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Overcoming Issues in IECEx Procedures and Technical Assessments

Explore common problems faced by ExCBs and ExTLs, strategies to address challenges, key areas of difficulty, and guidance on applying IECEx procedures effectively. Learn about technical issues, compliance with ISO/IEC standards, and practical solutions.

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Overcoming Issues in IECEx Procedures and Technical Assessments

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  1. Feedback from assessments of ExCBs and ExTLs – Areas where difficulties are experienced Jim Munro Chairman IECEx Panel of Assessors

  2. Scope of presentation • This training session will: • Look at some common problems and how to overcome or avoid them • Discuss IECEx and other documents ExCBs and ExTLs need to consider • Discuss some of the approaches that can be used to help bodies be accepted

  3. Problems?

  4. Types of issues/problems • Applying IECEx Procedures • System issues related to ISO/IEC Guide 65 and 17025 • Technical issues • Other Issues

  5. Applying IECEx Procedures - ExCB • IECEx 02 IECEx Scheme rules of procedure • OD/003 IECEx Assessment procedures • OD/005 Quality System requirements for manufacturers • OD/009 Issuing of CoCs, ExTRs and QARs • ExMC/161/CD Management of assessment and surveillance programs for manufacturers • OD/017 Drawing and documentation guidance • Other ODs

  6. Applying IECEx Procedures –ExTL • IECEx 02 IECEx Scheme rules of procedure • OD/003 IECEx Assessment procedures • IECEx Operational Document OD/009 Issuing of CoCs, ExTRs and QARs • Other ODs • IECEx Technical Guidance Documents (TGDs) • ExTAG Decision Sheets

  7. Applying IECEx Procedures - • Use of data, subcontracting and off site testing • New OD024V1 Use of ‘Other Testing Laboratories’ • A Manufacturer Testing Laboratory • An End-User Testing Laboratory • For third party laboratories - hierarchy: • IECEx • IECEE • Local accreditation • No accreditation • Assessment and Control

  8. Applying IECEx Procedures - • Appeals – to IECEx • Manufacturing surveillance • Adjustment where local system is different (not a Type 5 Scheme) • Ensuring QARs are issued • ExTRs • Blanks in completed ExTRs • Lack of supporting data • Referencing to ATEX component certificates – see Decision Sheets 2004/006 and 2006/002

  9. Applying IECEx Procedures - • Clear delineation of responsibilities of people within ExCB and ExTL, including: • Who makes certification decision • Who signs what • Deputies where necessary

  10. Guide 65 and 17025 • Using uncontrolled pieces of paper: • For recording results • For useful data such as conversion lookup tables • Capturing and retaining original data • Internal audits - Not always done to schedule • Calibration • Instruments not in calibration • Extending calibration periods

  11. Technical Issues • Technical issues related to: • Equipment • Procedures • Competency

  12. Technical Issues –IP Testing • Dust testing – keeping dust in circulation • Humidity - heating • Vibrators – rappers – hoses • Slope of hoppers • Viewing windows • Water testing – • Temperature differential - control temperature or use of pressure balance • Nozzle calibration

  13. Technical Issues –Intrinsic Safety • Intrinsic safety assessment • Lack of guidance material • OD021V2 • Spark test apparatus • Inductors and capacitors • Temperature classification • Measurement • Assessment • Small component ignition

  14. Technical Issues – Flameprooof • Flameproof pressure determination systems • Understanding • Calibration approaches • Gas measurement

  15. Technical Issues – Temperature Measurement • Lack of attention to measurement techniques • Thermocouple and system calibration • Thermocouple attachment • Hot spot location

  16. General issues • Use of latest 17025 – 1 June 2007 • Unusual test equipment • Accreditation • Use of pre-assessments

  17. Conclusion • Despite the seeming long list of issues here – everyone seems to get there in the end!

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