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IEC 60079-31 Revised

IEC 60079-31:2013
Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
IEC 60079-31:2013 is applicable to electrical equipment protected by enclosure and surface temperature limitation for use in explosive dust atmospheres. It specifies requirements for design, construction and testing of electrical equipment and Ex Components. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. This standard does not apply to dusts of explosives, which do not require atmospheric oxygen for combustion, or to pyrophoric substances. This standard does not apply to electrical equipment or Ex Components intended for use in underground parts of mines as well as those parts of surface installations of such mines endangered by firedamp and/or combustible dust. This standard does not take account of any risk due to an emission of flammable or toxic gas from the dust. Consideration of additional protective measures is required where the application of electrical equipment is in atmospheres, which can contain combustible dust as well as explosive gas, whether simultaneously or separately. Where the electrical equipment has to meet other environmental conditions, for example, protection against ingress of water and resistance to corrosion, additional measures can be necessary. The measures used should not adversely affect the integrity of the enclosure. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. The major technical changes include:
- The marked maximum surface temperature shall be measured on the external surfaces of the enclosure and the surfaces of the internal components for equipment with types of protection "ta";
- Additional protection for arcing and sparking parts for "ta";
- Test for internal enclosure for level "ta" added. Keywords: explosive dust atmospheres
The contents of the Interpretation Sheet 1 of February 2022 have been included in this copy.
This publication is to be read in conjunction with IEC 60079-0:2011.
BASE PUBLICATION
  CHF 80.-
A more recent version of this publication exists: IEC 60079-31:2022 RLV

Technical committee

TC 31 Equipment for explosive atmospheres
Publication typeInternational Standard
Publication date2013-11-27
Edition2.0
ICS

29.260.20

Withdrawal date2022-01-17
ISBN number9782832211854
Pages28
File size1.18 MB
EditionDatePublicationEditionStatus
Edition 32023-10-31IEC 60079-31:2022/COR1:20233.0Valid
Edition 22022-02-04IEC 60079-31:2013/ISH1:20222.0Revised
Edition 12022-02-04IEC 60079-31:2008/ISH1:20221.0Revised
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    TC 61/SC 61J
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    TC 31/SC 31J
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