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2406.3.5 Ventilation.
Exhaust ventilation and powder recovery systems shall be provided in accordance with Chapter 5 of the Mechanical Code.
2406.4 Operation and maintenance.
Facilities in which powder coating operations are conducted shall be operated and maintained in compliance with the requirements of this section.
2406.4.1 Housekeeping.
Powder coating areas, including horizontal surfaces such as ledges, beams, pipes, hoods, booths and floors, shall be kept free from the accumulation of powder coating dusts.
2406.4.2 Cleaning.
Surfaces shall be cleaned in such a manner as to avoid scattering dust or creating a dust cloud. Vacuum cleaning equipment shall be of a type approved for use in a hazardous location.
2406.4.3 Spark-producing metals.
Magnetic separators, filter-type separators, or other approved means shall be installed or used to prevent iron or other spark-producing metals from being introduced into the powders or the powder-coating operation.
2406.4.4 Preheating parts.
The temperature of the parts heated prior to coating shall not exceed the ignition temperature of the powder to be used.
2406.4.5 Sources of ignition.
Protection against sources of ignition shall be provided in accordance with FC 2403.2. Static bonding and grounding or other appropriate precautions shall be taken to minimize the possibility of ignition by static electrical sparks generated by powder transport, application and recovery systems.
2406.4.6 Portable fire extinguishers.
Powder coating rooms and booths shall be provided with portable fire extinguishers complying with the requirements of FC 906 and rated for flammable and combustible liquid fires in extra (high) hazard environments.
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