To control dust explosions, focus on these key areas:

1. Ventilation: Implement and maintain effective exhaust ventilation systems to remove contaminated air from work spaces . Ensure a continuous inward flow of air in blast-cleaning enclosures to minimize the escape of dust . Regularly inspect and maintain exhaust systems, addressing any dust leaks promptly .
2. Dust Collection: Use dust collecting equipment and ensure it is emptied and maintained to prevent contamination of other areas . For pneumatic dust collection systems, equip fabric dust filter collectors with monitoring devices to indicate pressure drop across the filter surface .
3. Housekeeping: Develop and implement a written housekeeping program to reduce dust accumulation on surfaces . Immediately remove dust accumulations exceeding 1/8 inch in priority areas . Use vacuuming or wet methods for cleaning to avoid creating dust clouds .
4. Equipment and Design: Use appropriate equipment for environments with combustible dust. Only use power-operated industrial trucks designated as EX in areas where combustible dust is continuously or intermittently suspended in the air . Ensure equipment is properly grounded to prevent static charges .
5. Explosion Prevention: Develop an explosion prevention plan that includes measures for the design, erection, location, and maintenance of explosion barriers . Consider using explosion venting areas in abrasive blasting enclosures to provide pressure relief in case of an explosion .
6. Ignition Source Control: Implement preventive maintenance procedures, including regular inspections of mechanical and safety control equipment 5, 17. Prohibit smoking, open flames, and spark-producing devices in areas where blasting agents are mixed .
7. Material Handling: Use organic abrasives, which are combustible, only in automatic systems . Keep metal powders dry and stored in moisture-resistant containers .
8. Monitoring and Training: Implement a program for monitoring respirable dust concentrations . Inform contractors of potential fire and explosion hazards and applicable safety rules .

By focusing on these areas, you can significantly reduce the risk of dust explosions in the workplace.