Combustible Dust Management SWMS

Combustible dust from flour, grain, sugar, starch, milk powder, and cocoa powder creates explosion risk in food processing facilities whenever fine dust is dispersed into air at concentrations above the minimum explosive concentration and encounters an ignition source. Dust explosions have killed workers and destroyed facilities in the food processing industry worldwide. The explosion sequence often involves a primary ignition event that dislodges accumulated dust from surfaces, creating a secondary explosion of far greater destructive force. Prevention requires a combination of dust extraction, housekeeping, ignition source control, and explosion protection systems. This template maps controls to the binding Managing Risks of Hazardous Chemicals Code of Practice effective 1 July 2026.

Legal Requirements

regulation

WHS Regulation 2025 Part 7.1 — Hazardous Chemicals

hrcw category

Work in or near a combustible dust atmosphere

code of practice

Managing Risks of Hazardous Chemicals in the Workplace (binding 1 July 2026 under Section 26A)

section 26a binding

Yes — effective 1 July 2026. Non-compliance is admissible as evidence of breach.

Hazards

Hazard	Consequence	Likelihood
Primary dust explosion from ignition of suspended combustible dust	Fatal blast injuries, severe burns, structural damage	Unlikely
Secondary dust explosion from dust dislodged by primary blast	Catastrophic facility destruction, multiple fatalities	Rare
Dust fire in extraction systems and filter units	Equipment destruction, facility fire, production loss	Possible
Dust accumulation on hot surfaces causing smouldering ignition	Localised fire, potential dust explosion trigger	Possible
Static discharge igniting dust cloud during transfer operations	Dust explosion, flash fire	Unlikely
Dust accumulation in concealed spaces creating undetected hazard	Unexpected explosion from concealed dust source	Possible

Controls (Hierarchy of Controls)

Conduct a combustible dust hazard analysis identifying all locations where explosive dust concentrations can occur

Install and maintain dust extraction systems at all dust generation points including transfer, milling, and packaging

Implement a housekeeping program that prevents dust accumulation exceeding 1 mm on any surface

Use HEPA-filtered vacuum cleaners for dust removal — never use compressed air or brooms to clean combustible dust

Eliminate ignition sources in dust-hazardous areas including hot surfaces, sparks, and uncontrolled electrical equipment

Install explosion venting or suppression systems on silos, dust collectors, and enclosed processing equipment

Implement hot work permit procedures prohibiting welding and cutting in dust-hazardous areas without specific controls

Ground all equipment and transfer systems to prevent static discharge in dust-laden atmospheres

Recent Prosecutions

Hilltop Meats Pty Ltd$750,000

Fatal incident in food processing facility with inadequate safety systems and equipment controls.

2025 — SafeWork NSW v Hilltop Meats Pty Ltd [2025]

Inghams Enterprises Pty Ltd$450,000

Worker seriously injured in food processing equipment incident with inadequate isolation procedures.

2023 — SafeWork NSW v Inghams Enterprises Pty Ltd [2023]

What Your SWMS Must Include

✓Combustible dust hazard analysis identifying all dust explosion risk locations

✓Dust extraction system specifications, maintenance schedule, and performance testing

✓Housekeeping program with inspection frequency, cleaning methods, and accountability

✓Ignition source control procedures for dust-hazardous areas

✓Explosion protection system inspection and testing schedule

Need a compliant Combustible Dust SWMS?

Our process safety engineers build facility-specific SWMS that address explosion prevention, housekeeping standards, and protection systems for your food processing operations.