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’

2011/12 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

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°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

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?

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

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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 neil.dennis@aecom.com