EN 61241-10:2004

Electrical apparatus for use in the presence of combustible dust - Part 10: Classification of areas where combustible dusts are or may be present

Deals with the classification of areas where explosive dust/air mixtures and combustible dust layers are present, in order to permit the proper selection of equipment for use in such areas. The principles of the standard can also be followed when combustible fibres or flyings may cause a hazard. To be applied where there can be a risk due to the presence of explosive dust/air mixtures or combustible dust layers under normal atmospheric conditions.

Elektrische Betriebsmittel zur Verwendung in Bereichen mit brennbarem Staub - Teil 10: Einteilung von staubexplosionsgefährdeten Bereichen

Matériels électriques pour utilisation en présence de poussières combustibles - Partie 10: Classification des emplacements où des poussières combustibles sont ou peuvent être présentes

Traite de la classification des emplacements où des mélanges poussières/air explosifs et des couches de poussières combustibles sont présents, pour permettre une sélection appropriée du matériel destiné à être utilisé dans de tels emplacements. Les principes de cette norme peuvent également être suivis lorsque des fibres ou particules volatiles et combustibles sont source de danger. Applicable lorsqu'il y a danger dû à la présence de mélanges poussières/air explosifs ou de couches de poussières combustibles dans des conditions atmosphériques normales.

Električne naprave za uporabo v prisotnosti gorljivega prahu - 10. del: Razdelitev prostorov, v katerih je lahko prisoten gorljiv prah (IEC 61241-10:2004)

General Information

• Status: Withdrawn
• Publication Date: 21-Jul-2004
• Withdrawal Date: 30-Jun-2007
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: CLC/TC 31 - Electrical apparatus for explosive atmospheres - General requirements
• Drafting Committee: IEC/TC 31 - Electrical apparatus for potentially explosive atmospheres
• Parallel Committee: IEC/SC 31H - IEC_SC_31H
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-Jun-2012
• Completion Date: 01-Jun-2012
• Ref Project: SIST EN 61241-10:2005 - Electrical apparatus for use in the presence of combustible dust -- Part 10: Classification of areas where combustible dusts are or may be present

Relations

• Replaces: EN 50281-3:2002 - Equipment for use in the presence of combustible dust - Part 3: Classification of areas where combustible dusts are or may be present
• Effective Date: 29-Jan-2023
• Replaced By: EN 60079-10-2:2009 - Explosive atmospheres - Part 10-2: Classification of areas - Combustible dust atmospheres
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
1DGRPHãþD
SIST EN 50281-3:2003
(OHNWULþQHQDSUDYH]DXSRUDERYSULVRWQRVWLJRUOMLYHJDSUDKXGHO5D]GHOLWHY
SURVWRURYYNDWHULKMHODKNRSULVRWHQJRUOMLYSUDK,(&
Electrical apparatus for use in the presence of combustible dust - Part 10: Classification
of areas where combustible dusts are or may be present
Elektrische Betriebsmittel zur Verwendung in Bereichen mit brennbarem Staub - Teil 10:
Einteilung von staubexplosionsgefährdeten Bereichen
Matériels électriques pour utilisation en présence de poussières combustibles - Partie
10: Classification des emplacements où des poussières combustibles sont ou peuvent
être présentes
Ta slovenski standard je istoveten z: EN 61241-10:2004
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61241-10
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2004
ICS 29.260.20 Supersedes EN 50281-3:2002

English version
Electrical apparatus for use in the presence of combustible dust
Part 10: Classification of areas
where combustible dusts are or may be present
(IEC 61241-10:2004)
Matériels électriques pour utilisation  Elektrische Betriebsmittel zur Verwendung
en présence de poussières combustibles in Bereichen mit brennbarem Staub
Partie 10: Classification des emplacements Teil 10: Einteilung von
où des poussières combustibles staubexplosionsgefährdeten Bereichen
sont ou peuvent être présentes (IEC 61241-10:2004)
(CEI 61241-10:2004)
This European Standard was approved by CENELEC on 2004-07-01. CENELEC 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 Central Secretariat or to any CENELEC member.

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 CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61241-10:2004 E
Foreword
The text of document 31H/172/FDIS, future edition 1 of IEC 61241-10, prepared by SC 31H,
Apparatus for use in the presence of combustible dust, of IEC TC 31, Electrical apparatus for
explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 61241-10 on 2004-07-01.
This European Standard supersedes EN 50281-3:2002.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2005-04-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2007-07-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61241-10 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61241-10:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application 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.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1)
IEC 61241-0 - Electrical apparatus for use in the - -
presence of combustible dust
Part 0: General requirements
1)
IEC 61241-14 - Part 14: Selection and installation - -

1)
Undated reference.
NORME CEI
INTERNATIONALE
IEC
61241-10
INTERNATIONAL
Première édition
STANDARD
First edition
2004-06
Matériels électriques pour utilisation
en présence de poussières combustibles –
Partie 10:
Classification des emplacements
où des poussières combustibles sont
ou peuvent être présentes
Electrical apparatus for use in the
presence of combustible dust –
Part 10:
Classification of areas where combustible
dusts are or may be present
 IEC 2004 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
CODE PRIX
U
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61241-10  IEC:2004 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.11

1 Scope.13
2 Normative references .15
3 Terms and definitions .15
4 Area classification for combustible dusts .19
4.1 General .19
4.2 Area classification objectives for explosive dust atmospheres .19
4.3 Area classification procedure for explosive dust atmospheres .21
5 Sources of release for explosive dust atmospheres .21
5.1 General .21
5.2 Identification of sources of release .23
6 Zones for explosive dust atmospheres.25
6.1 General .25
6.2 Zones for dusts .25
6.3 Examples of zones for explosive dust atmospheres.25
6.4 Extent of zones for explosive dust atmospheres .27
7 Dust layer hazard .31
8 Documentation .31
8.1 General .31
8.2 Drawings, data sheets and tables.31

Annex A (informative) Area classification application .35
Annex B (informative) Risk of fire from hot surface ignition of dust layer .43
Annex C (informative) Housekeeping .49

Bibliography.53

Figure 1 – Identification of zones on drawings .33
Figure A.1 – Bag emptying station within a building and without exhaust ventilation .35
Figure A.2 – Bag emptying station with exhaust ventilation .37
Figure A.3 – Cyclone and filter with clean outlet outside building .39
Figure A.4 – Drum tipper within a building without exhaust ventilation.41
Figure B.1 – Risk of fire from hot surface ignition of dust layer .43
Figure B.2 – Reduction in the maximum permissible surface temperature marking on
apparatus for increasing depth of dust layers .45

Table 1 – Designation of zones depending on presence of combustible dust .25

61241-10  IEC:2004 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ELECTRICAL APPARATUS FOR USE IN THE
PRESENCE OF COMBUSTIBLE DUST –

Part 10: Classification of areas where combustible dusts
are or may be present
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61241-10 has been prepared by subcommittee 31H: Apparatus for
use in the presence of combustible dust, of IEC technical committee 31: Electrical apparatus
for explosive atmospheres.
This first edition of IEC 61241-10 cancels and replaces IEC 61241-3, published in 1997, and
constitutes a major technical revision.
The main changes with respect to IEC 61241-3 are listed below:
a) definitions of zones have changed;
b) layers are no longer restricted to zone 20. Consideration of layers as a source of a dust
cloud has been introduced.
---------------------- Pag
...