e-DHA 204: Introduction & Workshop to Dust Hazards Analysis (DHA)

COURSE DESCRIPTION                                                                                 DURATION: 7 hours on TalentLMS and one day of LIVE workshop with PSRG Trainer

Introduction: The course provides a detailed procedure to conduct either a risk-based dust hazard analysis or prescriptive dust hazard analysis. A brief background introduction is covered along with knowing combustible dust physical and chemical properties, combustible dust hazards, and applicable regulations/codes/standards for dust hazards controlling. Combustible hazards protection is another section provided in this course based on process design, equipment selection, building construction, ignition source control, and dust hazards management. Participants will learn to utilize engineering controls to prevent and mitigate combustible dust hazards.

Workshop: In this course, the participants will learn how to conduct and document a risk-based DHA, which including, at least, P&ID/PFD noding, identification of all potential dust hazardous scenarios, estimation of the hazardous scenario severity and likelihood, risk ranking, and safeguards analysis. This course will be completely hands-on except a brief reminder of risk-based DHA methodology as the workshop progresses.

Course Benefits

  • Learn to understand dust properties and different types of dust hazards
  • Learn to know OSHA issued combustible dust regulations and combustible dust standard. 
  • Learn risk-based dust hazard analysis or prescriptive dust hazard analysis
  • Learn engineering controls to prevent and mitigate combustible dust hazards
  • How to comply with NFPA 652 for a successful DHA
  • Learn how to implement a risk-based DHA (step-by-step)
  • Learn how to document a risk-based DHA

Who Should Attend

  • Plant process safety manager and coordinator
  • Process engineers and safety engineers with dust-involved tasks
  • Professionals interested in learning dust hazard analysis
  • DHA facilitators/scribes

Course Content and Agenda

  • Introduction to combustible dust hazards
  • Regulations and standards on dust hazards control
  • Combustible dust hazard parameters and testing
  • Know dust fire and explosion severity
  • Ignition sources for dust fire/explosion
  • Introduction to dust hazard analysis
  • Prescriptive dust hazard analysis (DHA)
  • Risk-based dust hazard analysis (DHA)
  • Dust explosion protection
  • Classification of locations
  • Dust fire/explosion Ignition source control
  • Housekeeping


  • Introduction and Course Objectives
  • NFPA 652 compliance for a successful DHA
  • Review of the procedures to implement a risk-based DHA

Workshop #1

  • Node P&IDs/PFDs
  • Define the initiating events

Workshop #2

  • Estimate hazardous scenario consequence and severity
  • Estimate initiating event frequency
  • Apply conditional modifiers
  • Conduct risk ranking
  • Analyze safeguards and assign credits to each of applicable safeguards
  • Make recommendations