Explosion isolation systems

This document specifies the general requirements for explosion isolation systems. An explosion isolation system is an autonomous protective system which aims to prevent an explosion pressure wave and a flame or only a flame from propagating via connecting pipes or ducts into other parts of apparatus or plant areas.
This document also specifies methods for evaluating the efficacy of the various explosion isolation systems, and methods for evaluating design tools for such explosion isolation systems when applying these in practice.
This document also sets out the criteria for alternative test methods and interpretation means to validate the efficacy of explosion isolation systems.
This document does not cover flame arresters, diverters, and explosion isolation flap valves. For these devices refer to EN ISO 16852:2016 , EN 16020:2011, and EN 16447:2014 respectively.
This standard covers e.g.:
a)   general requirements for the explosion isolation components;
b)   evaluating the efficacy of an explosion isolation system;
c)   evaluating design tools for explosion isolation systems.
This document is applicable only to the use of explosion isolation systems that are intended for avoiding explosion propagation between interconnected enclosures, in which an explosion can result as a consequence of ignition of explosive mixtures, e.g. dust-air mixtures, gas-(vapour-)air mixtures, dust-, gas-(vapour-)air mixtures and mists. It is not applicable to detonation events.

Explosions-Entkopplungssysteme

Dieses Dokument beschreibt die allgemeinen Anforderungen an Explosions-Entkopplungssysteme. Ein Explosions-Entkopplungssystem ist ein autonomes Schutzsystem, das dazu dient, die Ausbreitung einer Explosionsdruckwelle und einer Flamme oder nur einer Flamme über Verbindungsohre oder -kanäle in andere Teile der Apparatur oder Anlagenbereiche zu verhindern.
Dieses Dokument legt darüber hinaus Verfahren zur Bewertung der Wirksamkeit von verschiedenartigen Explosions-Entkopplungssystemen und Verfahren für die Beurteilung von Auslegungshilfen für derartige Explosions-Entkopplungssysteme bei der praktischen Anwendung fest.
Dieses Dokument legt zudem die Kriterien für alternative Prüfverfahren und Interpretationsmittel zur Bestätigung der Wirksamkeit von Explosions-Entkopplungssystemen fest.
Dieses Dokument behandelt keine Flammendurchschlagsicherungen, Explosionsschlote und Explosions-Entkopplungsklappenventile. Für diese Vorrichtungen wird auf EN ISO 16852:2016 , EN 16020:2011 bzw. EN 16447:2014 verwiesen.
Diese Norm behandelt z. B.:
a)   allgemeine Anforderungen an Bauteile zur Explosions-Entkopplung;
b)   Bewertung der Wirksamkeit eines Explosions-Entkopplungssystems;
c)   Bewertung von Auslegungshilfen für Explosions-Entkopplungssysteme.
Dieses Dokument gilt nur für die Anwendung von Explosions-Entkopplungssystemen, die zum Vermeiden einer Explosionsübertragung zwischen miteinander verbundenen Anlagen vorgesehen sind, in denen eine Explosion als Folge einer Entzündung eines explosionsfähigen Gemischs, z. B. Staub/Luft-Gemische, Gas-(Dampf-)Luft-Gemische, Staub-Gas-(Dampf-)Luft-Gemische und Nebel, eintreten kann. Es ist nicht für Detonationsereignisse anwendbar.

Systèmes d’isolation d’explosion

Le présent document décrit les exigences générales relatives aux systèmes d’isolation d’explosion. Un système d’isolation d’explosion est un système de protection autonome qui a pour but d’empêcher une onde de pression d’explosion et une flamme, ou uniquement une flamme, de se propager vers d’autres parties des équipements ou vers d’autres zones de l’installation, par l’intermédiaire de canalisations ou de conduites de raccordement.
Le présent document expose également les méthodes qui permettent d’évaluer l’efficacité des différents systèmes d’isolation d'explosion, ainsi que les méthodes d’évaluation des outils de conception destinés à ces systèmes lors de leur mise en œuvre.
Le présent document expose également les critères requis pour d’autres méthodes d’essai ainsi que des moyens d’interprétation destinés à valider l'efficacité des systèmes d’isolation d’explosion.
Le présent document ne couvre pas les arrête-flammes, les dispositifs déviateurs et les vannes à clapet d’isolation d’explosion. Pour ces dispositifs, se référer respectivement à l’EN ISO 16852:2016 , l’EN 16020:2011 et l’EN 16447:2014.
La présente norme couvre par exemple :
a)   les exigences générales relatives aux composants des systèmes d’isolation d’une explosion ;
b)   l’évaluation de l’efficacité d’un système d’isolation d’explosion ;
c)   l’évaluation des outils de conception destinés à des systèmes d’isolation d’une explosion.
Le présent document est uniquement applicable aux systèmes d’isolation d’explosion qui ont pour but d’éviter une propagation de l’explosion entre des enceintes communicantes dans lesquelles l’explosion résulte de l’inflammation d’une atmosphère explosive, constituée d’un mélange avec l’air de poussière, de gaz-(vapeur), d’un mélange hybride de poussières et de gaz-(vapeur), ou de brouillard. Il ne s’applique pas aux détonations.

Sistemi za ločitev eksplozij

General Information

Status
Not Published
Publication Date
27-Jul-2025
Current Stage
4060 - Closure of enquiry - Enquiry
Start Date
10-Oct-2024
Due Date
29-May-2024
Completion Date
10-Oct-2024

Relations

Effective Date
19-Apr-2023

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SLOVENSKI STANDARD
01-oktober-2024
[Not translated]
Explosion isolation systems
Explosions-Entkopplungssysteme
Systèmes d’isolation d’explosion
Ta slovenski standard je istoveten z: prEN 15089
ICS:
13.230 Varstvo pred eksplozijo Explosion protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2024
ICS 13.230 Will supersede EN 15089:2009
English Version
Explosion isolation systems
Systèmes d'isolement d'explosion Explosions-Entkopplungssysteme
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 305.
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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15089:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements of explosion isolation systems . 8
4.1 General . 8
4.1.1 Types of explosion isolation systems. 8
4.1.2 Explosion protection valve (active or passive) – F&P . 9
4.1.3 Extinguishing barrier (active) – F . 9
4.1.4 Rotary valve (passive) – F&P . 9
4.1.5 Explosion proof interlocked double valve arrangement (passive) – F&P . 9
4.1.6 Diverters, explosion isolation flap valves and flame arresters . 9
4.2 Essential requirements . 9
4.2.1 General . 9
4.2.2 Additional requirements to active systems .10
4.3 Functional safety .12
5 Environmental aspects .13
6 Selection and sizing of explosion isolation systems .13
6.1 General .13
6.2 Additional selection requirements .13
6.2.1 Explosion resistant design for the maximum explosion pressure – mechanical
barriers .13
6.2.2 Venting – isolation .13
6.2.3 Suppression – isolation .14
7 Experimental testing of the efficacy of an explosion isolation system .14
7.1 General .14
7.2 Special gases and dusts .14
7.3 Test Modules .15
7.3.1 General .15
7.3.2 Module B: Explosion resistance testing .16
7.3.3 Module A: Functional testing .17
7.3.4 Module C: Verification of design methods .34
7.4 Test report .36
8 Instructions .37
9 Marking .38
9.1 General .38
9.2 Marking of parts of an explosion isolation system .38
9.3 Marking of the explosion isolation system .40
9.4 Omission of marking .40
Annex A (informative) Example of the validation of a design model .41
Annex B (informative) Verification of design methods . 43
B.1 Design on the basis of an interpretation of test results . 43
B.2 Mathematical model . 44
Annex C (informative) Compilation of parameters influencing the performance of explosion
isolation systems . 48
Annex D (informative) Information on Functional Safety . 54
Annex E (informative) Stopping device for rotary valves . 56
Annex F (informative) Guidance regarding an analysis for the selection of explosion
isolation systems . 57
Annex G (informative) Environmental aspects . 62
G.1 Materials . 62
G.2 Suppressant . 62
G.3 Actuators and other components . 62
Annex H (informative) Significant changes between this document and EN 15089:2009. 63
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/34/EU aimed to be covered . 64
Bibliography . 66
European foreword
This document (prEN 15089:2024) 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 document is currently submitted to the CEN Enquiry.
This document will supersede EN 15089:2009.
The significant changes between this document and EN 15089:2009 are given in Annex H.
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.
1 Scope
This document specifies the general requirements for explosion isolation systems. An explosion isolation
system is an autonomous protective system which aims to prevent an explosion pressure wave and a
flame or only a flame from propagating via connecting pipes or ducts into other parts of apparatus or
plant areas.
This document also specifies methods for evaluating the efficacy of the various explosion isolation
systems, and methods for evaluating design tools for such explosion isolation systems when applying
these in practice.
This document also sets out the criteria for alternative test methods and interpretation means to validate
the efficacy of explosion isolation systems.
This document does not cover flame arresters, diverters, and explosion isolation flap valves. For these
devices refer to EN ISO 16852:2016 , EN 16020:2011, and EN 16447:2014 respectively.
This standard covers e.g.:
a) general requirements for the explosion isolation components;
b) evaluating the efficacy of an explosion isolation system;
c) evaluating design tools for explosion isolation systems.
This document is applicable only to the use of explosion isolation systems that are intended for avoiding
explosion propagation between interconnected enclosures, in which an explosion can result as a
consequence of ignition of explosive mixtures, e.g. dust-air mixtures, gas-(vapour-)air mixtures, dust-,
gas-(vapour-)air mixtures and mists. It is not applicable to detonation events.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1127-1:2019, Explosive atmospheres — Explosion prevention and protection — Part 1: Basic concepts
and methodology
prEN 13237:2022, Potentially explosive atmospheres — Terms and definitions for equipment and
protective systems intended for use in potentially explosive atmospheres
EN 14034-1:2004+A1:2011, Determination of explosion characteristics of dust clouds — Part 1:
Determination of the maximum explosion pressure p of dust clouds
max
EN 14034-2:2006+A1:2011, Determination of explosion characteristics of dust clouds — Part 2:
Determination of the maximum rate of explosion pressure rise (dp/dt) of dust clouds
max
EN 14373:2021, Explosion suppression systems
EN 14460:2018, Explosion resistant equipment
EN 15233:2007, Methodology for functional safety assessment of protective systems for potentially
explosive atmospheres
Will be replaced by EN ISO/IEC 80079-49:2024.
EN 15967:2022, Determination of maximum explosion pressure and the maximum rate of pressure rise of
gases and vapours
EN 16020:2011, Explosion diverters
EN 16447:2014, Explosion isolation flap valves
EN 61508:2010, (all parts) Functional safety of electrical/electronic/programmable electronic safety-
related systems (IEC 61508:2010)
EN ISO 13849-1:2015, Safety of machinery — Safety-related parts of c
...

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