for the protected room and protected spaces (channels, underground, behind the false ceiling) of this room, and when protecting only these 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, it is necessary to provide a light indication of the AUGP operating mode. 5.2.12. In the premises of gas fire extinguishing stations there should be light signaling , fixing: - the presence of voltage at the inputs of the working and backup power sources; - breakage of electric circuits of squibs or electromagnets; - pressure drop in incentive pipelines by 0.05 MPa and launch cylinders by 0.2 MPa with decoding by directions; - operation of AUGP with decoding in directions. 5.2.13. In the premises of the fire station or other premises with personnel on duty around the clock, light and sound alarms should be provided: - about the occurrence of a fire with decoding in directions; - about the operation of the AUGP, with a breakdown in directions and the receipt of the CRP in the protected premises; - about the disappearance of the voltage of the main power source; - about the malfunction of the AUGP with decoding in directions. 5.2.14. In AUGP, sound signals about a fire and the operation of the installation must differ in tone from signals about a malfunction. 5.2.15. In a room with personnel on duty around the clock, only light signaling should also be provided: - about the mode of operation of the AUGP; - about turning off the sound alarm about a fire; - about turning off the audible alarm about a malfunction; - about the presence of voltage on the main and backup power sources. 5.2.16. AUGP should refer to electricity consumers of the 1st category of power supply reliability in accordance with PUE-85. 5.2.17. In the absence of a backup input, it is allowed to use autonomous power sources that ensure the operability 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. The protection of electrical circuits must be carried out in accordance with PUE-85. The device of thermal and maximum protection in the control circuits is not allowed, the disconnection of which can lead to a failure in the supply of HOS 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 the technical documentation for the equipment. 5.2.20. The choice of wires and cables, as well as the methods of their laying, 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. 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 that replaces it. 5.2.22. The premises of the fire station 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, combustible load, the presence and dimensions of open openings in the protected premises must comply with the design and must be controlled during commissioning of the AUGP. 5.3.3. Leakage of rooms equipped with AUGP should not exceed the values ​​specified in clause 4.2. Measures should be taken to eliminate technologically unjustified openings, door closers, etc. should be installed. The premises, if necessary, should have pressure relief devices. 5.3.4. In the air duct systems of general ventilation, air heating and air conditioning of protected premises, air shutters or fire dampers should be provided. 5.3.5. To remove the GOS after the end of the work of the AUGP, it is necessary to use general 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 forth in: - "Rules for the design and safe operation of pressure vessels"; - "Rules for the technical operation of consumer electrical installations"; - "Safety regulations for the operation of electrical installations of consumers of Gosenergonadzor"; - "Uniform safety rules for blasting (when used in installations of squibs"); - 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 Norms; - the current regulatory and technical documentation approved in the prescribed manner in terms of AUGP. 5.4.2. Local start-up devices of 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 the GOS into it and the elimination of the fire until the end of the ventilation is allowed only in insulating respiratory protective equipment. 5.4.4. Entry into the premises without insulating respiratory protection is allowed only after the removal of combustion products and decomposition of the GOS to a safe value.

ATTACHMENT 1
Mandatory

Method for calculating the parameters of AUGP when extinguishing by volumetric method

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

M G \u003d Mp + Mtr + M 6 × n, (1)

Where Мр is the estimated mass of the GOS, intended for extinguishing a fire by volumetric method in the absence of artificial air ventilation in the room, is determined: for ozone-friendly freons and sulfur hexafluoride according to the formula

Mp \u003d K 1 × V P × r 1 × (1 + K 2) × C N / (100 - C N) (2)

For carbon dioxide according to the formula

Mp \u003d K 1 × V P × r 1 × (1 + K 2) × ln [ 100 / (100 - C H) ] , (3)

Where V P is the estimated volume of the protected premises, m 3. The calculated volume of the 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 deducted from it, with the exception of the volume of solid (impermeable) building non-combustible elements (columns, beams, foundations, etc.); K 1 - coefficient taking into account the leakage of the gas fire extinguishing composition from the cylinders through leaks in the valves; K 2 - coefficient taking into account the loss of gas fire extinguishing composition through leaks in the room; r 1 - the density of the gas fire extinguishing composition, taking into account the height of the protected object relative to sea level, kg × m -3, is determined by the formula

r 1 \u003d r 0 × T 0 / T m × K 3, (4)

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

M tr = V tr × r GOS, (5)

Where V tr is the volume of AUGP pipelines from the nozzle closest to the installation to the final nozzles, m 3; r GOS is the density of the GOS residue at the pressure that exists in the pipeline after the estimated mass of the gas fire extinguishing composition has flowed into the protected room; M b × n - the product of the balance of 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 premises where during normal operation 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 premises. Note. The normative volumetric fire extinguishing concentration СН for combustible 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 by 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 leaks of the gas fire extinguishing composition from the vessels through leaks in the shutoff valves and the uneven distribution of the gas fire extinguishing composition over the volume of the protected room:

1.1.2. Coefficient taking into account the loss of gaseous fire extinguishing composition through leaks in the room:

K 2 \u003d 1.5 × F (Sn, g) × d × t POD ×, (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 \u003d t V / t GOS, m 0.5 × s -1, - the ratio of the ratio of the molecular weights of air and GOS; d = S F H / V P - room leak parameter, m -1 ; S F H - total area of ​​leakage, m 2 ; H - the height of the room, m. The coefficient Ф (Сн, g) is determined by the formula

F(Sn, y) = (7)

Where \u003d 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. GOS freons and sulfur hexafluoride; t POD £ 15 s for centralized AUGPs using freons and sulfur hexafluoride as GOS; t POD £ 60 s for AUGP using carbon dioxide as a GOS. 3. The mass of the gas fire extinguishing composition intended for extinguishing a fire in a room with forced ventilation in operation: for freons and sulfur hexafluoride

Mg \u003d K 1 × r 1 × (V p + Q × t POD) × [ C H / (100 - C H) ] (8)

For carbon dioxide

Mg \u003d K 1 × r 1 × (Q × t POD + V p) × ln [ 100/100 - C H) ] (9)

Where Q is the volume flow of air removed from the room by ventilation, m 3 × s -1. 4. Maximum overpressure when supplying gas compositions with room leaks:

< Мг /(t ПОД × j × ) (10)

Where j \u003d 42 kg × m -2 × C -1 × (% vol.) -0.5 is determined by the formula:

Pt \u003d [C N / (100 - C N)] × Ra or Pt \u003d Ra + D Pt, (11)

And with the leakage of the room:

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 pipelines and nozzles. The release time is determined during the hydraulic calculations of the installation and should not exceed the value specified in paragraph 2. Appendix 1.

APPENDIX 2
Mandatory

Table 1

Normative 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
Organoplast 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

Normative 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	Regulatory fire extinguishing concentration Cn
		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
Cellulose (paper, wood)

Table 3

Normative 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	Regulatory fire extinguishing concentration Cn
		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
Cellulose (paper, wood)	OST 81-92-74

Table 4

Normative volumetric fire extinguishing concentration of freon 318C (C 4 F 8 C) at t \u003d 20 ° C and P \u003d 0.1 MPa

Name of combustible material	GOST, TU, OST	Regulatory fire extinguishing concentration Cn
		volume, % vol.	mass, kg × m -3
N-heptane	GOST 25823-83
ethanol
Acetone
Kerosene
Toluene
PMMA
Rubber IRP-1118
Cellulose (paper, wood)
Getinaks
Styrofoam

APPENDIX 3
Mandatory

General requirements for the installation of local fire extinguishing

1. Local fire extinguishing installations by volume are used to extinguish the fire of individual units or equipment in cases where the use of volumetric fire extinguishing installations is technically impossible or economically impractical. 2. The estimated volume of local fire extinguishing is determined by the product of the base area of ​​the protected unit or equipment by their height. In this case, all the 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 normative mass fire extinguishing concentration during local extinguishing by volume with carbon dioxide is 6 kg/m 3 . 5. The time of filing the GOS during local extinguishing should not exceed 30 s.

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

1. The average (during the supply time) pressure in the isothermal tank p t, MPa, is determined by the formula

p t \u003d 0.5 × (p 1 + p 2), (1)

Where p 1 is the pressure in the tank during storage of carbon dioxide, MPa; p 2 - pressure in the tank at the end of the release of the calculated amount of carbon dioxide, MPa, is determined from fig. one.

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

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

Q t \u003d t / t, (2)

Where m is the mass of the main stock 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 \u003d 9.6 × 10 -3 × (k 4 -2 × Q t × l 1) 0.19, (3)

Where k 4 is a multiplier, determined from the table. one; l 1 - the 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) \u003d 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 \u003d l 1 + 69 × d i 1.25 × e 1, (5)

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

p t \u003d 0.5 × (p s + p 4), (6)

Where p z - pressure at the point of entry of the main pipeline into the protected premises, 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 \u003d 4.1 × 10 -3 × m × k 5 × A 3 , (7)

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

k 5 \u003d 0.93 + 0.3 / (1.025 - 0.5 × p ¢ t) . (8)

7. The number of nozzles is determined by the formula

x 1 \u003d Q t / Q ¢ t.

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

d ¢ I ³ 1.4 × d Ö x 1 , (9)

Where d is the nozzle outlet diameter. Note. The relative mass of carbon dioxide t 4 is determined by the formula t 4 \u003d (t 5 - t) / t 5, where t 5 is the initial mass of carbon dioxide, kg.

APPENDIX 5
Reference

Table 1

The main 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 of measurement
Molecular mass
Vapor density at Р = 1 atm and t = 20 °С
Boiling point at 0.1 MPa
Melting temperature
Critical temperature
critical pressure
Liquid density at P cr and t cr
Specific heat capacity of a liquid	kJ × kg -1 × °С -1
	kcal × kg -1 × °С -1
Specific heat capacity of gas at Р = 1 atm and t = 25 °С	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 × °С -1
	kcal × m -1 × s -1 × °С -1
Dynamic viscosity of gas	kg × m -1 × s -1
Relative dielectric constant at Р = 1 atm and t = 25 °С	e × (e air) -1
Partial vapor pressure at t = 20 °C
Breakdown voltage of HOS vapors relative to gaseous nitrogen	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

The values ​​of the functional coefficient Ф (Сн, g) for freon 318Ц (С 4 F 8 Ц)

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

Table 4

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

Volume concentration of freon 125 Cn, % vol.		The volume concentration of freon is 125 Cn,% vol.	Functional coefficient (Сн, g)

Table 5

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

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

Table 6

The 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) Cn, % vol.	Functional coefficient Ф(Сн, g)

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

MINISTRY OF THE INTERIOR
RUSSIAN FEDERATION

STATE FIRE SERVICE

FIRE SAFETY STANDARDS

AUTOMATIC GAS FIRE EXTINGUISHING INSTALLATIONS

REGULATIONS AND RULES FOR DESIGN AND APPLICATION

NPB 22-96

MOSCOW 1997

Developed by the All-Russian Research Institute of Fire Defense (VNIIPO) of the Ministry of Internal Affairs of Russia.

Submitted 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 of the Russian Federation for fire supervision.

Agreed with the Ministry of Construction of Russia (letter No. 13-691 dated 12/19/1996).

They were put into effect by order of the GUGPS of the Ministry of Internal Affairs of Russia dated December 31, 1996 No. 62.

Centralized automatic gas fire extinguishing installation

Modular automatic gas fire extinguishing installation

Gas fire extinguishing battery

Gas extinguishing module

Gas fire extinguishing composition (GOS)

Device for the release and distribution of GOS in a protected room

Inertia AUGP

The time from the moment the signal is generated to start the AUGP until the start of the expiration of the GOS from the nozzle into the protected room, excluding the delay time

Duration (time) of submission of state documents t under, with

The time from the beginning of the expiration of the GOS from the nozzle until the moment the estimated mass of the GOS is released from the installation, which is necessary to extinguish a fire in the protected room

Normative volumetric fire extinguishing concentration Sn, % vol.

The product of the minimum volumetric fire extinguishing concentration of GOS by a safety factor equal to 1.2

Normative mass fire extinguishing concentration q N, kg × m -3

The product of the standard volumetric concentration of HOS and the density of HOS in the gas phase at a temperature of 20 ° C and pressure 0.1 MPa

Room leakage parameter

d= SF H /V P , m -1

The value characterizing the leakage of the protected premises and representing the ratio of the total area of ​​permanently open openings to the volume of the protected premises

Leakage degree, %

The ratio of the area of ​​permanently open openings to the area of ​​enclosing structures

Maximum overpressure in the room R m, MPa

The maximum value of pressure in the protected room when the calculated amount of GOS is released into it

Reserve GOS

GOST 12.3.046-91

GOS stock

GOST 12.3.046-91

Maximum GOS jet size

The distance from the nozzle to the section where the speed of the gas-air mixture is at least 1.0 m/s

Local, start (switch on)

4. GENERAL REQUIREMENTS

4.1. The equipment of buildings, structures and premises of the AUGP should be carried out in accordance with the design documentation developed and approved in accordance with SNiP 11-01-95.

Type, size and scheme of distribution of the brew load;

Normative volumetric fire extinguishing concentration of GOS;

Availability and characteristics of ventilation, air conditioning, air heating systems;

Characteristics and placement of technological equipment;

The category of premises according to NPB 105-95 and the classes of zones according to PUE -85;

Presence of people and ways of their evacuation.

5.1.5. AUGP calculation includes:

Determination of the estimated mass of the GOS required to extinguish the fire;

Determination of the duration of the filing of the CES;

Determining the diameter of the pipelines of the installation, the type and number of nozzles;

Determination of the maximum overpressure when applying GOS;

Determining the required reserve of HOS and batteries (modules) for centralized installations or the stock of HOS and modules for modular installations;

Determining the type and number of fire detectors or sprinklers required for the incentive system.

Note. The method for calculating the diameter of pipelines and the number of nozzles for a low pressure carbon dioxide plant is given in the recommended appendix. For a high pressure installation with carbon dioxide and other gases, the calculation is carried out according to the methods agreed in the prescribed manner.

5.1.6. AUGP must ensure the supply to the protected premises of at least the calculated mass of the GOS intended for extinguishing a fire, for the time specified in the paragraph of the mandatory application.

5.1.7. AUGP should ensure the delay in the release of GOS for the time necessary to evacuate people after the light and sound alerts, stop the ventilation equipment, close the 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 for stopping ventilation equipment, closing air dampers, fire dampers, etc. Exceeds 30 s, then the mass of the GOS should be calculated from the condition of the ventilation and (or) leaks available at the time of the release of the GOS.

5.1.8. The equipment and the length of the pipelines must be selected from 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. It is allowed to use high-pressure hoses to connect the modules with a collector or a main pipeline.

The conditional passage 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 on welding or threaded connections.

5.1.12. Pipelines and their connections in AUGP must provide strength at a pressure equal to 1.25 R RAB, and tightness at a pressure equal to R WORK.

5.1.13. According to the method of storing the gas fire extinguishing composition, AUGP are divided into centralized and modular.

5.1.14. AUGP equipment with centralized storage of GOS should be placed in fire extinguishing stations.

The premises of fire extinguishing stations must be separated from other premises by fire partitions of the 1st type and floors of the 3rd type.

The premises of fire extinguishing stations, 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 ground 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 maintenance work. The exit from the station should be provided outside, to the stairwell, which has access to the outside, to the lobby or to the corridor, provided that the distance from the exit from the station to the stairwell does not exceed 25 m and there are no exits to rooms of categories A, B and B, with the exception of rooms equipped with automatic fire extinguishing installations.

Note. It is allowed to install an isothermal storage tank for GOS outdoors with a canopy for protection from precipitation and solar radiation with a mesh fence 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 tank is determined by the height of the tank itself, taking into account the distance from it to the ceiling of at least 1 m.

The temperature in the premises should be from 5 to 35 °С, the relative humidity of the air should not exceed 80% at 25 °С, the illumination should be at least 100 lux with fluorescent lamps or at least 75 lux with incandescent lamps.

Emergency lighting must comply with the requirements of SNiP 23.05.07-85.

The station premises must be equipped with supply and exhaust ventilation with at least two air exchanges for 1 hour.

Stations must be equipped with a telephone connection with a room for duty personnel who are on duty around the clock.

At the entrance to the station premises, a light panel "Fire extinguishing station" should be installed.

5.1.16. The equipment of modular gas fire extinguishing installations can be located both in the protected room and outside it, in close proximity to it.

5.1.17. The placement of local start-up devices for modules, batteries and switchgear 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 the type of nozzles is determined by their performance characteristics for a specific GOS, specified in the technical documentation for the nozzles.

5.1.20. Nozzles should be placed in the protected room in such a way as to ensure the concentration of HOS throughout the volume of the room is not lower than the standard.

5.1.21. The difference in flow rates between the two extreme nozzles on the same distribution pipeline should not exceed 20%.

5.1.22. The AUGP should be provided with devices that exclude the possibility of clogging of nozzles during the release of GOS.

5.1.23. In one room, nozzles of only one type should be used.

5.1.24. When nozzles are located in places of their possible mechanical damage, they must be protected.

5.1.25. The painting of the components of the installations, including pipelines, must comply with GOST 12.4.026 and industry standards.

Unit piping and modules located in rooms with special aesthetic requirements can be painted in accordance with these requirements.

5.1.26. Protective paint must be painted on all external surfaces of pipelines 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 a centralized type, in addition to the calculated one, must have a 100% reserve of gas fire extinguishing composition. Batteries (modules) for storing the main and backup GOS must have cylinders of the same size and be filled with the same amount of gas fire extinguishing composition.

5.1.29. AUGP of modular type, which have gas fire extinguishing modules of the same standard size at the facility, must have a stock of GOS at the rate of 100% replacement in the installation that protects the room of the largest volume.

If at one facility there are several modular installations with modules of different sizes, then the stock of HOS should ensure the restoration of the operability of the installations that protect the premises of the largest volume with modules of each size.

The stock of GOS should be stored in the warehouse of the facility.

5.1.30. If it is necessary to test the AUGP, the GOS reserve for these tests is taken from the condition of protecting the premises of the smallest volume, if there are no other requirements.

5.1.31. The equipment used for AUGP must have a service life of at least 10 years.

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

5.2.1. AUGP electrical controls must provide:

Automatic start of the installation;

Disabling and restoring the automatic start mode;

Automatic switching of power supply from the main source to the backup one in case of power outage at the main source, followed by switching to the main power source when the voltage is restored on it;

Remote start of the installation;

Disabling the sound alarm;

Delay in the release of GOS for the time required to evacuate people from the premises, turn off ventilation, etc., but not less than 10 s;

Formation of a command pulse at the outputs of electrical equipment for use in control systems for technological and electrical equipment of the facility, fire alarm systems, smoke removal, air overpressure, as well as to turn off ventilation, air conditioning, air heating;

Automatic or manual deactivation of sound and light alarms about fire, operation and malfunction of the installation.

Notes: 1. Local start 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 room, the modules (batteries) must have a local start.

3. If there is a closed system that serves only this room, it is allowed not to turn off the ventilation, air conditioning, air heating after the GOS is supplied 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 one 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 premises or the premises, which include the protected channel, underground, space behind the false ceiling.

It is allowed to place remote start devices in the premises of the personnel on duty with the obligatory indication of the AUGP operating mode.

5.2.4. Devices for remote start-up of 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 room, the AUGP should provide blocking of the automatic start-up of the installation with indication of the blocked state according to p.

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 the AUGP automatic start recovery devices, these devices can be placed at the entrances to the protected premises.

5.2.8. AUGP equipment should provide automatic control of:

Integrity of fire alarm loops along their entire length;

Integrity of electric starting circuits (for breakage);

Air pressure in the incentive network, starting cylinders;

Light and sound signaling (automatically or on call).

5.2.9. If there are several directions for the supply of GOS, the batteries (modules) and switchgear installed in the fire extinguishing station must have plates 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 should be provided in accordance with GOST 12.4.009.

Adjacent rooms that have access only through protected rooms, as well as rooms with protected channels, undergrounds and spaces behind a false ceiling, should be equipped with a similar alarm system. At the same time, the light panel "Gas - go away!", "Gas - do not enter" and the warning sound alarm device are installed common for the protected room and protected spaces (channels, underground, behind the false ceiling) of this room, and when protecting only these spaces - common for these spaces.

The presence of voltage at the inputs of the working and backup power sources;

Breakage of electrical circuits of squibs or electromagnets;

Pressure drop in incentive pipelines by 0.05 MPa and launch cylinders by 0.2 MPa with decoding by directions;

Operation of AUGP with decoding in directions.

5.2.13. In the premises of the fire station or other premises with personnel on duty around the clock, light and sound alarms should be provided:

About the occurrence of a fire with decoding in directions;

On the operation of the AUGP, with a decoding in the directions and the receipt of the GOS in the protected premises;

About the disappearance of the voltage of the main power source;

About the malfunction of the AUGP with decoding in directions.

5.2.14. In AUGP, sound signals about a fire and the operation of the installation must differ in tone from signals about a malfunction.

On the mode of operation of the AUGP;

On turning off the sound alarm about a fire;

On disabling the audible alarm about a malfunction;

On the presence of voltage on the main and backup power sources.

5.2.16. AUGP should refer to consumers of electricity of the 1st category of reliability of power supply in accordance with PUE-85.

5.2.17. In the absence of a backup input, it is allowed to use autonomous power sources that ensure the operability 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. The protection of electrical circuits must be carried out in accordance with PUE -85.

The device of thermal and maximum protection in the control circuits is not allowed, the disconnection of which can lead to a failure in the supply of HOS 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 the technical documentation for the equipment.

5.2.20. The choice of wires and cables, as well as the methods of their laying, 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. 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 that replaces 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. And .

5.3.2. Volumes, areas, combustible load, the presence and dimensions of open openings in the protected premises must comply with the design and must be controlled during commissioning of the AUGP.

5.3.3. Leakage of premises equipped with AUGP should not exceed the values ​​specified in paragraph . Measures should be taken to eliminate technologically unjustified openings, door closers, etc. should be installed. The premises, if necessary, should have pressure relief devices.

5.3.4. In the air duct systems of general ventilation, air heating and air conditioning of protected premises, air shutters or fire dampers should be provided.

5.3.5. To remove the GOS after the end of the work of the AUGP, it is necessary to use general 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 forth in:

- "Rules for the Design and Safe Operation of Pressure Vessels";

- "Rules for the technical operation of consumer electrical installations";

- "Safety regulations for the operation of electrical installations of consumers of Gosenergonadzor";

- "Uniform safety rules for blasting (when used in installations of squibs");

these Regulations;

The current regulatory and technical documentation, approved in the prescribed manner in terms of AUGP.

5.4.2. Local start-up devices of 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 the GOS into it and the elimination of the fire until the end of the ventilation is allowed only in insulating respiratory protective equipment.

5.4.4. Entry into the premises without insulating respiratory protection is allowed only after the removal of combustion products and decomposition of the GOS to a safe value.

ATTACHMENT 1
Mandatory

Method for calculating the parameters of AUGP when extinguishing by volumetric method

1. Mass of gas fire extinguishing composition (Mg), which should be stored in the AUGP, is determined by the formula

1.1. Equation coefficients () are defined as follows.

1.1.1. Coefficient taking into account leaks of the gas fire extinguishing composition from the vessels through leaks in the shutoff valves and the uneven distribution of the gas fire extinguishing composition over the volume of the protected room:

K 1= 1,05.

1.1.2. Coefficient taking into account the loss of gaseous fire extinguishing composition through leaks in the room:

K 2 = 1,5 × F(Sn,g ) × d × t UNDER × , (6)

where F(Sn, g ) - functional coefficient depending on the standard volumetric concentration C N and the ratio of molecular weights of air and gas fire extinguishing composition;g = t W / t GOS, m 0.5× c -1 , - the ratio of the ratio of the molecular weights of air and GOS;d = S F H/ V P- parameter of leakage of the room, m -1;S F H- total area of ​​leakage, m 2 ; H - room height, m.

Coefficient F(Sn, g ) is determined by the formula

F(Sn, y) = (7)

where = 0,01 × C N / g - relative mass concentration of GOS.

Numerical values ​​of the coefficient F(Sn, g ) are given in the reference appendix.

t UNDER£ 10 s for modular AUGP using freons and sulfur hexafluoride as GOS;

t UNDER£ 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 the gas fire-extinguishing composition intended for extinguishing a fire in a room with a working forced ventilation:

for freons and sulfur hexafluoride

Mg = K 1 × r 1 × ( VR+Q × t UNDER ) × [ CH/(100 - CH) ] (8)

for carbon dioxide

Mg = K 1 × r 1 × (Q × t UNDER + VR)× ln [ 100/100 - CH ) ] (9)

where Q - volume flow rate of air removed from the room by ventilation, m 3× with -1 .

4. Maximum overpressure when supplying gas compositions with room leaks:

< Mg /(t UNDER × j× ) (10)

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

Rt = [C N /(100 - C N) ] × Ra or Pt = Ra + D rt,(11)

and with room leakage:

³ Mg/(t UNDER × j× ) (12)

is 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 pipelines and nozzles. The release time is determined during the hydraulic calculations of the installation and should not exceed the value specified in paragraph . applications .

APPENDIX 2
Mandatory

Table 1

Regulatory volumetric fire extinguishing concentration of freon 125 (from 2 F5h) at t= 20 ° C and R= 0.1 MPa

	GOST, TU, OST	Sn
		volume, % vol.	Mass, kg × m -3
	GOST 18300-72
	GOST 25823-83
vacuum oil
Cotton fabric
Organoplast TOPS-Z
Textolite B	GOST 2910-67
Rubber IRP-1118	TU 38-005924-73
Nylon fabric P-56P	TU 17-04-9-78

table 2

Normative 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	Normative fire extinguishing concentration Sn
		volume, % vol.	mass, kg × m -3
transformer oil
	GOST 18300-72
	TU 38-005924-73
Rubber IRP-1118
Cotton fabric	GOST 2910-67
Textolite B	OST 81-92-74
Cellulose (paper, wood)

Table 3

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

Name of combustible material	GOST, TU, OST	Normative fire extinguishing concentration Sn
		volume, % vol.	Mass, kg × m -3
	GOST 18300-72
Rubber IRP-1118	TU 38-005924-73
Cotton fabric
Textolite B	GOST 2910-67
Cellulose (paper, wood)	OST 81-92-74

Table 4

Normative volumetric fire extinguishing concentration of freon 318C (from 4F 8 C) at t = 20 ° FROM And P = 0.1 MPa

Name of combustible material	GOST, TU, OST	Normative fire extinguishing concentration Sn
		volume, % vol.	mass, kg × m -3
	GOST 25823-83
Rubber IRP-1118
Cellulose (paper, wood)
Getinaks
Styrofoam
Factor k4

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

p s (p 4) = 2 + 0,568 × 1p , (4)

where l 2 - equivalent length of pipelines from the isothermal tank to the point where the pressure is determined, m:

l 2 \u003d l 1 + 69 × d i 1.25× e 1 , (5)

where e 1 - the sum of the coefficients of resistance of the fittings of pipelines.

5. Medium pressure

p t = 0,5 × (r z + p 4), (6)

where r s - pressure at the entry point of the main pipeline into the protected premises, MPa; p 4 - pressure at the end of the main pipeline, MPa.

6. Average flow through nozzles Q T,kg/s, determined by the formula

Q¢ T = 4,1 × 10 -3 × m× k 5 × A 3 , (7)

where m- coefficient of flow through nozzles; and 3 - nozzle outlet area, m;k 5 - coefficient determined by the formula

k 5 = 0,93 + 0,3/(1,025 - 0,5 × R¢ T) . (8)

7. The number of nozzles is determined by the formula

x 1 = QT/Q¢ T.

8. Distribution pipe inner diameter ( d¢ i, m, calculated from the condition

d¢ I³ 1,4 × dÖ x 1 , (9)

where d- nozzle outlet diameter.

Note. Relative mass of carbon dioxide t 4 is determined by the formula t 4 = (t 5 - t) / t 5, where t 5 - initial mass of carbon dioxide, kg.

APPENDIX 5
Reference

Table 1

Basic thermophysical and thermodynamic properties of freon 125 (from 2 F 5 H), sulfur hexafluoride (SF6), carbon dioxide (CO 2) and freon 318C (from 4F 8 C)

Name	unit of measurement	From 2F 5 N			From 4F 8 C
Molecular mass
Vapor density at R= 1 atm and t = 20 ° FROM	kg × m -3
Boiling point at 0.1 MPa	° FROM
Melting temperature	° FROM
Critical temperature	° FROM
critical pressure
Liquid density at R cr And t cr	kg × t -3
Specific heat capacity of a liquid	kJ × kg -1 × ° C -1
	kcal × kg -1 × ° C -1
Specific heat capacity of gas at R= 1 atm and t= 25 ° FROM	kJ × kg -1 × ° C -1
	kcal × kg -1 × ° C -1
Latent heat of vaporization	kJ × kg
	kcal × kg
Gas thermal conductivity coefficient	Tue × m -1 × ° C -1
	kcal × m -1 × from -1 × ° C -1	1,56 × 10 -5	2,78 × 10 -5	3,35 × 10 6	2,78 × 10 6
Dynamic viscosity of gas	kg × m -1 × from -1		1,55 × 10 -5
Relative dielectric constant at R= 1 atm and t = 25 ° FROM	e × (e vzd) -1
Partial vapor pressure at t = 20 ° FROM
Breakdown voltage of HOS vapors relative to gaseous nitrogen	IN× (INN2)-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

F(Sn,g) for freon 318C (from 4F 8 C)

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

Table 4

The value of the functional coefficient F(Sn,g) for freon 125 (from 2F 5 N)

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

Table 5

Function coefficient values F(Sn,g) for carbon dioxide (CO 2)

(CO 2) CH,% about.	Functional coefficient (Sn,g)	Volume concentration of carbon dioxide (СО 2) Сн, % about.	Functional coefficient (Sn,g)

Table 6

Function coefficient values F(Sn,g) for sulfur hexafluoride (SF6)

..

(SF 6) Sn, % about.	Functional coefficient F(Sn,g)	Volume concentration of sulfur hexafluoride (SF 6) Sn, % about.	Functional coefficient F(Sn,g)

For design and installation gas systems To extinguish a fire, contact only specialized organizations. For this type of work, our design and installation bureau of engineering systems has a special license. Specialists will make correct calculations of the area and the required amount of equipment, determine the flow rate and type of gas mixtures, the working conditions of personnel, temperature regime buildings and take into account other important factors for the installation of fire-fighting gas equipment. Our bureau will also undertake warranty obligations for repair and maintenance.

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. According to the principle of the effect of gas compositions on combustion, they are divided into 2 groups:

1. Inhibitors (ignition suppressors). These are the substances that chemical reaction with burning substances and taking away the energy of combustion.

2. Deoxidants (oxygen pushers). These are substances that create a concentrated cloud around the fire that does not let in the flow of oxygen.

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

The use of gaseous fire extinguishing systems covers industries where contact of stored stocks with liquids or powders is unacceptable. First of all, these are:

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

Installations of gas fire extinguishing systems differ in the degree of mobility. Can be used portable modules extinguishing local fires. There are also self-propelled and towed fire engines. In places with explosives, in warehouses and storage facilities, it is more expedient 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 ignition is localized by displacing oxygen from the room. Most of the substances in the composition of the GOS are not toxic, however, gas fire extinguishing systems can create an environment unsuitable for life in a closed room (this applies to deoxidants). For this reason, when entering a room where gas equipment for fire extinguishing is installed, without fail place warning signs. Premises with installed gas fire extinguishing should be equipped with light screens: at the entrance "GAS! DO NOT ENTER! and at the exit “GAS! LEAVE!".

According to the 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 long time. Activities include:

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

When concluding a contract for the design and maintenance of a gas fire extinguishing system, we will carefully consider and write down all the 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 complex of equipment, the amount of work on installation and after-sales service. By concluding an agreement with the design and installation bureau of engineering systems, you will ensure your production facilities efficient system fire protection, which will be serviced by specialists.

This installation of automatic modular volumetric gas fire extinguishing in the premises of the Bank's reserve office was made on the basis of the project and in accordance with the regulatory documents:

• SP 5.13130.2009. “Automatic fire alarm and fire extinguishing installations. Norms and rules of design».
• GOST R 50969-96 “Automatic gas fire extinguishing installations. General technical requirements. Test Methods".
• GOST R 53280.3-2009 “Automatic fire extinguishing installations. Fire extinguishing agents. General technical requirements. Test Methods".
• GOST R 53281-2009 “Automatic gas fire extinguishing installations. modules and batteries. General technical requirements. Test Methods".
• SNiP 2.08.02-89* "Public buildings and structures".
• SNiP 11-01-95 "Instruction on the composition, procedure for development, approval and
• approval of project documentation for the construction of enterprises, buildings and structures.
• GOST 23331-87. “Fire engineering. Classification of fires.
• PB 03-576-03. "Rules for the Design and Safe Operation of Pressure Vessels".
• SNiP 3.05.05-84. "Technological equipment and technological pipelines".
• PUE-98. "Rules for the installation of electrical installations".
• SNiP 21-01-97*. "Fire safety of buildings and structures".
• SP 6.13130.2009. “Fire protection systems. Electrical equipment. Fire safety requirements.
• Federal Law of July 22, 2008 No. 123-FZ. "Technical regulations on fire safety requirements".
• PPB 01-2003. "Fire safety rules in the Russian Federation".
• VSN 21-02-01 of the Ministry of Defense of the Russian Federation “Automatic gas fire extinguishing installations for facilities of the Armed Forces of the Russian Federation. Norms and rules of design».

2. a brief description of protected premises

The following premises are subject to automatic gas fire extinguishing installation of a modular type:

3. Basic technical solutions taken in the project

According to the method of extinguishing in the protected premises, a volumetric gas fire extinguishing system was adopted. The volumetric gas fire extinguishing method is based on the distribution of the extinguishing agent and the creation of a fire extinguishing concentration throughout the entire volume of the room, which ensures effective extinguishing at any point, including hard-to-reach places. Freon 125 (C2F5H) is used as a fire extinguishing agent in the gas fire extinguishing installation. Automatic gas fire extinguishing installation includes:

– MGH modules with fire extinguishing agent Chladon125;

- Pipe wiring with nozzles installed on them for the release and uniform distribution of the fire extinguishing composition in the protected volume;

- devices and devices for monitoring and controlling the installation;

- devices for signaling the position of doors in the protected room;

- devices for sound and light signaling and notification of gas actuation and start-up.

For storage and release of GFFS, automatic gas fire extinguishing modules MGH with a capacity of 80 liters are used. The gas fire extinguishing module consists of a metal housing (cylinder), a shut-off and starter head. Lock- starting device has a manometer, a squib, a safety pin and a safety diaphragm. For the release and uniform distribution of gas over the volume of the protected premises, an exhaust pipeline is used. Ozone-non-destructive freon 125 with a standard concentration of GOTV equal to 9.8% (vol.) was adopted as a fire extinguishing agent. The release time of the estimated mass of freon 125 into the protected premises is less than 10 s. Fire detection in the protected premises is carried out using automatic firefighters. smoke detectors type IP-212, included in the fire alarm system network, the number and location of fire detectors (at least 3 in the protected room) is provided taking into account the interaction with the fire extinguishing installation. To control the automatic fire extinguishing installation and monitor its condition, a signal-starting security and fire device is used. The automatic control system for gas fire extinguishing operates according to the following algorithm:

– upon receipt of the “FIRE” signal in the protected premises, a light-sound warning signal is sent via the interface line from the APS system - “GAS GO OUT”, “GAS DO NOT ENTER”.

– Not less than 10 s. After the "FIRE" signal is received, a pulse is sent to the starters of the modules.

– Automatic start is disabled when the door to the protected room is opened and when the system is switched to the “AUTOMATIC DISABLED” mode;

– Manual (remote) start of the system is provided;

– Automatic switching of power supply from the main source (220 V) to the backup one (batteries) is provided, in case of power failure at the working input;

– Provides control of the electrical circuits of the starting module, light and sound signaling devices.

The remote start of the fire extinguishing and signaling system is carried out upon visual detection of a fire. To automatically close the doors of the premises, the project provides for the installation of an automatic door closing device (door closer). The signal from the control panel is transmitted to the alarm panel installed in a room with a round-the-clock stay of personnel on duty. The remote start panel (RPP) is installed at a height of not more than 1.5 m from the floor level next to the protected room. The issuance of signals to starting devices, light and sound annunciators is carried out by the trigger circuits of the control panel. Control of gas supply is carried out by universal pressure alarms (SDU).

4. Calculation of the amount of gas fire extinguishing composition and characteristics of gas fire extinguishing modules.

4.1.1. The hydraulic calculation was performed in accordance with the requirements of SP 5.13130-2009 (Appendix E). 4.1.2. We determine the mass of the GOS Mg, which should be stored in the installation according to the formula: Mg = K1*(Mp + Mtr. + Mbxn), where (1) Mp is the estimated mass of the GOS intended to extinguish a fire in the protected volume, kg; Mtr. - the rest of the GOS in pipelines, kg; Mb is the rest of the GOS in the cylinder, kg; n is the number of cylinders in the installation, pcs; K1 = 1.05 - coefficient taking into account leakage of gaseous fire extinguishing agent from vessels. For freon 125, the calculated mass of the GOS is determined by the formula: Мр = Vp х r1х(1+K2)хСн/(100-Сн), where (2) Vp is the volume of the protected premises, m3. r1 is the density of the HOS, taking into account the height of the protected object relative to sea level, kg/m3 and is determined by the formula: r1=r0xK3xTo/Tm, where (3) r0 is the density of the HOS at To= 293K(+20°C) and atmospheric pressure of 0.1013 MPa . r0=5.208 kg/m3; K3 is a correction factor that takes into account the height of the object relative to sea level. In calculations, it is taken equal to 1 (table D.11, Appendix D to SP 5.13130-2009); Tm - the minimum operating temperature in the protected room is assumed to be 278K. r1 \u003d 5.208 x 1 x (293/293) \u003d 5.208 kg / m 3; K2 is a coefficient that takes into account the losses of the GOS through leaks in the room and is determined by the formula: K2 \u003d P x d x tpod. √N, where (4) P = 0.4 is a parameter that takes into account the location of openings along the height of the protected premises, m 0.5 s -1 . d – the parameter of room leakage is determined by the formula: d=Fн/Vр., where (5) Fн is the total area of ​​the room leakage, m 2 . tsub. - the time for filing the GOS is taken equal to 10 seconds for freon (SP 5.13130-2009). H – room height, m ​​(in our case H=3.8m). K2 = 0.4 ´ 0.016 ´ 10 ´ Ö 3.8= 0.124 Substituting the values ​​determined above, in formula 2 we obtain Мр GOS required to extinguish a fire in the room: Мр = 1.05 x (91.2) x 5.208 x (1 + 0.124 ) x 9.8 / (100-9.8) = 60.9 kg. 4.1.3. The piping used in this project ensures the release of gas into the room within the standard time and does not require hydraulic calculation in this project, because release time is confirmed by the manufacturer's hydraulic calculation and tests. 4.1.4. Calculation of the area of ​​openings. The calculation of the area of ​​​​poems for relieving excess pressure is carried out in accordance with Appendix 3 of SP 5.13130.2009

5. The principle of operation of the installation

In accordance with SP 5.13130-2009*, the automatic modular gas fire extinguishing installation is provided with three types of start-up: automatic, remote. Automatic start is carried out with the simultaneous operation of at least 2 automatic fire smoke detectors controlling the protected premises. At the same time, the control panel generates a “FIRE” signal and transmits it via a two-wire communication line to the alarm console. In the protected room, the light and sound alarm "Gas - Go away!" and at the entrance to the protected premises, the light alarm “Gas - Do not enter!” Turns on. Not less than 10 seconds - necessary for the evacuation of service personnel from the protected premises and making a decision to turn off auto start(by the operator in the room on duty), an electrical impulse is applied through the "fire extinguishing start" circuits to the shut-off and starting devices installed on the gas fire extinguishing modules. In this case, the pressure of the working gas is released into the shut-off and starting cavity of the LSD. The pressure release of the working gas causes the valve to move, open the previously blocked section and displace freon under excess pressure into the main and distribution pipelines to the nozzles. Coming under pressure to the nozzles, freon is sprayed through them into the protected volume. The fire alarm station of the object receives a signal from the CDU installed on the main pipeline about the exit of the fire extinguishing agent. In order to ensure the safety of persons working in the protected premises, the scheme provides for disabling the automatic start when the door to the protected premises is opened. Thus, the automatic mode of switching on the installation is possible only during the absence of people working in the protected room. Disabling the mode of automatic operation of the unit is carried out using the remote starter (RDP). RAP is installed next to the protected premises. RAP allows remote (manual) start of fire extinguishing agent. When a fire is visually detected, after making sure that there are no people in the protected room, it is necessary to tightly close the door of the room where the fire broke out, and use the remote start button to start the fire extinguishing system. Do not open the protected room to which access is allowed, or violate its tightness in any other way within 20 minutes after the operation of the automatic modular installation gas fire extinguishing (or until the arrival of fire departments).

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

• dimensions and design features premises;
• number of rooms;
• distribution of premises by fire hazard categories (according to NPB No. 105-85);
• the 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 - so the extinguishing system will be as effective as possible in fighting the fire and safe for the people in the building.

Thus, the choice of the designer of the gas fire extinguishing installation should be taken responsibly, it is better if the same performer 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

A gas fire extinguishing installation is a complex system that is used to extinguish fires of classes A, B, C, E in enclosed spaces. Selection the best option GOTV (gas fire extinguishing agent) for UGP allows not only to be limited to those premises where there are no people, but also to actively use gas fire extinguishing to protect facilities where service 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 GOTV;
• distributors;
• pipelines;
• nozzles (valves) with locking and starting device;
• manometers;
• fire detectors that generate a fire signal;
• control devices for control of UGP;
• hoses, adapters and other accessories.

The number of nozzles, the diameter and length of pipelines, as well as other UGP parameters, 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 initial data, performance of calculations.
3. Drawing up a working version of the project, approval of documentation with the customer.
4. Preparation of the final version of the project documentation, which includes:
   • text part;
   • graphic materials - the layout of the protected premises, the available technological equipment, the location of the UGP, the connection diagram, the cable laying route;
   • specification of materials, equipment;
   • detailed estimate for installation;
   • work sheets.

The speed of installation of all equipment, as well as the reliable and efficient operation of the system, depend on how competently and completely the UGP project is drawn up.

Gas extinguishing module

For storage, protection from external influences and the release of fumes to eliminate fire, special gas fire extinguishing modules are used. Outwardly, these are metal cylinders equipped with a shut-off and starting device (ZPU) and a siphon tube. Those models in which liquefied gas is stored, in addition, have a device for controlling the mass of DHW (it can be both external and built-in).

Cylinders usually have an information plate, which is filled in by responsible person or master of maintenance UGP. The following data should be entered regularly on the plate - module capacity, operating pressure. Also, the modules should 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 tests, charges;
• name of GOTV, its mass.

Activation of the module in case of fire occurs after a signal is received from the manual start devices or the receiving and control fire and security device to the starting device (PU). After the launcher is triggered, powder gases are formed that create excess pressure. Thanks to this, the ZPU opens and the fire extinguishing gas leaves the cylinder.

The cost of installing a gas fire extinguisher

The UGP designer necessarily conducts a preliminary calculation of the installation installation cost.

The price will depend on several factors:

• the cost of technological equipment - modules, including components and the required number of GFFS, reception and control devices, detectors, scoreboards, cabling;
• height and area of ​​the protected premises (or premises);
• purpose of the object;
• GOTV type.

Agreement for the installation of a fire extinguishing system

High-quality design of a gas fire extinguishing installation, installation calculation, further Maintenance systems – we do all this for our customers.

Details such as:

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

after discussion and approval with the client will be spelled out in the contract.

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