Explosive atmospheres - Part 38: Equipment and components in explosive atmospheres in underground mines

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

Atmosphères explosives - Partie 38: Appareils et composants destinés à être utilisés dans les mines souterraines grisouteuses

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

General Information

Status
Published
Publication Date
17-Feb-2016
Current Stage
PPUB - Publication issued
Start Date
18-Feb-2016
Completion Date
18-Feb-2016
Ref Project

Buy Standard

Standard
ISO/IEC 80079-38:2016 - Explosive atmospheres - Part 38: Equipment and components in explosive atmospheres in underground mines
English and French language
113 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

ISO/IEC 80079-38
Edition 1.0 2016-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 38: Equipment and components in explosive atmospheres in underground
mines
Atmosphères explosives –
Partie 38: Appareils et composants destinés à être utilisés dans les mines
souterraines grisouteuses
ISO/IEC 80079-38:2016-02(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2016 ISO/IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about

ISO/IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address

below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'ISO/IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication,

utilisez les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org

The stand-alone application for consulting the entire The world's leading online dictionary of electronic and

bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in

Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional

documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical

iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary

The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and

variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of

committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been

and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc

details all new publications released. Available online and If you wish to give us your feedback on this publication or

also once a month by email. need further assistance, please contact the Customer Service

Centre: csc@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 15
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary

La recherche avancée permet de trouver des publications IEC 65 000 entrées terminologiques électrotechniques, en anglais

en utilisant différents critères (numéro de référence, texte, et en français, extraites des articles Termes et Définitions des

comité d’études,…). Elle donne aussi des informations sur les publications IEC parues depuis 2002. Plus certaines entrées

projets et les publications remplacées ou retirées. antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just

Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette

Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:

csc@iec.ch.
---------------------- Page: 2 ----------------------
ISO/IEC 80079-38
Edition 1.0 2016-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 38: Equipment and components in explosive atmospheres in underground
mines
Atmosphères explosives –
Partie 38: Appareils et composants destinés à être utilisés dans les mines
souterraines grisouteuses
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.230; 29.260.20 ISBN 978-2-8322-3180-7

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

---------------------- Page: 3 ----------------------
– 2 – ISO/IEC 80079-38:2016
 ISO/IEC 2016
CONTENTS

FOREWORD ......................................................................................................................... 5

INTRODUCTION ................................................................................................................... 7

1 Scope ............................................................................................................................ 9

2 Normative references..................................................................................................... 9

3 Terms, definitions and abbreviated terms ..................................................................... 10

4 Requirements for equipment (machines) and components ............................................ 14

4.1 General ............................................................................................................... 14

4.2 Ignition hazard assessment ................................................................................. 15

4.2.1 Formal analysis ............................................................................................ 15

4.2.2 Assessment for equipment-group I, EPL Mb ................................................. 15

4.2.3 Establishing the maximum surface temperature ............................................ 15

4.2.4 Dust deposits and other material in the gap of moving parts .......................... 15

4.2.5 Ignition hazard assessment report ................................................................ 16

4.2.6 Ignition sources ........................................................................................... 16

4.3 Non-electrical equipment and components ........................................................... 16

4.4 Electrical equipment and components .................................................................. 16

4.4.1 General ....................................................................................................... 16

4.4.2 Electrical equipment protection ..................................................................... 17

4.4.3 Over-current protection ................................................................................ 17

4.4.4 Earth-fault protection .................................................................................... 18

4.4.5 Mechanical protection of live parts ................................................................ 19

4.4.6 Electric cables that are part of the equipment ............................................... 19

5 Additional requirements for specific equipment and components ................................... 20

5.1 Cutting and stripping equipment .......................................................................... 20

5.1.1 General ....................................................................................................... 20

5.1.2 Machines with cutting picks .......................................................................... 20

5.1.3 Stripping machines ...................................................................................... 21

5.2 Rope haulages for level and inclined transport ..................................................... 21

5.3 Fans ................................................................................................................... 21

5.3.1 Ventilating fans for use in underground parts of mine .................................... 21

5.3.2 Other fans .................................................................................................... 23

5.4 Internal combustion engines ................................................................................ 23

5.5 Air compressors .................................................................................................. 24

5.6 Drilling equipment and components ..................................................................... 24

5.7 Brakes ................................................................................................................ 25

5.7.1 Brakes used only for stopping in emergency ................................................. 25

5.7.2 Service brakes (including friction brakes and fluid based retarders) ............... 25

5.7.3 Parking brakes ............................................................................................. 25

5.8 Traction batteries, starter batteries and vehicle lighting batteries .......................... 25

5.9 Optical fibres used on machines and electromagnetic radiation from

components on machines .................................................................................... 26

5.9.1 External pipes/optical fibres ......................................................................... 26

5.9.2 Radio-frequency radiation from equipment .................................................... 26

5.10 Gas monitoring systems ...................................................................................... 26

6 Fire protection ............................................................................................................. 27

6.1 General ............................................................................................................... 27

---------------------- Page: 4 ----------------------
ISO/IEC 80079-38:2016 – 3 –
 ISO/IEC 2016

6.2 Non-metallic materials ......................................................................................... 27

6.3 Hydraulic and pneumatic equipment .................................................................... 27

6.4 Requirements for cable-reeled equipment ............................................................ 29

6.4.1 General ....................................................................................................... 29

6.4.2 Special requirements ................................................................................... 29

6.5 Fire prevention on electric cables that are part of the machine ............................. 29

6.6 Conveyor belting ................................................................................................. 29

7 Information for use ...................................................................................................... 30

7.1 Signals and warning notices ................................................................................ 30

7.2 Instructions ......................................................................................................... 30

7.2.1 Information on use ....................................................................................... 30

7.2.2 Information on maintenance and repair ......................................................... 30

8 Marking ....................................................................................................................... 30

Annex A (informative) Example of an ignition hazard assessment for a conveyor belt

intended for use in a coal mine............................................................................................ 32

A.1 General ............................................................................................................... 32

A.2 EPL and intended use of the equipment ............................................................... 32

A.3 Construction and description of the equipment ..................................................... 32

A.4 Assessment ........................................................................................................ 33

Annex B (informative) Example of an ignition hazard assessment for a shearer loader

intended for use in a potentially explosive atmosphere of a coal mine .................................. 36

B.1 General ............................................................................................................... 36

B.2 EPL and intended use of equipment .................................................................... 36

B.3 Construction/description of the equipment with regard to ignition protection .......... 36

B.4 Ignition control and monitoring system ................................................................. 37

B.5 Compliance with the basic methodology and requirements in ISO 80079-36 ......... 37

B.6 Ignition hazard assessment of the electrical parts of the equipment ...................... 38

B.7 Ignition hazard assessment of non-electrical ignition sources ............................... 38

B.8 Equipment marking ............................................................................................. 38

Annex C (normative) Ignition sources ................................................................................. 42

C.1 Hot surfaces ....................................................................................................... 42

C.2 Flames and hot gases (including hot particles) ..................................................... 42

C.3 Mechanically generated sparks ............................................................................ 43

C.4 Electrical equipment ............................................................................................ 43

C.5 Stray electric currents ......................................................................................... 43

C.6 Static electricity................................................................................................... 44

C.7 Lightning ............................................................................................................. 44

4 12
C.8 Radio frequency (RF) electromagnetic waves from 10 Hz to 3 × 10 Hz

(high frequency) .................................................................................................. 44

11 15

C.9 Electromagnetic waves from 3 × 10 Hz to 3 × 10 Hz ..................................... 45

C.10 Ionizing radiation ................................................................................................. 45

C.11 Ultrasonics .......................................................................................................... 45

C.12 Adiabatic compression and shock waves ............................................................. 45

C.13 Exothermic reactions, including self-ignition of dusts ............................................ 46

Annex D (informative) Guidance on potential risks for converter-fed motors ........................ 47

Annex E (normative) Tests for surface protective coating for group I hand tools

of EPL Mb .......................................................................................................................... 48

E.1 Incendive impact tests in explosive mixture .......................................................... 48

E.1.1 Verification of ignition of the raw light alloy material ...................................... 48

---------------------- Page: 5 ----------------------
– 4 – ISO/IEC 80079-38:2016
 ISO/IEC 2016

E.1.2 Estimation of protective coating efficiency .................................................... 48

E.1.3 Evaluation of results ..................................................................................... 49

E.2 Adhesion test of the protective coating ................................................................ 49

Bibliography ....................................................................................................................... 51

Figure B.1 – Layout and construction of the coal face shearer loader ................................... 37

Figure E.1 – Rig for impact ignition test ............................................................................... 50

Table 1 – Combination of materials ..................................................................................... 23

Table 2 – Limit values for hydraulic fluids ............................................................................ 28

Table A.1 – Example of an ignition hazard assessment for a mining conveyor, EPL Mb

(1 of 2) ............................................................................................................................... 33

Table B.1 – Example of an ignition hazard assessment for a shearer loader, EPL Mb

(1 of 3) ............................................................................................................................... 39

---------------------- Page: 6 ----------------------
ISO/IEC 80079-38:2016 – 5 –
 ISO/IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 38: Equipment and components in explosive
atmospheres in underground mines
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

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 ISO/IEC 80079-38 has been prepared by subcommittee 31M: Non-

electrical equipment and protective systems for explosive atmospheres, of IEC technical

committee 31: Equipment for explosive atmospheres.
It is published as a double logo standard.
The text of this standard is based on the following documents of the IEC:
FDIS Report on voting
31M/105/FDIS 31M/111/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table. In ISO, the standard has been approved by 13 P members

out of 21 having cast a vote.
---------------------- Page: 7 ----------------------
– 6 – ISO/IEC 80079-38:2016
 ISO/IEC 2016

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

"A list of all parts in the IEC 60079 series, under the general title Explosive atmospheres, as

well as the International Standard 80079 series, can be found on the IEC website."

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
ISO/IEC 80079-38:2016 – 7 –
 ISO/IEC 2016
INTRODUCTION

This part of ISO/IEC 80079 specifies requirements for the constructional features of

equipment and components that may be an individual item or form an assembly, to enable

them to be used in mines, or parts of mines, susceptible to explosive atmospheres of firedamp

and/or combustible dust.

Most of the electrical equipment used on mining machinery is certified as an individual item of

equipment, e.g. the motor, switchgear etc., and meets its own marking requirements. This

certification, however, does not deal with the interconnection of these items of equipment by

cables or the machine electrical power system as an entity. The equipment and components,

including their interconnections, should be assessed, from an ignition point of view, by the

manufacturer.

Both non-electrical equipment and the interconnection of electrical/non-electrical equipment

require an ignition hazard assessment.

Therefore, it is necessary that not just the equipment, but all its parts, is examined by the

manufacturer according to a formally documented ignition hazard assessment that establishes

and lists all the possible ignition sources of the equipment including the cables and electrical

supply system. The documentation shall list the measures that shall be introduced to keep

possible ignition sources from becoming effective.

The need for this International Standard arises because of major operational differences

between underground mining operations and those in other industries working with, or in,

explosive atmospheres. Examples of these differences are:
– the product being won from the underground strata may be combustible and may
continually release firedamp during the winning process;

– the ignitability of the atmosphere around equipment and components usually depends

upon the amount of dilution offered by an active ventilating system;

– the atmosphere in the general body of mine air in which machinery is working may change

from one that is potentially explosive to one that is explosive (for example, during an

outburst of firedamp);

– persons working in the mine are usually situated within the potentially explosive

atmosphere;

– there is a need to monitor constantly the mine atmosphere at strategic places to ensure

that power can be disconnected from all equipment except Ma equipment which is suitable

for use in a constantly explosive atmosphere;

– in gassy coal mines, an explosion of firedamp at a machine can raise a combustible dust

cloud that exacerbates the explosion;

– some mining machinery, especially that associated with winning the product, contains

cutting devices and drilling devices that are intended to cut into the combustible product

as part of their normal operation. This introduces an ignition risk from frictional heating or

frictional sparking from contact with strata containing high concentrations of quartz or iron

pyrites;

– long roadways in coal mines are equipped with mineral conveying systems carrying a

product that has a potential for raising a combustible dust cloud and the production of

firedamp.

To decide which equipment or its component parts should merit inclusion in this International

Standard, ignition data has been examined based on international experience.

When drafting this International standard, it has been assumed that equipment and

components are:
---------------------- Page: 9 ----------------------
– 8 – ISO/IEC 80079-38:2016
 ISO/IEC 2016

– designed in accordance with good engineering practice, taking account of expected

shocks, vibrations and failure modes;
– of sound mechanical and electrical construction;
– made of materials with adequate strength and of suitable quality;
– free from defects; and

– kept in good repair and working order, e.g. so that the required dimensions remain within

permissible tolerance despite wear.
---------------------- Page: 10 ----------------------
ISO/IEC 80079-38:2016 – 9 –
 ISO/IEC 2016
EXPLOSIVE ATMOSPHERES –
Part 38: Equipment and components in explosive
atmospheres in underground mines
1 Scope

This part of ISO/IEC 80079 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.

NOTE 1 In some countries, there might be differences according to the classification, e.g. Mb is similar to

category M2 in the European Union.

For equipment and components according to EPL Ma, the requirements of this standard and

of ISO 80079-36 and IEC 60079-0 apply.
NOTE 2 A standard with additional requirements for EPL Ma is under preparation.

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 m
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.