Compressed air safety at work: what employers must control before airline use

Treat every airline task as work equipment use

The Provision and Use of Work Equipment Regulations 1998 (PUWER) apply to equipment used at work, including compressors, receivers, distribution pipework, flexible hoses, couplings, blow guns and pneumatic tools. Employers must provide equipment that is suitable for the intended use, maintained in an efficient state and used by people with adequate information, instruction and training. Inspection is needed where deterioration could create a health and safety risk.

Translate those duties into a task assessment. Record the material being moved, the pressure and airflow needed, the nozzle or tool, who could be exposed, the environment, foreseeable misuse and the method for isolation. A general rule saying ‘use compressed air carefully’ does not tell a supervisor whether blowing out a blind hole, clearing metal swarf or cleaning a dusty bench is acceptable.

HSE: PUWER overview ↗ · Provision and Use of Work Equipment Regulations 1998 ↗

Do not use compressed air to clean people or clothing

Make this a clear prohibition, not an informal preference. HSE's compressed-air guidance says air should never be used to clean clothing. Air or debris can enter through a small cut or body opening, and incidents involving bodily entry have caused very serious and sometimes fatal injuries. Eye injuries are also foreseeable when a jet accelerates swarf, grit or other particles.

Ban horseplay and challenge the familiar end-of-shift habit of dusting down overalls. Provide a safe alternative close to the work, such as a suitable industrial vacuum with the correct attachment, changing facilities or an appropriate washing arrangement. A rule is unlikely to last if the only practical cleaning method remains the airline beside the bench.

HSE: compressed air safety (HSG39) ↗

Choose a cleaning method that collects rather than disperses

Compressed air often moves contamination without removing it. HSE advises that blowing or brushing settled dust puts it back into the air where people can breathe it. Use a suitable industrial vacuum or wet method where the substance and process allow. Wood dust needs particular care: HSE says not to sweep it or use compressed air lines and recommends at least a Class M industrial vacuum for cleanup.

For machined components, test alternatives such as vacuum extraction, absorbent material, low-pressure coolant equipment, spindle-mounted fans or automatic air cleaning inside an interlocked enclosure. If air remains necessary, justify the task and control the release at source. Keep people out of the line of fire, contain the component, capture the contaminant and prevent discharge towards open work areas.

Where the material is hazardous to health, the COSHH assessment must cover the cleaning step, not only the production process. It should address what becomes airborne, exposure duration, nearby workers, existing extraction, cleaning of filters and waste, and any health surveillance indicated by the substance and exposure. PPE can support the system but does not turn uncontrolled dispersal into a safe method.

HSE: vacuuming dust ↗ · Related guide: a safety data sheet is not a COSHH assessment →

Control the hose, coupling, nozzle and stored energy

Flexible hoses deteriorate through abrasion, heat, oils, crushing, repeated flexing and damage at the coupling. A failure can release air suddenly and make an unsupported hose whip. Set a documented pre-use check for cuts, blisters, exposed reinforcement, damaged threads, loose or incompatible couplings, missing retention devices, damaged triggers and unsuitable improvised repairs.

Provide the right nozzle and pressure control for the assessed job. Low-noise or safety nozzles may reduce particular risks, but a product label is not a complete assessment. The whole arrangement must still be suitable for the material, pressure, surrounding people and foreseeable blockage. Never kink a hose as a substitute for isolation or disconnect a pressurised coupling.

Define a defect process that operators can use immediately: stop, isolate, dissipate stored pressure, label the equipment and prevent reconnection until a competent person has repaired and checked it. Supervisors should know who may alter regulators, replace couplings or maintain pneumatic equipment. Temporary tape, jubilee clips and mismatched connectors are warning signs, not maintenance solutions.

Assess noise, flying particles and everyone in range

Blow guns can generate high noise levels, particularly with open-ended pipes, high pressure, repeated bursts or impact on a component. Include the task in the noise risk assessment rather than assuming short bursts do not matter. Reduce the need for blowing, lower the pressure and airflow to the effective minimum, select quieter equipment, separate the task and maintain silencers or nozzles. Hearing protection is not the first or only control.

Control the path of particles with screens, enclosures, extraction and exclusion zones. Suitable eye or face protection may be needed for the operator and anybody who could be struck, but it should sit behind engineering and task controls. Consider visitors, apprentices, cleaners and colleagues at adjacent benches, not just the person holding the gun.

HSE: engineering FAQ on compressed-air cleaning ↗ · Related guide: noise at work risk assessment →

Keep use controls separate from pressure-system examination

The task assessment does not replace duties for the pressure system itself. Depending on the system and its stored energy, the Pressure Systems Safety Regulations 2000 may require a written scheme of examination for relevant parts, examination by a competent person before use and at specified intervals, and action on defects. Routine compressor servicing is not automatically that statutory examination.

Equally, a current examination report does not prove a blow-gun task is safe. It may confirm the condition of items covered by the scheme, while leaving the employer to control nozzle selection, hose condition, dust, noise, training and misuse under other duties. Keep the records linked so defects found during use can inform maintenance and the competent person where relevant.

HSE: introduction to pressure equipment ↗ · Related guide: written schemes of examination →

Compressed air safety checklist

Legal requirements and official HSE guidance were checked on 13 October 2026. PUWER, COSHH and the Pressure Systems Safety Regulations remain current. HSG39 is HSE guidance, not a certificate or substitute for a site-specific risk assessment; apply it with current legislation, manufacturer information and the actual task.

• List every airline task, including cleaning, drying, blowing out and pneumatic tools.
• Remove tasks that can be completed by vacuum, wet cleaning or enclosure.
• Prohibit blowing air at people or clothing and provide a workable alternative.
• Specify the suitable pressure, airflow, nozzle, coupling and hose for each task.
• Check hoses, couplings, triggers, retention and guards before use.
• Control swarf, dust, fluid and other material at source under COSHH where applicable.
• Assess noise and reduce it through method, pressure, nozzle, enclosure and maintenance.
• Isolate and depressurise before disconnection, adjustment, cleaning or repair.
• Give users task-specific instruction and supervise foreseeable shortcuts or horseplay.
• Quarantine defects promptly and record repair, replacement and recurrent failure.
• Confirm whether the pressure system needs a written scheme of examination.