Explosion suppression systems

This document describes the basic requirements for the design and application of explosion suppression systems. This document also specifies test methods for evaluating the effectiveness and the scaling up of explosion suppression systems against defined explosions. This document covers:
-   general requirements for explosion suppression system parts;
-   evaluating the effectiveness of an explosion suppression system;
-   evaluating the scale up of an explosion suppression system to larger than tested volumes;
-   development and evaluation of design tools for explosion suppression systems;
-   installation, operation and maintenance instructions for an explosion suppression system.
This document is applicable only to explosion suppression systems intended for the protection of closed, or essentially closed, enclosures in which an explosion could result as a consequence of ignition of an explosible mixture, e.g. dust-air, gas(vapour)-air, dust-gas(vapour)-air and mist-air.
This document is not applicable for explosions of materials listed below, or for mixtures containing some of those materials:
-   unstable materials that are liable to dissociate;
-   explosive materials;
-   pyrotechnic materials;
-   pyrophoric materials.


Dieses Dokument beschreibt die Grundanforderungen für die Konstruktion und Anwendung von Explosions-Unterdrückungssystemen. Dieses Dokument legt außerdem Prüfverfahren zur Beurteilung der Wirksamkeit und Skalierung von Explosions-Unterdrückungssystemen bei bestimmten Explosionen fest. Dieses Dokument behandelt:
- allgemeine Anforderungen an Bauteile für Explosions-Unterdrückungssysteme;
- Bewerten des Wirksamkeit eines Explosions-Unterdrückungssystems;
- Bewerten der Extrapolation eines Explosions-Unterdrückungssystems über das geprüfte Volumen hinaus;
- Entwicklung und Bewertung von Auslegungsverfahren für Explosions-Unterdrückungssysteme;
- Einbau-, Betriebs- und Instandhaltungsanleitungen für ein Explosions-Unterdrückungssystem.
Dieses Dokument ist nur für Explosions-Unterdrückungssysteme anzuwenden, die zum Schutz von geschlossenen oder im Wesentlichen geschlossenen Gehäusen vorgesehen sind, in denen eine Explosion durch die Zündung eines explosionsfähigen Gemisches, z. B. Staub/Luft, Gas(Dampf)/Luft, Staub/Gas(Dampf)/Luft und Nebel/Luft, entstehen könnte.
Dieses Dokument ist nicht anwendbar für Explosionen von nachstehend aufgeführten Stoffen oder Gemischen, die diese Stoffe enthalten:
- instabile Stoffe, die möglicherweise zerfallen können;
- Explosivstoffe;
- pyrotechnische Materialien;
- pyrophore Stoffe.

Systèmes de suppression d’explosion

Le présent document décrit les exigences minimales de conception et d’application des systèmes de suppression d’explosion. Il spécifie également des méthodes d’essai pour l’évaluation de l’efficacité et de l’extrapolation des systèmes de suppression d’explosion par rapport à des explosions définies. Le présent document couvre les points suivants :
-   les exigences générales relatives aux éléments des systèmes de suppression d’explosion ;
-   l’évaluation de l’efficacité d’un système de suppression d’explosion ;
-   l’évaluation de l’extrapolation d’un système de suppression d’explosion à des volumes supérieurs à ceux soumis à essai ;
-   le développement et l’évaluation d’outils de conception pour les systèmes de suppression d’explosion ;
-   des instructions relatives à l’installation, au fonctionnement et à la maintenance d’un système de suppression d’explosion.
Le présent document s’applique uniquement aux systèmes de suppression d’explosion destinés à protéger des enveloppes fermées ou en majeure partie fermées, dans lesquelles une explosion peut être la conséquence de l’inflammation de mélanges explosibles de type poussière-air, gaz (vapeur)-air, poussière-gaz (vapeur)-air et brouillard-air, par exemple.
Le présent document ne s’applique pas aux explosions des matières énumérées ci-dessous ni aux mélanges contenant certaines de ces matières :
-   matières non stables susceptibles de se dissocier ;
-   matières explosives ;
-   matières pyrotechniques ;
-   matières pyrophoriques.

Sistemi za dušenje eksplozij

Ta dokument opisuje osnovne zahteve za projektiranje in uporabo sistemov za dušenje eksplozij. Ta dokument določa tudi preskusne metode za vrednotenje učinkovitosti in nadgradnje sistemov za dušenje eksplozij v primerih navedenih eksplozij. Ta dokument obravnava:
– splošne zahteve za komponente sistemov za dušenje eksplozij;
– vrednotenje učinkovitosti sistema za dušenje eksplozij;
– vrednotenje nadgradnje sistema za dušenje eksplozij;
– razvoj in vrednotenje orodij za projektiranje sistemov za dušenje eksplozij;
– navodila za namestitev, delovanje in vzdrževanje sistema za dušenje eksplozij.
Ta dokument se uporablja samo za sisteme za dušenje eksplozij, namenjene za zaščito zaprtih oziroma v osnovi zaprtih prostorov, v katerih bi lahko prišlo do eksplozije zaradi vžiga eksplozivne mešanice, npr. prah-zrak, plin (hlapi)-zrak, prah-plin (hlapi)-zrak in meglica-zrak.
Ta dokument se ne uporablja za eksplozije spodaj navedenih snovi ali za mešanice, ki vsebujejo nekatere od teh snovi:
– nestabilne snovi, ki se lahko ločijo;
– eksplozivne snovi;
– pirotehnične snovi;
– piroforne snovi.

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Standards Content (Sample)

SIST EN 14373:2006
Sistemi za dušenje eksplozij
Explosion suppression systems
Systèmes de suppression d’explosion
Ta slovenski standard je istoveten z: EN 14373:2021
13.230 Varstvo pred eksplozijo Explosion protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14373
November 2021
ICS 13.230 Supersedes EN 14373:2005
English Version
Explosion suppression systems
Systèmes de suppression d'explosion Explosions-Unterdrückungssysteme
This European Standard was approved by CEN on 27 September 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
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.


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 14373:2021 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) . 8
5 Explosion suppression . 9
5.1 Design . 9
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 . 15
7.1 Information to be submitted prior to testing . 15
7.1.1 General. 15
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) 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 May 2022, and conflicting national standards shall be
withdrawn at the latest by November 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.
This document supersedes EN 14373:2005.
The significant changes between this document and EN 14373:2005 are given in Annex D.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
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, Es

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