CEN/TC 191/WG 6 - Gas extinguishing Systems and components

This document specifies requirements and gives recommendations for the design, installation, testing, maintenance and safety of gas extinguishing systems in buildings, plants or other structures, and the characteristics of the various extinguishants and types of fire for which they are a suitable extinguishing medium.
This document describes total flooding systems primarily related to buildings, plants and other specific applications, utilizing electrically non-conducting gaseous fire extinguishants that do not leave a residue after discharge and for which there are sufficient data currently available to enable validation of performance and safety characteristics by an appropriate independent authority. This document is not applicable to explosion suppression.
This document is not intended to indicate approval of the extinguishants listed therein by the appropriate authorities, as other extinguishants may be equally acceptable. CO2 is not included as it is covered by its own European standard.
This document is applicable to the extinguishants listed in Table 1. This document is intended to be used in conjunction with the given parts of EN 15004 for fire extinguishing agents in Table 1.
Table 1 - Listed extinguishant
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This document specifies requirements and gives recommendations for the design, installation, testing, maintenance and safety of fixed carbon dioxide firefighting systems in buildings, plants or other structures. It is not applicable to extinguishing systems on ships, in aircraft, on vehicles or on mobile fire appliances, or to below ground systems in the mining industry; nor does it apply to carbon dioxide pre-inerting systems.
Design of systems where unclosable opening(s) of the protected volume exceed a specified area and where the opening(s) can be subject to the effect of wind is not specified, although general guidance on the procedure to be followed in such cases is given (see 7.4.3.2).

This document establishes the minimum requirements applicable to the design, installation, functioning, test and maintenance of fixed automatic fire extinguishing systems for kitchen protection that covers the cooking appliances, the hood, the plenum and the air extract ducts. This document also provides requirements for the construction and components performance as applicable to specific types, designs, sizes and arrangements of pre-engineered kitchen fire-extinguishing systems.
This document does not cover household kitchens or industrial food production equipment.
The detailed test procedures for the plenum and air extract ducts are contained in CEN/TS 17749.
Closed plenum type ventilated ceilings designed similar to standard hoods are included in this document. Open plenum type ventilated ceilings are excluded and require an engineered solution for the plenum protection. Protection for appliances below open or closed plenum ventilated ceilings are included.

This document provides specific requirements for gaseous fire-extinguishing systems with respect to the Halocarbon Blend 55 extinguishant. It includes details of physical properties, specification, usage and safety aspects. It also covers systems operating at nominal pressures of 25 bar, 35 bar, and 42 bar and 50 bar, superpressurized with nitrogen. This document does not preclude the use of other systems.
NOTE   1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

This document gives guidelines for fulfilling the requirements contained in ISO 6183:2022, 6.4.1 and 7.4.1 and ISO 14520‑1:2023, 5.2.1 h) and 5.3 h), in respect to over- and under-pressurization venting and post-discharge extract.
It considers the design, selection and installation of vents to safeguard the structural integrity of enclosures protected by fixed gaseous extinguishing systems and the post-discharge venting provisions where used.

This document establishes the detailed test procedures for conducting the test on the plenum and air extract ducts.

This document contains specific requirements for gaseous fire-extinguishing systems, with respect to FK-5-1-12 extinguishant. It includes details of physical properties, specifications, usage and safety aspects.
This document is applicable only to systems operating at nominal pressures of 25 bar, 34,5 bar, 42 bar and 50 bar with nitrogen propellant. This does not preclude the use of other systems.

This document contains specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 227ea extinguishant. It includes details of physical properties, specification, usage and safety aspects.
This document covers systems operating at nominal pressures of 25 bar, 42 bar and 50 bar with nitrogen propellant. This does not preclude the use of other systems.

This document contains specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 125 extinguishant. It includes details of physical properties, specifications, usage and safety aspects.
This document is applicable to systems operating at nominal pressures of 25 bar and 42 bar, superpressurized with nitrogen. This does not preclude the use of other systems.

This document contains specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 23 extinguishant. It includes details of physical properties, specifications, usage and safety aspects. It is applicable to systems operating at a nominal pressure of 41 bar without nitrogen superpressurization and 70 bar superpressurized with nitrogen.

This European standard specifies oxygen reduction systems that are used as fire prevention systems by creating an atmosphere in an area which is having a lower permanent oxygen concentration as in ambient conditions. The level of oxygen reduction is defined by the individual risks of these areas (see Annex A). Oxygen reduction is achieved by technical systems which are providing a flux of air containing a reduced concentration of oxygen.
This European standard specifies minimum requirements and defines the specifications governing the design, installation and maintenance of fixed oxygen reduction systems with oxygen reduced air in buildings and industrial production plants. The standard also applies to the extension and modification of existing systems.
This European standard applies to oxygen reduction systems using nitrogen which are designed for continual oxygen reduction in enclosed spaces.
NOTE   Nitrogen is today the most suitable gas to be used for oxygen reduction. For other gases this European standard can be used as basis.
This European standard does not apply to oxygen reduction systems that use water mist or combustion gases.
The European standard does not apply to:
-   explosion suppression systems;
-   explosion prevention systems;
-   fire extinguishing systems using gaseous extinguishing agents;
-   inertization of portable containers;
-   systems in which oxygen levels are reduced for reasons other than fire prevention (e.g. steel processing in the presence of inert gas to avoid the formation of oxide film);
-   inerting required during repair work on systems or equipment (e.g. welding) in order to eliminate the risk of fire or explosion.
In addition to the conditions for the actual oxygen reduction system and its individual components this European standard also covers certain structural specifications for the protected area.
The space protected by an oxygen reduction system is a controlled and continuously monitored indoor climate for extended occupation. This standard does not cover unventilated confined spaces that may contain hazardous gases.

This document specifies requirements and test methods for condensed aerosol extinguishing system components.
This document covers the use of condensed aerosol extinguishing systems for total flooding applications.
This document in not applicable to explosion suppression applications.
This document does not cover all legislative requirements. In certain countries specific national regulations apply and take precedence over this document. Users of this document are advised to inform themselves of the applicability or non-applicability for this document by their national responsible authorities.

This document specifies requirements and methods for the design, installation and maintenance of condensed aerosol extinguishing systems and the characteristics of the extinguishing media and types of fire for which it is a suitable extinguishing medium.
This document covers the use of condensed aerosol extinguishing systems for total flooding applications.
This document is not applicable to explosion suppression applications.
This document does not cover all legislative requirements. In certain countries specific national regulations apply and take precedence over this document. Users of this document are advised to inform themselves of the applicability or non-applicability for this document by their national responsible authorities.

1.1   This part of EN 15004 contains specific requirements for gaseous fire-extinguishing systems, with respect to the IG-55 extinguishant. It includes details of physical properties, specification, usage and safety aspects.
1.2   This part of EN 15004 covers systems operating at nominal pressures of 150 bar at 15 °C, 200 bar at 15 °C and 300 bar at 15 °C. This does not preclude the use of other systems, although design data for other pressures are not available at this time.

1.1   This part of EN 15004 contains specific requirements for gaseous fire-extinguishing systems, with respect to the IG-01 extinguishant. It includes details of physical properties, specification, usage and safety aspects.
1.2   This part of EN 15004 covers systems operating at nominal pressures of 160 bar, 200 bar and 300 bar at 15 °C. This does not preclude the use of other systems, although design data for other pressures are not available at this time.

1.1   This part of EN 15004 contains specific requirements for gaseous fire-extinguishing systems, with respect to the IG-541 extinguishant. It includes details of physical properties, specification, usage and safety aspects.
1.2   This part of EN 15004 covers systems operating at nominal pressures of 150 bar, 200 bar and 300 bar at 15 °C. This does not preclude the use of other systems, although design data for other pressures are not available at this time.

1.1   This part of EN 15004 contains specific requirements for gaseous fire-extinguishing systems, with respect to the IG-100 extinguishant. It includes details of physical properties, specification, usage and safety aspects.
1.2   This part of EN 15004 covers systems operating at nominal pressures of 200 bar at 15 °C and 300 bar at 15 °C. This does not preclude the use of other systems, although design data for other pressures are not available at this time.

This European Standard specifies requirements and describes test methods for flexible and rigid connectors used in CO2 -, Inert Gas- or Halocarbon gas fire extinguishing systems.
This European Standard is applicable to connectors used:
-   between container valves and the manifold (type 1 and type 5 connector);
-   in pneumatic pilot lines (type 3 connector);
in distribution pipework of fire extinguishing installations downstream of the manifold/selector valve (type 2 or type 4 connector).

This European Standard specifies requirements and describes test methods for pressure gauges and pressure switches. Pressure gauges are used e.g. for monitoring of pilot, control, alarm and storage containers of fire extinguishing systems filled with non-liquefied inert gases or pressurized halocarbon gases. Pressure switches are used e.g. for monitoring of pilot, control, alarm and storage containers of fire extinguishing systems filled with non-liquefied inert gases or pressurized halocarbon gases and remote indication of leakage.

This European Standard specifies requirements and test methods for non-electrical disable devices for CO2, Inert gas- or Halocarbon gas fire extinguishing systems.
Examples are:
a) an isolating valve in the pipework to the flooding zone or in a pneumatic pilot line;
b) a device blocking the actuator at the bank of containers or the container valve in single-zone installations or the actuator of selector valves in multiple-zone installations.

This European Standard specifies requirements and describes test methods for selector valves and their actuators used in CO2 -, Inert Gas- or Halocarbon gas fire extinguishing systems.

This European Standard specifies requirements and test methods for nozzles which introduce the extinguishing agent into a CO 2 protected zone. The design of the nozzles will influence discharge rate and thus the pressure drop in the piping network. The
extinguishing agent normally arrives at the nozzle in two-phase flow form (liquid-gaseous mixture). It expands into the protected volume to form a gas or a gas-and-dry-ice mixture depending on the nozzle type. This standard should only be used as guidance for testing nozzles which work on different principles.

This document specifies requirements and describes test methods for container valve assemblies for CO2-high-pressure-, Inert Gas- or Halocarbon Gas-fire extinguishing systems, which include a container valve, an actuator and possibly a diptube.
This document specifies requirements and describes test methods for features of the component relevant only for its use in fire extinguishing installations.
Diptubes not assembled to the container valves are not covered by this standard.
NOTE   Valve assemblies can be equipped with additional components (e.g. gauges and switches).

This European Standard specifies requirements and test methods for non-electric automatic control devices incorporating non-electric delay devices for CO2, inert gas- or halo-carbon-gas fire extinguishing systems. This standard is applicable for devices which may be triggered by: - an automatic fire detection installation; - an electrical control device; - a non-electrical special fire detector; - a manual triggering device or; - a combination of the above.

This European standard specifies requirements and test methods for electrical control and delay devices for use in combination with automatic fire detection systems and CO2 extinguishing systems installed in buildings. EN  12094-1 is prepared in liaison with CEN/TC 72.

This standard specifies the performance criteria for heat exposure and flame resistance, impact resistance, corrosion resistance, vibration/pressure resistance, response delay, operational reliability and sensitivity (audibility)for alarm devices in CO2 extinguishing systems used for fire suppression. This standard includes the corresponding test methods and the evaluation of conformity of the product to this standard.

This European standard specifies requirements and describes test methods for manual triggering and stop devices of CO2-, Inert Gas- or Halocarbon gas fire extinguishing systems.   Manual triggering devices allow a person to trigger the control device of the fire extinguishing system.   They are either non-electrical orelectrical devices.  Manual stop devices allow a person to initiate the emergency stop function of the electrical control device of the fire extinguishing system. Manual stop  devices are electrical components to operate the emergency stopfunction of the electrical control device of the fire extinguishing system.

This European Standard specifies requirements and describes test methods for odorizing devices for CO2 low pressure systems which release an odorizing substance into the extinguishant during discharge. This European Standard is applicable to odorizing devices for CO2 low pressure systems, which are not pressurized before discharge. This European Standard should only be used as guidance for testing odorizing devices which work on different principles or odorizing devices for other systems.

This European Standard specifies requirements and test methods for mechanical weighing devices for continuous monitoring of containers of CO2-, Inert Gas- or Halocarbon Gas-Fire Extinguishing Installations.
This European Standard does not cover weighing devices for non-transportable containers which are filled and refilled on site, e.g. CO2-low-pressure containers.

This European Standard specifies requirements and test methods for for special fire detectors, other than fire detectors covered by EN 54, used inert gas- or halo-carbon-gas fire extinguishing systems. Special fire detectors are heat sensitive devices, including a mounting device, designed to react at a predetermined temperature by: - bursting of a glass bulb; - melting of a fusible element.

This European Standard specifies requirements and test methods for nozzles which introduce the extinguishing agent into a CO 2 protected zone. The design of the nozzles will influence discharge rate and thus the pressure drop in the piping network. The
extinguishing agent normally arrives at the nozzle in two-phase flow form (liquid-gaseous mixture). It expands into the protected volume to form a gas or a gas-and-dry-ice mixture depending on the nozzle type. This standard should only be used as guidance for testing nozzles which work on different principles.

This European standard specifies the requirements and describes test methods for check and non-return valves. This standard is applicable to check valves installed between container valve and manifold and non-return valves installed in pilot lines except those valves, which are tested in combination with non-electrical control devices. Non-return and check valves shall allow the passage in the direction of flow and they shall prevent flow in the reverse direction.

This document establishes the minimum requirements applicable to the design, installation, functioning, test and maintenance of fixed automatic fire extinguishing systems for kitchen protection that covers the cooking appliances, the hood, the plenum and the air extract ducts. This document also provides requirements for the construction and components performance as applicable to specific types, designs, sizes and arrangements of pre-engineered kitchen fire-extinguishing systems.
This document does not cover household kitchens or industrial food production equipment.
The detailed test procedures for the plenum and air extract ducts are contained in CEN/TS 17749.
Closed plenum type ventilated ceilings designed similar to standard hoods are included in this document. Open plenum type ventilated ceilings are excluded and require an engineered solution for the plenum protection. Protection for appliances below open or closed plenum ventilated ceilings are included.

This document specifies product characteristics and describes test methods for flexible connectors intended to be used in CO2, inert-gas or halocarbon gas-fire extinguishing systems.
This document covers connectors of the following types: Type 1 to Types 4 (see 3.8 to 3.11).
This document specifies procedures for assessment and verification of constancy (AVCP) of performance for characteristics of flexible connectors.
This document does not cover the following:
-   installation techniques for flexible connectors;
-   details on service life time and maintenance.

This European standard specifies oxygen reduction systems that are used as fire prevention systems by creating an atmosphere in an area which is having a lower permanent oxygen concentration as in ambient conditions. The level of oxygen reduction is defined by the individual risks of these areas (see Annex A). Oxygen reduction is achieved by technical systems which are providing a flux of air containing a reduced concentration of oxygen.
This European standard specifies minimum requirements and defines the specifications governing the design, installation and maintenance of fixed oxygen reduction systems with oxygen reduced air in buildings and industrial production plants. The standard also applies to the extension and modification of existing systems.
This European standard applies to oxygen reduction systems using nitrogen which are designed for continual oxygen reduction in enclosed spaces.
NOTE   Nitrogen is today the most suitable gas to be used for oxygen reduction. For other gases this European standard can be used as basis.
This European standard does not apply to oxygen reduction systems that use water mist or combustion gases.
The European standard does not apply to:
-   explosion suppression systems;
-   explosion prevention systems;
-   fire extinguishing systems using gaseous extinguishing agents;
-   inertization of portable containers;
-   systems in which oxygen levels are reduced for reasons other than fire prevention (e.g. steel processing in the presence of inert gas to avoid the formation of oxide film);
-   inerting required during repair work on systems or equipment (e.g. welding) in order to eliminate the risk of fire or explosion.
In addition to the conditions for the actual oxygen reduction system and its individual components this European standard also covers certain structural specifications for the protected area.
The space protected by an oxygen reduction system is a controlled and continuously monitored indoor climate for extended occupation. This standard does not cover unventilated confined spaces that may contain hazardous gases.

This European Standard specifies requirements and test methods for mechanical weighing devices for continuous monitoring of containers of CO2-, Inert Gas- or Halocarbon Gas-Fire Extinguishing Installations.
This European Standard does not cover weighing devices for non-transportable containers which are filled and refilled on site, e.g. CO2-low-pressure containers.

This European Standard specifies requirements and describes test methods for check and non-return valves intended to be used in gas extinguishing systems (i.e. CO2, inert gas or halocarbon gas) installed in buildings as a part of a complete operating system.
This European Standard is applicable to check valves installed between container valve and manifold and non-return valves installed in pilot lines, except those valves which are tested in combination with non-electrical control devices.

This European Standard specifies requirements and describes test methods for check and non-return valves intended to be used in gas extinguishing systems (i.e. CO2, inert gas or halocarbon gas) installed in buildings as a part of a complete operating system.
This European Standard is applicable to check valves installed between container valve and manifold and non-return valves installed in pilot lines, except those valves which are tested in combination with non-electrical control devices.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the IG-55 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressure of 150 bar, 200 bar and 300 bar at 15 °C. This does not preclude the use of other systems; however, design data for other pressures were not available at time of publication.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the IG-01 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressure of 160 bar, 200 bar and 300 bar at 15 °C. This does not preclude the use of other systems; however, design data for other pressures were not available at time of publication.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the IG-100 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressure of 160 bar, 200 bar and 300 bar at 15 °C. This does not preclude the use of other systems; however, design data for other pressures were not available at time of publication.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the
FK-5-1-12 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressures of 25 bar and 42 bar with nitrogen propellant. This does not preclude the use of other systems.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 125 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressures of 25 bar and 42 bar, superpressurized with nitrogen. This does not preclude the use of other systems.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the IG-541 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressure of 150 bar, 200 bar and 300 bar at 15 °C. This does not preclude the use of other systems; however, design data for other pressures were not available at time of publication.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 23 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressure of 41 bar without nitrogen superpressurization. This does not preclude the use of other systems.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 227ea extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressures of 25 bar and 42 bar with nitrogen propellant. This does not preclude the use of other systems.

This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the
HCFC Blend A extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressures of 25 bar and 42 bar with nitrogen propellant. This does not preclude the use of other systems.

This document specifies product characteristics and describes test methods for flexible and rigid connectors intended to be used in gas extinguishing systems (i.e. CO2, Inert Gas or Halocarbon gas) installed in buildings as a part of a complete operating system.
This document is applicable to the following connectors:
-   Type 1 and Type 5: used between container valves and the manifold
-   Type 3: used in pneumatic pilot lines
-   Type 2 and Type 4: used in distribution pipework of fire extinguishing installations downstream of the manifold/selector valve.

This document specifies requirements and test methods for room protection nozzles which introduce CO2, inert gas or halocarbon gas into a protected zone. The design of the nozzles will influence discharge rate and thus the pressure drop in the piping network. This standard is not applicable to local application nozzles.

This document specifies requirements and gives recommendations for the design, installation, testing, maintenance and safety of gas extinguishing systems in buildings, plants or other structures, and the characteristics of the various extinguishants and types of fire for which they are a suitable extinguishing medium.
This document describes total flooding systems primarily related to buildings, plants and other specific applications, utilizing electrically non-conducting gaseous fire extinguishants that do not leave a residue after discharge and for which there are sufficient data currently available to enable validation of performance and safety characteristics by an appropriate independent authority. This document is not applicable to explosion suppression.
This part of EN 15004 is not intended to indicate approval of the extinguishants listed therein by the appropriate authorities, as other extinguishants may be equally acceptable. CO2 is not included as it is covered by other International Standards.
This part of EN 15004 is applicable to the extinguishants listed in Table 1. This document is intended to be used in conjunction with the given parts of EN 15004 for fire extinguishing agents in Table 1.