UL 60079-1
Explosive Atmospheres - Part 1: Equipment Protection by Flameproof Enclosures “d”

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2009-04-10DOD Approved: --
Price Code:GANSI Approved: 2013-08-09
Type:ulisa

  • SCOPE

    1 Scope

    This part of IEC 60079 contains specific requirements for the construction and testing of electrical equipment with the type of protection flameproof enclosure “d”, intended for use in explosive gas atmospheres.

    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 will take precedence.

    NOTE Equipment protection by flameproof enclosures “d” provides Equipment Protection Level (EPL) Gb. For further information, see Annex g.

    1DV.1 Modification of Clause 1 first paragraph to replace as follows:

    This standard contains specific requirements for the construction and testing of electrical equipment with the type of protection flameproof enclosure “d”, intended for use in Class I, Zone 1, explosive gas atmospheres.

    1DV.2 Addition of 1DV.2.1 and 1DV.2.2 to Clause 1:

    1DV.2.1 The U.S. version of IEC 60079-1 does not include requirements for Group I electrical apparatus. Requirements for Group I electrical apparatus included in this document are to be considered omitted in all instances where they appear.

    1DV.2.2 Where references are made to other IEC 60079 standards, the referenced requirements found in these standards shall apply as modified by any applicable U.S. National Differences.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
    • Foreword
    • Deviations
    • IEC Foreword
      • Explosive Atmospheres – Part 1: Equipment Protection by Flameproof Enclosures “d”
        • 1 Scope
        • 2 Normative references
        • 3 Terms and definitions
        • 4 Equipment grouping and temperature classification
        • 5 Flameproof joints
          • 5.1 General requirements
          • 5.2 Non-threaded joints
          • 5.3 Threaded joints
          • 5.4 Gaskets (including O-rings)
          • 5.5 Equipment using capillaries
        • 6 Cemented joints
          • 6.1 General
          • 6.2 Mechanical strength
          • 6.3 Width of cemented joints
        • 7 Operating rods
        • 8 Supplementary requirements for shafts and bearings
          • 8.1 Joints of shafts
          • 8.2 Bearings
        • 9 Light-transmitting parts
        • 10 Breathing and draining devices which form part of a flameproof enclosure
          • 10.1 Openings for breathing or draining
          • 10.2 Composition limits
          • 10.3 Dimensions
          • 10.4 Elements with measurable paths
          • 10.5 Elements with non-measurable paths
          • 10.6 Removable devices
          • 10.7 Mounting arrangements of the elements
          • 10.8 Mechanical strength
          • 10.9 Breathing devices and draining devices when used as Ex components
        • 11 Fasteners, associated holes and blanking elements
        • 12 Materials and mechanical strength of enclosures – Materials inside the enclosures
        • 13 Entries for flameproof enclosures
          • 13.1 Cable glands
          • 13.2 Conduit sealing devices
          • 13.3 Plugs and sockets and cable couplers
          • 13.4 Bushings
        • 14 Verification and tests
        • 15 Type tests
          • 15.1 Tests of ability of the enclosure to withstand pressure
          • 15.2 Test for non-transmission of an internal ignition
          • 15.3 (Reserved for future use)
          • 15.4 Tests of flameproof enclosures with breathing and draining devices
        • 16 Routine tests
        • 17 Switchgear for group I
          • 17.1 Means of isolation
          • 17.2 Doors or covers
        • 18 Lampholders and Iamp caps
          • 18.1 Device preventing lamps working loose
          • 18.2 Holders and caps for lamps with cylindrical caps
          • 18.3 Holders for lamps with threaded caps
        • 19 Non-metallic enclosures and non-metallic parts of enclosures
          • 19.1 (Reserved for future use)
          • 19.2 Special constructional requirements
          • 19.3 Supplementary requirements for type tests
        • 20 Marking
          • 20.1 General
          • 20.2 Caution and warning markings
          • 20.3 Informative markings
    • Annex A(normative)Additional requirements for crimped ribbon elements and multiple screen elements of breathing and draining devices
    • Annex B (normative)Additional requirements for elements, with non-measurable paths, of breathing and draining devices
    • Annex C(normative)Additional requirements for flameproof entry devices
    • Annex D(normative) Empty flameproof enclosures as Ex components
    • Annex E(normative) Cells and batteries used in flameproof “d” enclosures
    • Annex F(informative)Mechanical properties for screws and nuts
    • Annex G(informative)Introduction of an alternative risk assessment method encompassing “equipment protection levels’ for Ex equipment
    • Bibliography