DSEAR 2002 & ATEX — Explosion-Proof Vacuums for Hazardous Environments
DSEAR 2002 and ATEX — explosion-proof vacuums for hazardous environments
The Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR) require employers to eliminate or reduce the risks from fire, explosion, and substances with similar hazards that may be present in the workplace. Where an explosive atmosphere may exist, DSEAR requires the area to be classified into zones, and equipment used in those zones must be appropriate for that classification.
For vacuum and dust extraction equipment, DSEAR is the UK legislative framework that creates the requirement for ATEX-rated (explosion-proof) vacuums in environments where flammable or explosive dusts, gases or vapours may be present.
What DSEAR requires
- Regulation 5 — Risk assessment: employers must identify all dangerous substances present in the workplace and assess the risks they create.
- Regulation 7 — Elimination or reduction of risks: where possible, dangerous substances must be replaced with less hazardous alternatives. Where the risk cannot be eliminated, measures must prevent ignition of any explosive atmosphere that may form.
- Regulation 7(3) — Zone classification: where an explosive atmosphere may be present, employers must classify the area into hazardous zones. Equipment used in classified zones must be appropriate for that zone.
The ATEX zone classification system
Flammable gases and vapours:
- Zone 0: explosive gas atmosphere present continuously or for long periods. Example: inside a fuel storage tank.
- Zone 1: explosive gas atmosphere likely in normal operation. Example: spray booth, chemical mixing area, marine fuel dispensing area.
- Zone 2: explosive gas atmosphere not likely in normal operation but may persist briefly if it occurs.
Flammable dusts:
- Zone 20: cloud of flammable dust present continuously or for long periods. Example: inside dust collection equipment, inside silos handling combustible dusts.
- Zone 21: cloud of flammable dust likely in normal operation. Example: around loading points for grain, flour, sugar or wood dust.
- Zone 22: cloud of flammable dust not likely in normal operation but may persist briefly if it occurs.
Standard industrial vacuums — including M-Class and H-Class extractors — are not rated for use in any ATEX zone. Using a standard vacuum to collect or extract flammable or explosive dust in a classified zone creates a direct ignition risk.
DSEAR and confined spaces — the critical crossover
Many confined spaces also contain or may contain explosive atmospheres — fuel vapour in marine tanks, solvent vapour in chemical process vessels, combustible dust in silos, and hydrogen sulphide in sewer environments. Where a confined space also contains an explosive atmosphere, both the Confined Spaces Regulations 1997 and DSEAR 2002 apply simultaneously. Equipment used inside such a space must be both suitable for confined space use and ATEX-rated for the zone classification of that space. See Confined Spaces guidance →
Industries where ATEX-rated vacuum equipment is required
- Grain handling and milling: grain dust is combustible. Grain elevators, mill floors and loading areas are typically Zone 21 or Zone 22.
- Wood processing: fine wood dust is explosive. Sawmills, wood chip processing and MDF manufacturing have classified dust zones.
- Chemical manufacturing and pharmaceuticals: flammable solvents and fine chemical dusts create Zone 1/2 gas and Zone 21/22 dust environments.
- Petrochemical and oil & gas: Zone 1 and Zone 2 gas environments are standard across extraction, processing and distribution facilities.
- Food manufacturing: flour, sugar and starch dust are all combustible. Large-scale food production has classified dust zones around bulk handling equipment.
- Automotive spray booths: solvent-based paint fumes create Zone 1 gas atmospheres inside spray booths during spraying operations.
- Marine — fuel tanks, engine rooms, paint and solvent areas: Zone 0 inside fuel tanks and ballast tanks containing fuel residue; Zone 1 around marine fuel dispensing and antifouling paint application areas. See Marine sector →
V-TUF ATEX-rated vacuum equipment
V-TUF supplies ATEX-rated explosion-proof vacuums for use in classified hazardous zones. These are separately rated and certified to the ATEX Directive and UK ATEX Regulations 2016 for use in specific zone categories. They should not be confused with M-Class or H-Class dust extractors — which are health-rated for dust classification purposes but are not explosion-rated.
Compliance blog — further reading
COSHH 2002 in an F1 factory: what the regulations actually require →
Related legislation
COSHH Regulations 2002 — hazardous substance control →
Confined Spaces Regulations 1997 — crossover with DSEAR →
HSE EH40 Workplace Exposure Limits — combustible dust WELs →
PUWER 1998 — suitability of equipment for the working environment →
RIDDOR — reporting fires and explosions as dangerous occurrences →
Related industries
Manufacturing — industrial cleaning in classified hazardous environments →
Food and beverage — combustible dust in grain, flour and sugar handling →
Agriculture — grain handling and farm biosecurity →
Marine — fuel tanks, spray areas and confined spaces on vessels →
Trade accounts
V-TUF operates trade account terms for buyers in hazardous industries. ATEX-rated equipment can be specified alongside standard industrial cleaning equipment for non-classified areas of the same facility.
Telephone: 01522 787978. Email through the contact page. Mention ATEX or DSEAR hazardous environment at first contact.