prEN 15004-6

SLOVENSKI STANDARD
01-marec-2015
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Fixed firefighting systems - Gas extinguishing systems - Part 6: Physical properties and
system design of gas extinguishing systems for HFC 23 extinguishant
Ortsfeste Brandbekämpfungsanlagen - Löschanlagen mit gasförmigen Löschmitteln -
Teil 6: Physikalische Eigenschaften und Anlagenauslegung für Feuerlöschmittel HFC 23
Installations fixes de lutte contre l’incendie - Installations d’extinction à gaz - Partie 6:
Propriétés physiques et conception des systèmes pour agent extincteur HFC 23
Ta slovenski standard je istoveten z: prEN 15004-6
ICS:
13.220.20 3RåDUQD]DãþLWD Fire protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2014
ICS 13.220.20 Will supersede EN 15004-6:2008
English Version
Fixed firefighting systems - Gas extinguishing systems - Part 6:
Physical properties and system design of gas extinguishing
systems for HFC 23 extinguishant
Installations fixes de lutte contre l'incendie - Installations Ortsfeste Brandbekämpfungsanlagen - Löschanlagen mit
d'extinction à gaz - Partie 6: Propriétés physiques et gasförmigen Löschmitteln - Teil 6: Physikalische
conception des systèmes pour agent extincteur HFC 23 Eigenschaften und Anlagenauslegung für Feuerlöschmittel
HFC 23
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 191.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15004-6:2014 E
worldwide for CEN national Members.

Contents
Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Characteristics and uses .4
4.1 General .4
4.2 Use of HFC 23 systems .5
5 Safety of personnel.8
6 System design .9
6.1 Fill density .9
6.2 Superpressurization .9
6.3 Extinguishant quantity .9
7 Environmental properties . 11

Foreword
This document (prEN 15004-6:2014) has been prepared by Technical Committee CEN/TC 191 “Fixed
firefighting systems”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15004-6:2008.
EN 15004 consists of the following parts, under the general title Fixed firefighting systems – Gas extinguishing
systems:
 Part 1: Design, installation and maintenance”
 Part 2: Physical properties and system design of gas extinguishing systems for FK-5-1-12 extinguishant”
 Part 3: Physical properties and system design of gas extinguishing systems for HCFC Blend A
extinguishant”
 Part 4: Physical properties and system design of gas extinguishing systems for HFC 125 extinguishant”
 Part 6: Physical properties and system design of gas extinguishing systems for HFC 23 extinguishant”
 Part 7: Physical properties and system design of gas extinguishing systems for IG-01 extinguishant “
 Part 8: Physical properties and system design of gas extinguishing systems for IG-100 extinguishant”
 Part 9: Physical properties and system design of gas extinguishing systems for IG-55 extinguishant”
 Part 10: Physical properties and system design of gas extinguishing systems for IG-541 extinguishant”
1 Scope
This part of EN 15004 contains 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 a nominal pressure of 41 bar without nitrogen superpressurization
and 70 bar superpressurized with nitrogen.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 15004-1, Gaseous fire-extinguishing systems — Physical properties and system design — Part 1: General
requirements.
3 Terms and definitions
For the purposes of this part of EN 15004, the terms and definitions given in EN 15004-1 apply.
4 Characteristics and uses
4.1 General
Extinguishant HFC 23 shall comply with the specification shown in Table 1.
HFC 23 is a colourless, almost odourless, electrically non-conductive gas with a density approximately 2,4
times that of air.
The physical properties are shown in Table 2.
HFC 23 extinguishes fires mainly by physical means, but by some chemical means.
Table 1 — Specification for HFC 23
Property Requirement
Purity 99,6 % (mol/mol), min.
–6
Acidity
3 × 10 by mass, max.
–6
Water content
10 × 10 by mass, max.
Non-volatile 0,01 % by mass, max.
residue
Suspended matter None visible
or sediment
Table 2 — Physical properties of HFC 23
Property Units Value
Molecular mass — 70
Boiling point at 1,013 bar (absolute) -82,0
°C
Freezing point -155,2
°C
Critical temperature 25,9
°C
Critical pressure bar abs 48,36
Critical volume cm /mol 133
Critical density kg/m 525
Vapour pressure 20 °C bar abs 41,80
Liquid density 20 °C kg/m 806,6
Saturated vapour density 20 °C kg/m 263,0
Specific volume of superheated vapour m /kg 0,3409
at 1,013 bar and 20 °C
Chemical formula CHF
Chemical name
Trifluoromethane
4.2 Use of HFC 23 systems
HFC 23 total flooding systems may be used for extinguishing fires of all classes within the limits specified in
clause 4 of EN 15004-1.
The extinguishant requirements per volume of protected space are shown in Table 3 for various levels of
concentration. These are based on methods shown in 7.6 of EN 15004-1.
The extinguishing concentrations and design concentrations for n-heptane and surface class A hazards are
shown in Table 4. Concentrations for acetone heptane, methanol and toluene are shown in Table 5, and
inerting concentrations are shown in Table 6.
p
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