PowerPoint-presentatie

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ATEX manager Development of a web-based tool to
support companies in controlling explosion
risks Henri Heussen Dook Noy
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Introduction

• VAST programme (Ministry of Social Affairs)
• Goal reinforcement of working conditions in
• SMEs with regard to hazardous substances
• Key elements
• creating awareness
• improvement of communication in the chain
• development of supporting tools
• Stoffenmanager generic web-based tool for risk
  prioritization (www.stoffenmanager.nl)
• 2th stage development of branche specific
  versions of Stoffenmanager and additional modules
  gt ATEX manager
• Developed by Arbo Unie, BECO group and TNO

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ATEX manager

• Starting point guidelines for controlling
• explosion risks in the animal fodder
• industry
• Conversion to web-based specific tool for
• animal fodder industry
• Development of generic tool for SMEs
• Modules
• Quick Scan explosion hazards (applicability ATEX
  guidelines)
• Data entry materials, process equipment,
  production locations
• Classification of hazardous areas into zones
  (combustible dusts/flammable gases/vapours/mists)
• Evaluation of ignition risks
• Generation of Explosion Protection Documents

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Quick Scan combustible dusts
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Data entry materials

• Large set of parameters
• Combustible dusts
• Lower Explosion Limit (LEL)
• Minimum Ignition Temperature cloud (IT)
• Minimum Ignition Temperature layer (GT)
• Mimimum Ignition Energy (MIE)
• Maximum Rate of Explosion Pressure Rise
  (dp/dt)max
• Kst ( (dp/dt)max ,volume dependent)
• Dust Explosion Class (based on Kst)
• Flammability (BZ)
• Particle size
• Limiting Oxygen Concentration (LOC)
• Optional future development explosion hazard
  banding based on parameters like
• Ignition temperatures and energy, flammability
• Dust Explosion Class

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Zoning (dust cloud)
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Evaluation of ignition risks
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Risk bands

• A high risk
• B substantial risk
• C limited risk
• D low risk

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Control banding?
Hazard bands
Ignition sources
Ignition/combustion characteristics
Explosion characteristics
Explosion triangle
Control bands
Flammable substances
O2

• Prevention
• ignition sources gt technical measures
• gt organ. measures
• inerting gt limiting oxygen
• - combustible/flammable materialsgt product
  elimination
• gt product modification

• Protective/corrective
• - explosion relief
• explosion suppression
• explosion resistant design

Higher hazard ignition band
Higher hazard explosion band
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THANK YOU!