Portable Tool Safety
Compressed Air
Hazard Control
Hazard Control
OSHA 1926.302(b) · Max 30 PSI for Cleaning · Never Direct at Skin · Air Embolism Risks
Compressed air is used constantly on NYC construction sites — pneumatic nailers, airguns, paint sprayers, jackhammers, and cleaning operations all depend on it. Workers who grew up using compressors sometimes develop complacency about compressed air's ability to cause severe injury. Air injection under the skin (subcutaneous emphysema) is a medical emergency that occurs at pressures as low as 40 PSI.
The Injuries Compressed Air Causes
- Air embolism: Compressed air blown at an open wound or thin skin can enter the bloodstream and travel to the heart or brain — immediately life-threatening at any working pressure
- Subcutaneous emphysema: Air injected under intact skin at high velocity — causes severe pain and requires surgical intervention
- Eye injury: Particulate driven by compressed air at high velocity causes corneal abrasion, penetration, and blindness
- Pressure blast from hose failure: A pressurized hose that fails at a fitting whips at lethal velocity — use safety cable (whip check) on all pneumatic connections
Operating Rules
- OSHA 1926.302(b): Do NOT use compressed air for cleaning purposes in excess of 30 PSI — and only with effective chip guarding and PPE
- Never point a compressed air hose at any person, even playfully — joke injuries are real injuries
- Drain condensate from the air receiver and line oilers daily — water in lines causes tool corrosion and sluggish performance
- Always bleed pressure from lines before disconnecting fittings — do not pull connections under full pressure
- Safety cables (whip checks): required on all pneumatic connections at the hose and tool end
Pneumatic Nailers — Additional Hazards
- The most common pneumatic tool injury on NYC sites: the nail gun fire-through — a fastener that exits the far side of the material
- Never bypass the sequential trip trigger for a contact trip trigger without explicit training and authorization
- Keep the muzzle pointed away from your body and others at all times — even when "empty"
Discussion Questions
- What is the maximum air pressure allowed for cleaning purposes under OSHA 1926.302(b)?
- Why is it dangerous to blow compressed air on a coworker as a prank, even briefly?
- What is a whip check and where is it required on pneumatic hose connections?
- Before disconnecting a pneumatic fitting, what must you do first?
Sign-Off
Project Address
Date
Time
Foreman / Supervisor
SSM / SSC Name & License No.
Worker Attendance
| # | Worker Name (Print) | Signature |
|---|---|---|
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 7 | ||
| 8 | ||
| 9 | ||
| 10 | ||
| 11 | ||
| 12 | ||
| 13 | ||
| 14 | ||
| 15 | ||
| 16 | ||
| 17 | ||
| 18 | ||
| 19 | ||
| 20 |