EN 17450-2:2024

SLOVENSKI STANDARD
oSIST prEN 17450-2:2023
01-julij-2023
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 2. del: Zahteve in preskusne
metode za šobe
Fixed firefighting systems - Water mist systems - Part 2: Product characteristics and test
methods for nozzles
Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 2: Anforderungen
und Prüfverfahren für Düsen
Installations fixes de lutte contre l’incendie - Systèmes à brouillard d’eau - Partie 2 :
Caractéristiques de produit et méthodes d’essai pour les diffuseurs
Ta slovenski standard je istoveten z: prEN 17450-2
ICS:
13.220.10 Gašenje požara Fire-fighting
oSIST prEN 17450-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 17450-2:2023
oSIST prEN 17450-2:2023
DRAFT
EUROPEAN STANDARD
prEN 17450-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2023
ICS
English Version
Fixed firefighting systems - Water mist systems - Part 2:
Product characteristics and test methods for nozzles
Ortsfeste Brandbekämpfungsanlagen -
Wassernebelsysteme - Teil 2: Anforderungen und
Prüfverfahren für Düsen
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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17450-2:2023 E
worldwide for CEN national Members.

oSIST prEN 17450-2:2023
prEN 17450-2:2023 (E)
Contents Page
European foreword . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Product characteristics . 7
4.1 General. 7
4.2 Nominal operating temperature for automatic nozzles . 8
4.3 Thermal response of automatic nozzles . 8
4.4 K-factor . 8
4.5 Function of nozzles . 8
4.5.1 Automatic nozzles . 8
4.5.2 Open nozzles . 9
4.6 Strength of nozzle body and deflector . 9
4.6.1 Mechanical strength test . 9
4.6.2 Hydrostatic strength test . 9
4.6.3 Strength of nozzle deflector and its supporting or moving parts . 9
4.7 Strength of release element of automatic nozzles . 9
4.7.1 General. 9
4.7.2 Automatic nozzles using glass-bulbs . 9
4.7.3 Automatic nozzles using fusible links . 9
4.8 Leak resistance . 9
4.9 Heat exposure for automatic nozzles . 9
4.10 Resistance against thermal shock for automatic nozzles. 9
4.11 Resistance against corrosion . 10
4.11.1 Stress corrosion for nozzles with brass parts . 10
4.11.2 Sulphur dioxide corrosion . 10
4.11.3 Salt mist corrosion . 10
4.11.4 Moist air exposure . 10
4.12 Aging test (by heat exposure) for automatic nozzles (optional) . 11
4.13 Resistance against water hammer for automatic nozzles. 11
4.14 Resistance to heat . 11
4.15 Resistance to low temperature for automatic nozzles (optional). 11
4.16 Resistance to vibration . 11
4.17 Resistance to impact . 11
5 Testing, assessment and sampling methods . 11
5.1 General. 11
5.2 Operational tests . 12
5.2.1 Comparison of fire test nozzles with the one used for component testing . 12
5.2.2 Operating temperature of automatic nozzles . 12
5.3 Thermal response tests . 12
5.4 Water flow test . 12
5.5 Function test of nozzles . 12
5.5.1 Function of release element for automatic nozzles . 12
5.5.2 Functional test for open nozzles with blow-off caps . 13
oSIST prEN 17450-2:2023
prEN 17450-2:2023 (E)
5.5.3 Verification functional test . 13
5.6 Strength of nozzle body and deflector tests . 14
5.6.1 Mechanical strength test . 14
5.6.2 Hydrostatic strength test . 14
5.6.3 Strength of nozzle deflector and its supporting or moving parts test . 14
5.7 Strength of release elements test for automatic nozzles . 14
5.7.1 General . 14
5.7.2 Automatic nozzles using glass bulbs . 15
5.7.3 Automatic nozzles using fusible links . 15
5.8 Leak resistance test . 15
5.9 Heat exposure for automatic nozzles . 15
5.10 Thermal shock test . 16
5.11 Corrosion tests . 16
5.11.1 Stress corrosion . 16
5.11.2 Sulphur dioxide corrosion. 16
5.11.3 Salt mist corrosion . 16
5.11.4 Moist air exposure . 16
5.12 Aging test (by heat exposure) for automatic nozzles (optional) . 17
5.13 Water hammer test . 17
5.14 Heat-resistance test . 18
5.15 Low temperature resistance test for automatic nozzles (optional) . 18
5.16 Vibration test . 18
5.17 Resistance to impact test . 19
6 Documentation and marking . 20
6.1 Product documentation . 20
6.2 Marking . 20
7 Test facilities . 21
7.1 Test facility . 21
7.2 Test report . 21
Annex A (normative) Test apparatus for water flow test . 22
A.1 Single inlet pipe nozzle . 22
A.2 Calculation . 22
Annex B (informative) Water distribution test. 24
B.1 Apparatus . 24
B.2 Procedure . 24
Annex C (normative) Corrosion tests . 26
C.1 Stress corrosion test for brass nozzles .
...