Fixed firefighting systems - Water mist systems - Part 6: Test protocol for false floors and false ceilings for automatic nozzle systems

This document specifies the evaluation of the firefighting performance of water mist systems for false ceilings and false floors with heights between 300 mm and 800 mm.
This fire test protocol is applicable to pendent or upright automatic nozzles to be used in unlimited volume.
This document is applicable for horizontal, solid, flat ceilings.
It is not possible to apply these tests to other applications than the ones specified within this fire test protocol.

Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 6: Brandversuchsprotokoll für Zwischenböden und Zwischendecken für automatische Düsensysteme

Dieses Dokument legt die Beurteilung des Brandbekämpfungsverhaltens von Wassernebelsystemen für Zwischenböden und Zwischendecken mit Höhen zwischen 300 mm und 800 mm fest.
Dieses Brandversuchsprotokoll ist anwendbar für hängende oder stehende automatische Düsen zur Verwendung ohne Volumenbegrenzung.
Dieses Dokument ist anwendbar für waagerechte, massive, ebene Decken.
Es ist nicht möglich, diese Versuche auf andere als die in diesem Brandversuchsprotokoll festgelegten Anwendungen anzuwenden.

Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 6 : Protocole d'essai des systèmes à buses automatiques pour faux-planchers et faux-plafonds

Le présent document spécifie l'évaluation des performances de lutte contre l'incendie du système à brouillard d'eau pour les faux-plafonds et faux-planchers d'une hauteur comprise entre 300 mm et 800 mm.
Le présent protocole d'essai au feu est applicable aux buses automatiques de type pendant ou debout, à utiliser dans des volumes illimités.
Le présent document est applicable aux plafonds horizontaux, pleins et plans.
Il n'est pas possible de réaliser ces essais pour des applications autres que celles spécifiées dans le présent protocole d'essai au feu.

Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 6. del: Protokol preskušanja sistemov s samodejnimi šobami za privzdignjene pode in viseče strope

General Information

Status
Published
Publication Date
23-May-2023
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
24-May-2023
Due Date
04-Oct-2023
Completion Date
24-May-2023

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SLOVENSKI STANDARD
SIST EN 14972-6:2023
01-september-2023
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 6. del: Protokol preskušanja
sistemov s samodejnimi šobami za privzdignjene pode in viseče strope
Fixed firefighting systems - Water mist systems - Part 6: Test protocol for false floors and
false ceilings for automatic nozzle systems
Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 6: Prüfprotokoll für
Zwischenböden und Zwischendecken für automatische Düsensysteme
Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 6 :
Protocole d'essai des systèmes à buses automatiques pour faux-planchers et faux-
plafonds
Ta slovenski standard je istoveten z: EN 14972-6:2023
ICS:
13.220.10 Gašenje požara Fire-fighting
SIST EN 14972-6:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 14972-6:2023

---------------------- Page: 2 ----------------------
SIST EN 14972-6:2023


EN 14972-6
EUROPEAN STANDARD

NORME EUROPÉENNE

May 2023
EUROPÄISCHE NORM
ICS 13.220.20
English Version

Fixed firefighting systems - Water mist systems - Part 6:
Test protocol for false floors and false ceilings for
automatic nozzle systems
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen -
à brouillard d'eau - Partie 6 : Protocole d'essai des Wassernebelsysteme - Teil 6: Brandversuchsprotokoll
systèmes à buses automatiques pour faux-planchers et für Zwischenböden und Zwischendecken für
faux-plafonds automatische Düsensysteme
This European Standard was approved by CEN on 17 April 2023.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14972-6:2023 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST EN 14972-6:2023
EN 14972-6:2023 (E)
Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 5
5 Fuel packages . 6
5.1 General. 6
5.2 False ceiling / false floor mock-up requirements . 9
5.3 Cable trays . 9
5.4 Cables . 9
5.5 Conditioning of the fuel load . 10
5.6 Ignition source . 10
6 Test arrangement . 10
6.1 Reference sprinkler requirements . 10
6.1.1 General. 10
6.1.2 Reference sprinkler tests . 11
6.2 Water mist system requirements . 11
7 Test equipment requirements . 11
8 Instrumentation requirements . 12
8.1 General. 12
8.2 Temperature. 12
8.3 Pressure . 12
8.4 Time . 13
9 Test criteria . 13
9.1 General. 13
9.2 Fire tests . 13
9.3 Evaluation of test results . 14
10 Test report . 14
Bibliography . 15

2

---------------------- Page: 4 ----------------------
SIST EN 14972-6:2023
EN 14972-6:2023 (E)
European foreword
This document (EN 14972-6:2023) 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 November 2023, and conflicting national standards shall
be withdrawn at the latest by November 2023.
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.
The EN 14972 series, published under the general title Fixed firefighting systems — Water mist systems,
consists of the following parts. This list includes standards that are in preparation, and other standards
can be added. For the current status of published standards, refer to www.cencenelec.eu.
— Part 1: Design, installation, inspection and maintenance;
— Part 2: Test protocol for shopping areas for automatic nozzle systems;
— Part 3: Test protocol for office, school classrooms and hotel for automatic nozzle systems;
— Part 4: Test protocol for non-storage occupancies for automatic nozzle systems;
— Part 5: Test protocol for car garages for automatic nozzle systems;
— Part 6: Test protocol for false floors and false ceilings for automatic nozzle systems;
— Part 7: Test protocol for commercial low hazard occupancies for automatic nozzle systems;
3
— Part 8: Test protocol for machinery in enclosures exceeding 260 m for open nozzle systems;
3
— Part 9: Test protocol for machinery in enclosures not exceeding 260 m for open nozzle systems;
— Part 10: Test protocol for atrium protection with sidewall nozzles for open nozzle systems;
— Part 11: Test protocol for cable tunnels for open nozzle systems;
— Part 12: Test protocol for commercial deep fat cooking fryers for open nozzle systems;
— Part 13: Test protocol for wet benches and other similar processing equipment for open nozzle systems;
3
— Part 14: Test protocol for combustion turbines in enclosures exceeding 260 m for open nozzle systems;
3
— Part 15: Test protocol for combustion turbines in enclosures not exceeding 260 m for open nozzle
systems;
— Part 16: Test protocol for industrial oil cookers for open nozzle systems;
— Part 17: Test protocol for residential occupancies for automatic nozzle systems.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
3

---------------------- Page: 5 ----------------------
SIST EN 14972-6:2023
EN 14972-6:2023 (E)
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, Türkiye and the United
Kingdom.
4

---------------------- Page: 6 ----------------------
SIST EN 14972-6:2023
EN 14972-6:2023 (E)
1 Scope
This document specifies the evaluation of the firefighting performance of water mist systems for false
ceilings and false floors with heights between 300 mm and 800 mm.
This fire test protocol is applicable to pendent or upright automatic nozzles to be used in unlimited
volume.
This document is applicable for horizontal, solid, flat ceilings.
It is not possible to apply these tests to other applications than the ones specified within this fire test
protocol.
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 12259-1, Fixed firefighting systems - Components for sprinkler and water spray systems - Part 1:
Sprinklers
EN 12845, Fixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance
EN 13501-1:2018, Fire classification of construction products and building elements - Part 1: Classification
using data from reaction to fire tests
EN 14972-1:2020, Fixed firefighting systems - Water mist systems - Part 1: Design, installation, inspection
and maintenance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14972-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 General requirements
4.1 Up to a maximum of 5 nozzles used in the fire tests shall be kept for later verification.
4.2 The water mist system, operating without manual intervention, shall successfully complete all
described performance fire tests.
4.3 The fire load shall be taken from the conditioning area and arranged into the test area just before
conducting the test.
4.4 The water flow shall be shut-off 10 min after the activation of the first sprinkler/automatic nozzle.
Any remaining fire shall be manually extinguished and the fire damage shall be recorded.
4.5 Prior to the testing, a layout of the water mist system to be tested shall be submitted for test
preparation purposes. This layout shall include any components required for the testing as well as the
full dimensioning (e.g. length of pipes, distances of automatic nozzles/sprinklers, etc.).
5

---------------------- Page: 7 ----------------------
SIST EN 14972-6:2023
EN 14972-6:2023 (E)
4.6 System components, component locations, operating conditions and test mock-up details shall
remain unaltered throughout all of the fire tests for a given application.
4.7 All fire tests shall be conducted using the manufacturer instructions in regard to automatic nozzle
placement, spray flux, and operating pressure. Sprays shall not be intermittent.
4.8 The test protocol is only applicable to pendent or upright mounted automatic nozzles.
4.9 The water supply shall be capable of supplying a flow rate and pressure at the minimum operating
pressure and flow rate of the automatic nozzle as specified by the manufacturer. These parameters shall
be met based on the actual layout of the pipework installation as used in the test scenario.
4.10 The tests with the water mist system shall be conducted at maximum spacing and minimum
discharge conditions regarding water flow and pressure as specified by the manufacturer for this
application. The system shall be installed to achieve the maximum allowed time delay of water pressure
build-up of the system.
5 Fuel packages
5.1 General
The test assembly to be provided for the tests by the applicant shall comply with the following
specifications and figures.
The test scenario is based on a typical false ceiling layout comprising the appropriate fire load in terms
of cabling.
The test assembly shall include the following elements:
a) housing;
b) cable trays;
c) cables as fire load;
d) heptane pan (200
...

SLOVENSKI STANDARD
oSIST prEN 14972-6:2022
01-julij-2022
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 6. del: Protokol preskušanja
sistemov s samodejnimi šobami za privzdignjene pode in viseče strope
Fixed firefighting systems - Water mist systems - Part 6: Test protocol for false floors and
false ceilings for automatic nozzle systems
Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 6: Prüfprotokoll für
Zwischenböden und Zwischendecken für automatische Düsensysteme
Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 6 :
Protocole d'essai des systèmes à buses automatiques pour faux-planchers et faux-
plafonds
Ta slovenski standard je istoveten z: prEN 14972-6
ICS:
13.220.10 Gašenje požara Fire-fighting
oSIST prEN 14972-6:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 14972-6:2022

---------------------- Page: 2 ----------------------
oSIST prEN 14972-6:2022


DRAFT
EUROPEAN STANDARD
prEN 14972-6
NORME EUROPÉENNE

EUROPÄISCHE NORM

April 2022
ICS 13.220.20
English Version

Fixed firefighting systems - Water mist systems - Part 6:
Test protocol for false floors and false ceilings for
automatic nozzle systems
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen -
à brouillard d'eau - Partie 6 : Protocole d'essai des Wassernebelsysteme - Teil 6: Prüfprotokoll für
systèmes à buses automatiques pour faux-planchers et Zwischenböden und Zwischendecken für automatische
faux-plafonds Düsensysteme
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, 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.

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: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14972-6:2022 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 14972-6:2022
prEN 14972-6:2022 (E)

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General requirements . 4
5 Fuel packages . 5
5.1 General. 5
5.2 False ceiling enclosure requirements . 7
5.3 Cable trays . 8
5.4 Cables . 8
5.5 Conditioning of the fuel load . 8
5.6 Ignition source . 9
6 Test arrangement . 9
6.1 Reference sprinkler requirements . 9
6.2 Water mist system requirements . 10
7 Test equipment requirements . 10
8 Instrumentation requirements . 11
8.1 General. 11
8.2 Temperature. 11
8.3 Pressure . 11
8.4 Time . 11
9 Test criteria . 12
9.1 General. 12
9.2 Fire tests . 12
9.3 Evaluation of test results . 13
10 Test report . 14
Bibliography . 15

2

---------------------- Page: 4 ----------------------
oSIST prEN 14972-6:2022
prEN 14972-6:2022 (E)
European foreword
This document (prEN 14972-6:2022) 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.
EN 14972, Fixed firefighting systems — Water mist systems, consists of the following parts:
— Part 1: Design, installation, inspection and maintenance
— Part 2: Test protocol for shopping areas for automatic nozzle systems
— Part 3: Test protocol for office, school class rooms and hotel for automatic nozzle systems
— Part 4: Test protocol for non-storage occupancies for automatic nozzle systems
— Part 5: Test protocol for car garages for automatic nozzle systems
— Part 6: Test protocol for false floors and false ceilings for automatic nozzle systems
— Part 7: Test protocol for commercial low hazard occupancies for automatic nozzle systems
3
— Part 8: Test protocol for machinery in enclosures exceeding 260 m for open nozzle systems
3
— Part 9: Test protocol for machinery in enclosures not exceeding 260 m for open nozzle systems
— Part 10: Test protocol for atrium protection with sidewall nozzles for open nozzle systems
— Part 11: Test protocol for cable tunnels for open nozzle systems
— Part 12: Test protocol for commercial deep fat cooking fryers for open nozzle systems
— Part 13: Test protocol for wet benches and other similar processing equipment for open nozzle systems
3
— Part 14: Test protocol for combustion turbines in enclosures exceeding 260 m for open nozzle systems
3
— Part 15: Test protocol for combustion turbines in enclosures not exceeding 260 m for open nozzle
systems
— Part 16: Test protocol for industrial oil cookers for open nozzle systems
— Part 17: Test protocol for residential occupancies for automatic nozzle systems
NOTE This list includes standards that are in preparation and other standards may be added. For
current status of published standards refer to www.cencenelec.eu.
3

---------------------- Page: 5 ----------------------
oSIST prEN 14972-6:2022
prEN 14972-6:2022 (E)

1 Scope
This document specifies the evaluation of the firefighting performance of water mist systems for false
ceilings and false floors with heights between 300 mm and 800 mm.
This fire test protocol is applicable to pendent or upright automatic nozzles to be used in unlimited
volume.
This document is applicable for horizontal, solid, flat ceilings.
It is not possible to apply these tests to other applications than the ones specified within this fire test
protocol.
In case of a positive result of the tests, the water mist system can be applied for the protection of the
following risks:
False ceilings and false floors between 300 mm and 800 mm.
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 12259-1, Fixed firefighting systems — Components for sprinkler and water spray systems — Part 1:
Sprinklers
EN 12845, Fixed firefighting systems — Automatic sprinkler systems — Design, installation and
maintenance
EN 13501-1:2018, Fire classification of construction products and building elements — Part 1:
Classification using data from reaction to fire tests
EN 14972-1:2020, Fixed firefighting systems — Water mist systems — Part 1: Design, installation,
inspection and maintenance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14972-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 General requirements
4.1 Up to a maximum of 5 nozzles used in the fire tests shall be kept for later verification.
4.2 The water mist system, operating without manual intervention, shall successfully complete all
described performance fire tests.
4.3 The fire load shall be taken from the conditioning area and arranged into the test area just before
conducting the test.
4

---------------------- Page: 6 ----------------------
oSIST prEN 14972-6:2022
prEN 14972-6:2022 (E)
4.4 The water flow shall be shut-off 10 min after the activation of the first sprinkler/automatic nozzle.
Any remaining fire shall be manually extinguished and the fire damage shall be recorded.
4.5 Prior to the testing, a layout of the water mist system to be tested shall be submitted for test
preparation purposes. This layout shall include any components required for the testing as well as the
full dimensioning (e.g. length of pipes, distances of automatic nozzles/sprinklers, etc.).
4.6 System components, component locations, operating conditions and test enclosure details shall
remain unaltered throughout all of the fire tests for a given application.
4.7 All fire tests shall be conducted using the manufacturer instructions in regard to automatic nozzle
placement, spray flux, and operating pressure. Sprays shall not be intermittent.
4.8 The test protocol is only applicable to pendent or upright mounted automatic nozzles.
4.9 The water supply shall be capable of supplying a flow rate and pressure at the minimum operating
pressure and flow rate of the automatic nozzle as specified by the manufacturer. These parameters shall
be met based on the actual layout of the pipework installation as used in the test scenario.
4.10 The tests with the water mist system shall be conducted at maximum spacing and minimum
discharge conditions regarding water flow and pressure as specified by the manufacturer for this
application. The system shall be installed to achieve the maximum allowed time delay of water pressure
build-up of the system.
5 Fuel packages
5.1 General
The test assembly to be provided for the tests by the applicant shall comply with the following
specifications and figures.
The test scenario is based on a typical false ceiling layout comprising the appropriate fire load in terms
of cabling.
The test assembly shall include the following elements:
a) housing;
b) cable trays;
c) cables as fire load;
d) heptane pan as ignition source.
Figure 1 shows an example of the test assembly in accordance with the requirements specified in this
clause.
5

---------------------- Page: 7 ----------------------
oSIST prEN 14972-6:2022
prEN 14972-6:2022 (E)

Dimensions in millimetres

Key
1 wall combustible (plywood ~5 mm) 5 tray 1
2 heptane pan cables

3 raw ceiling thermocouple

4 tray 2
Figure 1 — Assembly of fire loads and position of ignition source (side view)
6

...

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