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The equipment, processes and operations involving dust explosion hazards shall comply with the provisions of this chapter.
Permits shall be required for combustible dust-producing operations as set forth in Section 105.6.
The following word and term shall, for the purposes of this chapter and as used elsewhere in this code, have the meaning shown herein.
COMBUSTIBLE DUST. Finely divided solid material which is 420 microns or less in diameter and which, when dispersed in air in the proper proportions, could be ignited by a flame, spark or other source of ignition. Combustible dust will pass through a U.S. No. 40 standard sieve.
Smoking or the use of heating or other devices employing an open flame, or the use of spark-producing equipment is prohibited in areas where combustible dust is generated, stored, manufactured, processed or handled.
Accumulation of combustible dust shall be kept to a minimum in the interior of buildings. Accumulated combustible dust shall be collected by vacuum cleaning or other means that will not place combustible dust into suspension in air. Forced air or similar methods shall not be used to remove dust from surfaces.
The fire code official is authorized to enforce applicable provisions of the codes and standards listed in Table 1304.1 to prevent and control dust explosions.
TABLE 1304.1
Agricultural and Food Products
Explosion Prevention
National Electrical Code
Boiler and Combustion System Hazards
NFPA 120
Coal Preparation Plants
NFPA 484
Combustible Metals, Metal Powders
and Metal Dusts
NFPA 654
Manufacturing, Processing and Handling
of Combustible Particulate Solids
NFPA 655
Prevention of Sulfur Fires and Explosions
NFPA 664
Prevention of Fires and Explosions in Wood Processing and Woodworking Facilities