oSIST prEN IEC 60079-10-2:2025

Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres

Explosionsgefährdete Bereiche - Teil 10-2: Einteilung der Bereiche - Staubexplosionsgefährdete Bereiche

Atmosphères explosives - Partie 10-2: Classement des emplacements - Atmosphères explosives poussiéreuses

Eksplozivne atmosfere - 10-2. del: Razvrstitev prostorov - Eksplozivne prašne atmosfere

General Information

• Status: Not Published
• Public Enquiry End Date: 29-May-2025
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: EXP - Product for explosive atmospheres
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 11-Mar-2025
• Due Date: 29-Jul-2025
• Ref Project: prEN IEC 60079-10-2:2025 - Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres

Relations

• Revises: SIST EN 60079-10-2:2015 - Explosive atmospheres -- Part 10-2: Classification of areas - Combustible dust atmospheres (IEC 60079-10-2:2015)
• Effective Date: 12-Dec-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2025
Eksplozivne atmosfere - 10-2. del: Razvrstitev prostorov - Eksplozivne prašne
atmosfere
Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres
Explosionsgefährdete Bereiche - Teil 10-2: Einteilung der Bereiche -
Staubexplosionsgefährdete Bereiche
Atmosphères explosives - Partie 10-2: Classement des emplacements - Atmosphères
explosives poussiéreuses
Ta slovenski standard je istoveten z: prEN IEC 60079-10-2:2025
ICS:
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.

31J/383/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-10-2 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-03-07 2025-05-30
SUPERSEDES DOCUMENTS:
31J/355/CD, 31J/364A/CC
IEC SC 31J : CLASSIFICATION OF HAZARDOUS AREAS AND INSTALLATION REQUIREMENTS
SECRETARIAT: SECRETARY:
Croatia Mr Marino Kelava
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 18
ASPECTS CONCERNED:
Environment,Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
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to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC
clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres

PROPOSED STABILITY DATE: 2031
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
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31J/383/CDV 2 IEC 60079-10-2 ED3 © IEC 2025
1 CONTENTS
3 FOREWORD . 4
4 INTRODUCTION . 8
5 1 Scope . 9
6 2 Normative references . 9
7 3 Terms and definitions . 10
8 4 Area classification . 14
9 4.1 General . 14
10 4.1.1 Basic considerations . 14
11 4.1.2 Small quantities . 15
12 4.1.3 Negligible extent . 15
13 4.1.4 Inerting . 15
14 4.2 Safety principles . 16
15 4.3 Area classification objectives . 16
16 4.4 Interior of process equipment . 17
17 4.5 Management of change . 17
18 4.6 Commissioning and maintenance activities . 17
19 4.7 Catastrophic failures . 17
20 4.8 Competence of personnel . 18
21 4.9 Area classification procedure for explosive dust atmospheres . 18
22 5 Sources of release . 19
23 5.1 General . 19
24 5.2 Dust containment . 19
25 5.3 Identification and grading of sources of release . 20
26 6 Zones . 20
27 6.1 General . 20
28 6.2 Extent of zones . 20
29 6.2.1 General . 20
30 6.2.2 Zone 20 . 21
31 6.2.3 Zone 21 . 21
32 6.2.4 Zone 22 . 21
33 6.2.5 Zone dependence on grade of release . 21
34 7 Dust layers . 22
35 8 Documentation . 22
36 8.1 General . 22
37 8.2 Drawings, data sheets and tables . 23
38 Annex A (informative) Suggested presentation of hazardous areas . 24
39 A.1 Preferred symbol key for area classification zones . 24
40 A.2 Example hazardous area classification data sheets . 25
41 Annex B (informative) Area classification examples . 26
42 B.1 Examples of zones . 26
43 B.1.1 General . 26
44 B.1.2 Zone 20 . 26
45 B.1.3 Zone 21 . 26
46 B.1.4 Zone 22 . 26

IEC 60079-10-2 ED3 © IEC 2025 3 31J/383/CDV

47 B.2 Bag emptying station within a building and without exhaust ventilation. 27
48 B.3 Bag emptying station with exhaust ventilation . 28
49 B.4 Cyclone and filter with clean outlet outside building . 29
50 B.5 Drum tipper within a building without exhaust ventilation . 30
51 Annex C (informative) Dust layer hazards . 32
52 C.1 Introductory remarks . 32
53 C.2 Levels of housekeeping . 32
54 C.3 Potential for hot surface ignition . 33
55 Annex D (informative) Hybrid mixtures . 34
56 D.1 General . 34
57 D.2 Ventilation . 34
58 D.3 Explosive limits . 34
59 D.4 Chemical reactions . 34
60 D.5 Minimum ignition parameters . 34
61 D.6 Final classification . 34
62 Bibliography . 35
64 Figure A.1 – Identification of zones on drawings . 24
65 Figure B.1 – Bag emptying station within a building and without exhaust ventilation . 28
66 Figure B.2 – Bag emptying station with exhaust ventilation . 29
67 Figure B.3 – Cyclone and filter with clean outlet outside building . 30
68 Figure B.4 – Drum tipper within a building without exhaust ventilation. Error! Bookmark not
69 defined.
71 Table 1 – Designation of zones depending on presence of dust . 22
72 Table A.1 – Hazardous area classification data sheet – Part I: Flammable substance
73 list and characteristics . 25
74 Table A.2 – Hazardous area classification data sheet – Part II: List of sources of
75 release . 26
31J/383/CDV 4 IEC 60079-10-2 ED3 © IEC 2025
82 INTERNATIONAL ELECTROTECHNICAL COMMISSION
83 ____________
85 EXPLOSIVE ATMOSPHERES –
87 Part 10-2: Classification of areas –
88 Explosive dust atmospheres
90 FOREWORD
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