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EN 60079-31:2014

Current
Current

The latest, up-to-date edition.

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

11-07-2014

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Construction
6 Verification and tests
7 Marking
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications
Annex ZZ (informative) - Coverage of Essential
         Requirements of EU Directives
Annex ZY (informative) - Significant changes between
         This European Standard and EN 60079-31:2009

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

Committee
CLC/TC 31
DevelopmentNote
Supersedes EN 61241-1. (01/2010) To be read in conjunction with EN 60079-0. (07/2014)
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Current
Supersedes

UNE-EN 60079-17:2014 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
PREN 1127-1 : DRAFT 2017 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
UNE-EN 50050-2:2014 Electrostatic hand-held spraying equipment - Safety requirements - Part 2: Hand-held spraying equipment for ignitable coating powder
S.R. CEN/TR 16787:2014 INDUSTRIAL GAS INSTALLATION - GUIDELINE
UNE-EN 50050-3:2014 Electrostatic hand-held spraying equipment - Safety requirements - Part 3: Hand-held spraying equipment for ignitable flock
17/30365866 DC : 0 BS EN 1127-1 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
BS EN 1755:2015 Industrial Trucks. Safety requirements and verification. Supplementary requirements for operation in potentially explosive atmospheres
UNE-EN 1127-1:2012 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
BS EN 60079-18 : 2015 EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
DIN EN 1127-2:2002-07 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
EN 50050-3:2013 Electrostatic hand-held spraying equipment - Safety requirements - Part 3: Hand-held spraying equipment for ignitable flock
CEN/TR 16787:2014 Industrial Gas Installation - Guideline
12/30270980 DC : 0 BS EN 1127-2 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
BS EN 1127-1:2011 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
DIN EN 1755:2016-02 Industrial Trucks - Safety requirements and verification - Supplementary requirements for operation in potentially explosive atmospheres
DIN EN 1127-1:2011-10 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
I.S. EN 1127-2:2014 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
I.S. EN 1755:2015 INDUSTRIAL TRUCKS - SAFETY REQUIREMENTS AND VERIFICATION - SUPPLEMENTARY REQUIREMENTS FOR OPERATION IN POTENTIALLY EXPLOSIVE ATMOSPHERES
VDI 2263 Blatt 5.1:2014-10 Dust fires and dust explosions - Hazards, assessment, protective measures - Explosion protection in fluid bed dryers - Hints and examples of operation
VDI 2263 Blatt 6:2017-08 Dust fires and dust explosions - Hazards - assessment - protective measures - Dust fires and explosion protection in dust extracting installations
VDI 2262 Blatt 1:2013-06 Workplace air - Reduction of exposure to air pollutants - Legal principles, terms and definitions, basic organisational measures for industrial safety and environmental protection
CEI EN 50050-2 : 2014 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 2: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE COATING POWDER
13/30257895 DC : 0 BS EN 1755 - SAFETY OF INDUSTRIAL TRUCKS - OPERATION IN POTENTIALLY EXPLOSIVE ATMOSPHERES - USE IN FLAMMABLE GAS, VAPOUR, MIST AND DUST
BS EN 50050-2:2013 Electrostatic hand-held spraying equipment. Safety requirements Hand-held spraying equipment for ignitable coating powder
BS EN 60079-10-2:2015 Explosive atmospheres Classification of areas. Explosive dust atmospheres
BS EN 60079-17:2014 Explosive atmospheres Electrical installations inspection and maintenance
CEI EN 60079-17 : 2015 EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
BS EN 50050-3:2013 Electrostatic hand-held spraying equipment. Safety requirements Hand-held spraying equipment for ignitable flock
PD CEN/TR 16787:2014 Industrial Gas Installation. Guideline
I.S. EN 50050-2:2013 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 2: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE COATING POWDER
I.S. EN 60079-17:2014 EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
CEI EN 60079-18 : 2016 EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
BS EN 1127-1:2019 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
I.S. EN 1127-1:2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
DIN EN 1127-2:2014-09 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
UNE-EN 60079-14:2016 Explosive atmospheres - Part 14: Electrical installations design, selection and erection
UNE-EN 1755:2016 Industrial Trucks - Safety requirements and verification - Supplementary requirements for operation in potentially explosive atmospheres
UNI EN 1127-2 : 2014 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
PREN 1755 : DRAFT 2013 SAFETY OF INDUSTRIAL TRUCKS - OPERATION IN POTENTIALLY EXPLOSIVE ATMOSPHERES - USE IN FLAMMABLE GAS, VAPOUR, MIST AND DUST
UNI EN 1127-1 : 2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
UNE-EN 60079-0:2013 Explosive atmospheres - Part 0: Equipment - General requirements
BS EN 1127-2:2014 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology for mining
EN 1755:2015 Industrial Trucks - Safety requirements and verification - Supplementary requirements for operation in potentially explosive atmospheres
UNE-EN 60079-28:2016 Explosive atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation
CEI EN 50050-3 : 2014 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 3: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE FLOCK
I.S. EN 50050-3:2013 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 3: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE FLOCK
PREN 1127-2 : DRAFT 2012 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
EN 60079-18:2015/A1:2017 EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M' (IEC 60079-18:2014/A1:2017)
BS EN 60079-0 : 2012 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
I.S. EN 60079-18:2015 EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
I.S. EN 60079-0:2012 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011 (MOD))
EN 60079-0:2012/A11:2013 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011, MODIFIED)
EN 1127-2:2014 Explosive atmospheres - Explosion prevention and protection - Part 2: Basic concepts and methodology for mining
EN 60079-17:2014 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
EN 1127-1:2011 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
EN 50050-2 : 2013 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 2: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE COATING POWDER
EN 60079-10-2:2015 Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres

EN 60079-0:2012/A11:2013 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011, MODIFIED)
EN 60691:2016 Thermal-links - Requirements and application guide
IEC 60050-426:2008 International Electrotechnical Vocabulary (IEV) - Part 426: Equipment for explosive atmospheres
IEC 60691:2015 Thermal-links - Requirements and application guide
IEC 60079-0:2011 Explosive atmospheres - Part 0: Equipment - General requirements
ISO 965-1:2013 ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data
1994/9/EC : 1994 DIRECTIVE 94/9/EC OF THE EUROPEAN PARLIAMENT AND THE COUNCIL OF 23 MARCH 1994 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES CONCERNING EQUIPMENT AND PROTECTIVE SYSTEMS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES

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