oSIST prEN ISO 80079-38:2025

Explosive atmospheres - Part 38: Equipment and components in explosive atmospheres in underground mines (ISO/IEC DIS 80079-38:2025)

ISO/IEC 80079-38:2016 is published as a dual logo standard and specifies the explosion protection requirements for the design, construction, assessment and information for use (maintenance, repair, marking) of equipment that may be an individual item or form an assembly. This includes machinery and components for use in mines susceptible to explosive atmospheres of firedamp and/or combustible dust. The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that equipment can be operated are: - temperature -20 °C to 60 °C; - pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); - and air with normal oxygen content, typically 21 % v/v. This part of ISO/IEC 80079 applies for equipment and components according to EPL Mb to be used in explosive atmospheres containing firedamp and/or combustible dust. For equipment and components according to EPL Ma, the requirements of this standard and of ISO 80079-36 and IEC 60079-0 apply. It is necessary to take account of external conditions to the equipment which may affect the hazard and the resultant protection measures. These measures may include ventilation, gas detection or gas drainage. This part of ISO/IEC 80079 also deals with the prevention of ignitions of explosive atmospheres caused by burning (or smouldering) of combustible material such as fabric fibres, plastic "O"-rings, rubber seals, lubricating oils or greases used in the construction of the equipment if such items could be an ignition source. For example, the mechanical failure of rotating shaft bearings can result in frictional heating that ignites its plastic cage, plastic seal or lubricating grease. Detailed requirements and test procedures for the fire protection of conveyer belts are not part of this part of ISO/IEC 80079. Keywords: explosive atmospheres in underground mines, combustible dust

Explosionsfähige Atmosphären - Teil 38: Geräte und Komponenten in explosionsfähigen Atmosphären in untertägigen Bergwerken (ISO/IEC DIS 80079-38:2025)

Atmosphères explosives - Partie 38: Appareils et composants destinés à être utilisés dans les mines souterraines grisouteuses (ISO/IEC DIS 80079-38:2025)

ISO/IEC 80079-38:2016 est publiée en tant que norme sous double logo et spécifie les exigences relatives aux techniques de protection contre l'explosion au niveau de la conception, de la construction, de l'évaluation et des informations sur l'utilisation (maintenance, réparation et marquage) des appareils qui peuvent être des éléments individuels ou faire partie d'un assemblage. Ces appareils comprennent les machines et les composants prévus pour être utilisés dans les mines pouvant présenter des risques liés au grisou et/ou poussières combustibles. Les conditions atmosphériques normales (relatives aux caractéristiques de l'explosion de l'atmosphère), selon lesquelles il peut être pris pour hypothèse que les appareils peuvent fonctionner, sont les suivantes: - température de -20 °C à 60 °C; - pression de 80 kPa (0,8 bar) à 110 kPa (1,1 bar); - et air à teneur normale en oxygène, généralement, typiquement 21 % v/v. La présente partie de l'ISO/IEC 80079 s'applique aux appareils et aux composants selon EPL Mb destinés à être utilisés en atmosphères explosives contenant le grisou et/ou les poussières combustibles. Les exigences de la présente norme, de l'ISO 80079-36 et de l'IEC 60079-0 s'appliquent aux appareils et aux composants selon EPL Ma. Les conditions externes doivent être prises en considération pour les appareils qui peuvent affecter les dangers et les mesures de protection qui en résultent. Ces mesures peuvent inclure la ventilation, la détection de gaz et le captage de gaz. La présente partie de l'ISO/IEC 80079 traite également de la prévention des inflammations des atmosphères explosives provoquées par la combustion (ou le feu couvant) de matériaux combustibles tels que les fibres textiles, les joints toriques en matières synthétiques, les joints d'étanchéité en caoutchouc, les huiles et graisses de lubrification qui sont nécessaires à l'appareil lorsque ces éléments pourraient représenter une source d'inflammation. L'échauffement provoqué par friction par exemple en raison d'une défaillance d'ordre mécanique ou du palier d'arbre peut enflammer la cage en plastique, le joint en plastique lui-même ou le lubrifiant. Les exigences détaillées et les procédures d'essai pour la protection contre l'incendie des courroies transporteuses ne font pas partie de la présente partie de l'ISO/IEC 80079. Mots clés: utilisés dans les mines souterraines grisouteuses, poussières combustibles

Eksplozivne atmosfere - 38. del: Oprema in komponente, namenjene za uporabo v eksplozivnih atmosferah v podzemnih rudnikih (ISO/IEC DIS 80079-38:2025)

General Information

• Status: Not Published
• Public Enquiry End Date: 19-May-2025
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• ICS: 73.100.30 - Equipment for drilling and mine excavation
• Technical Committee: EXP - Product for explosive atmospheres
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 12-Mar-2025
• Due Date: 30-Jul-2025
• 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: 2023/1230 - Regulation (EU) 2023/1230 of the European Parliament and of the Council of 14 June 2023 on machinery and repealing Directive 2006/42/EC of the European Parliament and of the Council and Council Directive 73/361/EEC (Text with EEA relevance)
• Mandate: M/596 - [C(2023)4798] Commission Implementing Decision of 20.7.2023 on a standardisation request as regards equipment and protective systems intended for use in potentially explosive atmospheres in support of Directive 2014/34/EU (ATEX) of the European Parliament and of the Council
• Mandate: M/605 - COMMISSION IMPLEMENTING DECISION of 20.1.2025 on a standardisation request to the European Committee for Standardization and to the European Committee for Electrotechnical Standardization as regards machinery and related products in support of Regulation (EU) 2023/1230 of the European Parliament and of the Council
• Ref Project: prEN ISO 80079-38 - Explosive atmospheres - Part 38: Equipment and components in explosive atmospheres in underground mines (ISO/IEC DIS 80079-38:2025)

Relations

• Revises: SIST EN ISO/IEC 80079-38:2017 - Explosive atmospheres - Part 38: Equipment and components in explosive atmospheres in underground mines (ISO/IEC 80079-38:2016)
• Effective Date: 05-Jun-2024
• Revises: SIST EN ISO/IEC 80079-38:2017/A1:2018 - Explosive atmospheres - Part 38: Equipment and components in explosive atmospheres in underground mines (ISO/IEC 80079-38:2016)
• Effective Date: 05-Jun-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2025
Eksplozivne atmosfere - 38. del: Oprema in komponente, namenjene za uporabo v
eksplozivnih atmosferah v podzemnih rudnikih (ISO/IEC DIS 80079-38:2025)
Explosive atmospheres - Part 38: Equipment and components in explosive atmospheres
in underground mines (ISO/IEC DIS 80079-38:2025)
Explosionsfähige Atmosphären - Teil 38: Geräte und Komponenten in explosionsfähigen
Atmosphären in untertägigen Bergwerken (ISO/IEC DIS 80079-38:2025)
Atmosphères explosives - Partie 38: Appareils et composants destinés à être utilisés
dans les mines souterraines grisouteuses (ISO/IEC DIS 80079-38:2025)
Ta slovenski standard je istoveten z: prEN ISO 80079-38
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
73.100.30 Oprema za vrtanje in Equipment for drilling and
izkopavanje mine excavation
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

31M/246/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
ISO/IEC 80079-38 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-02-28 2025-05-23
SUPERSEDES DOCUMENTS:
31M/211/CD, 31M/219A/CC
IEC SC 31M : NON-ELECTRICAL EQUIPMENT AND PROTECTIVE SYSTEMS FOR EXPLOSIVE ATMOSPHERES
SECRETARIAT: SECRETARY:
Germany Mrs Anke Sachtleben
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 31,SC 31G,SC 31J
ASPECTS CONCERNED:
SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

This document is still under study and subject to change. It should not be used for reference purposes.
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Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses
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 38: Equipment and components in explosive atmospheres in underground
mines
PROPOSED STABILITY DATE: 2027
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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31M/246/CDV 2 ISO/IEC 80079-38 ED2 © ISO/IEC 2024
1 CONTENTS
3 FOREWORD . 5
4 INTRODUCTION . 11
5 1 Scope . 12
6 2 Normative references . 12
7 3 Terms, definitions and abbreviated terms . 14
8 4 Requirements for Ex Equipment and Ex Components . 16
9 4.1 General . 16
10 4.2 Ignition hazard assessment. 16
11 4.3 Non-electrical Ex Equipment and Ex Components . 17
12 4.4 Electrical Ex Equipment and Ex Components . 17
13 4.4.1 General . 17
14 4.4.2 Over-current protection . 18
15 4.4.3 Earth-fault protection . 18
16 4.4.4 Charging of cells or batteries . 19
17 4.4.5 Mechanical protection of live parts . 19
18 4.4.6 Electric cables that are part of the Ex Equipment . 19
19 5 Additional requirements for specific Ex Equipment and Ex Components . 20
20 5.1 Cutting and stripping equipment . 20
21 5.1.1 General . 20
22 5.1.2 Mining machines with cutting picks . 20
23 5.1.3 Stripping mining machines . 21
24 5.2 Rope haulages for level and inclined transport . 21
25 5.3 Fans . 21
26 5.3.1 Ventilating fans for use in underground parts of mine . 21
27 5.3.2 Other fans . 24
28 5.4 Internal combustion engines . 25
29 5.5 Air compressors . 25
30 5.6 Drilling Ex Equipment and Ex Components . 25
31 5.7 Brakes . 25
32 5.7.1 Brakes used only for stopping in emergency . 25
33 5.7.2 Service brakes (including friction brakes and fluid based retarders) . 26
34 5.8 Traction batteries, starter batteries and vehicle lighting batteries . 26
35 5.9 Equipment and transmission systems using optical radiation . 26
36 5.10 Electromagnetic and ultrasonic energy radiating equipment . 26
37 5.11 Gas monitoring systems . 27
38 6 EPL Ma equipment having the requisite Level of Protection using a second
39 independent means . 27
40 6.1 General . 27
41 6.2 Requirements for an outer enclosure as the second independent means . 27
42 6.2.1 Temperature rise limits . 27
43 6.2.2 Outer enclosure with free space inside . 27
44 6.2.3 Outer enclosure with no free space inside . 27
45 6.2.4 Prevention of ingress of flammable dust and water . 28
46 6.3 Restriction on internal equipment . 28

ISO/IEC 80079-38 ED2 © ISO/IEC 2024 3 31M/246/CDV
47 6.4 Additional type testing for equipment meeting the requisite level of
48 protection by a second independent means . 28
49 6.5 Examples of EPL Ma Equipment having two forms of protection listed in 6.3 . 29
50 7 Fire protection . 31
51 7.1 General . 31
52 7.2 Non-metallic materials . 31
53 7.3 Hydraulic and pneumatic equipment. 31
54 7.3.1 General . 31
55 7.3.2 Fire resistant fluids . 32
56 7.4 Cable-reeling equipment . 32
57 7.5 Fire prevention on electric cables that are part of the mining machine . 33
58 8 Information for use . 33
59 8.1 Signals and warning notices . 33
60 8.2 Instructions . 33
61 8.2.1 Information on use . 33
62 8.2.2 Information on maintenance and repair . 33
63 9 Marking . 34
64 Annex A (informative) Example of an ignition hazard assessment for a shearer
65 intended for use in an explosive atmosphere of a coal mine . 35
66 A.1 General . 35
67 A.2 EPL and intended use of equipment . 35
68 A.3 Construction/description of the equipment with regard to ignition protection . 35
69 A.4 Ignition control and monitoring system . 36
70 A.5 Compliance with the basic methodology and requirements in IEC 60079-0
71 and ISO 80079-36 . 36
72 A.6 Ignition hazard assessment of the electrical parts of the equipment . 37
73 A.7 Ignition hazard assessment of non-electrical ignition sources . 37
74 A.8 Equipment marking . 37
75 Annex B (informative) Additional guidance . 41
76 B.1 Establishing maximum service temperature . 41
77 B.2 Dust deposits and other material in the gap of moving parts . 41
78 B.3 Short-circuit protection . 41
79 B.4 Earth-fault protection . 41
80 B.5 Electric cables that are part of the equipment . 41
81 B.6 Cutting and stripping equipment . 42
82 B.7 Cable-reeled equipment . 42
83 Bibliography . 43
85 Figure 1 – EPL Ma encapsulation “mb” or powder filling “q” equipment inside a
86 flameproof enclosure “db” or pressurized enclosure “pxb” enclosure with optional
87 power supplies . 29
88 Figure 2 – EPL Ma increased safety “eb“ . 29
89 or intrinsically safe “ib” apparatus inside a flameproof “db” or a pressurized “pxb”
90 enclosure . 29
91 Figure 3 – EPL Ma constructional safety “c” inside a flameproof “db” or pressurized
92 “pxb” enclosure . 30
93 Figure 4 – EPL Ma intrinsically safe “ib” or increased safety “eb” apparatus inside an
94 enclosure with encapsulation “mb”, or powder filling “q” or “qb” . 30
95 Figure A.1 – Layout and construction of the coal face shearer . 36

31M/246/CDV 4 ISO/IEC 80079-38 ED2 © ISO/IEC 2024
97 Table 1 – Combination of materials . 24
98 Table 2 – Limit values for hydraulic fluids . 32
99 Table A.1 – Example of an ignition hazard assessment for a shearer, EPL Mb (1 of 3) . 38
ISO/IEC 80079-38 ED2 © ISO/IEC 2024 5 31M/246/CDV
102 INTERNATIONAL ELECTROTECHNICAL COMMISSION
103 ____________
105 EXPLOSIVE ATMOSPHERES –
107 Part 38: Equipment and components in explosive
108 atmospheres in underground mines
111 FOREWORD
112 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
113 all national electrotechnical committees (IEC National Committees). The object of
...