Fixed firefighting systems - Water mist systems - Part 14: Test protocol for combustion turbines in enclosures exceeding 260 m³ for open nozzle systems

This document specifies the evaluation of the fire performance for water mist systems used for fire protection of combustion turbines in enclosures with volumes exceeding 260 m³.

Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 14: Brandversuchsprotokoll für Verbrennungsturbinen in Gehäusen über 260 m³ für offene Düsensysteme

Dieses Dokument legt die Bewertung des Brandverhaltens von Wassernebelsystemen fest, die für den Brandschutz von Verbrennungsturbinen in Gehäusen mit einem Volumen über 260 m³ eingesetzt werden.

Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 14 : Protocole d'essai des systèmes à buses ouvertes pour turbines à combustion situées dans des enceintes de plus de 260 m³

Le présent document spécifie l'évaluation de la performance au feu des systèmes à brouillard d'eau utilisés pour la protection contre l'incendie des turbines à combustion situées dans des enceintes d'un volume supérieur à 260 m³.

Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 14. del: Protokol preskušanja sistemov z odprtimi šobami za požarno zaščito turbin v ohišjih nad 260 m³

General Information

Status
Published
Publication Date
14-Sep-2021
Withdrawal Date
30-Mar-2022
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
15-Sep-2021
Due Date
16-Feb-2022
Completion Date
15-Sep-2021

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SLOVENSKI STANDARD
01-december-2021
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 14. del: Protokol preskušanja
sistemov z odprtimi šobami za požarno zaščito turbin v ohišjih nad 260 m³
Fixed firefighting systems - Water mist systems - Part 14: Test protocol for combustion
turbines in enclosures exceeding 260 m³ for open nozzle systems
Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 14:
Brandversuchsprotokoll für Verbrennungsturbinen in Gehäusen über 260 m³ für offene
Düsensysteme
Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 14 :
Protocole d'essai des systèmes à buses ouvertes pour turbines à combustion situées
dans des enceintes de plus de 260 m³
Ta slovenski standard je istoveten z: EN 14972-14:2021
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14972-14
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2021
EUROPÄISCHE NORM
ICS 13.220.20
English Version
Fixed firefighting systems - Water mist systems - Part 14:
Test protocol for combustion turbines in enclosures
exceeding 260 m³ for open nozzle systems
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen -
à brouillard d'eau - Partie 14 : Protocole d'essai des Wassernebelsysteme - Teil 14: Prüfprotokoll für
systèmes à buses ouvertes pour turbines à combustion Verbrennungsturbinen in Gehäusen über 260 m³ für
situées dans des enceintes de plus de 260 m³ offene Düsensysteme
This European Standard was approved by CEN on 2 August 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14972-14:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 5
5 Test enclosure requirements . 6
6 Combustion turbine mock-up requirements . 8
6.1 Combustion turbine mock-up unit . 8
6.2 Combustion turbine spray cooling mock-up unit . 11
7 Test equipment requirements . 13
8 Instrumentation requirements . 14
9 Fire test requirements . 16
9.1 General . 16
9.2 Low pressure, exposed, diesel spray fire. 16
9.3 Low pressure, angled, diesel spray fire . 16
9.4 Low pressure, concealed, diesel spray fire . 17
9.5 High pressure, exposed, diesel spray fire. 17
9.6 Low pressure-low flow, concealed, diesel spray and pool fires . 18
9.7 Concealed, heptane pool fire . 18
9.8 Flowing fire. 19
9.9 Wood crib and heptane pool fire . 19
9.10 Spray cooling (optional test) . 20
9.11 Saturated insulation mat and spray fire (optional test) . 20
9.12 Saturated insulation mat fire (optional test) . 21
10 Test report . 21

European foreword
This document (EN 14972-14:2021) 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 March 2022, and conflicting national standards shall
be withdrawn at the latest by March 2022.
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 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;
— 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.
NOTE This list includes standards that are in preparation and other standards may be added. For current
status of published standards refer to www.cen.eu.
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.
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 the evaluation of the fire performance for water mist systems used for fire
protection of combustion turbines 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.
EN 14972-1:2020, Fixed firefighting systems — Water mist systems — Part 1: Design, installation,
inspection and maintenance
EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy
structural steels
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14972-1:2020 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 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 or suppressed, as required by the
applicable fire test for their specific applications.
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
(design, installation, operation and maintenance 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 1 min.
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
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 In addition to the fire tests, an optional spray cooling test may be conducted, and the results shall
be analysed by heat transfer calculations to confirm that excessive turbine shell distortion is avoided.
No direct spray impingement onto the turbine casing is allowed in real installations unless otherwise
proven by the heat transfer calculations using the spray cooling test results.
4.7 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 (see Figure 1).
The enclosure area should be preferably squared. If this is not possible length of the 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 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 m by 2 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
...

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