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BS EN IEC 60079-26:2024

BS EN IEC 60079-26:2024

$142.49

Explosive atmospheres – Equipment with Separation Elements or combined Levels of Protection

Published By Publication Date Number of Pages
BSI 2024 28
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IEC 60079-26:2021 specifies requirements for construction, testing and marking for Ex Equipment that contains parts of the equipment with different Equipment Protection Levels (EPLs) and a separation element. This equipment is mounted across a boundary where different EPLs are required, for example between different gas hazardous areas, dust hazardous areas or gas hazardous areas adjacent to dust hazardous areas. Separation elements are considered for both electrical and non-electrical equipment. If mechanical energy can be transformed into a potential ignition source, additionally an ignition hazard assessment in accordance with ISO 80079-36 is performed and appropriate measures are undertaken. This document also specifies requirements for the combination of two Types of Protection, each with EPL Gb, to achieve EPL Ga. This document supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this document conflicts with a requirement of IEC 60079-0, the requirement of this document takes precedence. This fourth edition cancels and replaces the third edition and constitutes a technical revision. Please see the IEC 60079-26:2020 foreword for a description of the main changes with respect to the previous edition.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 English
CONTENTS
8 FOREWORD
11 1 Scope
2 Normative references
12 3 Terms and definitions
4 Ex Equipment with two combined Types of Protection
4.1 General
4.2 Basic requirements
13 4.3 Electrical Connections
5 Ex Equipment containing parts with different EPLs and a separation element
5.1 General
5.2 Separation elements
5.2.1 General
Tables
Table 1 – Requirements for Ex Equipment containing parts with different EPLs.
14 5.2.2 Basic requirements
5.2.3 Mechanical partition walls
5.2.4 Metallic partition walls with gas-tight conductor bushings
15 5.2.5 Partition wall supplemented with a joint
5.2.6 Partition wall for explosive gas atmospheres supplemented with natural ventilation
Figures
Figure 1 – Partition wall with a conductor bushing considered as gas diffusion tight
16 5.2.7 Requirements depending on the thickness of the partition wall
Figure 2 – Example of a separation element with a cylindrical shaft joint and ventilation
17 6 Process connection
18 7 Type tests
7.1 Standardized Types of Protection
7.2 Separation elements
7.3 Temperature evaluation
8 Marking
8.1 General
8.2 Ex Equipment with two combined Types of Protection
19 8.3 Ex Equipment containing parts with different EPLs
8.4 Examples of marking:
Figure 3 – Example g) of marking of equipment with a separation element
20 9 Instructions
9.1 Separation elements
9.2 Process connection
9.3 EPL allocation
21 Annex A (normative)Types of construction for separation elements
Table A.1 – Ex Equipment with separation elements mounted at a boundary of Zone 0
22 Table A.2 – Ex Equipment with separation elements mounted at a boundary of Zone 1
23 Table A.3 – Ex Equipment with separation elements mounted at a boundary of Zone 20
Table A.4 – Ex Equipment with separation elements mounted at a boundary of Zone 21
24 Table A.5 – Ex Equipment with separation elements mountedat a boundary of Zone 0 in Zone 21 or 22
Table A.6 – Ex Equipment with separation elements mountedat a boundary of Zone 1 in Zone 21 or 22
25 Table A.7 – Ex Equipment with separation elements mountedat a boundary of Zone 20 in Zone 1 or 2
26 Table A.8 – Ex Equipment with separation elements mountedat a boundary of Zone 21 in Zone 1 or 2
27 Bibliography

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BS EN IEC 60079-26:2024
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