In Reply to Parent Post by Marc
What is the mechanism? Something like a cleaning head on an air hose being directed at the body and it piercing the skin?
Yeah, unregulated at about 110psi, got under shin and into blood. There have been reported cases of knuckleheads playing around and blowing high pressure air at peoples backsides and causing severe, life threatening injuries in the rectum and lower bowels.
OSHA specifies less than 30psi and then don't use air to clean people under most conditions. Here is an extract of an OSHA interpretation letter from 1994:
"Occupational Safety and Health Administration (OSHA) standard 29 CFR 1910.242(b) requires that compressed air used for cleaning purposes must be reduced to less than 30 psig (pounds per square inch gauge, 204 kPa). Compressed air used for cleaning must only be permitted with effective chip guarding and personal protective equipment to protect the operator and other employees from the hazards of the release of compressed air and flying debris."