Can compressed air be used to clean work surfaces or worker’s clothing?

According to OSHA, compressed air cannot be used for cleaning purposes (work surfaces) unless the pressure is reduced to less than 30 p.s.i., and then only when effective chip guarding and personal protective equipment is used (1910.242(b)).

Note that OSHA has said that the use of compressed air for cleaning purposes at pressures greater than 30 p.s.i.is permissible, if the outlet or source is fitted with a relief device that drops the pressure to less than 30 p.s.i. if the flow is dead ended. Air guns used with long pipes are acceptable, if they meet the requirements of 29 CFR 1910.242(b). This is not necessarily an official “exception” but comes from an April 14, 1978, Letter of Interpretation.

In a January 14, 1994, letter of interpretation, OSHA says that employers should not allow employees to use compressed air for cleaning themselves or their clothing in general industry situations. The eyes and other body parts, such as the respiratory system, may be damaged as the result of inadequate personal protective equipment, lack of chip guards, and/or uncontrolled release of compressed air. Also, you may want to take a look at the OSHA Directive for 1910.242(b), STD 1-13.1 - Reduction of Air Pressure below 30 psi for Cleaning Purposes.