Explosive atmospheres - Part 34: Application of quality management systems for Ex Product manufacture (ISO/DIS 80079-34:2025)

ISO/IEC 80079-34:2018 specifies particular requirements and information for establishing and maintaining a quality management system to manufacture Ex Products in accordance with the certificates. While it does not preclude the use of other quality management systems that are compatible with the objectives of ISO 9001:2015 and which provide equivalent results, the minimum requirements are given in this document. This second edition cancels and replaces the first edition, published in 2011, and constitutes a full technical revision. The significant changes with respect to the previous edition should be considered as minor technical revisions. However, the clause numbering in regard to the previous edition has changed in order to be in line with ISO 9001:2015. The normal “Table of Significant Changes” has not been included for this reason. This publication is published as a double logo standard. This standard should be read in conjunction with ISO 9001:2015

Explosionsgefährdete Bereiche - Teil 34: Anwendung von Qualitätsmanagementsystemen für die Herstellung von Ex‑Produkten (ISO/IEC DIS 80079‑34:2025)

Dieses Dokument legt besondere Anforderungen an und Angaben für die Verwirklichung und Aufrechterhaltung von Qualitätsmanagementsystemen zur Herstellung von Ex-Produkten in Übereinstimmung mit dem Zertifikat fest. Obwohl die Anwendung von anderen Qualitätsmanagementsystemen, die mit den Zielsetzungen von ISO 9001:2015 übereinstimmen und zu gleichwertigen Ergebnissen führen, nicht ausgeschlossen wird, werden die Mindestanforderungen in diesem Dokument angegeben.

Atmosphères explosives - Partie 34: Application de systèmes de management de la qualité pour la fabrication des produits Ex (ISO/DIS 80079-34:2025)

ISO/IEC 80079-34:2018 spécifie des exigences particulières et des informations destinées à établir et à maintenir un système de management de la qualité afin de fabriquer des produits Ex, conformément aux certificats existants. Même s’il n'est pas incompatible avec l'utilisation d'autres systèmes de management de la qualité conciliables avec les objectifs de l'ISO 9001:2015 et donnant des résultats équivalents, le présent document indique les exigences minimales. Cette deuxième édition annule et remplace la première édition, parue en 2011. Cette édition constitue une révision technique complète. Il convient de considérer que les modifications importantes apportées à l’édition précédente donnent lieu à une révision technique mineure. Toutefois, la numérotation des articles a été modifiée par rapport à l’édition précédente afin d’être conforme à l’ISO 9001:2015. C’est la raison pour laquelle, l’habituel « Tableau des modifications majeures » n’est pas inclus. Cette publication est publiée en tant que norme à double logo. Il convient d’utiliser la présente norme conjointement avec l'ISO 9001:2015.

Eksplozivne atmosfere - 34. del: Uporaba sistemov vodenja kakovosti za proizvodnjo Ex izdelkov (ISO/DIS 80079-34:2025)

General Information

Status
Not Published
Publication Date
19-Jan-2027
Current Stage
4060 - Closure of enquiry - Enquiry
Start Date
19-Sep-2025
Completion Date
19-Sep-2025

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Draft
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SLOVENSKI STANDARD
01-september-2025
Eksplozivne atmosfere - 34. del: Uporaba sistemov vodenja kakovosti za
proizvodnjo Ex izdelkov (ISO/DIS 80079-34:2025)
Explosive atmospheres - Part 34: Application of quality management systems for Ex
Product manufacture (ISO/DIS 80079-34:2025)
Explosionsgefährdete Bereiche - Teil 34: Anwendung von
Qualitätsmanagementsystemen für die Herstellung von Ex-Produkten (ISO/DIS 80079-
34:2025)
Atmosphères explosives - Partie 34: Application de systèmes de management de la
qualité pour la fabrication des produits Ex (ISO/DIS 80079-34:2025)
Ta slovenski standard je istoveten z: prEN ISO/IEC 80079-34
ICS:
03.120.99 Drugi standardi v zvezi s Other standards related to
kakovostjo quality
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
International
Standard
ISO/IEC
DIS
80079-34
ISO/TMBG
Explosive atmospheres —
Secretariat: ISO
Part 34:
Voting begins on:
Application of quality management 2025-06-27
systems for Ex Product manufacture
Voting terminates on:
2025-09-19
Atmosphères explosives —
Partie 34: Application de systèmes de management de la qualité
pour la fabrication des produits Ex
ICS: 29.260.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
This document is circulated as received from the committee secretariat. IS THEREFORE SUBJECT TO CHANGE
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Reference number
© ISO/IEC 2025
ISO/IEC DIS 80079-34:2025(en)
DRAFT
ISO/IEC DIS 80079-34:2025(en)
International
Standard
ISO/IEC
DIS
80079-34
ISO/TMBG
Explosive atmospheres —
Secretariat: ISO
Part 34:
Voting begins on:
Application of quality management
2025-06-27
systems for Ex Product manufacture
Voting terminates on:
2025-09-19
Atmosphères explosives —
Partie 34: Application de systèmes de management de la qualité
pour la fabrication des produits Ex
ICS: 29.260.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
This document is circulated as received from the committee secretariat.
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This draft is submitted to a parallel vote in ISO and in IEC.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO/IEC 2025
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Published in Switzerland Reference number
© ISO/IEC 2025
ISO/IEC DIS 80079-34:2025(en)
© ISO/IEC 2025 – All rights reserved
ii
ISO/IEC DIS 80079-34:2025(en)
ISO/IEC CDV 80079-34 © IEC 2025
1 CONTENTS
3 FOREWORD . 7
4 INTRODUCTION . 12
5 1 Scope . 13
6 2 Normative references . 13
7 3 Terms and definitions . 13
8 4 Context of the organization . 16
9 4.1 Understanding the organization and its context . 16
10 4.2 Understanding the needs and expectations of interested parties . 16
11 4.3 Determining the scope of the quality management system . 16
12 4.4 Quality management system and its processes . 17
13 5 Leadership . 17
14 5.1 Leadership and commitment . 17
15 5.1.1 General . 17
16 5.1.2 Customer focus . 18
17 5.2 Policy . 18
18 5.2.1 Establishing the quality policy . 18
19 5.2.2 Communicating the quality policy . 18
20 5.3 Organizational roles, responsibilities and authorities . 19
21 6 Planning . 20
22 6.1 Actions to address risks and opportunities . 20
23 6.2 Quality objectives and planning to achieve them . 20
24 6.3 Planning of changes . 21
25 7 Support . 21
26 7.1 Resources . 21
27 7.1.1 General . 21
28 7.1.2 People . 21
29 7.1.3 Infrastructure . 21
30 7.1.4 Environment for the operation of processes . 22
31 7.1.5 Monitoring and measuring resources . 22
32 7.1.6 Organizational knowledge . 23
33 7.2 Competence . 23
34 7.3 Awareness . 24
35 7.4 Communication . 24
36 7.5 Documented information . 24
37 7.5.1 General . 24
38 7.5.2 Creating and updating . 25
39 7.5.3 Control of documented Information . 25
40 8 Operation . 27
41 8.1 Operational planning and control . 27
42 8.2 Requirements for products and services . 27
43 8.2.1 Customer communication . 27
44 8.2.2 Determining the requirements for products and services . 28
45 8.2.3 Review of the requirements for products and services . 28
46 8.2.4 Changes to requirements for products and services . 28
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ISO/IEC DIS 80079-34:2025(en)
ISO/IEC CDV 80079-34 © IEC 2025
47 8.3 Design and development of products and services . 29
48 8.3.1 General . 29

49 8.3.2 Design and development planning . 29
50 8.3.3 Design and development Inputs . 29
51 8.3.4 Design and development controls . 30
52 8.3.5 Design and development outputs . 30
53 8.3.6 Design and development changes . 30
54 8.4 Control of externally provided processes, products and services . 31
55 8.4.1 General . 31
56 8.4.2 Type and extent of control . 31
57 8.4.3 Information for external providers . 32
58 8.5 Production and service provision . 32
59 8.5.1 Control of production and service provision . 32
60 8.5.2 Identification and traceability . 33
61 8.5.3 Property belonging to customers or external providers . 33
62 8.5.4 Preservation . 33
63 8.5.5 Post-delivery activities . 34
64 8.5.6 Control of changes . 34
65 8.6 Release of products and services . 34
66 8.7 Control of nonconforming outputs . 35
67 9 Performance evaluation . 36
68 9.1 Monitoring, measurement, analysis and evaluation . 36
69 9.1.1 General . 36
70 9.1.2 Customer satisfaction . 36
71 9.1.3 Analysis and evaluation . 36
72 9.2 Internal audit . 37
73 9.3 Management review . 38
74 9.3.1 General . 38
75 9.3.2 Management review inputs . 38
76 9.3.3 Management review outputs . 38
77 10 Improvement . 39
78 10.1 General . 39
79 10.2 Nonconformity and corrective action . 39
80 10.3 Continual improvement . 39
81 Annex A (informative) Information relevant to particular Types of Protection and
82 specific Ex Products . 40
83 A.1 Introduction . 40
84 A.2 General . 40
85 A.3 Ex d – Flameproof enclosures covered by IEC 60079-1 . 40
86 A.3.1 Verification . 40
87 A.3.2 Castings . 41
88 A.3.3 Machining . 41
89 A.3.4 Cemented joints and potted assemblies . 41
90 A.3.5 Routine overpressure testing . 41
91 A.3.6 Flanged joints . 43
92 A.3.7 Elements, with non-measurable paths, of breathing and draining
93 devices . 43
94 A.4 Ex i – intrinsic safety covered by IEC 60079-11 . 43
95 A.4.1 Components for intrinsically safe apparatus and associated apparatus . 43
© ISO/IEC 2025 – All rights reserved

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ISO/IEC CDV 80079-34 © IEC 2025
96 A.4.2 Printed circuit boards (PCBs) . 44
97 A.4.3 Conformal coating and encapsulation . 45

98 A.4.4 Sub-assemblies and assemblies . 46
99 A.4.5 Enclosures for Group IIIC or reduced spacing . 46
100 A.4.6 Routine verifications and tests . 46
101 A.4.7 Intrinsically safe circuits and assemblies incorporated in Ex equipment
102 of other Types of Protection . 47
103 A.4.8 Cells and batteries . 47
104 A.4.9 Parameters of loosely specified components . 47
105 A.5 Ex e – Increased safety covered by IEC 60079-7 . 47
106 A.5.1 Degree of protection (IP Code) . 47
107 A.5.2 Internal wiring and contact integrity . 47
108 A.5.3 Rotating machines . 47
109 A.5.4 Windings . 48
110 A.5.5 Terminal boxes . 48
111 A.5.6 Cable Glands, terminals and other accessories . 48
112 A.5.7 Routine verifications and tests . 48
113 A.6 Ex p – Pressurized equipment covered by IEC 60079-2 . 48
114 A.6.1 Degree of protection (IP Code) . 48
115 A.6.2 Components and manufacturing process . 48
116 A.6.3 Components, constructional characteristics . 49
117 A.6.4 Routine verifications and tests . 49
118 A.7 Ex m – Encapsulation covered by IEC 60079-18 . 49
119 A.7.1 Production documentation . 49
120 A.7.2 Routine verifications and tests . 49
121 A.8 Ex o – Liquid immersion covered by IEC 60079-6 . 50
122 A.8.1 Material control . 50
123 A.8.2 Filling . 50
124 A.8.3 Degree of protection (IP Code) . 50
125 A.8.4 Routine verifications and tests . 50
126 A.9 Ex q – Powder filling covered by IEC 60079-5 . 50
127 A.9.1 Material control . 50
128 A.9.2 Filling . 50
129 A.9.3 Degree of protection (IP Code) . 50
130 A.9.4 Routine verifications and tests . 50
131 A.10 Equipment covered by IEC 60079-15 . 51
132 A.10.1 General requirements . 51
133 A.10.2 Ex nA – Non sparking equipment . 51
134 A.10.3 Ex nC– Sealed devices . 51
135 A.10.4 Ex nR– Restricted Breathing . 51
136 A.11 Ex t – Dust ignition protection by enclosure covered by IEC 60079-31 . 52
137 A.11.1 Casting . 52
138 A.11.2 Enclosure parts . 52
139 A.11.3 Gaskets . 52
140 A.11.4 Protection devices . 52
141 A.11.5 Cemented and cast enclosure parts . 52
142 A.11.6 Degree of protection (IP Code) . 53
143 A.11.7 Routine verifications and tests . 53
144 A.12 Ex op – Optical radiation covered by IEC 60079-28 . 53
© ISO/IEC 2025 – All rights reserved

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ISO/IEC CDV 80079-34 © IEC 2025
145 A.13 Gas detectors covered by IEC 60079-29 series . 53
146 A.14 Ex h – Non-electrical Equipment covered by ISO 80079-36 . 54

147 A.14.1 General . 54
148 A.14.2 Non-metallic parts . 54
149 A.14.3 Casing and external parts . 54
150 A.14.4 Earthing and equipotential bonding of conductive parts . 54
151 A.14.5 Light transmitting parts . 54
152 A.14.6 Degree of protection (IP Code)) . 55
153 A.15 Non Electrical Equipment protected by constructional safety “c” covered by
154 ISO 80079-37 . 55
155 A.15.1 General . 55
156 A.15.2 Metal-based material . 55
157 A.15.3 Machining . 55
158 A.15.4 Cemented joints and potted assemblies . 55
159 A.15.5 Assembling . 56
160 A.15.6 Routine tests . 56
161 A.15.7 Power transmission systems . 56
162 A.16 Non-electrical equipment protected by control of ignition sources “b” covered
163 by ISO 80079-37 . 56
164 A.16.1 General . 56
165 A.16.2 Ignition protection system . 56
166 A.16.3 Assembling . 56
167 A.16.4 Routine verifications and tests . 57
168 A.17 Non-electrical equipment protected by liquid immersion “k” covered by
169 ISO 80079-37 . 57
170 A.17.1 General . 57
171 A.17.2 Protective liquid . 57
172 A.17.3 Casing . 57
173 A.17.4 Measuring or indicating devices . 57
174 A.18 Flame arresters covered by ISO/IEC 80079-49 . 58
175 A.19 Equipment assemblies covered by IEC 60079-46 . 58
176 A.19.1 General . 58
177 A.19.2 Limited-scope restrictions . 58
178 A.19.3 Mounting and interconnection of items . 58
179 A.19.4 Routine verifications and tests . 58
180 A.19.5 Incorporation of Ex Equipment . 59
181 A.19.6 Competencies . 59
182 A.19.7 Design and production of equipment assemblies . 59
183 A.19.8 Ignition hazard assessment . 59
184 Annex B (informative) Verification criteria for elements with non-measurable paths
185 used as an integral part of a Type of Protection . 60
186 B.1 Introduction . 60
187 B.2 Verification guidance . 60
188 B.3 Tests . 60
189 B.4 Test examples . 61
190 B.4.1 General . 61
191 B.4.2 Example 1 (pore size) . 61
192 B.4.3 Example 2 (density) . 61
193 B.5 Purchase information . 62
194 B.6 Pre-tested components . 62
© ISO/IEC 2025 – All rights reserved

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ISO/IEC CDV 80079-34 © IEC 2025
195 B.7 Measurement and monitoring . 62
196 Annex C (informative) External provider's declaration of conformity . 63

197 C.1 External provider's declaration of conformity . 63
198 C.2 Additional Supporting information . 63
199 C.3 Example of an external provider's declaration of conformity . 65
200 Annex D (informative) Guidance for the application of this document to the different
201 types of organization . 66
202 Annex E (normative) Type and control of externally provided products, processes and
203 services . 68
204 E.1 Types of products, processes or services. 68
205 E.2 External provider selection and evaluation . 68
206 E.2.1 General . 68
207 E.2.2 Evaluation of external providers of level A . 69
208 E.2.3 Evaluation of external providers of level B . 69
209 E.2.4 Evaluation of external providers of level C . 69
210 E.3 Ongoing evaluation of external providers . 69
211 E.4 Verification of products, processes or services . 70
212 Bibliography . 71
214 Table A.1 – Component specifications that might require consideration . 42
215 Table D.1 – Applicability of this document . 65
216 Table E.1 – Minimum required external provider evaluation level . 67
© ISO/IEC 2025 – All rights reserved

ISO/IEC DIS 80079-34:2025(en)
ISO/IEC CDV 80079-34 © IEC 2025
219 INTERNATIONAL ELECTROTECHNICAL COMMISSION

220 __________
222 EXPLOSIVE ATMOSPHERES –
224 Part 34: Application of quality management systems
225 for Ex Product manufacture
227 FOREWORD
228 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
229 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
230 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
231 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
232 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
233 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
234 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
235 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
236 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
237 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
238 consensus of opinion on the relevant subjects since each technical committee has representation from all
239 interested IEC National Committees.
240 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
241 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
242 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
243 misinterpretation by any end user.
244 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
245 transparently to the maximum extent possible in their national and regional publications. Any divergence between
246 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
247 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
248 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
249 services carried out by independent certification bodies.
250 6) All users should ensure that they have the latest edition of this publication.
251 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
252 members of its technical committees and IEC National Committees for any personal injury, property damage or
253 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
254 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
255 Publications.
256 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
257 indispensable for the correct application of this publication.
258 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
259 rights. IEC shall not be held responsible for identifying any or all such patent rights.
260 International Standard ISO/IEC 80079-34 has been prepared by ISO/IEC subcommittee 31M:
261 Non-electrical equipment and protective systems for explosive atmospheres of IEC technical
262 committee 31: Equipment for explosive atmospheres.
263 This third edition cancels and replaces the second edition, published in 2018, and constitutes
264 a technical revision.
265 This edition includes the following significant technical changes with respect to the previous
266 edition:
267 Users of this document are advised that interpretation sheets clarifying the interpretation of this
268 document can be published. Interpretation sheets are available from the IEC webstore and can
269 be found in the “history” tab of the page for each document.
270 The significant changes with respect to ISO/IEC 80079-34 are listed below.
© ISO/IEC 2025 – All rights reserved

ISO/IEC DIS 80079-34:2025(en)
ISO/IEC CDV 80079-34 © IEC 2025
Type
Minor and
Significant changes Clause
Major technical
editorial Extension
changes
changes
Definition for Ex Product certificate added 3.2 X
Definition for manufacturer modified 3.3.1 X
Definition for manufacturing location added 3.3.2 X
Definition for production site added 3.3.3 X
Definition for local assembler added 3.3.4 X
Definition for trade agent added 3.3.5 X
Modified definition of schedule drawing to be
3.9 X
consistent within TC31.
Definition for External provider’s declaration of
3.13 X
conformity added
Deleted term technical documentation -  C4
Deleted term manufacturer’s documentation -  C5
Clarified that the organization shall determine the
4.1 X
extent of control it applies to the respective locations
Clarified that one Ex authorized person may be
5.3 X
appointed to multiple locations
Added that the Ex authorized person shall be
involved in the approval process of changes to the 6.3  X
quality management system
Clarified that the intent of the clause is, that
personnel has the necessary competence and not 7.2 X
that it necessarily has to be trained.
Clarified that there are no additional requirements in
7.4 X
addition to those of ISO 9001:2015
Clarified the retention period in the context of the
7.5.3j) X
newly introduced organizational sub-structure.
Added External provider’s declaration of conformity
7.5.3j) 12) X
to the list of required records
Clarified that a review shall take place, when
customers state requirements and clarified that
8.2.3 X
where no requirements are stated appropriate
information shall be made available.
Clarified that the Ex authorized person shall ensure
that procedures are reviewed and approved, not 8.2.4
necessarily always be involved in.
Relocated and reworded requirements regarding
outsourcing and ensuring compliance with the Ex 8.4.1
Product certificate and technical documentation.
Relocated the complete section of external provider
8.4.18.4.2  C1
selection to Annex E.
Clarified the requirements regarding nonconforming
Ex Products that have been deemed unsafe and 8.7c)  C2
which have been released for use.
Clarified that each applicable element of the quality
management system shall be internally audited in  X
intervals not exceeding 14 months.
© ISO/IEC 2025 – All rights reserved

ISO/IEC DIS 80079-34:2025(en)
ISO/IEC CDV 80079-34 © IEC 2025
Type
Minor and
Significant changes Clause
Major technical
editorial Extension
changes
changes
Clarified the effects of temperature during
A.2 X
measurement
Clarified that there should be documented
procedures with defined acceptance criteria for all A.2
routine and batch verifications
Removed information deemed redundant with
respect to the responsibility of the organization.
C.2
Information is now contained in 8.4.1 and Annex E.
Drafted Guidance for the application of
ISO/IEC 80079-34 in the context of different types of Annex D  C3
organizations
273 NOTE The technical changes referred include the significant technical changes in the revised standard but is not
274 an exhaustive list of all modifications from the previous version.
Explanations:
A) Definitions
Minor and editorial changes: clarification
decrease of technical requirements
minor technical change
editorial corrections
275 Changes in a standard classified as ‘minor and editorial changes’ refer to changes regarding
276 the previous standard, which modify requirements in an editorial or a minor technical way. In
277 addition, changes of the wording to clarify technical requirements without any technical change
278 are classified as ‘minor and editorial changes’.
279 A reduction in the level of an existing requirement is also classified as a ‘minor and editorial
280 change’.
Extension: addition of technical options
281 Changes in a standard classified as ‘extension’ refers to changes regarding the previous
282 standard, which add new or modify existing technical requirements, in a way that new options
283 are given, but without increasing requirements for equipment that was fully compliant with the
284 previous standard. These ‘extensions’ will therefore not have to be considered for products in
285 conformity with the preceding edition.
Major technical changes: addition of technical requirements
increase of technical requirements
286 Changes in a standard classified as ‘major technical change’ refer to changes regarding the
287 previous standard, which add new or increase the level of existing technical requirements, in a
288 way that a product in conformity with the previous standard will not always be able to fulfil the
289 requirements given in the standard. ‘Major technical changes’ have to be considered for
290 products in conformity with the previous edition.
291 B) Information about the background of Changes
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ISO/IEC CDV 80079-34 © IEC 2025
292 C1 The requirements surrounding the type and control of externally provided products,
293 processes and services have been reworded to better suit the needs of different

294 organizations. In particular the concept of three different types of raw materials (custom,
295 non-custom and general parts) have been introduced including minimum external
296 provider evaluation levels. The evaluation levels are based on whether the verification
297 is performed by the organization itself or whether it is performed by the external provider
298 regardless if done via sub-contracting or because it is no longer possible at a later time.
299 C2 The concept of how to handle nonconforming Ex Products that have been deemed
300 unsafe and have been released for use has been introduced. In particular the
301 information flow to certificate issuers, customers and so forth has been clarified.
302 C3 Edition 3.0 of ISO/IEC 80079-34 splits the organization into five sub-organizations
303 commonly encountered in the industry. The document has been updated to reflect and
304 address the needs of the different organizations and Annex D has been drafted to
305 facilitate the extent of auditing at each organizational level. It is however paramount that
306 Annex D serves as guidance and the context of the organization is determined for each
307 individual organization.
308 C4 The definition of the term technical documentation had significant overlap with the
309 definition of the term schedule drawing. The terms and definitions were aligned with
310 IEC 60079-0, which resulted in the deletion of the term. The document has been updated
311 to reflect the new term.
312 C5 The definition of the term manufacturer’s documentation had significant overlap with the
313 definition of the term related drawing. The terms and definitions were aligned with
314 IEC 60079-0, which resulted in the deletion of the term. The document has been updated
315 to reflect the new term.
316 This publication is published as a double logo standard.
317 This standard should be read in conjunction with ISO 9001:2015.
318 In order to help the reader, the text of the applicable sections of ISO 9001:2015 is reproduced
319 in a rectangular box. Where clauses are referenced within a rectangular box these refer to
320 ISO 9001:2015.
321 The text of this International standard is based on the following documents:
FDIS Report on voting
31M/XX/FDIS 31M/XX/RVD
323 Full information on the voting for the approval of this International Standard can be found in the
324 report on voting indicated in the above table. In ISO, the standard has been approved by XXX
325 P members out of YYY having cast a vote.
326 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
327 A list of all parts of the IEC 60079 series, under the general title Explosive atmospheres, as
328 well as the ISO/IEC 80079 series, can be found on the IEC website.
329 The committee has decided that the contents of this document will remain unchanged until the
330 stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
331 the specific document. At this date, the document will be
332 • reconfirmed,
333 • withdrawn,
© ISO/IEC 2025 – All rights reserved

ISO/IEC DIS 80079-34:2025(en)
ISO/IEC CDV 80079-34 © IEC 2025
334 • replaced by a revised edition, or
335 • amended.
336 A bilingual version of this publication may be issued at a later date.
338 The National Committees are requested to note that for this document the stability date
339 is XXXX.
340 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED
341 AT THE PUBLICATION STAGE.
© ISO/IEC 2025 – All rights reserved

ISO/IEC DIS 80079-34:2025(en)
ISO/IEC CDV 80079-34 © IEC 2025
343 INTRODUCTION
344 This part of ISO/IEC 80079 specifies requirements f
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