EN 13237:2024

SLOVENSKI STANDARD
01-september-2022
Potencialno eksplozivne atmosfere - Izrazi in definicije za opremo in zaščitne
sisteme, namenjene za uporabo v potencialno eksplozivnih atmosferah
Potentially explosive atmospheres - Terms and definitions for equipment and protective
systems intended for use in potentially explosive atmospheres
Explosionsgefährdete Bereiche - Begriffe für Geräte und Schutzsysteme zur
Verwendung in explosionsgefährdeten Bereichen
Atmosphères explosibles - Termes et définitions pour les appareils et systèmes de
protection destinés à être utilisés en atmosphères explosibles
Ta slovenski standard je istoveten z: prEN 13237
ICS:
01.040.13 Okolje. Varovanje zdravja. Environment. Health
Varnost (Slovarji) protection. Safety
(Vocabularies)
01.040.29 Elektrotehnika (Slovarji) Electrical engineering
(Vocabularies)
13.230 Varstvo pred eksplozijo Explosion protection
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 13237
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2022
ICS 01.040.13; 01.040.29; 13.230; 29.260.20 Will supersede EN 13237:2012
English Version
Potentially explosive atmospheres - Terms and definitions
for equipment and protective systems intended for use in
potentially explosive atmospheres
Atmosphères explosibles - Termes et définitions pour Explosionsgefährdete Bereiche - Begriffe für Geräte
les appareils et systèmes de protection destinés à être und Schutzsysteme zur Verwendung in
utilisés en atmosphères explosibles explosionsgefährdeten Bereichen
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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13237:2022 E
worldwide for CEN national Members.

prEN 13237:2022 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
Annex A (informative) Definitions from the Directive 2014/34/EU and corrigenda . 27
Annex B (informative) Significant changes between this document and EN 13237:2012 . 30
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/34/EU aimed to be covered . 31
Bibliography . 32

prEN 13237:2022 (E)
European foreword
This document (prEN 13237:2022) 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 13237:2012.
The significant changes between this document and EN 13237:2012 are given in Annex B.
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
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
prEN 13237:2022 (E)
Introduction
This European Standard has been produced to assist designers, manufacturers and other interested
parties to use harmonized terms and definitions (vocabulary) for equipment and protective systems
intended for use in potentially explosive atmospheres. It describes the vocabulary to be used to give all
standards in this area an overall uniformity of terminology. Throughout this European Standard, the only
hazard considered is the explosion of an explosive atmosphere.
prEN 13237:2022 (E)
1 Scope
This document specifies terms and definitions (vocabulary) to be used in suitable standards dealing with
equipment and protective systems intended for use in potentially explosive atmospheres.
NOTE Directive 2014/34/EU concerning equipment and protective systems intended for use in potentially
explosive atmospheres can be applicable to the type of machine or equipment covered by this document. This
document is not intended to provide means of complying with the essential health and safety requirements of
Directive 2014/34/EU.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
air flow velocity
3 2
volume of air [m ] which flows through a defined surface [m ] per unit time [s]
[SOURCE: EN 17077:2018, 3.1]
3.2
ambient atmosphere
normal atmosphere surrounding the equipment and protective system
3.3
ambient temperature
temperature of the air or other medium where the equipment and protective system is to be used
3.4
atmospheric conditions
conditions with pressures ranging from 80 kPa to 110 kPa (0,8 bar to 1,1 bar); temperatures ranging
from −20°C to +60°C
[SOURCE: EN ISO 16852:2016, 3.25]
prEN 13237:2022 (E)
3.5
combustible dust
finely divided solid particles, 500 µm or less in nominal size, which may form explosive mixtures with air
at standard atmospheric pressure and temperatures
Note 1 to entry: This includes dust and grit as defined in ISO 4225:2020.
Note 2 to entry: The term “solid particles” is intended to address particles in the solid phase but does not preclude
a hollow particle.
[SOURCE: EN ISO/IEC 80079-20-2:2016 , modified — reference date in Note 1 to entry has been
updated]
3.5.1
conductive dust
combustible metal dusts and other combustible dusts with electrical resistivity equal to or less than
1 × 103 Ω m
Note 1 to entry: Metal dust is treated as conductive dust because it is assumed that surface oxidation cannot be
depended upon to always ensure electrical resistivity greater than 1 × 103 Ω m
[SOURCE: EN ISO/IEC 80079-20-2:2016 ]
3.5.2
non-conductive dust
combustible dust with electrical resistivity greater than 1 × 103 Ω m
]
[SOURCE: EN ISO/IEC 80079-20-2:2016
3.6
combustible flyings
solid particles, including fibres, where one dimension is greater than 500 μm in nominal size, which may
form an explosive mixture with air at standard atmospheric pressure and temperature
Note 1 to entry: The ratio of length to width is 3 or more.
Note 2 to entry: Examples of flyings include carbon fibre, rayon, cotton (including cotton linters and cotton
waste), sisal, jute, hemp, cocoa fibre, oakum and baled waste kapok.
[SOURCE: EN ISO/IEC 80079-20-2:2016 ]
3.7
constructional safety “c”
ignition protection where constructional measures are applied so as to protect against the possibility of
ignition from hot surfaces, sparks and adiabatic compression generated by moving parts
[SOURCE: EN ISO 80079-37:2016, 3.1]

As impacted by EN ISO/IEC 80079-20-2:2016/AC:2017.
prEN 13237:2022 (E)
3.8
control of ignition source “b”
ignition protection where mechanical or electrical devices are used in conjunction with nonelectrical
equipment to manually or automatically reduce the likelihood of a potential ignition source from
becoming an effective ignition source
Note 1 to entry: This might for example be a level sensor used to indicate loss of oil, a temperature sensor to
indicate a hot bearing or a speed sensor to indicate over-speed.
[SOURCE: EN ISO 80079-37:2016, 3.3]
3.9
control measure
3.9.1
automatic control measure
action taken without manual intervention, to reduce the likelihood of a potential ignition source from
becoming an effective ignition source
[SOURCE: EN ISO 80079-37:2016, 3.3.1]
3.9.2
manual control measure
action taken by a person as a result of a warning, indication, or alarm, to reduce the likelihood of a
potential ignition source from becoming an effective ignition source
[SOURCE: EN ISO 80079-37:2016, 3.3.2]
3.10
ignition prevention devices/systems
arrangement that converts signals from one or more sensors into an action, or indication, to reduce the
likelihood of a potential ignition source from becoming an effective ignition source
[SOURCE: EN ISO 80079-37:2016, 3.3.3]
3.11
safety devices
devices intended for use inside or outside explosive atmospheres but required for or contributing to the
safe functioning of equipment and protective systems with respect to the risks of explosion
[SOURCE: EN ISO 80079-37:2016, 3.3.4]
3.12
continuous grade of release
release which is continuous or is expected to occur frequently or for long periods
[SOURCE: EN IEC 60079-10-1:2021, 3.4.2]
3.13
deflagration
explosion propagating at subsonic velocity
[SOURCE: ISO 8421-1:1987]
prEN 13237:2022 (E)
3.14
degree of protection
extent of protection provided by an enclosure against access to hazardous parts, against ingress of solid
foreign objects and/or ingress of water and verified by standardised test methods
Note 1 to entry: The enclosure which provides the degree of protection IP is not necessarily identical with the
types of protection as defined in EN IEC 60079-0.
[SOURCE: EN 60529:1991 , 3.3]
3.15
detonation
explosion propagating at supersonic velocity and characterised by a shock wave
[SOURCE: ISO 8421-1:1987]
3.16
dust
small solid particles in the atmosphere which settle out under their own weight, but which may remain
suspended in air for some time
Note 1 to entry: Generally combustible dusts with a median value below 500 µm may form explosible dust/air-
mixtures.
[SOURCE: EN 14034-1:2004+A1:2011, 3.1, modified — definition has been changed]
3.17
electrical equipment
items applied as a whole or in part for the utilisation of electrical energy
Note 1 to entry: These include, among others, items for the generation, transmission, distribution, storage,
measurement, regulation, conversion and consumption of electrical energy and items for telecommunications.
[SOURCE: EN IEC 60079-0:2018 , 3.14]
3.18
electrostatic leakage resistance
electrical resistance measured between an object and earth
[SOURCE: EN 14983:2007, 3.1]
3.19
enclosure (of equipment or protective system)
all the walls including doors, covers, cable entries, rods, spindles and shafts which contribute to the type
of protection and/or their degree of protection (IP)

As impacted by EN 60529:1991/A1:2000, EN 60529:1991/A2:2013, EN 60529:1991/AC:2016-12 and
EN 60529:1991/corrigendum May 1993.
As impacted by EN IEC 60079-0:2018/AC:2020-02.
prEN 13237:2022 (E)
3.20
equipment grouping
classification system of equipment related to the explosive atmosphere for which they are intended to be
used
Note 1 to entry: EN IEC 60079-0 identifies three equipment groups:
Group I − equipment for mines susceptible to fire damp;
Group II, which is sub-divided into groups IIA, IIB and IIC − equipment for all places with an explosive gas
atmosphere other than mines susceptible to fire damp;
Group III, which is sub-divided into groups IIIA, IIIB and IIIC − equipment for all places with an explosive dust
atmosphere other than mines susceptible to fire damp.
[SOURCE: EN ISO 80079-36:2016 ]
3.21
Ex Component
part of Ex Equipment or a module, marked with the symbol “U”, which is not intended to be used alone
and requires additional consideration when incorporated into Ex Equipme
...