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    AS/NZS 60079.30.2:2007

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    Explosive atmospheres Electrical resistance trace heating - Application guide for design, installation and maintenance (IEC 60079-30-2, Ed. 1.0 (2007) MOD)

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  30-06-2017

    Language(s):  English

    Published date:  26-04-2007

    Publisher:  Standards Australia

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

    1 - AS/NZS 60079.30.2:2007 Explosive atmospheres Part 30.2: Electrical resistance trace heating„Application guide for design, ins
    4 - PREFACE
    5 - CONTENTS
    7 - 1 Scope
    7 - 2 Normative references
    8 - 3 Terms and definitions
    8 - 4 Application considerations
    8 - 4.1 General
    9 - 4.2 Corrosive areas
    9 - 4.3 Process temperature accuracy
    9 - 4.4 Installation considerations
    10 - 5 Thermal insulation
    10 - 5.1 General
    10 - 5.2 Selection of insulating material
    11 - 5.3 Selection of weather barrier (cladding)
    12 - 5.4 Selection of economical thickness
    13 - 5.5 Double insulation
    14 - 6 System design
    14 - 6.1 Introduction
    14 - 6.2 Purpose of, and major requirement for, trace heating
    14 - 6.3 Heat loss calculations
    16 - 6.4 Heat-up considerations
    17 - 6.5 Heat-loss design safety factor
    17 - 6.6 Selection of trace heater
    21 - 6.7 Maximum temperature determination
    24 - 6.8 Design information
    25 - 6.9 Power system
    25 - 6.10 Start-up at low ambient temperatures
    25 - 6.11 Long trace heater runs
    25 - 6.12 Flow pattern analysis
    27 - 6.13 Dead-leg control technique
    27 - 6.14 Chimney effect
    28 - 7 Control and monitoring
    28 - 7.1 General
    28 - 7.2 Mechanical controllers
    28 - 7.3 Electronic controllers
    28 - 7.4 Application suitability
    29 - 7.5 Location of controllers
    29 - 7.6 Location of sensors
    30 - 7.7 Alarm considerations
    31 - 8 Recommendations for installation
    31 - 8.1 Introduction
    31 - 8.2 Preparatory work
    32 - 8.3 Installation of trace heating circuits
    38 - 8.4 Installation of control and monitoring equipment
    42 - 8.5 Installation of thermal insulation system (see also Clause 5)
    44 - 8.6 Installation of distribution wiring and coordination with branch circuits
    44 - 8.7 Commissioning
    46 - 9 Maintenance
    46 - 9.1 General
    46 - 9.2 Fault location
    46 - 9.3 Fault rectification
    46 - 10 Repairs
    46 - 10.1 General
    47 - 10.2 Practicability of repair to electric trace heaters
    47 - 10.3 Repair techniques for electrical trace heaters
    48 - 10.4 Earthing
    48 - 10.5 Testing
    51 - Annex ZZ (normative) Variations to IEC 60079-30-2, Ed.1.0 (2007) for application in Australia and New Zealand

    Abstract - (Show below) - (Hide below)

    Provides guidance for the application of electrical resistance trace heating systems in areas where explosive gas atmospheres may be present, with the exception of those classified in zone 0. It provides recommendations for the design, installation, maintenance and repair of trace heating equipment and associated control and monitoring equipment. It does not cover devices that operate by induction heating, skin effect heating or direct pipeline heating, not those intended for stress relieving.

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

    Committee EL-014
    Document Type Standard
    Publisher Standards Australia
    Status Superseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published as AS/NZS 62086.2:2002.Revised and redesignated as AS/NZS 60079.30.2:2007. Originated as AS/NZS 62086.2:2002. Revised and redesignated as AS/NZS 60079.30.2:2007.

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

    AS/NZS 2430.3.3:2004 Classification of hazardous areas Examples of area classification - Flammable liquids
    AS/NZS 60079.10:2004 Electrical apparatus for explosive gas atmospheres Classification of hazardous areas (IEC 60079-10:2002 MOD)
    AS/NZS 2430.3.9:2004 Classification of hazardous areas Examples of area classification - Miscellaneous
    AS/NZS 2430.3.7:2004 Classification of hazardous areas Examples of area classification - Landfill gas, sewage treatment and sewage pumping plants
    AS/NZS 60079.1:2005 Electrical apparatus for explosive gas atmospheres Flameproof enclosures 'd'
    AS/NZS 2381.1:2005 Electrical equipment for explosive gas atmospheres - Selection, installation and maintenance - General requirements
    AS/NZS 2430.3.1:2004 Classification of hazardous areas Examples of area classification - General
    AS/NZS 2430.3.8:2004 Classification of hazardous areas Examples of area classification - Surface coatings and adhesives
    AS/NZS 2430.3.6:2004 Classification of hazardous areas Examples of area classification - Laboratories, including fume cupboards and flammable medical agents
    AS/NZS 60079.0:2005 Electrical apparatus for explosive gas atmospheres General requirements
    AS/NZS 60079.30.1:2007 Explosive atmospheres Electrical resistance trace heating - General and testing requirements
    AS/NZS 60079.7:2006 Explosive atmospheres Equipment protection by increased safety 'e'
    AS/NZS 2430.3.2:2004 Classification of hazardous areas - Examples of area classification - Vehicle workshops, vehicle parking, fuel dispensing stations and aircraft hangars
    AS/NZS 2430.3.5:2004 Classification of hazardous areas Examples of area classification - Refineries and major processing plants
    AS/NZS 2430.3.4:2004 Classification of hazardous areas - Examples of area classification - Flammable gases

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

    AS 4647-2011 Diaphragm gas meters
    AS/NZS 60335.2.11:2009 Household and similar electrical appliances - Safety Particular requirements for tumble dryers (IEC 60335-2-11 Ed 7.1, MOD)
    AS/NZS 60079.33:2012 Explosive atmospheres Equipment protection by special protection 's'
    AS/NZS 3004.2:2008 Electrical installations - Marinas and recreational boats Recreational boats installations
    HB 239:2011 Guidance on the repair and overhaul of electrical equipment for explosive atmospheres
    AS/NZS 5026:2012 The storage and handling of Class 4 dangerous goods
    HB 13-2007 Electrical equipment for hazardous areas
    AS/NZS 60079.30.1:2007 Explosive atmospheres Electrical resistance trace heating - General and testing requirements
    AS ISO 21789:2014 Gas turbine applications - Safety
    AS/NZS 4871.3:2010 Electrical equipment for mines and quarries Substations
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