Combustible Dust Regulations 2027 — Industrial Dust Control and ATEX Compliance

Combustible Dust Regulations 2027 — Industrial Dust Control, Explosion Risk and ATEX Compliance

Combustible dust is one of the most underestimated industrial hazards in UK workplaces. When fine organic or metallic dust is suspended in air at sufficient concentration and encounters an ignition source, the result is a dust explosion — a rapid pressure wave capable of destroying buildings, killing workers and triggering secondary explosions from dust disturbed by the initial blast. The 2027 regulatory updates strengthen the existing framework for combustible dust hazard identification, risk assessment and engineering controls across industrial facilities.

For businesses in grain handling, woodworking, pharmaceutical manufacturing, food processing, chemical processing, metalworking and any other industry generating fine combustible dust, the 2027 changes require a review of dust control systems, hazard zone classification and the specification of equipment used in those zones.

What makes dust combustible?

Any fine particulate material that can burn in air can form an explosive dust cloud under the right conditions. The five elements required for a dust explosion — the dust explosion pentagon — are:

Combustible dust — fine particles of organic, metallic or chemical material
Suspension in air — at or above the minimum explosive concentration (MEC)
Ignition source — spark, static, hot surface, open flame or electrical fault
Oxygen — present in normal air
Confinement — a vessel, room or building that allows pressure to build

Remove any one element and the explosion cannot occur. Engineering controls focus on eliminating or controlling the first three: preventing dust accumulation, controlling ignition sources and using explosion-protected equipment in hazardous zones.

Industries and materials at risk

Industry	Combustible dusts	Risk level
Grain handling and storage	Grain dust, flour, starch	Very high
Flour milling and bakeries	Flour, sugar, starch	Very high
Woodworking and timber	Fine wood dust, MDF dust	High
Pharmaceutical manufacturing	Active pharmaceutical ingredients, excipients	High
Chemical processing	Fine chemical dusts, pigments, polymers	High
Metalworking and foundries	Aluminium, magnesium, iron dust	High
Recycling and waste processing	Mixed fine material, paper dust, plastic dust	Medium-high
Coal and biomass handling	Coal dust, wood pellet dust, biomass fines	Very high

The UK regulatory framework for combustible dust

The UK regulatory framework for combustible dust draws on several overlapping pieces of legislation:

Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR) — the primary UK legislation covering explosive atmospheres from flammable gases, vapours, mists and combustible dusts. Requires risk assessment, zone classification, elimination or control of ignition sources, and use of appropriate equipment in hazardous zones.
ATEX Directives (Equipment and Workplace) — ATEX 2014/34/EU (equipment) and ATEX 1999/92/EC (workplace) set the standards for equipment used in explosive atmospheres and the duties of employers in those environments. Post-Brexit, the UK ATEX regulations (SI 2016/1107) apply in Great Britain.
COSHH 2002 — combustible dusts that are also hazardous to health (grain dust, wood dust, pharmaceutical dusts) are subject to COSHH as well as DSEAR. A single dust risk assessment must address both the health hazard and the explosion risk.
Health and Safety at Work Act 1974 — the overarching duty of care for all workplace hazards including combustible dust.

The 2027 updates strengthen hazard identification requirements, tighten the duty to demonstrate that dust control systems are adequate, and expand enforcement scope for HSE inspectors visiting industrial facilities with known combustible dust hazards.

Hazardous zone classification — Zone 20, 21 and 22

DSEAR requires employers to classify areas where explosive dust atmospheres may occur into zones:

Zone 20 — a place where an explosive atmosphere in the form of a cloud of combustible dust is present continuously, for long periods or frequently. Inside dust-handling equipment, silos, mills and conveyors.
Zone 21 — a place where an explosive atmosphere in the form of a cloud of combustible dust is likely to occur in normal operation occasionally. Near openings of handling equipment, filling and emptying points.
Zone 22 — a place where an explosive atmosphere in the form of a cloud of combustible dust is not likely to occur in normal operation but may occur in abnormal conditions and will persist for only a short period. General areas around Zone 21 locations where dust may settle and be disturbed.

All equipment used in zoned areas must be appropriately rated for that zone. A standard industrial vacuum cleaner — even an M-Class or H-Class rated machine — must not be used in Zone 20 or Zone 21 areas. Only equipment with the correct ATEX rating for the zone may be used.

ATEX rated vacuum cleaners — the Zone 22 specification

For Zone 22 environments — the most common zone for cleaning operations in grain stores, mills, woodworking facilities and food production — ATEX Zone 22 certified vacuum cleaners are the compliant specification for dust removal and housekeeping. These machines are designed and certified to prevent ignition of combustible dust during operation — no electrical sparks, controlled static discharge, no hot surfaces above the ignition temperature of the dust.

The V-TUF ATX4500i is Zone 22 M-Class certified — the specification for dust extraction and housekeeping in Zone 22 combustible dust environments. Antistatic dust bags and antistatic hose assemblies are required accessories for Zone 22 operation.

ATEX Dust Extractors → Zone 22 certified M-Class dust extraction for combustible dust environments. ATX4500i 110V and 240V.

Grain Store Cleaning → GCX and MAMMOTH range for grain and organic dust recovery in agricultural environments.

Agriculture Sector Hub → Cleaning and dust extraction for agricultural environments including grain stores.

DSEAR and ATEX → Full DSEAR and ATEX legislation guidance for explosive atmospheres.

Practical steps for 2027 compliance

Carry out a combustible dust risk assessment — identify all dusts generated or present, assess their combustibility (Kst value, MEC, MIE), and determine the extent of hazardous zones.
Zone classify your facility — document Zone 20, 21 and 22 areas with plans. Review whether existing zone boundaries are still accurate given any changes to process or layout.
Audit all equipment in zoned areas — every piece of equipment in a zoned area must carry the correct ATEX marking for that zone. Replace any non-compliant equipment before 2027 enforcement intensifies.
Review housekeeping procedures — dust accumulation on surfaces is a primary fuel source for secondary explosions. Housekeeping frequency, method and equipment specification should all be documented in the risk assessment.
Check vacuum cleaner specifications — standard industrial vacuums, including M-Class and H-Class health-rated machines, are not rated for use in ATEX zones. Only Zone 22 or higher rated machines may be used in classified areas.
Ensure antistatic accessories are specified — antistatic hoses, wands, floor tools and dust bags must be used with ATEX rated vacuums in Zone 22 environments to prevent static ignition.

This page is for general guidance only. Combustible dust risk assessment and zone classification should be carried out by a competent person with specific expertise in explosive atmospheres. Consult a DSEAR specialist or your industry trade association for guidance specific to your facility and processes.

Telephone: 01522 787978 | Contact the V-TUF trade team →