Combustible Dust Training Institute — Incident Breakdown

Learn From a Real Explosion: What Happens When Isolation Systems Fail in a Wheat Mill

A detailed incident breakdown course examining a real combustible dust explosion at a wheat milling facility — covering explosion isolation failures, propagation pathways, and the critical lessons every safety professional needs to know.

Led by Chris Cloney, PhD., PEng.

~31 Minutes of Training

8 Lessons + Assessment

Certificate of Completion Included

3 months access • Instant start

Save 40% — Limited Time

$299 $499

You save $200 USD

✓ 8 Expert-Led Video Lessons
✓ Full Incident Timeline & Root Cause Analysis
✓ Explosion Isolation System Review
✓ Lessons Learned & Prevention Strategies
✓ Final Assessment Quiz
✓ Certificate of Completion
✓ 3 Months Course Access

Secure checkout • Instant access

Questions? support@dustsafetyscience.com

The Risk Is Real

Do You Know What Happens When Explosion Isolation Fails?

Explosion isolation systems are a critical line of defense in combustible dust facilities — but when they are absent, improperly specified, or poorly maintained, a localized ignition event can rapidly propagate through connected equipment and ductwork, turning a manageable incident into a facility-wide catastrophe. Wheat milling operations present a particularly high-risk environment: fine combustible dust, high-energy process equipment, and interconnected conveying systems create conditions where isolation failures have devastating consequences.

This incident breakdown course walks you through a real wheat mill explosion in detail — from the initial ignition event through the propagation sequence to the final outcome — so you can identify and close the same vulnerabilities in your own facility.

What You Will Gain

Lessons You Can Apply at Your Own Facility

Understand the Incident

Walk through the real sequence of events at the wheat mill — from the choked attrition mill and smouldering restart through the deflagration, propagation into the dust collector, and the final outcome.

Apply Root Cause Analysis

Identify the immediate, contributing, and root causes of the explosion and understand how the failure to restore safe operating conditions after smouldering set the stage for the incident.

Evaluate Isolation Options

Compare active and passive explosion isolation technologies — chemical barriers, fast-acting mechanical valves, passive float valves, flap valves, and rotary valves — against NFPA 61 and NFPA 69 requirements.

Execute Safe Mill Cleanout

Follow the correct step-by-step procedures for cleaning out milling equipment after a fire or explosion — including area preparation, residual material removal, inspection, and pre-startup safety checks.

Course Curriculum

Inside the Incident Breakdown

Eight focused lessons walk you through the incident from start to finish — covering root causes, isolation system failures, post-explosion procedures, and prevention strategies.

Investigation Background

Introduction to the wheat mill incident — facility context, the research paper source, and the process diagram showing the flame propagation path.

Incident Breakdown

Step-by-step walkthrough of the explosion sequence: choked attrition mill, smouldering restart, deflagration observed, propagation through the cyclone into the filter, and rupture of deflagration vents and access hatch.

Root Cause Analysis

Immediate cause (undersized dust collection venting), contributing cause (explosion propagated unisolated into the dust collector), and root cause (failure to restore safe operating conditions after smouldering).

Understanding Explosion Isolation

Why isolation is required: the three acceleration mechanisms — pressure piling, flame acceleration, and turbulence generation — that make connected-equipment explosions far more severe than single-vessel events.

Explosion Isolation Options

NFPA 61 requirements, NFPA 69 options, and a pros-and-cons comparison of active systems (chemical barriers, fast-acting mechanical valves, pinch valves) and passive systems (float valves, flap valves, rotary valves).

Considerations for Mill Cleanout

Safe step-by-step procedures: area preparation, thorough removal of residual material from mill enclosures, screens, discs, air intake and exhaust; inspection of bearings, hot spots, and ventilation systems; and pre-startup safety checks including thermal camera use.

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Certificate of Completion

Complete all lessons and pass the final assessment to earn your certificate of completion, awarded through the Dust Safety Academy platform.

Meet Your Instructor

Learn From Industry-Leading Experts

Lead Instructor & Incident Analyst

Chris Cloney, PhD., PEng.

Managing Director, Dust Safety Science • Co-Founder, CDTI

Chris Cloney has an undergraduate degree in mechanical engineering and a PhD in chemical engineering studying the physics and chemistry of dust explosions. Over the past decade he has worked with hundreds of companies and safety professionals around the world, sharing dust safety lessons through podcasts, webinars, and in-person training programs. He is the founder of Dust Safety Science and co-founder of the Combustible Dust Training Institute.

Co-Instructor

Michelle Murphy, M.S., CCPSC

President, Mica LLC • Co-Founder, CDTI

Michelle Murphy is a seasoned chemical engineer and process safety expert with over 25 years of consulting experience. She founded Mica, LLC to help manufacturing facilities identify and manage combustible dust and reactive chemical hazards. Her expertise spans dust hazard analysis, combustible dust testing, process safety program development, and emergency relief system design across food, agriculture, chemicals, metals, and pharmaceuticals. Michelle holds an M.S. in chemical engineering from Clarkson University and is a Certified Process Safety Professional (CCPS).

Why CDTI

World-Class Training Built on 35+ Years of Real-World Expertise

Expert-Led Training

Our instructors have over 35 years of experience in industrial safety, consulting for leading safety organizations and contributing directly to NFPA and OSHA standards development.

Practical and Actionable

Our training goes beyond theory to deliver practical solutions you can implement immediately. Learn to identify hazards and protect your facility with real-world strategies that work.

Trusted by Industry Leaders

CDTI training has been trusted by companies in manufacturing, grain, chemical, and energy sectors to reduce risk and ensure compliance. Join the ranks of professionals protecting their teams.

Evidence-Based Curriculum

Every lesson is rooted in peer-reviewed research, global incident data, and 35+ years of combined real-world expertise — not outdated textbooks or generic safety content.

3 Months Access

Enroll once and get 3 months of access to all course materials. Return to review lessons, reference calculations, and stay current with evolving safety standards at your own pace.

Who This Course Is For

Essential Training for Grain, Milling, and Food Processing Professionals

EHS ManagersProcess Safety EngineersPlant ManagersGrain & Milling Facility OperatorsMaintenance SupervisorsDHA ConsultantsFire Protection EngineersInsurance Risk Engineers

Enroll Today

Everything Included in the Course

Save 40% — Limited Time Offer

$499.00 USD

$299

You save $200 — Enroll before this offer expires

✓ 8 Expert-Led Video Lessons
✓ Full Incident Timeline & Root Cause Analysis
✓ Explosion Isolation System Review
✓ Post-Explosion Cleaning Procedures
✓ Lessons Learned Checklist
✓ Final Assessment Quiz
✓ Certificate of Completion
✓ 3 Months Full Course Access

Trusted by safety professionals in grain, milling, food processing, and manufacturing sectors worldwide.