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EVS-EN 60079-31:2014

Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"

General information

Withdrawn from 15.03.2024
Base Documents
IEC 60079-31:2013; EN 60079-31:2014

Although the standard’s status is withdrawn, it still has the presumption of conformity in the meaning of regulation 2014/34/EU and conformance with the regulation ’s requirements can be guaranteed by using the withdrawn version of the standard. The presumption of conformity is valid until a corresponding amendment is published in the Official Journal of the European Union.
 
To view the latest lists of harmonised standards published in the Official Journal of the European Union, visit: 
http://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/

Standard history

Status
Date
Type
Name
15.03.2024
Main
04.08.2014
Main
04.03.2010
Main
EVS-EN 60079-31:2010
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

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