prEN 60079-13:2025

SLOVENSKI STANDARD
01-september-2025
Eksplozivne atmosfere - 13. del: Zaščita opreme z zaprtimi prostori z nadtlakom
"p" in umetno prezračevani prostori "v"
Explosive atmospheres - Part 13: Equipment protection by pressurized room "p" and
artificially ventilated room "v"
Explosionsgefährdete Bereiche - Teil 13: Schutz von Einrichtungen durch einen
überdruckgekapselten Raum "p” und einen fremdbelüfteten Raum "v“
Atmosphères explosives - Partie 13: Protection du matériel par salle à surpression
interne "p" et salle à ventilation artificielle "v"
Ta slovenski standard je istoveten z: prEN 60079-13:2025
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/391/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-13 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-08-01 2025-10-24
SUPERSEDES DOCUMENTS:
31J/373/CD, 31J/388/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,SC 65B
ASPECTS CONCERNED:
Environment,Safety
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submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Explosive atmospheres - Part 13: Equipment protection by pressurized room "p" and artificially
ventilated room "v"
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
permission in writing from IEC.

IEC CDV 60079-13 © IEC 2025
1 CONTENTS
3 FOREWORD . 4
4 INTRODUCTION . 10
5 1 Scope . 11
6 2 Normative references . 14
7 3 Terms and definitions . 14
8 4 Requirements for all rooms . 17
9 4.1 General . 17
10 4.2 Type and Level of Protection . 17
11 4.2.1 Pressurization “p” . 17
12 4.2.2 Artificial ventilation “v” . 17
13 4.2.3 Protection techniques . 18
14 4.3 Construction . 19
15 4.3.1 Rooms located in hazardous areas . 19
16 4.4 Mechanical strength . 19
17 4.5 Penetrations and seals . 19
18 4.6 Personnel access doors . 20
19 4.7 Inlets and outlets . 20
20 4.8 Ducts . 20
21 4.9 Purging and cleaning . 20
22 4.9.1 General . 20
23 4.9.2 Gases – Purging . 20
24 4.10 Ignition prevention under system failure . 21
25 5 Air supply . 22
26 5.1 General . 22
27 5.2 Source of air . 22
28 5.3 Environmental and air temperature conditions . 22
29 5.4 Heating, ventilation and air conditioning services . 22
30 6 Requirements for pressurized rooms . 23
31 6.1 General . 23
32 6.1.1 Design . 23
33 6.1.2 Source of air . 23
34 6.1.3 Flow . 23
35 6.1.4 Pressurization system . 23
36 6.1.5 Preventing the explosive atmosphere from entering through an open
37 door . 23
38 6.1.6 Airlock . 24
39 6.1.7 Outward air velocity through a door . 24
40 6.1.8 Air consuming device . 24
41 6.1.9 Action when pressurization system fails . 24
42 6.1.10 Re-energizing the room . 25
43 6.2 Purging of rooms . 25
44 6.2.1 General . 25
45 6.2.2 Sequence of operations of the purging safety devices . 25
46 6.2.3 Dusts – Cleaning . 25
47 6.3 Minimum safety provisions, safety devices and electrical disconnects . 25
IEC CDV 60079-13 © IEC 2025
48 6.3.1 Safety devices . 25
49 6.3.2 Safety devices based upon Level of Protection . 26
50 6.3.3 Gas detectors . 26
51 6.4 Verification for pressurized rooms . 27
52 6.4.1 General . 27
53 6.4.2 Tests . 27
54 6.4.3 Overpressure test . 27
55 6.4.4 Purging test . 27
56 6.4.5 Minimum pressure differential test . 27
57 6.4.6 Confirmation of the ratings of the safety devices . 27
58 6.4.7 Verification of sequence of operation of the safety devices . 28
59 6.4.8 Measurement of outward velocity . 28
60 7 Requirements for artificially ventilated rooms . 28
61 7.1 General . 28
62 7.1.1 Design . 28
63 7.1.2 Source of air . 28
64 7.1.3 Layout of equipment . 28
65 7.1.4 Ventilation system . 29
66 7.1.5 Air consuming device . 30
67 7.1.6 Safety actions when ventilation system fails . 30
68 7.1.7 Energizing the artificially ventilated area . 30
69 7.2 Purging of artificially ventilated rooms . 31
70 7.2.1 General . 31
71 7.2.2 Sequence of operations of the purging safety devices . 31
72 7.3 Minimum safety provisions, safety devices and electrical disconnects . 31
73 7.3.1 Safety devices . 31
74 7.3.2 Safety devices based upon Equipment Protection Level . 32
75 7.3.3 Artificial ventilation protection . 32
76 7.3.4 Gas and leak detectors . 32
77 7.4 Loss of artificial ventilation . 33
78 7.5 Verification for artificially ventilated rooms . 33
79 7.5.1 General . 33
80 7.5.2 Tests . 33
81 7.5.3 Minimum ventilation flow rate test . 33
82 7.5.4 Confirmation of the ratings of the safety devices . 33
83 7.5.5 Verification of sequence of operation of the safety devices . 33
84 7.5.6 Purging test . 33
85 7.5.7 Testing of ventilation system . 34
86 8 Marking . 34
87 8.1 General . 34
88 8.2 Marking of pressurized rooms . 35
89 8.3 Marking for artificially ventilated rooms . 36
90 9 Instructions . 36
91 9.1 General . 36
92 9.2 Technical documentation for pressurized rooms . 36
93 9.3 Technical documentation for artificially ventilated rooms . 37
94 9.4 Technical documentation for rooms protected by pressurization and artificial
95 ventilation combined . 38
96 9.5 Equipment assembly with its own source of release . 38
IEC CDV 60079-13 © IEC 2025
97 9.6 Modifications. 38
98 Annex A (informative) Maintenance.
...