EN 17450-2:2024

SLOVENSKI STANDARD
01-december-2024
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: EN 17450-2:2024
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17450-2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2024
EUROPÄISCHE NORM
ICS 13.220.20
English Version
Fixed firefighting systems - Water mist systems - Part 2:
Product characteristics and test methods for nozzles
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen -
à brouillard d'eau - Partie 2 : Caractéristiques de Wassernebelsysteme - Teil 2: Produkteigenschaften
produit et méthodes d'essai pour les diffuseurs und Prüfverfahren für Düsen
This European Standard was approved by CEN on 1 August 2024.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17450-2:2024 E
worldwide for CEN national Members.

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 . 9
4.5.1 Automatic nozzles . 9
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 . 10
4.9 Heat exposure for automatic nozzles using glass bulbs . 10
4.10 Resistance against thermal shock for automatic nozzles using glass bulbs . 10
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 . 11
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 . 12
5.1 General. 12
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
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 using glass bulbs . 15
5.10 Thermal shock test . 16
5.11 Corrosion tests . 16
5.11.1 General . 16
5.11.2 Stress corrosion . 16
5.11.3 Sulphur dioxide corrosion. 16
5.11.4 Salt mist corrosion . 16
5.11.5 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 . 26
C.1.1 Reagents .
...