Are there guarding requirements for using compressed air in a shop?

Air lines in a shop normally operate between 80 psi and 120 psi. Most air actuated (pneumatic tools) need higher pressures to operate effectively. OSHA requires that when the tip of an air gun is blocked or “dead ended,” the static pressure at the point of blockage is no more than 30 psi.

Also, whenever mechanics are using compressed air to clean the shop area, effective chip guarding is required. There are safety nozzles available which divert air through slots near the end of the nozzle to provide a protective air cone to prevent chips from coming back towards the mechanic. The OSHA standard that covers using compressed air for cleaning is 29 CFR Part 1910.242(b). Protective eyewear and clothing should always be used when using compressed air for cleaning.