Fixed firefighting systems - Gas extinguishing systems - Part 4: Physical properties and system design of gas extinguishing systems for HFC 125 extinguishant (ISO 14520-8:2019, modified)

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

Ortsfeste Brandbekämpfungsanlagen - Löschanlagen mit gasförmigen Löschmitteln - Teil 4: Physikalische Eigenschaften und Anlagenauslegung für Feuerlöschmittel HFC 125 (ISO 14520-8:2019, modifiziert)

Dieses Dokument legt Anforderungen an Löschanlagen mit gasförmigen Löschmitteln fest, bei denen HFC 125 als Löschmittel angewendet wird. Es enthält Einzelheiten zu physikalischen Eigenschaften, zur Spezifikation, zum Einsatz und zu Sicherheitsaspekten.
Dieses Dokument ist für Anlagen anwendbar, die bei Nenndrücken von 25 bar und 42 bar mit Stickstoff als Treibgas beaufschlagt werden. Dies schließt nicht die Anwendung anderer Anlagen aus.

Installations fixes de lutte contre l’incendie - Installations d’extinction à gaz - Partie 4 : Propriétés physiques et conception des systèmes pour agent extincteur HFC 125 (ISO 14520-8:2019, modifiée)

Le présent document spécifie des exigences spécifiques relatives aux installations d’extinction à gaz contenant de l’agent extincteur HFC 125. Il inclut des détails relatifs à ses propriétés physiques, sa spécification, son usage ainsi que ses aspects de sécurité.
Le présent document s’applique aux systèmes fonctionnant à des pressions nominales de 25 bar et de 42 bar, surpressurisés à l’azote. Cela n’exclut pas l’utilisation d’autres installations.

Vgrajeni gasilni sistemi - Sistemi za gašenje s plinom - 4. del: Fizikalne lastnosti in načrtovanje sistema za gašenje s plinom za gasilo HFC 125 (ISO 14520-8:2019, spremenjen)

General Information

Status
Published
Public Enquiry End Date
09-Sep-2019
Publication Date
11-Nov-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
19-Oct-2020
Due Date
24-Dec-2020
Completion Date
12-Nov-2020

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SLOVENSKI STANDARD
SIST EN 15004-4:2020
01-december-2020
Nadomešča:
SIST EN 15004-4:2008

Vgrajeni gasilni sistemi - Sistemi za gašenje s plinom - 4. del: Fizikalne lastnosti in

načrtovanje sistema za gašenje s plinom za gasilo HFC 125 (ISO 14520-8:2019,
spremenjen)

Fixed firefighting systems - Gas extinguishing systems - Part 4: Physical properties and

system design of gas extinguishing systems for HFC 125 extinguishant (ISO 14520-
8:2019, modified)

Ortsfeste Brandbekämpfungsanlagen - Löschanlagen mit gasförmigen Löschmitteln - Teil

4: Physikalische Eigenschaften und Anlagenauslegung für Feuerlöschmittel HFC 125
(ISO 14520-8:2019, modifiziert)

Installations fixes de lutte contre l’incendie - Installations d’extinction à gaz - Partie 4 :

Propriétés physiques et conception des systèmes pour agent extincteur HFC 125 (ISO

14520-8:2019, modifiée)
Ta slovenski standard je istoveten z: EN 15004-4:2020
ICS:
13.220.10 Gašenje požara Fire-fighting
SIST EN 15004-4:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 15004-4:2020
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SIST EN 15004-4:2020
EN 15004-4
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2020
EUROPÄISCHE NORM
ICS 13.220.20 Supersedes EN 15004-4:2008
English Version
Fixed firefighting systems - Gas extinguishing systems -
Part 4: Physical properties and system design of gas
extinguishing systems for HFC 125 extinguishant (ISO
14520-8:2019, modified)

Installations fixes de lutte contre l'incendie - Ortsfeste Brandbekämpfungsanlagen - Löschanlagen

Installations d'extinction à gaz - Partie 4 : Propriétés mit gasförmigen Löschmitteln - Teil 4: Physikalische

physiques et conception des systèmes pour agent Eigenschaften und Anlagenauslegung für

extincteur HFC 125 (ISO 14520-8:2019, modifiée) Feuerlöschmittel HFC 125 (ISO 14520-8:2019,

modifiziert)
This European Standard was approved by CEN on 17 August 2020.

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. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15004-4:2020 E

worldwide for CEN national Members.
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SIST EN 15004-4:2020
EN 15004-4:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Characteristics and uses ............................................................................................................................... 5

4.1 General ................................................................................................................................................................ 5

4.2 Use of HFC 125 systems ................................................................................................................................. 6

5 Safety of personnel ......................................................................................................................................... 9

6 System design ................................................................................................................................................ 10

6.1 Fill density ...................................................................................................................................................... 10

6.2 Superpressurization ................................................................................................................................... 11

6.3 Extinguishant quantity ............................................................................................................................... 11

6.4 Other fill density and superpressurization levels ............................................................................ 12

7 Environmental properties ........................................................................................................................ 13

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SIST EN 15004-4:2020
EN 15004-4:2020 (E)
European foreword

This document (EN 15004-4:2020) has been prepared by Technical Committee CEN/TC 191 “Fixed

firefighting systems”, the secretariat of which is held by BSI.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by April 2021, and conflicting national standards shall be

withdrawn at the latest by April 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 15004-4:2008.

The main changes in EN 15004-4:2020 compared to EN 15004-4:2008 are the following:

— European foreword: Part 3 was removed from the list;
— Foreword of ISO 14520-8 was removed;
— 6.4, Other fill density and superpressurization levels: new sub-clause added;
— Clause 7, Environmental properties: new clause added.

The text of the International Standard ISO 14520-8:2019 from Technical Committee ISO/TC 21

“Equipment for fire protection and firefighting” of the International Organization for Standardization

(ISO) has been taken over as a European Standard by Technical Committee CEN/TC 191 “Fixed

firefighting systems”, the secretariat of which is held by BSI.

EN 15004 will consist 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 4: Physical properties and system design of gas extinguishing systems for HFC 125 extinguishant;

— Part 5: Physical properties and system design of gas extinguishing systems for HFC 227ea

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.

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SIST EN 15004-4:2020
EN 15004-4:2020 (E)

The International Standards ISO 14520-2 and ISO 14520-11, which dealt with CF I and HFC 236fa

extinguishants, respectively, have not been implemented by CEN, as CF I is only valid for local

application and HFC 236fa extinguishant is only applicable for portable fire extinguishers and local

application, respectively, which is not covered by the scope.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
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SIST EN 15004-4:2020
EN 15004-4:2020 (E)
1 Scope

This document specifies requirements for gaseous fire-extinguishing systems, with respect to the

HFC 125 extinguishant. It includes details of physical properties, specification, usage and safety aspects.

This document is applicable for systems operating at nominal pressures of 25 bar and 42 bar,

superpressurized with nitrogen. This does not preclude the use of other systems.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 15004-1:2019, Fixed firefighting systems — Gas extinguishing systems — Part 1: Design, installation

and maintenance (ISO 14520-1:2015, modified)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 15004-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Characteristics and uses
4.1 General
Extinguishant HFC 125 shall comply with the specification shown in Table 1.

HFC 125 is a colourless, almost odourless, electrically non-conductive gas, with a density approximately

four times that of air.
The physical properties are shown in Table 2.

HFC 125 extinguishes fires mainly by physical means, but also by some chemical means.

Table 1 — Specification for HFC 125
Property Requirement
Purity 99,6 % by mass, min.
Acidity –4 %
3 × 10 by mass (3 parts
per million), max.
Water content –4 %
10 × 10 by mass (10 parts
per million), max.
Non-volatile residue 0,01 % by mass, max.
Suspended matter or None visible
sediment
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SIST EN 15004-4:2020
EN 15004-4:2020 (E)
Table 2 — Physical properties of HFC 125
Property Units Value
Molecular mass — 120,02
Boiling point at 1,013 bar °C −48,09
(absolute)
Freezing point °C −101
Critical temperature °C 66,02
Critical pressure bar abs 36,18
Critical volume 3 210
cm /mol
Critical density 3 573,6
kg/m
Vapour press
...

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