Historical
NFPA 33-1995
NFPA 33: Standard for Spray Application Using Flammable or Combustible Materials , 1995 Edition
Covers the application of flammable or combustible materials when applied as a spray by compressed air, "airless" or "hydraulic atomization", or by steam, or electrostatic methods or by any other means in continuous or intermittent processes; also covers application of combustible powers when applied by powder spray guns, electrostatic powder spray guns, fluidized beds or electrostatic fluidized beds.
National Fire Protection Association [nfpa]