• IEC 60079-31:2013

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  17-01-2022

    Language(s):  English - French, Spanish, Castilian

    Published date:  27-11-2013

    Publisher:  International Electrotechnical Committee

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    Table of Contents - (Show below) - (Hide below)

    FOREWORD
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 General
    5 Construction
    6 Verification and tests
    7 Marking
    Bibliography

    Abstract - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Committee TC 31
    Development Note Supersedes IEC 61241-1. (11/2008) To be read in conjunction with IEC 60079-0. Stability date: 2018. (11/2013)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    UNE-EN 60079-17:2014 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
    CEN/TR 16787 : 2014 INDUSTRIAL GAS INSTALLATION - GUIDELINE
    UNE-EN 50050-2:2014 Electrostatic hand-held spraying equipment - Safety requirements - Part 2: Hand-held spraying equipment for ignitable coating powder
    IEC 60335-2-69 REDLINE : 5.0 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - SAFETY - PART 2-69: PARTICULAR REQUIREMENTS FOR WET AND DRY VACUUM CLEANERS, INCLUDING POWER BRUSH, FOR COMMERCIAL USE
    CSA C22.2 No. 60079.0 : 2015 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
    CSA C22.2 No. 60079-28 : 2016 EXPLOSIVE ATMOSPHERES - PART 28: PROTECTION OF EQUIPMENT AND TRANSMISSION SYSTEMS USING OPTICAL RADIATION
    IEC 60079-0:2017 Explosive atmospheres - Part 0: Equipment - General requirements
    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
    EN ISO 80079-36:2016 Explosive atmospheres - Part 36: Non-electrical equipment for explosive atmospheres - Basic method and requirements (ISO 80079-36:2016)
    BS EN ISO 80079-36:2016 Explosive atmospheres. Non-electrical equipment for explosive atmospheres. Basic method and requirements
    BS EN 1755:2015 Industrial Trucks. Safety requirements and verification. Supplementary requirements for operation in potentially explosive atmospheres
    BS EN 60079-18 : 2015 EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
    EN 60079-28:2015 EXPLOSIVE ATMOSPHERES - PART 28: PROTECTION OF EQUIPMENT AND TRANSMISSION SYSTEMS USING OPTICAL RADIATION (IEC 60079-28:2015)
    EN 50050-3 : 2013 Electrostatic hand-held spraying equipment - Safety requirements - Part 3: Hand-held spraying equipment for ignitable flock
    I.S. EN 60079-28:2015 EXPLOSIVE ATMOSPHERES - PART 28: PROTECTION OF EQUIPMENT AND TRANSMISSION SYSTEMS USING OPTICAL RADIATION
    12/30268608 DC : 0 BS EN 60079-17/ED 5 - EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
    I.S. EN ISO 80079-36:2016 EXPLOSIVE ATMOSPHERES - PART 36: NON-ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - BASIC METHOD AND REQUIREMENTS (ISO/DIS 80079-36:2014)
    DIN EN ISO 80079-36 E : 2016 EXPLOSIVE ATMOSPHERES - PART 36: NON-ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - BASIC METHOD AND REQUIREMENTS (ISO 80079-36:2016)
    ISO 80079-36:2016 Explosive atmospheres Part 36: Non-electrical equipment for explosive atmospheres Basic method and requirements
    09/30206527 DC : 0 BS EN 60079-0 ED 6.0 - EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
    BIS IS/IEC 60079-0 : 2011 EXPLOSIVE ATMOSPHERES - PART 0: GENERAL REQUIREMENTS
    DIN EN 1755:2016-02 Industrial Trucks - Safety requirements and verification - Supplementary requirements for operation in potentially explosive atmospheres
    I.S. EN 1755:2015 INDUSTRIAL TRUCKS - SAFETY REQUIREMENTS AND VERIFICATION - SUPPLEMENTARY REQUIREMENTS FOR OPERATION IN POTENTIALLY EXPLOSIVE ATMOSPHERES
    EN 60079-14:2014/AC:2016 EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION (IEC 60079-14:2013/COR1:2016)
    BIS IS/IEC 60079-18 : 2009 EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
    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 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
    VDI 2263-6 : 2017 DUST FIRES AND DUST EXPLOSIONS - HAZARDS - ASSESSMENT - PROTECTIVE MEASURES - DUST FIRES AND EXPLOSION PROTECTION IN DUST EXTRACTING INSTALLATIONS
    CEI EN 50050-2 : 2014 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 2: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE COATING POWDER
    BS EN 50050-2 : 2013 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 2: 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 - PART 3: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE FLOCK
    13/30248785 DC : 0 BS EN 61800-2 - ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 2: GENERAL REQUIREMENTS - RATING SPECIFICATIONS FOR LOW VOLTAGE ADJUSTABLE FREQUENCY A.C. POWER DRIVE SYSTEMS
    PD CEN/TR 16787:2014 INDUSTRIAL GAS INSTALLATION - GUIDELINE
    UNE-EN 60079-10-2:2016 Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres
    IEC 60079-10-2:2015 RLV Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres
    IEC 60335-2-69:2016 RLV Household and similar electrical appliances - Safety - Part 2-69: Particular requirements for wet and dry vacuum cleaners, including power brush, for commercial use
    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'
    IEC 60335-2-69:2016 Household and similar electrical appliances - Safety - Part 2-69: Particular requirements for wet and dry vacuum cleaners, including power brush, for commercial use
    IEC 60079-18:2014 RLV Explosive atmospheres - Part 18: Equipment protection by encapsulation “m”
    EEMUA 186 : 2016 A PRACTITIONER'S HANDBOOK FOR POTENTIALLY EXPLOSIVE ATMOSPHERES
    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
    BS EN 60079-14:2014 Explosive atmospheres Electrical installations design, selection and erection
    I.S. EN 60079-14:2014 EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION
    IEC 60079-0:2017 RLV Explosive atmospheres - Part 0: Equipment - General requirements
    UNE-EN 60079-0:2013 Explosive atmospheres - Part 0: Equipment - General requirements
    13/30271432 DC : 0 BS EN 60079-18 ED 4.0 - EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
    DIN EN ISO 80079-36:2016-12 Explosive atmospheres - Part 36: Non-electrical equipment for explosive atmospheres - Basic method and requirements (ISO 80079-36:2016)
    EN 1755:2015 Industrial Trucks - Safety requirements and verification - Supplementary requirements for operation in potentially explosive atmospheres
    15/30277841 DC : 0 BS EN 62784 ED 1.0 - PARTICULAR REQUIREMENTS FOR VACUUM CLEANERS AND DUST EXTRACTORS PROVIDING EQUIPMENT PROTECTION LEVEL DC FOR THE COLLECTION OF COMBUSTIBLE DUSTS
    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
    BS EN 60079-28:2015 (published 2015-10) Explosive atmospheres Protection of equipment and transmission systems using optical radiation
    I.S. EN 60079-10-2:2015 EXPLOSIVE ATMOSPHERES - PART 10-2: CLASSIFICATION OF AREAS - EXPLOSIVE DUST ATMOSPHERES
    I.S. EN 50050-3:2013 ELECTROSTATIC HAND-HELD SPRAYING EQUIPMENT - SAFETY REQUIREMENTS - PART 3: HAND-HELD SPRAYING EQUIPMENT FOR IGNITABLE FLOCK
    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'
    IEC 60079-18 : 2014 REDLINE EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
    IEC 60079-0 REDLINE : 7.0 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
    I.S. EN 60079-0:2012 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011 (MOD))
    IEC 60079-10-2 REDLINE : 2ED 2015 EXPLOSIVE ATMOSPHERES - PART 10-2: CLASSIFICATION OF AREAS - EXPLOSIVE DUST ATMOSPHERES
    IEC 60079-17:2013 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
    12/30269297 DC : 0 BS EN 60079-14/ED 5 - EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION
    UNE-EN ISO 80079-36:2017 Explosive atmospheres - Part 36: Non-electrical equipment for explosive atmospheres - Basic method and requirements (ISO 80079-36:2016)
    12/30236742 DC : 0 BS ISO/IEC 80079-36 - EXPLOSIVE ATMOSPHERES - PART 36: NON-ELECTRICAL EQUIPMENT FOR USE IN EXPLOSIVE ATMOSPHERES - BASIC METHODS AND REQUIREMENTS
    EN 60079-0:2012/A11:2013 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011, MODIFIED)
    EN 60079-17:2014 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
    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 (IEC 60079-10-2:2015)

    Standards Referencing This Book - (Show below) - (Hide below)

    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
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