neil dennis - aecom - the development of standards for hazardous areas
DESCRIPTION
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: http://www.informa.com.au/dust14TRANSCRIPT
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Neil Dennis
Development of Standards for Dust Hazardous Areas
Dust Explosions Conference – June 2014
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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
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Key Relationships
Your Plant
Legend
Regulatory
Formal
Informal
Non Existent
Developing
Plus USA
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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
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Principle Standards ‘Road Map’
2011/12 2005
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
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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
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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°C IIIA
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
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Installation Standards ‘Road Map’
2009 2005
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?
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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????
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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.
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• 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
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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
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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
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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
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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
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IEC SC31M – Development Path
Development Phase
Publication/Implementation
19
93
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
20
07
20
08
20
09
20
10
20
11
20
12
20
13
20
14
20
15
20
16
20
17
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
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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
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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
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Basic ATEX ‘Mechanics
ATEX marking and conformity assessment for mechanical components and assemblies with no electrical components
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Change Influences
• Standards bodies
- European, Australian, US
• Trade
- Sourced in Europe
- Sold to Europe
• Market Expectations
- Regulatory drivers
- User opinions
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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
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Non Electrical - relationships
• Consider impact on/input from, existing recognised standards
• Certification schemes?
- Extension to IECEx
• New competencies and inspection regimes?
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Going Forward
• Change is happening – be prepared and consider the issues
• Communicate and put your views forward
• Participation and Funding are needed
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He that will not apply new remedies must expect new evils for time is the greatest
innovator
Francis Bacon (1561-1626)
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Key Relationships
Your Plant
Legend
Regulatory
Formal
Informal
Non Existent
Developing
Plus USA
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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.
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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 [email protected]