EN 14972-8:2020

SLOVENSKI STANDARD
01-marec-2020
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 8. del: Protokol preskušanja
sistemov z odprtimi šobami za požarno zaščito strojev v ohišjih nad 260 m³
Fixed firefighting systems - Water mist systems - Part 8- Test protocol for machinery in
enclosures exceeding 260 m³ for open nozzle systems
Ortsfeste Brandbekämpfungsanlagen - Feinsprüh-Löschanlagen - Teil 8: Prüfprotokoll
für Maschinen in Gehäusen über 260 m³ für offene Düsensysteme
Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 8 :
Protocole d'essai des systèmes à buses ouvertes pour machines situées dans des
enceintes de plus de 260 m³
Ta slovenski standard je istoveten z: EN 14972-8:2020
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14972-8
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2020
EUROPÄISCHE NORM
ICS 13.220.20
English Version
Fixed firefighting systems - Water mist systems - Part 8-
Test protocol for machinery in enclosures exceeding 260
m³ for open nozzle systems
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen - Feinsprüh-
à brouillard d'eau - Partie 8 : Protocole d'essai des Löschanlagen - Teil 8: Prüfprotokoll für Maschinen in
systèmes à buses ouvertes pour machines situées dans Gehäusen über 260 m³ für offene Düsensysteme
des enceintes de plus de 260 m³
This European Standard was approved by CEN on 11 November 2019.

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 14972-8:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General requirements . 4
5 Test enclosure requirements . 5
6 Machinery mock-up requirement . 7
7 Test equipment requirements . 9
8 Instrumentation requirements . 10
9 Fire tests requirements . 11
9.1 General . 11
9.2 Low pressure, exposed, diesel spray fire. 12
9.3 Low pressure, angled, diesel spray fire . 12
9.4 Low pressure, concealed, diesel spray fire . 14
9.5 High pressure, exposed, diesel spray . 14
9.6 Low pressure-low flow, concealed, diesel spray and pool fires . 15
9.7 Concealed, heptane pool fire . 15
9.8 Flowing fire. 16
9.9 Wood crib and heptane pool fire . 16
10 Test report . 17

European foreword
This document (EN 14972-8:2020) 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 July 2020 and conflicting national standards shall be
withdrawn at the latest by July 2020.
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.
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 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;
— Part 8: Test protocol for machinery in enclosures exceeding 260 m for open nozzle systems;
— 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;
— Part 14: Test protocol for combustion turbines in enclosures exceeding 260 m for open nozzle systems;
— 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.
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.
1 Scope
This document specifies fire testing requirements for water mist systems used for fire protection of
machinery in enclosures with volumes exceeding 260 m .
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.
1)
EN 14972-1:— , Fixed firefighting systems — Water mist systems — Part 1: Design, installation,
inspection and maintenance
3 Terms and definitions
1)
For the purposes of this document, the terms and definitions given in EN 14972-1 and the following
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 https://www.electropedia.org/
3.1
machinery enclosure
any enclosure containing equipment that uses fuel and/or lubrication fluids with
volatilities less than or equal to heptane
4 General requirements
4.1 The water mist system, operating without manual intervention, shall successfully complete all
described performance fire tests for their specific applications.
4.2 The fire tests shall be conducted until the fire is extinguished, as required by the applicable fire
test.
4.3 System components, component locations, operating conditions and test enclosure details shall
remain unaltered throughout all of the fire tests for a given application.
4.4 All fire tests shall be conducted using the specifications from the manufacturer’s DIOM manual in
regard to nozzle placement, spray flux, and spray duration. Sprays can be continuous or intermittent in
time. In the case of intermittent, or cycled, sprays, the time period during which the system is not
discharging shall not be greater than 50 % of one complete on/off cycle. The system off period shall not
exceed one minute.
4.5 In conjunction with the performance fire tests, all twin fluid water mist systems (except for those
applying compressed air) shall be subjected to a straight discharge test with no fire to evaluate the
resulting discharge and oxygen concentration. This evaluation shall be conducted using the maximum
extinguishing agent flow and pressure. The discharge duration for the test shall be the maximum
required for the system and occupancy to be protected. Oxygen measurements shall be recorded at a

1) Under preparation. Stage at the time of publication: prEN 14972-1:2019.
location(s) within the test enclosure. This information shall be used to evaluate personnel safety, and
shall be accounted for in the manufacturer’s DIOM manual.
4.6 Up to a maximum of 5 nozzles used in the fire tests shall be kept for later verification.
5 Test enclosure requirements
The maximum enclosure volume (as specified by the manufacturer) shall be tested. The enclosure area
should be preferable squared. If this is not possible length sides shall not exceed 2.5:1 ratio. In any case,
the length of any of the sides shall be at least 8,00 m.
The maximum enclosure height (as specified by the manufacturer) shall be tested. The enclosure shall
be constructed of wood or metal frame with an inner lining of minimum 13,00 mm gypsum or 0,70 mm
galvanized steel.
To minimize leakages, all joints and gaps shall be sealed. An opening measuring 2,00 m by 2,00 m and
0,50 m above the floor level shall be installed in the centre of one wall, as shown in Figure 1.
A minimum of two hinged ceiling hatches measuring approximately 1,00 m by 2,00 m shall be installed
in opposite diagonal corners for heat and smoke release at the conclusion of the fire test. The floor shall
be non-combustible and any floor drainage or vent openings shall be sealed during testing.
A small vent can be provided to allow the intake of air, to prevent excessive suctioning of the walls and
ceiling and maintain structural integrity of the fire test enclosure.
The machinery mock-up unit shall be centred in the test enclosure.
Dimensions in metres
Key
1 tray for “Class A Fire Test”
2 bilge enclosure
3 test enclosure
4 opening
5 steel pipe
Figure 1 — Test enclosure
6 Machinery mock-up requirement
The machinery mock-up unit measures 3,00 m long by 1,00 m wide by 3,00 m high. It is fabricated from
sheet steel with a nominal thickness of 5,00 mm. A tray with a depth of 100,00 mm is formed at the top
of the mock-up unit. Two 300,00 mm diameter pipes, 3,00 m in length, are attached to the unit to
simulate obstructions. A 0,70 m wide solid shelf is also connected to the unit, which provides a barrier
to allow shielded fire tests to be conducted.
A 200,00 mm by 50,00 mm notch is cut into the side of the top tray opposite the solid shelf for the
purposes of the flowing fire test (see Figure 2 and 3).
The mock-up unit shall be surrounded by a steel floor plate system, 6,00 m long by 4,00 m wide by
0,75 m high.
A 4,00 m by 0,254 m high square tray shall be located underneath the floor plate system.
Dimensions in metres
Key
a) front view b) top view
1 exposed and concealed spray nozzle 7 top tray (3,00 m )
2 bilge steel plate 8 solid steel plate (5,00 mm)
3 bilge enclosure 9 steel pipes
tray (0,10 m )
4 10 gap between engine and inside perimeter of bilge plate
5 tray (4,00 m ) thermocouple
6 location for notch for flowing fuel
Figure 2 — Machinery mock-up unit
Dimensions in metres
Key
1 obstruction rod 6 bilge enclosure
2 flowing oil feed pipe DN 12 7 concealed oil spray
3 steel pipes 8 tray (4,00 m )
a
4 engine mock-up notch for flowing fuel
5 bilge steel plate thermocouple

Figure 3 — Machinery mock-up unit (continued)
7 Test equipment requirements
7.1 The test laboratory s
...