International Standards and Conformity Assessment for all electrical, electronic and related technologies

 

Project

Reference EN 60079-31:201X
Title Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
Project Number 24107
Abstract/Scope 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
Status
Approved

Status

Current Stage code 5099
Current Stage code date 2014-01-01
Current Stage code deadline 2014-01-29
Deadline date for vote  

Legal

Directive(s) ATEX (94/9/EC)
Mandate(s)  
Order Voucher  

Details

IEC Technical Body IEC/TC 31
Reference Document IEC 60079-31:2013 (EQV)
ICS 29.260.20 - Electrical apparatus for explosive atmospheres
Keywords Explosive atmospheres; Dust; Ignition protection
Note 2013-12-10 - Publication editing allocated to hamrani@cencenelec.eu * Will supersede EN 60079-31:1009
A-Deviation(s)  
Special National Condition(s)  

Environment

Clause
Categories - Aspects
Product Life Cycle
Information

History

Stage
Date
Deadline Date
Documents
5099 2014-01-01 2014-01-29  
5060 2013-10-21 2013-11-11 export to doc file  EN
5020 2013-08-16 2013-10-18  
3090 2013-08-13 2013-08-16  
5060 2012-08-20 2012-09-10 export to doc file  EN
5020 2012-03-16 2012-08-17  
1090 2012-03-13 2012-03-16  

Implementation Dates

date of Ratification (DOR) (1) 2014-01-01
date of Availability (DAV) (2)  
date of Announcement (DOA) (3) 2014-04-01
date of Publication (DOP) (4) 2014-10-01
date of Withdrawal (DOW) (5) 2017-01-01

Relations

Supersedes EN 60079-31:2009
Superseded by  
Normative reference (6) ISO 965-1
EN 60079-0
EN 60127 series
EN 60691

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved


(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat


(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level


(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement


(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn


(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.