Combustible dust can create explosive atmospheres in common processes such as conveying, grinding, bagging and silo handling. In South Africa, area classification for dust is guided by IEC/SANS 60079‑10‑2, which defines Zone 20 (continuous or long periods), Zone 21 (likely in normal operation) and Zone 22(unlikely/short duration) to help select equipment and control ignition sources.
Your legal duties sit on two fronts. Under the Occupational Health and Safety Act and the Hazardous Chemical Agents Regulations (2021), employers must identify airborne hazards, monitor exposures and implement engineering controls such as capture at source and effective filtration to protect workers. Separately, the National Environmental Management: Air Quality Act and the National Dust Control Regulations (2013) require managing ambient dust fall beyond the fence line important for communities and permitting even though this is distinct from explosion risk.
When benchmarking good practice, European rules (the ATEX Workplace Directive 1999/92/EC) also use dust zoning (20/21/22) to structure risk assessments and equipment selection; this framework remains a helpful reference for South African facilities handling combustible powders. In addition, the NFPA consolidation effort (NFPA 660) provides widely used best‑practice guidance on dust hazard analysis, housekeeping and explosion isolation.
Envirox designs, installs and maintains industrial air‑filtration and extraction systems that align with SANS/IEC 60079‑10‑2 zoning and international best practice. As South Africa’s distributor of Nederman solutions, we pair proven equipment with local compliance know‑how helping plants map zones, capture dust at source and implement explosion protection where required.
Need help classifying your plant and selecting zone‑appropriate controls?
Envirox’s engineers can audit, measure airflow and specify Nederman systems to keep people, processes and the environment safe.
