CEN/TR 16793:2016

Guide for the selection, application and use of flame arresters

This Technical Report is aimed primarily at persons who are responsible for the safe design and operation of installations and equipment using flammable liquids, vapours or gases.
This document applies to both industrial and mining applications
This document describes possible risks and gives proposals for the protection against these risks by the use of flame arresters.
This document gives some guidance to choice of flame arresters according to EN ISO 16852 for different common scenarios and it gives best practice for the installation and maintenance of these flame arresters.

Richtlinie für die Auswahl, die Anwendung und den Einsatz von Flammendurchschlagssicherungen

Dieser Technische Bericht ist vorrangig für Personen bestimmt, die für die sichere Ausführung und den sicheren Betrieb von Installationen und Anlagen verantwortlich sind, in denen brennbare Flüssigkeiten, Dämpfe oder Gase verwendet werden.
Dieses Dokument gilt sowohl für Industrieanwendungen als auch für Anwendungen im Bergbau.
In diesem Dokument sind mögliche Risiken beschrieben sowie Vorschläge für den Schutz gegen diese Risiken durch den Einsatz von Flammendurchschlagsicherungen enthalten.
Dieses Dokument enthält  Richtlinien für die Auswahl von Flammendurchschlagsicherungen entsprechend EN ISO 16852 für verschiedene übliche Szenarien und bewährte Vorgehensweisen für den Einbau und die Instandhaltung dieser Flammendurchschlagsicherungen.

Guide pour la sélection, l'application et l'utilisation des arrête-flammes

Le présent Rapport Technique s'adresse principalement aux personnes responsables de la conception et de l'exploitation en toute sécurité d'installations et d'équipements utilisant de liquides, de vapeurs et de gaz inflammables.
Le présent document concerne à la fois les applications industrielles et les applications minières.
Le présent document décrit les risques éventuels et propose des solutions pour la protection contre ces risques à l’aide d’arrête-flammes.
Le présent document fournit des conseils concernant le choix d'arrête-flammes conformes à l'EN ISO 16852 pour différents scénarios courants et indique les bonnes pratiques pour l'installation et la maintenance des arrête-flammes.

Smernice za izbiro in uporabo plamenskih zapor

To tehnično poročilo je namenjeno zlasti osebam, odgovornim za varno oblikovanje ter upravljanje inštalacij in opreme z vnetljivimi tekočinami, hlapi ali plini.
Ta dokument se uporablja tako v industriji kot rudarstvu.
V tem dokumentu so opisana možna tveganja ter podani predlogi za zaščito pred temi tveganji z uporabo plamenskih zapor.
V tem dokumentu je navedenih nekaj smernic za izbiro plamenskih zapor skladno s standardom EN ISO 16852 za različne običajne scenarije, poleg tega pa v njem najdete tudi informacije o najboljši praksi za namestitev in vzdrževanje teh plamenskih zapor.

General Information

• Status: Published
• Publication Date: 12-Jan-2016
• ICS: 13.220.99 - Other standards related to protection against fire
• ICS: 23.060.40 - Pressure regulators
• Technical Committee: CEN/TC 305 - Potentially explosive atmospheres - Explosion prevention and protection
• Drafting Committee: CEN/TC 305/WG 6 - Flame arresters
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 13-Jan-2016
• Due Date: 20-Mar-2016
• Completion Date: 13-Jan-2016
• 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-TP CEN/TR 16793:2016 - Guide for the selection, application and use of flame arresters

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2016
Smernice za izbiro in uporabo plamenskih zapor
Guide for the selection, application and use of flame arresters
Richtlinie für die Auswahl, die Anwendung und den Einsatz von
Flammendurchschlagssicherungen
Guide pour la sélection, l'application et l'utilisation des arrête-flammes
Ta slovenski standard je istoveten z: CEN/TR 16793:2016
ICS:
13.220.99 Drugi standardi v zvezi z Other standards related to
varstvom pred požarom protection against fire
23.060.40 7ODþQLUHJXODWRUML Pressure regulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 16793
TECHNICAL REPORT
RAPPORT TECHNIQUE
January 2016
TECHNISCHER BERICHT
ICS 23.060.40; 13.220.99
English Version
Guide for the selection, application and use of flame
arresters
Guide pour la sélection, l'application et l'utilisation des Richtlinie für die Auswahl, die Anwendung und den
arrête-flammes Einsatz von Flammendurchschlagssicherungen

This Technical Report was approved by CEN on 22 December 2014. It has been drawn up by the Technical Committee CEN/TC
305.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16793:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 8
4 Explosion risks . 9
5 Technical measures for explosion protection . 11
5.1 General . 11
5.2 Mitigation of the effects of explosion . 11
5.2.1 General . 11
5.2.2 Prevention of explosion propagation – explosion decoupling . 11
5.3 Safety concept . 11
6 Flame arresters . 13
6.1 General . 13
6.2 Principle of operation of flame arresters . 14
6.3 Types of flame arresters . 15
6.3.1 End-of-line deflagration flame arrester . 15
6.3.2 In-line deflagration flame arrester . 15
6.3.3 In-line detonation flame arrester . 15
6.3.4 Stabilized burning . 15
6.3.5 Pre-volume flame arresters . 16
6.4 Selection of flame arresters . 16
6.5 Application limits . 20
6.6 Installation limits . 21
6.6.1 General . 21
6.6.2 Arrangement of flame arresters at pipe branches [5] . 22
6.6.3 In-line deflagration flame arrester . 23
6.6.4 End-of-line deflagration flame arrester . 24
6.6.5 Liquid seal flame arrester . 25
6.6.6 Foot valve flame arrester . 26
6.6.7 Hydraulic flame arrester . 26
6.6.8 High velocity valves . 26
6.7 Insulation and heating . 26
7 Application of flame arresters . 27
7.1 General . 27
7.2 Protection of process units, containments and tanks [5] . 27
7.2.1 Necessity of flame arresters . 27
7.2.2 Protection against flame transmission during deflagration or detonation . 27
7.2.3 Protection against flame transmission during endurance burning . 28
7.2.4 Operating conditions [5] . 29
7.3 Changing the process . 29
8 Installation, operating and maintenance . 29
8.1 General . 29
8.2 Safety information . 30
8.3 Checking and installing . 30
8.4 Inspection and maintenance intervals . 31
8.5 Liquid seal flame arrester . 31
9 Commissioning checklist . 32
Bibliography . 33

European foreword
This document (CEN/TR 16793:2016) 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 has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
Introduction
The document provided is general in nature and for specific applications further expert advice should
be sought.
In addition to the content of operating manuals from manufacturers, the local accident prevention
regulations, environmental protection and general safety provisions for the devices’ area of use, as well
as relevant laws and national directives, this paper will support the user for a proper use of flame
arresters.
In Europe, the “Directive 2014/34/EU on equipment and protective systems intended for use in
potentially explosive atmospheres” (ATEX – Atmosphères Explosibles) is mandatory for the production
and test intended for use of products in potentially explosive atmospheres. Flame arresters are defined
as a Protective System.
Flame arresters should be tested according to EN ISO 16852, Flame arresters – Performance
requirements, test methods and limits for use, to fulfill the health and safety requirements of this
directive.
Flame arresters are subjected to an EC type examination and are designed for use in areas at risk from
explosion.
The Directive 1999/92/EC of the European Parliament and of the Council of 16 December 1999 on
minimum requirements for improving the safety and health protection of workers potentially at risk
from explosive atmospheres - gives the minimum requirements for the improvement of health
protection and safety of employers who could be endangered by explosive atmospheres. The main
issues are assessment of explosion risk, zone classification and the explosion protection documents
(including requirements for personnel to do engineering, equipment selection, installation,
maintenance, repair, etc.).
National regulations and/or codes relating to specific industries or applications may exist which have to
followed.
Flame arresters are required to protect against many types of explosion events within equipment.
The safety obtained depends heavily upon correct choice, installation and maintenance of the flame
arrester. This cannot be achieved without responsible, informed management.
1 Scope
This Technical Report is aimed primarily at persons who are responsible for the safe design and
operation of installations and equipment using flammable liquids, vapours or gases.
This document applies to both industrial and mining applications
This document describes possible risks and gives proposals for the protection against these risks by the
use of flame arresters.
This document gives some guidance to choice of flame arresters according to EN ISO 16852 for different
common scenarios and it gives best practice for the installation and maintenance of these flame
arresters.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 60079-20-1, Explosive atmospheres — Part 20-1: Material characteristics for gas and vapour
classification — Test methods and data (IEC 60079-20-1)
EN ISO 16852:2010, Flame arresters — Performance requirements, test methods and limits for use (ISO
16852:2008, including Cor 1:2008 and Cor 2:2009)
EN ISO 28300:2008, Petroleum, petrochemical and natural gas industries — Venting of atmospheric and
low-pressure storage tanks (ISO 28300:2008)
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
atmospheric condition
pressure ranging from 80 kPa to 110 kPa (0,8 bar to 1,1 bar); temperatures ranging from -20 °C to
+60 °C
3.1.2
end-of-line fl
...