Proposed Strawman Method

Part of the SpringerBriefs in Fire book series (BRIEFSFIRE)


Recently, the Committee responsible for NFPA 654 came up with two new consensus criteria for determining that a compartment is a dust explosion hazard: one aimed at mitigation of burn injuries, and the other for room/building collapse prevention. As described in Rodgers and Ural (2010), the criteria are based on maximum allowable airborne combustible dust mass. Both formulas rely on an empirical entrainment fraction, ηD, representing the fraction of dust accumulations that can become airborne during an accident. After much discussion, the Committee selected a value of ηD = 0.25 which offers the same level of protection NFPA 654-2006 does for typical occupancies, pending the outcome of this Research Foundation sponsored project.


Blast Wave Free Stream Velocity Dust Deposit Dust Layer Dust Collector 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. ASHRAE (2005), “Space Air Diffusion,” 2005 ASHRAE Handbook Fundamentals, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Chapter 33.Google Scholar
  2. Cashdollar K L, Sapko M J, Weiss E S, Harris M L, Man C, Harteis S P, and Green G M (2010). Recommendations for a new rock dusting standard to prevent coal dust explosions in intake airways, NIOSH, RI 9679, 49 pp.Google Scholar
  3. CCPS (2010) Guidelines for Vapor Cloud Explosion, Pressure Vessel Burst, BLEVE and Flash Fire Hazards, Wiley, section 7.4.Google Scholar
  4. Harris, M. L. (2010), Private Communication, Pittsburgh Research Center, NIOSH.Google Scholar
  5. Harris, M L, Cashdollar, K L, Man, C, and Thimons E (2009). Mitigating coal dust explosions in modern underground coal mines, in Proceedings of the 9th International Mine Ventilation Congress, 8 pp (New Delhi, India, November 10–13, 2009).Google Scholar
  6. Kalman, Haim, Andrei Satran, Dikla Meir, Evgeny Rabinovich (2005), “Pickup (Critical) Velocity Of Particles,” Powder Technology, 160, pp. 103–113.CrossRefGoogle Scholar
  7. Rodgers, S.A. and Ural, E.A. (2010), “Practical Issues with Marginally Explosible Dusts - Evaluating the Real Hazard,” Accepted for publication in the Process Safety Progress.Google Scholar
  8. Tamanini, F. (1983), “Dust Explosion Propagation in Simulated Grain Conveyor Galleries,” FMRC Technical Report, J.I. OF1R2.RK, July 1983.Google Scholar

Copyright information

© Fire Protection Research Foundation 2011

Authors and Affiliations

  1. 1.Loss Prevention Science and Technologies, Inc.StoughtonUSA

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