EN 14373:2021+A1:2025

SLOVENSKI STANDARD
01-maj-2025
Sistemi za dušenje eksplozij
Explosion suppression systems
Explosions-Unterdrückungssysteme
Systèmes de suppression d'explosion
Ta slovenski standard je istoveten z: EN 14373:2021+A1:2025
ICS:
13.230 Varstvo pred eksplozijo Explosion protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14373:2021+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 13.230 Supersedes EN 14373:2021
English Version
Explosion suppression systems
Systèmes de suppression d'explosion Explosions-Unterdrückungssysteme
This European Standard was approved by CEN on 27 September 2021 and includes Amendment 1 approved by CEN on 29
December 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14373:2021+A1:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Symbols and abbreviations (EN 14373) . 9
5 Explosion suppression . 10
5.1 Design . 10
5.2 General function . 10
5.3 Requirements for explosion suppression systems . 11
6 Environmental aspects . 15
6.1 General. 15
6.2 Suppressant . 15
6.3 Actuators and other components . 15
7 Experimental testing of the efficacy of an explosion suppression system . 16
7.1 Information to be submitted prior to testing . 16
7.1.1 General. 16
7.1.2 Intended use . 16
7.1.3 Information on the parts of the suppression system . 16
7.1.4 Calculation model . 17
7.2 Testing . 17
7.2.1 General requirements for test setup . 17
7.2.2 Test program for non metallic dusts . 17
7.2.3 Test program for metal dust . 21
7.2.4 Test program for gas . 21
7.2.5 Test program for hybrid mixtures of non metallic dust and gas . 22
7.2.6 Test program for mist-air mixtures . 22
7.3 Parameters to be measured . 22
7.4 Test report . 23
8 Instructions . 24
8.1 General. 24
8.2 Installation of cables . 24
8.3 Assembling . 25
8.3.1 General. 25
8.3.2 Process information requirements . 25
8.4 Commissioning . 25
8.4.1 General. 25
8.4.2 Instructions for hand-over . 25
8.4.3 Commissioning report . 25
8.5 Safety . 26
8.6 Maintenance . 26
9 Marking and packaging . 26
9.1 General. 26
9.2 Parts of the explosion suppression system . 26
9.3 Explosion suppression system . 28
Annex A (informative) Development of an explosion suppression calculation model . 29
A.1 General . 29
A.2 Extinction. 29
A.3 Functional tests for model development . 30
A.4 Model validation . 31
Annex B (informative) Applications. 32
B.1 General . 32
B.2 Hazard definition . 32
B.3 Typical process equipment . 33
B.3.1 Spray dryers . 33
B.3.1.1 Introduction . 33
B.3.1.2 Definition of elements . 33
B.3.1.3 Dust concentration . 34
B.3.1.4 Protection concept . 35
B.3.1.5 Isolation . 35
B.3.1.6 Advanced inerting . 35
B.3.1.7 Flame Duration . 35
B.3.1.8 Interlocking . 35
B.3.2 Clean volumes . 35
B.3.3 Elevators . 35
B.3.4 Elongated enclosures . 36
B.3.5 Pipes . 36
B.3.6 Occupied spaces . 36
Annex C (informative) Extrapolation to larger volumes . 38
Annex D (informative) Significant changes between this European Standard and
EN 14373:2005 . 42
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of EU Directive 2014/34/EU aimed to be covered . 44
Bibliography . 46
European foreword
This document (EN 14373:2021+A1:2025) has been prepared by Technical Committee CEN/TC 305
“Potentially explosive atmospheres - Explosion prevention and protection”, the secretariat of which is
held by DIN.
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 August 2025, and conflicting national standards shall be
withdrawn at the latest by August 2025.
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.
This document supersedes !EN 14373:2021".
This document includes Amendment 1 approved by CEN on 29 December 2024.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
The significant changes between this document and EN 14373:2005 are given in Annex D.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
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