Our design department has developed working documentation gas fire extinguishing AGPT.

Automatic gas fire extinguishing installation

This Project of “Automatic installation of gas fire extinguishing” was developed for the Bank’s data center premises. based on the contract, initial data provided by the Customer, in accordance with technical specifications for design and the following regulatory and technical documentation:

SP1.13130.2009 SP3.13130.2009 SP4.13130.2009 SP5.13130.2009

"Evacuation routes and exits"

“Warning and evacuation management system in case of fire”

“Limitation on the spread of fire at protection facilities”

"Installation fire alarm and automatic fire extinguishing systems"

SP6.13130.2009 “Electrical equipment”

SP 12.13130.2009 “Definition of categories of premises, buildings and external

"Technical regulations on requirements fire safety»

Order of the Ministry of Emergency Situations No. 315-2003

PUE 2000 (ed. 7) GOST 2.106-96

“List of buildings, structures, premises and equipment subject to protection by automatic fire extinguishing installations and automatic fire alarms”

Rules for electrical installations.

Unified system of design documentation. Text documents.

Brief description of the object.

The object is a 3-storey building with a basement. The basement ceiling is reinforced concrete, thickness 25 cm. The fire resistance level of the building is II, the level of responsibility is normal. The main fire load in the room is the flammable mass of cables.

Explosion-protected premises fire danger have category B4, fire and explosion hazard class - P II -a. There is no dust, presence of aggressive agents, sources of heat and smoke. The height of the 1st floor (Data Center premises) is variable: from the concrete floor to the ceiling - 2800 mm; from concrete floor to beam - 2530 mm. Height Basement- 3 meters.

Main technical solutions adopted in the project.

Characteristics of protected premises.

Room	Server room
Height, m
Area, m2
Suspended ceiling	absent
Total volume of the room, m3
Raised floor
The full volume of underground space, m
Fire class
Room
Height, m
Area, m2
Suspended ceiling	absent	absent
Total volume of the room, m3
Raised floor
Total volume of underground space, m3
Fire class
Availability is constant open openings

Entrance doors to protected premises are equipped with automatic closers.

Brief characteristics of the fire extinguishing agent.

Automatic volumetric fire extinguishing systems directly affect the fire in initial stage its development. The gas fire extinguishing agent “ZMTM NovecTM 1230” is used as a fire extinguishing agent for protected premises. Installations with Novec gas extinguishing agent implement a volumetric fire extinguishing method based on the cooling effect.

The installation includes the following equipment:

For the server room - 1 gas fire extinguishing module MPA-TMS 1230 with fire extinguishing agent "ZMTM NovecTM 1230" 180 l, operating pressure 25 bar at 20°C, designed for storage and release of fire extinguishing agent. The module is supplied filled with fire extinguishing agent. For UPS 1 (UPS 2) -1 gas fire extinguishing module MPA-TMS 1230 with fire extinguishing agent "ZMTM NovecTM 1230" 32 l, operating pressure 25 bar at 20°C, designed for storage and release of fire extinguishing agent. The modules are supplied filled with fire extinguishing agent.

The pressure switch, designed to issue a signal about the operation of the installation, is installed directly on the locking and starting device of the module. Modules using sleeves high pressure connected to pipelines. Nozzles are installed on the pipelines, designed for uniform dispersion of the 3MTM NovecTM 1230 fire fighting substance in the protected area.

System operation

When a fire occurs in the protected premises, one or more detectors (sensors) are triggered and information from the triggered sensor is sent to the receiving and control device by automatic means fire extinguishing and sirens "S2000-ASPT", through the outputs of which the automatic fire extinguishing installation (AUPT) is controlled. When a smoke detector (normally open) is triggered once, the detector re-query function: resets the voltage in the alarm loop and waits for a re-activation for one minute. If the detector does not return to its initial state after reset or is triggered again within one minute, the device goes into the “Attention” mode. Otherwise, the device remains in standby mode.

The device recognizes double triggering, that is, the device recognizes that two or more detectors in the loop have triggered. In this case, the transition from the “Attention” and “Attention” modes to the “Fire” mode is carried out only when the second detector in the alarm zone is triggered. Switching the device to the "Fire" mode is a condition for automatic start AUPT. Thus, the tactics of automatically launching the automatic fire control system when two detectors in one alarm zone are triggered have been implemented. The fire alarm system is made using smoke fire detectors DIP-44 (IP 212-44), combined into loops and connected to automatic control and control devices"S2000-ASPT" controls, which are installed in the server room and in the UPS1 and UPS2 rooms. The launch of the automatic fire alarm system is carried out automatically when at least 2 smoke fire detectors IP 212-44 included in the fire alarm loop of the S2000-ASPT device are triggered.

"AUTOMATION DISABLED" display; and "GAS-DO NOT ENTER" are installed outside above the doors of the room. Remote start buttons with a Plexo 091621 key (Legrand) with a key to protect against unauthorized activation and Touch Memory “Reader-2” key readers are installed outside at a height of 1.5 m from the floor. To identify the switch there is a sign “ Remote start AUPT", which is installed outside the protected premises. After receiving a command from the fire alarm installation, a flat light display with a built-in sound siren "GAS - GO" "Molniya24-3" installed inside the room is turned on, and outside the room the "GAS - DO NOT ENTER" sign is turned on and signals are issued to close the fire-retarding valves of the ventilation systems and “Fire” signal to the access control and management system, to the building fire alarm system and to the dispatch system.

After the 10 seconds required to evacuate people from the room protected by the S2000-ASPT, a command is issued to start the automatic fire control system, and it is necessary that the door to the protected room be closed. The GOTV starts after a delay of 3 seconds. A delay in the start-up time of the automatic fire control system is given to allow the evacuation of people from premises, the shutdown of supply and exhaust ventilation, and the closure of fire-retarding valves. In accordance with the Customer's specifications, control of 8 air conditioning systems is provided. from the 4th channel “S2000-ASPT”. “S2000-ASPT” is programmed to turn off the air conditioning system while releasing gas. When a fire command is received from the system automation, the data center air conditioning system stops. After the time required for the evacuation of personnel and the release of fire and liquid fuels (estimated time 23 seconds), the air conditioning system starts up.

Devices

If the "Automation restoration" parameter is enabled, the "S2000-ASPT" device automatically restores the "Automation on" mode when restoring the door DS (when the door is closed), or when restoring after a malfunction. In the server room there are 8 overhead strobe lamps, 220V, 1W, bulb PC, IP 44, G-JS-02 R, red, which light up when the system is switched to automatic mode. If the parameter is turned off, violation of the door DS leads to the switching of the S2000-ASPT device to the “Automatic off” startup mode. and when the door DS is restored, the start mode does not change. To control the closure of the door to the protected room, it is used. magnetic contact detector"IO 102-6". When gas is released from the gas fire extinguishing module, the control system is triggered and a signal is issued to the alarm panel about gas entering the distribution pipeline.

To ensure the safety of service personnel, upon entering the protected premises (opening the door), the magnetic contact detector “IO 102-6” is triggered and blocks the automatic start of the installation. To enable and disable the automatic launch of the automatic fire alarm system, external contact devices EI “Reader-2” are installed at the entrance to each protected room. For repair work and scheduled checks, Touch Memory keys are used to disable automatic gas fire extinguishing installations, while the automatic fire alarm installation remains operational, and the installation will not issue a start signal for the AUGPT.

When the automatic start system is turned off, the Molniya24 display with the inscription “AUTOMATION DISABLED”, installed outside the protected premises, turns on. Automatic start-up is restored using the S2000-PT fire extinguishing system display unit installed in the 24-hour watch room under the following conditions:

the key for control is defined;

access is allowed (external indicator status is on) via Touch Memory.

fire extinguishing systems

The “S2000-PT” fire extinguishing system indication unit installed in the 24-hour duty room is designed to display the status of sections received via the RS-485 interface from the “S2000M” remote control and fire extinguishing control through the “S2000M” remote control to the built-in light indicators and sound signaling device. "S2000-PT" allows you to produce in each of 10 directions:

“Enabling automation” (pressing the “Automatic” button when automation is disabled);

“Turning off automation” (pressing the “Automatic” button when automation is on);

“Start PT” (press the “Extinguishing” button for 3 s);

- “Cancel PT start” (short press on the “Extinguishing” button).

Basic technological solutions.

The project adopted modular gas fire extinguishing installations. A modular installation designed for gas fire extinguishing in a server room is located in the vestibule. Modular installations designed for gas fire extinguishing of UPS1 and UPS2 premises are located directly in the protected premises. The module is connected to the pipeline using a high-pressure hose. A nozzle is installed on the pipeline, designed for uniform dispersion of the 3MTM NovecTM 1230 fire fighting substance in the protected area.

The equipment of gas fire extinguishing systems is located with the possibility of free access to it for its maintenance. The main characteristics of automatic gas fire extinguishing installations are presented in the tables.

Main characteristics of A UGP

Protected premises		Server room
		MPA-IUS1230(25-180-50) 180l 1 pc.
Weight of GFFE, kg
Sprayer (nozzles), pcs.		NVC nozzles DN 32 aluminum 1 1/4” - 2 pcs.
GOTV release time, sec.
		MPA-IUS1230(25-180-50)
Protected premises
Gas fire extinguishing module, pcs.	MPA-NVC 1230 (2532-25)		MPA-NVC 1230 (25-32-25)
Weight of GFFE, kg
Sprayer (nozzles), pcs.	NVC nozzles DN 32 aluminum		NVC nozzles DN 32 aluminum
GOTV release time, sec.
Module for storing GOTV stock, pcs.	MPA-ShS1230 (25-32-25)
Weight of GFFS in spare modules, kg

When a starting pulse is applied to the locking and starting device of the module with electric start (voltage is supplied to solenoid valve) the ZPU of this module opens and the GFFS flows through the piping to the sprayers (nozzles).

The calculation of the mass of the fire extinguishing agent, as well as other installation parameters, was carried out in accordance with SP 5.13130.2009 and VNPB 05-09 “Organization standard for the design of gas fire extinguishing installations with MPA-NVC 1230 modules based on the Novec 1230 fire extinguishing agent.” General technical requirements" (FGU VNIIPO EMERCOM of Russia. 2009), as well as the current version of the calculation program hydraulic flows Hygood Novec 1230 FlowCalc HYG 3.60, developed by Hughes Associates Inc and confirmed by full-scale tests of the Federal State Institution VNIIPO EMERCOM of Russia with conclusion No. 001/2.3-2010. Removal of combustion products after a fire in accordance with the design assignment is carried out using the system general ventilation.

Installation pipelines.

The installation pipelines are made of seamless hot-deformed steel pipes in accordance with GOST 8734-75. The nominal diameter of the pipes is determined hydraulic calculation. It is allowed to use pipes with wall thicknesses different from the design, provided that those specified in the design are maintained conditional passage, and a thickness no less than the design one. Connection of system pipelines - welded, threaded, flanged. Pipelines should be fastened in the places indicated in the drawing, on hangers accepted in this project. The gap between the pipelines and building structures must be at least 20 mm. The installation pipelines must be grounded. Sign and place of grounding - in accordance with GOST 21130. After installation, test the pipelines for strength and tightness, in accordance with clause 8.9.5 SP5.13130.2009. Pipelines and their connections must ensure strength at a pressure equal to 1.25 Prab, and tightness for 5 minutes at a pressure equal to Prab (where Prab, - maximum pressure GFFE in a vessel under operating conditions). Thus:

Rrab = 4.2 MPa

Risp = 5.25 MPa

Before testing, pipelines must be disconnected from the control and starting units and plugged. Test plugs must be screwed into the nozzle installation locations. Pipelines are subjected to protective and identification painting in two layers in colors in accordance with GOST 14202-69 “Pipelines industrial enterprises. Identification painting, warning signs and marking shields" and GOST R 12.4.026-2001, clause 5.1.3 with PF-115 enamel yellow color. Before applying the enamel, one layer of GF-021 primer is applied. Installation of a gas fire extinguishing system is carried out in accordance with VSN 25.09.66-85 and the product data sheet.

Cable communication lines

Redundant power supply RIP-24 isp. 01 and the receiving and control device for controlling automatic fire extinguishing equipment and sirens “S2000-ASPT” to the 220V network and connected with a VVGng-FRLS 3x1.5 cable. Signal panels "Molniya24", SDU, fire alarm sensors "IP 212-44", magnetic contact sensors "IO102-6" and switching device UK-VK/04 are connected with KMVVng-FRLS cables 1x2x0.75 and 1x2x0.5. The RS-485 interface line is carried out using the KMVVng-FRLS 2x2x0.75 cable. Cables are laid in rooms in an electrical box 60x20 and 20x12.5, and in the corridor - in an electrical box 20x12.5 and in corrugated pipe d = 20.

Power supply

According to the PUE, fire alarms in terms of power supply are classified as electrical receivers of the 1st category. Therefore, the installation must be powered from two independent sources alternating current voltage 220 V, frequency 50 Hz and at least 2.0 kW each, or from one AC source with automatic switching in emergency mode on backup power from batteries. Backup power must provide normal work installations for 24 hours in standby mode and at least 3 hours in “Fire” mode. The fire extinguishing system display unit “S2000-PT”, the interface converter RS-232/RS-485, “S2000-PI” and the fire-security monitoring and control device “S2000M” are powered from a redundant power supply RIP-24 iz. 01.

The reception and control devices and control of automatic fire extinguishing equipment and sirens “S2000-ASPT” installed in the server room and in the UPS1 and UPS2 rooms consume no more than 30 W from a 220V network. Power consumption is 250 W. Technical specifications electrical receivers of the fire station premises: voltage at the working input - 220V, 50 Hz. power consumption at the working input is no more than 2000 VA. voltage deviations from -10% to +10%.

Occupational health and safety measures

Compliance with safety regulations is a necessary condition safe work during operation of installations. Violation of safety regulations can lead to accidents. Only persons who have undergone safety training are allowed to operate the installation. Completion of the training is noted in the log. All electrical installations, installations and repairs must be carried out only when relieved tension and compliance with the "Rules" technical operation electrical installations of consumers" and "Safety rules for the operation of electrical installations of consumers of Gosenergonadzor". All work should be carried out only with a serviceable tool; it is prohibited to use wrenches with extended handles, tool handles must be made of insulating material. Installation and adjustment work must be carried out in accordance with RD 78.145-93.

Maintenance.

The main purpose of maintenance is to carry out measures aimed at maintaining installations in a state of readiness for use: preventing malfunctions and premature failure of component devices and elements.

Maintenance and repair structure:

Maintenance;

Scheduled maintenance;

Planned major repairs;

Unscheduled repairs.

When carrying out maintenance work, you should be guided by the requirements of the “Operating Instructions and maintenance» devices used in the AUPT system.

Professional and qualified staff.

Maintenance and routine repair work is carried out by communication installers of at least the 5th category. The number of communications fitters for maintenance and current repairs OS takes into account necessary costs time for all components of the installation. Thus, the required number of personnel is involved in servicing the installations: communication technician of the 5th category - 1 person, 4th category - 1 person.

Equipment installation requirements.

When installing and operating installations, be guided by the requirements laid down in the technical documentation of the manufacturers of this equipment, GOST 12.1.019, GOST 12.3.046, GOST 12.2.005.

Environmental protection.

acceptable health standards. The designed equipment does not highlight harmful substances into the environment.

Occupational health and safety.

Required lead to past training. Compliance with safety regulations is a condition for safe operation when operating installations. Violation of safety rules can lead to accidents. Persons with safety instructions are allowed to operate the installation. The passage is noted in the journal.

All electrical installation, installation and repairs must be carried out only when the voltage is removed and in compliance with the “Rules for the technical operation of consumer electrical installations” and the “Safety rules for the operation of consumer electrical installations of the State Energy Supervision Authority”. All work should be carried out only with working tools; the use of wrenches with extended handles is prohibited; tool handles must be made of insulating material. Installation and adjustment work must be carried out in accordance with RD 78.145-93.

Before installing and assembling any fire extinguishing equipment, its placement diagram is pre-designed by a specialist. This also applies to gas fire extinguishing. Competently and correctly carried out work on drafting a gas fire extinguishing system will allow you to avoid many problems with the subsequent reinstallation of the complex, emergency situations and other troubles.

How gas fire extinguishing is designed - general provisions and principles

Drawing up a project begins with studying the initial data on the object of protection. The specialist takes into account such parameters as:

• dimensions of the premises;
• location of floors, their design;
• placement of utilities;
• the presence and size (area) of openings in enclosing structures that are constantly open;
• values ​​of maximum permissible pressure in premises;
• microclimatic parameters of the premises where the components of the AUGP will be located;
• fire hazard of premises, fire class according to Gosstandart for substances and materials stored there;
• features (if any) of the HVAC (heating, ventilation, air conditioning) system;
• availability and characteristics technological equipment indoors;
• the number of people constantly present in the premises;
• features of evacuation routes and exits.

The amount of data that needs to be known and taken into account when designing is significant. Based on the collected information, the designer calculates the gas fire extinguishing system.

As a result, the AUGP parameters suitable for a specific object will be selected:

• the required amount of gas extinguishing agent;
• optimal duration of GFFS supply;
• required diameter of pipelines, type and number of nozzles for installation;
• maximum excess pressure when supplying fire extinguishing agent;
• number of backup modules (cylinders) with GFFS;
• type and number of fire detectors (sensors).

The design of gas PT installations is carried out on the basis of fire safety standards (NPB No. 22-96).

Stages of designing gas fire extinguishing at facilities

Any gas fire extinguishing project begins with receiving an assignment from the customer to perform the work, and then collecting and analyzing data on the facility.

The further plan of action is approximately as follows:

1. Determination of the type of AUGP (modular, mobile, stationary).
2. Engineering calculations.
3. Development and execution of drawings for a gas fire extinguishing installation project.
4. Drawing up specifications for materials and equipment.
5. Development of specific tasks for further installation of AUGP.

According to current standards, when designing an AUGP, some nuances must be taken into account:

• organization of openings to relieve excess pressure;
• integration of gas fire extinguishing with other building systems;
• planning effective gas removal from premises after using AUGP, etc.

Calculations require special knowledge from the designer, permission and license to carry out this type of work.

We are ready to provide all this, as well as installation and further maintenance of gas fire extinguishing systems to our clients.

Gas fire extinguishing is the most effective and, in many cases, no alternative way to automatically extinguish a fire (fire). Gas extinguishing agents have been used in fire extinguishing systems for many years - in Europe they began to be widely used back in the 1950s. Gas has many advantages - it is most often an environmentally friendly substance that effectively extinguishes fire and does not harm property or interiors.

Modern systems gas fire extinguishing systems are truly unique. If a few years ago we knew only about a few varieties, then today new generations of gas fire extinguishing agents, used in systems automatic fire extinguishing, allow us to speak of ourselves as absolutely safe, environmentally friendly products that quickly evaporate from the atmosphere.

The scope of application of gas fire extinguishing systems is wide - they are used wherever the use of water, powder or foam is undesirable or impossible - at facilities where there is a lot of electronic computing equipment (server rooms, computing centers, equipment rooms), where even a short-term power outage can lead to extremely serious consequences (for example, in airplanes and on ships), as well as in rooms where securities or works of art - archives, libraries, museums, art galleries.

Cost of gas fire extinguishing design

List of design works

Choosing a specialist

Usage the latest systems gas fire extinguishing requires a number of preparatory and design work, on which the flawless operation of the entire automatic fire extinguishing system as a whole largely depends.

The design of gas fire extinguishing must be carried out by specialists, since all calculations are made in accordance with the rules established by law. The design of gas fire extinguishing systems is based on the analysis of several parameters: the number of rooms, their size, as well as the presence of suspended ceilings and partitions, area doorways, temperature conditions at the facility, air humidity in the room, presence and working hours of personnel.

Based on these data, the required number of modules/reservoirs with gas, the diameter of the pipelines through which gas will be supplied to the source of fire, as well as the number and size of holes in the nozzles spraying gas are calculated.

Equipment selection

Hi-tech and advanced developments of the 3M company made it possible to create an absolutely safe, environmentally friendly product of a new generation - the gas substance Novec 1230. It contains components that do not cause corrosion and have excellent dielectric properties.

The gaseous substance is not absorbed into surfaces sensitive to humidity, evaporates quickly, as a result of which no damage is caused to valuable property, for example, when extinguishing a fire, archival materials, electrical equipment, computers, and art objects are not damaged gaseous substance Novec 1230, used for fire extinguishing.

Mandatory requirement current standards are carrying out calculations of the need to organize openings to relieve excess pressure, integrating AUGPT into the building, organizing gas and smoke removal from the protected premises after extinguishing the fire. All these complex calculations are produced according to approved methods and require special engineering knowledge.

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.

Standards and regulations 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 vehicle standards. 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 the field of 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 and fire alarm system. General technical requirements. GOST 14202-69 Pipelines of 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 environmental climatic factors. 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 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 automatics 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 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 the 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 circuits power supply, management and control 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); - design of floors and location of utilities; - 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 of fire hazard of 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; - type definition and required quantity fire detectors or alarm sprinklers. 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 regulations for the time necessary for the evacuation of people after the application of light and sound notification, 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 of stopping ventilation equipment, closing 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 tank for storing GOS can be installed 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. Minimum height premises 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 premises should be from 5 to 35 ° C, relative humidity air no more than 80% at 25 °C, illumination - no less than 100 lux at fluorescent lamps or at least 75 lux with incandescent lamps. Emergency lighting must comply with the requirements of SNiP 23.05.07-85. Station premises must be equipped supply and exhaust ventilation with at least two air exchanges within 1 hour. Stations must be equipped telephone communication with premises for duty personnel, leading 24/7 duty. 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 state standard specified in technical documentation on 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 clogging of nozzles during the release of GOS. 5.1.23. Only one type of nozzle should be used in one room. 5.1.24. When placing nozzles in places where they can be 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 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 ensure: - 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 area, the modules (batteries) must have a local start.3. In the presence of closed system, serving only this room, it is allowed not to turn off ventilation, air conditioning, and air heating after supplying 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, it is necessary to provide a light indication of the operating mode of the AUGP. 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 to supply 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 in which, 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 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 that takes 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 volume concentration of СН and the ratio molecular weights air and gas fire extinguishing agent; 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 overpressure when feeding 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
Organoplastik 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 impractical. 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 the 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 is the initial mass of 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 environmental requirements... 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