Dust Explosion Classifications

Combustible Dust Policy InstituteCombustible Dust Policy Institute

Photo: CSB

Don’t Be MisleadDust Explosion Classes (St 1, St 2, St 3)

Imperial Sugar Refinery

Dust explosionclass

Kst (bar.m/s) Characteristic Material

St 0 0 No explosion Silica

St 1 >0 and <=200 Weak

explosion

Powdered milk,charcoal, sulfur,

sugar & zinc

St 2 >200 and <=300

Strong explosion

Wood Flour

St 3 >300 Very Strong explosion

Aluminum, & Magnesium

Dust Explosion Classes

A Weak Explosion? St 1

SUGAR DUST EXPLOSION14 Killed, 36 Injured

Imperial Sugar Refinery PORT WENTWORTH, GEORGIA FEBRUARY 7, 2008

Photo: CSB

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