Compressed Air Blowgun Safety
What does dead-ended pressure mean for a blowgun?
It is the pressure at the nozzle when the outlet is blocked; safety devices are evaluated on whether they remain below the legal limit under that condition.
What is the Canadian threshold in BC for cleaning with compressed air?
WorkSafeBC identifies 70 kPa gauge (10 psig) or an equivalent pressure-limiting safety nozzle.
What is the OSHA threshold?
Federal OSHA requires compressed air used for cleaning to be reduced to less than 30 psi with effective chip guarding and PPE.
Compressed Air Blowgun Safety refers to controls that ensure safe use of blowguns for cleaning parts or surfaces by limiting nozzle pressure, preventing direct jet exposure, and implementing chip guarding, PPE, and noise controls. In British Columbia, WorkSafeBC requires compressed air for cleaning to be limited to 70 kPa gauge (10 psig) or an equivalent safety nozzle, and prohibits use where injury or health hazards may occur.
On a manufacturing or shop floor, compressed air blowguns are only acceptable when using purpose-designed safety nozzles that keep outlet pressure below legal limits if blocked or dead-ended. In Canadian federal workplaces, regulations prohibit using compressed air for blowing dust where exposure, fire, explosion, or airborne contaminant exceedances could occur. U.S. OSHA allows compressed air for cleaning only when reduced to less than 30 psi with effective chip guarding and PPE. Practical application includes using safety-pattern blowguns with built-in pressure relief, aiming nozzles away from body and others, adding chip guarding, requiring safety glasses, hearing and respiratory protection, and preferring vacuum cleaning as a safer alternative.
Using a standard open blowgun that exceeds legal dead-end pressure limit when blocked, instead of a regulated safety nozzle.
Blowing on clothing, skin, or another worker, which is explicitly prohibited in Canadian guidance and widely identified as a serious injury hazard.
Ignoring flying debris, noise, and airborne dust hazards; even safe blowguns can create eye injury, hearing loss, or inhalation exposure if PPE and controls are not in place.