Neil Dennis - AECOM - The development of standards for hazardous areas
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Neil Dennis - AECOM - The development of standards for hazardous areas



Neil Dennis delivered the presentation at the 2014 Dust Explosions Conference. ...

Neil Dennis delivered the presentation at the 2014 Dust Explosions Conference.

The 2014 Dust Explosions Conference examined industrial hazards, the means to control or eliminate dust and analysed the latest technology to ensure the maximum protection and safety of organizations. The event also featured recent industrial case studies and new safety recommendations.

For more information about the event, please visit:



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Neil Dennis - AECOM - The development of standards for hazardous areas Neil Dennis - AECOM - The development of standards for hazardous areas Presentation Transcript

  • Neil Dennis Development of Standards for Dust Hazardous Areas Dust Explosions Conference – June 2014
  • Topics • Australian Standards Framework • Update on Australian Standards and forecast • ATEX background • IEC Developments • ISO/IEC Non Electrical developments • Issues for Dusts Remember: Nothing in standards is retrospective
  • Key Relationships Your Plant Legend Regulatory Formal Informal Non Existent Developing Plus USA
  • Regulatory Frameworks Electricity Act and Regulations OH&S, D Goods acts and Regulations AS/NZS 3000 AS/NZS 60079-14 Installation – Electrical AS/NZS 60079-10-2 Classification of dust hazardous areas Designers Importers/suppliers End owners Detail requirements - Principles - Duty of care - Responsibilities of parties Inspection of installations before energisation Mandatory in some states Competencies, Documentation, Maintenance etc. AS/NZS 4745 Other best practice
  • Principle Standards ‘Road Map’ 2011/122005 AS/NZS (IEC) 61241.10 AS/NZS 4745 Classification of hazardous areas Code of Practice AS/NZS 60079-10-2 “Endorsed” by AS/NZS 3000 amendment 2- 2012 IEC 60079-10-2 2014 2015 AS/NZS (IEC) 60079-10-2 AS/NZS 60079- 10-2 AS/NZS 4745
  • AS/NZS 4745:2012 CoP for Dusts • No changes other than corrections and updates to references AS/NZS 60079-10-2:2012 - Hazardous Areas • Emphasis on dust cloud hazard. – Less on layers • Introduce dust groups;  IIIA (flyings)  IIIB (non conductive)  IIIC (conductive) Future • Provide guidance on hybrid mixtures • Modify definition of combustible dust – slightly • Introduce competency for personnel (match 60079-10-1) • Remove ‘suggested’ criteria for extent of zones and adequate housekeeping in examples Principle Standards - Detail
  • Db EPL – Quick test Ex ia Explosion Protected Temp Class or Maximum Temperature Max Temp at Dust Depth noted Risk Category D – Dust Dust Group T225°C T500 320°CIIIA Additional marking added for risk assessment and hazard type Example Protection Technique Zone 20 Zone 21 EPL rating can be different to the ‘normal protection rating’ where other factors are relevant. Users need to follow the lower of both ratings
  • Installation Standards ‘Road Map’ 20092005 AS/NZS 61241.14 - Dust AS/NZS 2381.1- Gas AS/NZS (IEC) 60079-14 (IEC with amendments) AS/NZS (IEC) 60079-17 Selection & Installation Inspections & Maintenance AS/NZS 60079-14 and 17 “Endorsed” by AS/NZS 3000 amendment 2- 2012 IEC 60079-14 IEC 60079-17 2013 2015 AS/NZS (IEC) 60079-14 (IEC with amendments) AS/NZS (IEC) 60079-17 AS/NZS 60079- 25 I.S. Systems AS/NZS 60079- 25 I.S. Systems 2020?
  • Installation Standards – Detail for Dusts 2015 • Significant change in document structure • ANZ version to correct some detail lost in IEC version • Otherwise ‘cosmetic changes’ • Delete acceptance of AUSEx scheme (and prior) for new installations e.g. DIP Future • Consider longer term criteria for acceptance of items to old standards • Further document restructure????
  • Standards Australia Development • Standards Australia now requires a ‘project proposal’ to be approved for ALL standards work • Currently approved for the entire ‘hazardous area suite’ for work in IEC but 2 yearly ‘reconfirmation’ applies • AS/NZS adoptions require INDIVIDUAL project approvals. (Twice yearly timetable). • Project submissions must be supported by a range of stakeholders • Committees need suitable, long term, younger, members • Funding changes for international participation could put influence at risk.
  • • Atmospherique EXplosive (French) • Generalised directive to manage ignition risks for hazardous areas • European Union ‘regulation’ issue: Mandated through European member country legislation - Risk based (Risk categories introduced - Cat 1, Cat 2, Cat 3) - Address electrical and non electrical issues • Compliance to Standards deemed to meet objectives but not the only path - Not a certification scheme - Initially based on preferred acceptance of CEN and CENELEC standards but Accepts Alternative Standards (IEC) ATEX Principles – 1994/2003
  • ATEX Principles – 2014/2016 • EU Directive 2014/34/EU • Place ‘clear and proportionate’ obligations on all parties in the supply chain – (aligns Australian OHS model regulations) - Manufacturers - Importers - Distributors • Identifies new and second hand items from third countries (outside EU) • Includes all related safety devices and components, even outside the hazardous area • Enhances many details from previous directive to address ‘issues’ and improve systems such as accreditation of Notified Bodies
  • IEC TC31 – Nominal Numbers EU - 15 Other European - 8 Others - 9 ANZ - 2 USA - 1 EU - 445 Other European - 65 Australia/NZ - 50 USA - 109 Others - 77 USA ANZ UK Germany Participation can balance power Interest groups in descending order - Test/Certification - Manufacturers - End users/Consultants - Dust end users = Not enough 50% European Voting ‘Team’ Positions Chairs
  • IEC TC31 Scope change 2003 - 2008 Hazardous area standards relating to the use of electrical apparatus including area classification. From 2008 Hazardous area standards relating to equipment. A joint ISO/IEC initiative
  • TC-31 Structure TC 31 – Hazardous Areas Chairman’s Advisory Group SC31G Intrinsic Safety SC31J Installation & Classification SC31M Non Electrical MT 60079-1 PT or WG WG 27 Motors WG 28 Dusts WG 31 Gas/Dust Mixtures Specialist Working Groups Standards Development and Maintenance Teams Field Sub Committees Typical Structure Only Policy and Management MT 60079-10-2 MT 60079-14 MT 60079-17 Topic WG
  • IEC SC31M – Development Path Development Phase Publication/Implementation 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 EN 13463-1 GENERAL REQUIREMENTS ATEX Directive EN 13463-3 FLAMEPROOF EN13463-2 RESTRICTED BREATHING EN 13463-5 CONSTRUCTION SAFETY IEC 80079-34 IEC TC31 SCOPE - ELECTRICAL ISO/IEC TC31 SCOPE - NON ELECTRICAL EN 13463-8 IMMERSION EN 13463-6 IGNITION CONTROL IEC 80079-XX IEC 80079-38 IEC 80079-37 IEC 80079-36 ISO/IEC non electrical standards EN non electrical standards Development Pathway ISO/IEC 80079-34: Quality Systems (Elect and Mech) ISO/IEC 80079-36: Basic requirements ISO/IEC 80079-37: Immersion, Construction and Ignition control ISO/IEC 80079-38: Underground Coal Mining ISO/IEC 80079-xx: Other Subjects – could be several IEC 60079-xx
  • IEC TC31 Developments Other subjects identified for development - Protective systems (dusts) – venting and suppression • Suspended due to lack of interest from USA (but could be re-established in the future) - Combustion engines, including dust hazards - scoping stage - Dust Vacuum cleaners – 2nd draft - Mechanical Installation – scoping stage - Safety Devices associated with Ex protection • Already at 2nd Draft • Major issues – SILs matched to Zone, Application to all safety system related components (sensors, CPUs, power supplies etc.), Marking for all components. • Still trying to ‘get a right balance’. ATEX is a driver for many items being raised
  • IEC – Non Electrical – Structure Beginning with adoption/modification/restructure of EN standards - Started work on a range of documents IEC 60079-0: general requirements – mechanical and electrical ISO/IEC 80079-36: Basic requirements for mechanical equipment (including ignition hazard assessment) ISO/IEC 80079-37: Mechanical equipment – constructional safety, control of ignition sources, liquid immersion (combined elements from EN standards) IEC 60079-1: Flameproof – mechanical and electrical IEC 60079-2: Pressurisation – mechanical and electrical And - for example Extending to other subjects in the future – E.g. combustion engines
  • Basic ATEX ‘Mechanics ATEX marking and conformity assessment for mechanical components and assemblies with no electrical components
  • Change Influences • Standards bodies - European, Australian, US • Trade - Sourced in Europe - Sold to Europe • Market Expectations - Regulatory drivers - User opinions
  • Dust Impacts • Many unique or specialised items of mechanical equipment • Conveyors, bucket elevators, grading and sieves, mills, bagging machines, etc. • Many mechanical items need safety controls to prevent heating/sparks • Even more could be identified under the new standards Put all of this presentation together to assess industry impact
  • Non Electrical - relationships • Consider impact on/input from, existing recognised standards • Certification schemes? - Extension to IECEx • New competencies and inspection regimes?
  • Going Forward • Change is happening – be prepared and consider the issues • Communicate and put your views forward • Participation and Funding are needed
  • He that will not apply new remedies must expect new evils for time is the greatest innovator Francis Bacon (1561-1626)
  • Key Relationships Your Plant Legend Regulatory Formal Informal Non Existent Developing Plus USA
  • Disclaimer The contents of this presentation present only a synopsis of issues, many of which may be subject to changes in the future. Information in the slides needs to be taken in context with the presenter’s discussion. Accordingly no warranty is expressed or liability accepted from the use of this material. Copyright AECOM Australia Pty Ltd.
  • Development of Standards for Dust Hazardous Areas Dust Explosions Conference – June 2014 NEIL DENNIS Technical Director AECOM Australia Pty Ltd Level 9, 8 Exhibition Street, Melbourne VIC 3000 (03) 9653 1234