EN 14373:2005

Explosion suppression systems

This European Standard describes the basic requirements for the design and application of explosion suppression systems. This European Standard also specifies a method for evaluating the effectiveness and the scale up of explosion suppression systems against defined explosions. It gives the criteria for alternative test apparatus used to undertake explosion suppression efficacy tests and criteria to be applied in defining the safe operating regime of an explosion suppression system.
It covers:
   general requirements for explosion suppression components;
   evaluating the effectiveness of an explosion suppression system;
   evaluating the scale up of an explosion suppression system;
   evaluation and development of design tools for explosion suppression systems;
   instructions for installation of an explosion suppression system;
   maintenance instructions for an explosion suppression system.
This European Standard is applicable only to explosion suppression systems intended for the protection of closed, or essentially closed, enclosures in which an explosion may result as a consequence of ignition of an explosible mixtures, e.g. dust-air mixtures, gas(vapour)-air mixtures, dust-gas(vapour)-air mixtures and mists.
This European Standard 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.
NOTE   For the listed materials expert advice is required.

Explosions-Unterdrückungssysteme

Diese Europäische Norm beschreibt die Grundanforderungen für die Konstruktion und Anwendung von Explosions-Unterdrückungssystemen. Diese Europäische Norm legt außerdem ein Verfahren zur Beurteilung der Wirksamkeit und Reichweite von Explosions-Unterdrückungssystemen bei bestimmten Explosionen fest. Die Norm gibt Kriterien für alternative Prüfeinrichtungen an, die bei Prüfungen zur Wirksamkeit der Explosions-Unterdrückung gelten, und sie enthält Kriterien, die bei der Festlegung des sicheren Arbeitsbereichs eines Explosions-Unterdrückungssystems anzuwenden sind.
Sie behandelt:
-   allgemeine Anforderungen an Komponenten für Explosions-Unterdrückung;
-   Bewerten des Leistungsvermögens eines Explosions-Unterdrückungssystems;
-   Bewerten der Reichweite eines Explosions-Unterdrückungssystems;
-   Bewertung und Entwicklung einer Konstruktionsanleitung für Explosions-Unterdrückungssysteme;
-   Anweisungen für den Einbau eines Explosions-Unterdrückungssystems;
-   Instandhaltungsanweisungen für ein Explosions-Unterdrückungssystem.
Diese Europäische Norm gilt nur für Explosions-Unterdrückungssysteme, 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-Gemischen, Gas(Dampf)/Luft-Gemischen, Staub/Gas(Dampf)/ Luft-Gemischen und Nebeln, entstehen kann.
Diese Europäische Norm ist nicht anwendbar bei Explosionen von nachstehend aufgeführten Stoffen oder Gemischen, die diese Stoffe enthalten:
-   instabile Stoffe, die möglicherweise zerfallen können;
-   Explosivstoffe;
-   pyrotechnische Materialien;
-   pyrophore Stoffe.
ANMERKUNG   Für die aufgeführten Stoffe ist ein Sachverständigengutachten erforderlich.

Systèmes de suppression d'explosion

La présente Norme européenne décrit les exigences minimales concernant les composants de suppression des explosions pour la conception et l’application des systèmes de suppression des explosions. La présente norme spécifie également une méthode d’évaluation de l’efficacité et de l’extrapolation des systèmes de suppression des explosions par rapport à des explosions définies. Elle fournit les critères des appareillages d’essai alternatifs utilisés pour réaliser des essais d’efficacité de suppression des explosions ainsi que les critères à appliquer pour définir le régime de fonctionnement en toute sécurité d’un système de suppression des explosions.
La présente norme couvre :
-   exigences générales concernant les composants de suppression des explosions ;
-   l'évaluation de l'efficacité d'un système de suppression des explosions ;
-   l'évaluation de l’extrapolation d'un système de suppression des explosions ;
-   évaluation et développement d’outils de conception pour les systèmes de suppression des explosions ;
-   instructions pour l'installation d'un système de suppression des explosions ;
-   instructions concernant la maintenance  d'un système de suppression des explosions.
La présente Norme européenne s'applique uniquement aux systèmes de suppression des explosions destinés à protéger des enveloppes fermées ou notablement fermées, dans lesquelles une explosion peut être la conséquence de l'inflammation de mélanges explosibles, par exemple mélanges poussière-air, mélanges gaz (vapeur)-air, mélanges poussière-gaz (vapeur)-air et brouillards.
La présente norme ne s'applique pas aux explosions des matières énumérées ci-dessous ou aux mélanges contenant certaines de ces matières :
-   matières non stables susceptibles de se dissocier ;
-   matières explosives ;
-   matières pyrotechniques ;
-   matières pyrophoriques.
NOTE   Pour les matières énumérées, l'avis d'un expert est requis.

Sistemi za dušenje eksplozij

General Information

• Status: Withdrawn
• Publication Date: 04-Oct-2005
• Withdrawal Date: 02-Nov-2021
• ICS: 13.230 - Explosion protection
• Technical Committee: CEN/TC 305 - Potentially explosive atmospheres - Explosion prevention and protection
• Drafting Committee: CEN/TC 305/WG 3 - Devices and systems for explosion prevention and protection (provisional title)
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 03-Nov-2021
• Directive: 2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Directive: 94/9/EC - Directive 94/9/EC of the European Parliament and the Council of 23 March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Mandate: M/BC/CEN/92/46 - Standardization mandate assigned to CEN/CENELEC concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Ref Project: SIST EN 14373:2006 - Explosion suppression systems

Relations

• Replaced By: EN 14373:2021 - Explosion suppression systems
• Effective Date: 08-Jun-2022

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Explosion suppression systemsSistemi za dušenje eksplozijSystemes de suppression d'explosionExplosions-Unterdrückungssysteme13.230Varstvo pred eksplozijoExplosion protectionICS:SIST EN 14373:2006enTa slovenski standard je istoveten z:EN 14373:200501-februar-2006SIST EN 14373:2006SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14373October 2005ICS 13.230 English VersionExplosion suppression systemsSystèmes de suppression d'explosionExplosionsunterdrückungs-SystemeThis European Standard was approved by CEN on 16 August 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14373:2005: E

Page Foreword.5 1 Scope.6 2 Normative references.6 3 Terms and definitions.7 4 Explosion suppression.10 4.1 General.10 4.2 Influencing factors.11 4.2.1 General.11 4.2.2 The explosion hazard.11 4.2.3 The explosion suppressant.12 4.2.4 The suppression system.12 4.2.5 Interrelation.12 5 General requirements for explosion suppression components.13 5.1 Detection.13 5.1.1 General.13 5.1.2 Optical detection.13 5.1.3 Pressure detection.13 5.2 Suppressant.13 5.3 HRD-suppressors.14 5.4 Control and Indicating Equipment, CIE.15 6 Requirements for the design of an explosion suppression system.15 6.1 General.15 6.2 Hazard definition.15 6.3 Determination of the pred, max as a function of relevant influencing parameters.16 6.3.1 General.16 6.3.2 Validation by testing in one volume.16 6.3.3 Validation by testing in a second volume.22 6.3.4 Elongated enclosures.22 6.3.5 Pipes.23 6.3.6 Occupied spaces.23 6.4 Validation of system design guidelines.23 6.4.1 General.23 6.4.2 Design nomograph.24 6.4.3 Mathematical model for design.25 6.5 Special applications.26 6.5.1 Suppression combined with venting.26 6.5.2 Venting combined with suppression.27 6.5.3 Suppression combined with reduced oxygen concentrations.27 6.5.4 Partial volumes.27 6.5.5 Segregated volumes.28 6.5.6 Obstructed volumes.28 6.6 Test report.29 7 Safety integrity of explosion suppression systems.30 7.1 General.30 7.2 Measures to avoid and control systematic faults.30 7.3 Control of electric connections.30 7.4 Indicators and messages CIE.30 7.5 Energy supply.31 8 Instructions for installation, commissioning and maintenance.31

Development of nomograph type design guidelines.35 A.1 General.35 A.2 Design nomograph.35 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC of 23 March 1994.39 Bibliography.42 Figures: Figure 1 — Pressure behaviour versus time for a normal and suppressed explosion.11 Figure 2 — Effectiveness of suppressant.14 Figure 3 — Pressure behaviour and pressure rate of pressure rise versus concentration for a normal and suppressed explosion.17 Figure 4 — Maximum reduced explosion pressure, pred, max behaviour versus maximum explosion constant, Kmax.18 Figure 5 — Maximum reduced explosion pressure, pred, max
behaviour versus activation pressure, pa.20 Figure 6 — Maximum reduced explosion pressure, pred, max behaviour versus number of HRD-suppressors, HRDs20 Figure 7 — Maximum reduced explosion pressure, pred, max behaviour versus dispersion agent pressure ps.21 Figure 8 — Design nomograph for a specific explosion suppression system.24 Figure 9 — Calculated maximum reduced explosion overpressure versus measured maximum reduced explosion overpressure for pred, max values up to 0,5 bar.25 Figure 10 — Calculated maximum reduced explosion overpressure versus measured maximum reduced explosion overpressure for pred, max values above 0,5 bar.26 Figure 11 — Example of an enclosure where an explosive concentratio
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