Some specific occupancies specific occupancies
The best example is NFPA 664, that covers wood processing and woodworking areas. where fibers or flyings are produced or handled are covered by other standards that provide information on how those occupancies should be treated. Issues such as housekeeping routines, collection or containment methods collection or containment methods
Dust collection systems are covered by NFPA 650, Standard for Pneumatic Conveying Systems for Handling Combustible Particulate Solids, and by NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids. for the materials, and area classification guidelines may be included in these documents.
The classification of textile areas depends on the type of manufacturing or handling that takes place as well as the methods used to prevent fibers from collecting.

NOTE: This is an unformatted excerpt from our online fire protection training library.