SIST EN 14972-8:2020

SLOVENSKI STANDARD
oSIST prEN 14972-8:2019
01-januar-2019
9JUDMHQLJDVLOQLVLVWHPL6LVWHPLVSUãHþRYRGRGHO3URWRNROSUHVNXãDQMD
VLVWHPRY]RGSUWLPLãREDPL]DSRåDUQR]DãþLWRVWURMHYYRKLãMLKQDGPñ
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: prEN 14972-8
ICS:
13.220.10 Gašenje požara Fire-fighting
oSIST prEN 14972-8:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 14972-8:2019

---------------------- Page: 2 ----------------------
oSIST prEN 14972-8:2019


DRAFT
EUROPEAN STANDARD
prEN 14972-8
NORME EUROPÉENNE

EUROPÄISCHE NORM

November 2018
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 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, 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 NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14972-8:2018 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General requirements . 4
5 Enclosure requirements . 5
6 Machinery mock-up requirement . 7
7 Test equipment requirements . 10
8 Instrumentation requirements . 10
9 Fire tests . 12
9.1 General . 12
9.2 Low pressure, exposed, diesel spray fire. 12
9.3 Low pressure, angled, diesel spray fire . 13
9.4 Low pressure, concealed, diesel spray fire . 15
9.5 High pressure, exposed, diesel spray . 15
9.6 Low pressure-low flow, concealed, diesel spray and pool fires . 16
9.7 Concealed, heptane pol fire . 16
9.8 Flowing fire. 17
9.9 Wood crib and heptane pool fire . 17
10 Test report . 18

2

---------------------- Page: 4 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
European foreword
This document (prEN 14972-8:2018) 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.
3

---------------------- Page: 5 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
1 Scope
This document specifies fire testing requirements for water mist systems used for fire protection of
3
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.
prEN 14972-1, Fixed firefighting systems - Water mist systems - Part 1: Design, installation, inspection and
1)
maintenance
3 Terms and definitions
1)
For the purposes of this document, the terms and definitions given in prEN 14972-1 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
machinery enclosure

any enclosure containing equipment that uses fuel and/or lubrication fluids with volatilities less than or
equal to heptane
EXAMPLE Internal combustion engines (excluding engine test cells), oil pumps, oil tanks, fuel filters,
generators, transformer vaults, gear boxes, drive shafts, lubrication skids, diesel engine driven generators, and
other similar equipment using liquid hydrocarbon fuel and/or hydraulic, heat transfer, and lubrication fluids with
volatility less than or equal to heptane; enclosures with incidental use or storage of hydrocarbon ignitable liquids
(also known as flammable liquids) of not more than two 208 litre drums.
4 General requirements
4.1 The tests should be conducted until the fire is extinguished or supressed, as required by the
applicable fire test.
4.2 System components, component locations, operating conditions and test enclosure details shall
remain unaltered throughout all of the fire tests for a given application.
All fire tests should be conducted following the manufacturer’s instructions with 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.

1) This document is currently in preparation.
4

---------------------- Page: 6 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
4.3 In conjunction with the performance fire tests, all twin fluid water mist systems should be
subjected to a straight discharge test with no fire to evaluate the resulting discharge and oxygen
concentration.
This evaluation should 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 should be recorded at a location(s) within the test enclosure.
This information shall be used to evaluate personnel safety, and should be accounted for in the
manufacturer’s design, installation, operation, and maintenance manual.
5 Enclosure requirements
The maximum enclosure area (as specified by the manufacturer) shall be tested. Enclosures should
have equal length sides, although rectangular areas will be considered.
The maximum enclosure height (as specified by the manufacturer) shall be tested. Enclosure heights
shall be in 0,3 m increments. The enclosure should be constructed of wood or metal frame with an inner
lining of minimum 13 mm gypsum or 0,7 mm galvanized steel.
To minimize leakages, all joints and gaps shall be sealed. An opening measuring 2 m by 2 m and 0,5 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 1,0 m by 2,0 m should be installed
in opposite diagonal corners for heat and smoke release at the conclusion of the fire test. The floor
should be non-combustible and any floor drainage or vent openings should be sealed during testing.
A small louvered 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 should be centred in the test enclosure.
5

---------------------- Page: 7 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
Dimensions in metres

Key
1 tray for "Class A Fire Test"
2 bilge enclosure
3 test enclosure
4 opening
diameter pipe

Figure 1 — Test enclosure
6

---------------------- Page: 8 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
6 Machinery mock-up requirement
The machinery mock-up unit measures 3 m long by 1 m wide by 3 m high. It is fabricated from sheet
steel with a nominal thickness of 5 mm. A tray with a depth of 100 mm is formed at the top of the mock-
up unit. Two 300 mm diameter pipes, 3 m in length, are attached to the unit to simulate obstructions. A
0,7 m wide solid shelf is also connected to the unit, which provides a barrier to allow shielded fire tests
to be conducted.
A 200 mm by 50 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 m long by 4,0 m wide by 0,75 m
high.
2
A 4 m by 0,254 m high square pan should be located underneath the floor plate system.
7

---------------------- Page: 9 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
Dimensions in metres

Key

a 2
gap between engine and inside perimeter of bilge plate 5 tray (4 m )

b
notch for flowing fuel 6 wall
2
1 spraying and concealed oil spray 7 tray (4 m )
2
2 bilge steel plate 8 top tray (3 m )
3 bilge enclosure thermocouple

2
4 tray (0,1 m ) diameter pipe

Figure 2 — Machinery mock-up unit
8

---------------------- Page: 10 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
Dimensions in metres

Key

a
notch on side of top tray for flowing fuel on side of the engine mock-up
1 obstruction rod
2 flowing oil feed pipe DN 12
3 DN 300
4 steel plate
5 bilge plate
6 bilge wall
7 concealed spray
2
8 tray (4 m )
thermocouple

Figure 3 — Machinery mock-up unit (continued)
9

---------------------- Page: 11 ----------------------
oSIST prEN 14972-8:2019
prEN 14972-8:2018 (E)
7 Test equipment requirements
7.1 The test laboratory should be of adequate size with natural or minimal ventilation so as to not
interfere with the fire testing within the enclosure or about the mock-up or test fuel package.
The size of the test laboratory should not impact extinguishment of any test fires (i.e. depletion of
oxygen due to an inadequately sized test laboratory).
7.2 For all fire tests, the ceiling, floor, and walls should be as dry as possible, with only ambient
moisture content allowed. The relative humidity in the test enclosure should not significantly differ
from that of the ambient relative humidity.
7.3 The test enclosures or laboratory shall be at an ambient temperature of (20 ± 10) °C prior to the
start of the test. The enclosure or hall shall be at as uniform an ambient temperature as reasonably
possible. Localized hot or cold spots are not permitted. All non-fire induced drafts shall be eliminated.
7.4 The minimum operating nozzle pressure (as specified by the manufacturer) shall be used for all
tests, unless otherwise noted. System operating pressures shall be repeatable to within ± 5 %. If the
system pressures cannot be controlled within the specified tolerance, fire tests should be
...