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Dust ExplosionsDust Explosions

Tim Myers, Ph.D., P.E.Exponent, Inc.

9 Strathmore RoadNatick, MA 0!"0

tmyers#exponent.com$%0&' "%()&%!(

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Recent Catastrophic Dust ExplosionsRecent Catastrophic Dust Explosions

*ear +aciity State D-st +ataities

999 ray Iron /astin+o-ndry

Massach-setts Phenoic Resin 1

(00( R-22er Recycin+aciity

Mississippi Scrap Tirerindins

%

(001 R-22er Dr-Dei3ery Prod-cts

North /aroina PoyethyeneD-st

"

(001 +i2erassIns-ation Pant

4ent-cky Phenoic Resin !

(001 A-tomoti3e 5hee+o-ndry Indiana A-min-m D-st

(00& S-ar Re6inery eoria S-ar 7

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So-rce8 A6ter Eckho66, D-st Exposions in the Process Ind-stries $(001'.

Effect of Particle Size on

Combustion Rate

Effect of Particle Size on

Combustion Rate

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Elements of a Dust ExplosionElements of a Dust Explosion

•

/om2-sti2e d-st – Sma partice sie

 – :xidia2e

•

:xidier $e.. air'• Inition so-rce

• Dispersion o6 d-st

• /on6inement

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So-rce8 /S; /om2-sti2e D-st

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!S"# Dust Explosion "azar$ Re%ulations!S"# Dust Explosion "azar$ Re%ulations

• :S

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!S"# Combustible Dust &ational Emphasis

Pro%ram

!S"# Combustible Dust &ational Emphasis

Pro%ram

•

E66ecti3e :cto2er &, (00! – Reiss-ed March , (00&

• Identi6ied" ind-stry codes @ith Cmore 6re-entandor

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Stan$ar$s for the Pre'ention of Dust (ires

an$ Explosions

Stan$ar$s for the Pre'ention of Dust (ires

an$ Explosions

• N+PA " Standard for the Prevention of Fires and Dust Explosions in Agricultural and Food Processing Facilities

• N+PA (0 Standard for Fire Prevention and Control in Coal Mines 

• N+PA 7&7 Standard for Combustible Metals 

• N+PA "%7 Standard for the Prevention of Fire and Dust Explosions fromthe Manufacturing, Processing, and Handling of Combustible ParticulateSolids 

• N+PA "%% Standard for the Prevention of Sulfur Fires and Explosions

•

N+PA ""7 Standard of Fires and Explosions in ood Processing andood!or"ing Facilities

• N+PA &%0 #ecommended Practice for Fire Protection for Electric$enerating Plants and High %oltage Direct Current Converter Stations

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Summar)Summar)

• Recent catastrophic d-st exposions ha3e paced an increased

emphasis on the pre3ention and mitiation o6 d-st exposions.

• In response to /S; recommendations, :S