(54bx) Analysis of Combustible Dust Flash Fires on Personal Protective Equipment Fabrics
AIChE Spring Meeting and Global Congress on Process Safety
Monday, April 23, 2018 - 5:00pm to 7:00pm
In addition to radiative heat transfer from the flame, combustible dust flash fires also produce high-temperature solid particles that may adhere to fabrics and produce significant and prolonged heat transfer to the garment. While this additional heat transfer unique to combustible dust flash fires may be significant, the prescriptive performance requirements of PPE fabrics required by standards are based primarily on flammable gas-fueled flash fires, and have not been thoroughly evaluated for combustible dust flash fires. Therefore, these standards may not be directly applicable.
In this study, in an effort to analyze the additional hazards that combustible dusts flash fires pose on PPE fabrics, various PPE fabrics are exposed to combustible dust flash fires using a custom flash fire apparatus. Organic and metal dusts are dispersed using an injection system similar to a standard Siwek 20-L combustion chamber, and subsequently ignited into a flash fire directed at the PPE fabric. The performance of the PPE fabric is evaluated using heat flux measurements and compared to a flash fire from a flammable liquid mist.