Every textile mill makes dust. Cotton fly, wool dust, synthetic lint and dyestuff powder settle on floors, frames, ledges and light fittings throughout every shift. Left in place, it damages workers' lungs and feeds fires. Cleaning it the wrong way — with a broom or an airline — makes both problems worse.
This guide sets out what the law expects of mill owners, and which vacuum you need for each job.
Why textile dust matters
Health
HSE links cotton dust to byssinosis, a lung disease that causes chest tightness and breathlessness, with acute and in some cases long-term effects. Wool and cotton process dusts can also cause occupational asthma and respiratory irritation. Wool dust is associated with chronic bronchitis, persistent rhinitis and conjunctivitis. Dyestuff powders used in finishing can harm health too.
Fire and explosion
HSE describes cotton fly as "very hazardous when it is on fire" — it is hard to put out because even light water jets blow it about. Dust on light fittings is singled out as a particular risk. Wool dust can explode, and ground flock from cotton, acrylic and nylon carries a higher explosion risk. The danger peaks when settled dust is thrown into the air — exactly what happens when you sweep or blow down.
What the law requires you to do
COSHH — control exposure
Under the Control of Substances Hazardous to Health Regulations 2002 (COSHH), textile dust is a substance hazardous to health. As the employer, you must:
- Assess the risk from every dust in your mill — raw fibre, fly, lint and dyestuffs.
- Prevent exposure, or where you can't, control it adequately. Control at source first (enclosing machines, local exhaust ventilation), with respirators as the last line.
- Keep exposure below the workplace exposure limit (WEL).
- Maintain your controls. HSE expects a visual check of local exhaust ventilation (LEV) at least weekly, a thorough examination at least every 14 months, and records kept for at least five years.
- Give workers information and training on the risks and controls.
The WEL for cotton dust is 2.5 mg/m³ as an 8-hour time-weighted average (the average exposure across a working day). It applies to dust from handling raw and waste cotton, including blends. Dust from weaving, knitting and later processes, or from bleached or dyed cotton, is not covered by that figure — but it still falls under COSHH as a dust hazardous to health.
DSEAR — prevent fires and explosions
Under the Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR), combustible dust is a dangerous substance. You must assess the fire and explosion risk, remove or reduce it, and classify any area where an explosive dust cloud could form into zones. Equipment used in a zoned area must be suitable for that zone. Zone 22 is an area where a dust cloud is unlikely in normal operation and, if it does occur, will only last a short time.
Housekeeping is a core control. HSE says fluff and dust should be cleaned regularly, especially from high ledges.
How to clean: what HSE says
- Clean with a vacuum cleaner — not a broom, brush or compressed air.
- "Flapping down" with cardboard or blowing down with compressed air is strongly discouraged, because it lifts settled dust back into the air.
- Don't use compressed airlines to blow down frames.
- If brushing can't be avoided, dampen the floor with a water spray first.
- For dyestuff spills, use a Type H (H-Class) industrial vacuum or a piped vacuum system.
Choosing the right vacuum
Industrial vacuums are rated by dust class. M-Class is for dusts with a WEL of 0.1 mg/m³ or more. H-Class is for all hazardous dusts, including those with lower limits or carcinogens. Match the class to the dust, then check whether the area is zoned under DSEAR.
Routine fly and lint — M-Class
Cotton dust's WEL of 2.5 mg/m³ puts it well within M-Class. The V-TUF MIGHTY HSV 21L M-Class (also in 110V) is a wet and dry extractor with a velocity monitor that warns when airflow drops. For larger floor areas, step up to the MIGHTY XL HSV 37L.
Dyestuff and finishing areas — H-Class
For dyestuff powders and spills, use H-Class. The V-TUF MIDI H 21L H-Class suits mixing and dispensing areas. For bigger areas, the MAXi 80L H-Class offers far more capacity.
Zoned areas — ATEX Zone 22
If your DSEAR assessment zones an area — such as opening, carding or flock handling — a standard vacuum can become an ignition source. The ATX2000 45L and ATX4500i 45L are M-Class extractors rated for ATEX Zone 22. If any area is zoned 20 or 21, call us before buying.
High ledges and light fittings
Fly on beams, ledges and light fittings is a fire risk that floor cleaning misses. The RUCKVAC HSV backpack vacuum with H14 HEPA filtration comes with a 5m high-level internal cleaning kit. It is not ATEX rated, so keep it to non-zoned areas.
Mill owner's checklist
- COSHH assessment covers every dust type in the mill.
- DSEAR assessment done and areas zoned where needed.
- Brooms and airlines retired for dust cleaning.
- The right vacuum class in each area — M, H or ATEX.
- High-level cleaning scheduled, not left to shutdowns.
- LEV checked weekly, examined every 14 months, records kept.
- Staff trained on the risks and the kit.
Not sure which class you need for each area? Call the V-TUF trade team on 01522 787978.
Related links
- COSHH Regulations 2002 — controlling exposure to hazardous substances
- HSE EH40 — Workplace Exposure Limits
- DSEAR and ATEX — combustible dust zone classification
- Health-rated vacuum cleaners — why dust classification matters
- M-Class Dust Extractors
- ATEX Dust Extractors
- Cleaning equipment for the textiles industry
- Cleaning equipment for manufacturing and engineering
- Carbon fibre dust and COSHH
- Contact V-TUF
