CSB presentation - Industrial Fire Journal

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Combustible Dust Testing Property Definition Application K st P max Explosion Severity (ES) Pressure Ratio (PR) Dust deflagration index (bar m/s) Maximum explosion overpressure generated in a test chamber (bar) Calculated value normalized to Pittsburgh coal dust; Class II test Calculated value; explosibility screening test Measures the relative explosion severity compared to other dusts Used to design enclosures and predict severity of the consequence Determines if Class II electrical equipment is needed Determines if a dust is explosible 28 www.csb.gov
Iron Powder Test Results Bag house #4 sample (as received) Explosible ? (Pressure Ratio Calculation) Ignitable? Result Yes Yes K st (bar m/s) 19 P max (bar) 3.5 *The <strong>CSB</strong> also conducted 1m 3 testing from a different sample with a larger particle size; this did not ignite in the 1m 3 chamber 29 www.csb.gov
Page 1 and 2: Public Meeting November 16, 2011 H
Page 3 and 4: Meeting Agenda Investigation Team
Page 6 and 7: Investigation Team Presentation Co
Page 8 and 9: Hoeganaes Gallatin, TN Facility 30
Page 10 and 11: Incident Illustration Bucket Elevat
Page 12 and 13: Bucket Elevator Flash Fire Signifi
Page 14 and 15: Hydrogen Explosion & Secondary Dust
Page 16 and 17: Incident Illustration Hydrogen Expl
Page 22 and 23: Combustible Dust Testing
Page 24 and 25: Combustible Dust Testing Iron powd
Page 26 and 27: 26 www.csb.gov
Page 30 and 31: Combustible Dust Testing Dust test
Page 32 and 33: Industry Dust Hazard Recognition M
Page 34 and 35: CSB Dust Study Data The CSB issued
Page 36 and 37: Hoeganaes Past Incidents Workers t
Page 38 and 39: Hierarchy of Controls Concept reco
Page 40 and 41: Hierarchy of Controls Inherently Sa
Page 42 and 43: Hierarchy of Controls Engineering C
Page 44 and 45: Hierarchy of Controls Engineering
Page 46 and 47: Industry Codes and Standards
Page 48 and 49: www.csb.gov CSB Combustible Dust St
Page 50 and 51: Combustible Dust NEP Not a regulat
Page 52 and 53: Tennessee OSHA (TOSHA) Tennessee o
Page 54 and 55: National Fire Protection Associatio
Page 56 and 57: NFPA 484 The authority having juri
Page 58 and 59: 58 www.csb.gov
Page 60 and 61: www.csb.gov International Fire Code
Page 62 and 63: www.csb.gov IFC Chapter 22 Combust
Page 64 and 65: IFC Chapter 22 Combustible Dust-Pr
Page 66 and 67: Key Findings
Page 68 and 69: Key Findings 3. Hoeganaes lacked em
Page 70 and 71: Key Findings 7. The Gallatin Fire D
Page 72 and 73: Key Findings 9. GKN and Hoeganaes d
Page 74 and 75: Recommendations Overview Primary t
Page 76 and 77: Staff Proposed Recommendations
Page 78 and 79:
Occupational Safety and Health Admi
Page 80 and 81:
Hoeganaes Corporation 5. Conduct pe
Page 82 and 83:
Hoeganaes Corporation 7. Implement
Page 84 and 85:
Metal Powder Producers Association
Page 86 and 87:
Gallatin Fire Department 11. Ensure
Page 88 and 89:
Board Questions
Page 90 and 91:
Panelists Dr. Paul Amyotte, P. Eng
Page 92 and 93:
Public Comment
Page 94:
Public Meeting November 16, 2011 H
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CSB presentation - Industrial Fire Journal

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