by Drake99 » Wed Apr 17, 2019 3:23 pm
NFPA 654, Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids, contains comprehensive guidance on the control of dusts to prevent explosions. The following are some of its recommendations:
Minimize the escape of dust from process equipment or ventilation systems;
Use dust collection systems and filters;
Utilize surfaces that minimize dust accumulation and facilitate cleaning;
Provide access to all hidden areas to permit inspection;
Inspect for dust residues in open and hidden areas, at regular intervals;
Clean dust residues at regular intervals;
Use cleaning methods that do not generate dust clouds, if ignition sources are present;
Only use vacuum cleaners approved for dust collection;
Locate relief valves away from dust hazard areas; and
Develop and implement a hazardous dust inspection, testing, housekeeping, and control program (preferably in writing with established frequency and methods).
The OSHA ventilation standard, 29 CFR 1910.94, contains ventilation requirements for certain types of operations (such as abrasives, blasting, grinding, or buffing) which involve dusts, including combustible dusts. Additionally, 29 CFR 1910.22(a)(1) requires employers to keep work places and other areas clean, which includes the removal of dust accumulations.

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