More requirements for conventional dry type spray
booths, overspray dry filters, or filter rolls are listed below.
- All discarded filter pads and filter rolls shall be immediately removed to a safe, well-
detached location or placed in a water-filled metal container and disposed of at the close
of the day's operation unless maintained completely in water.
- Space within the spray booth on the downstream and upstream sides of filters shall be
protected with an automatic sprinkler, dry chemical, or carbon dioxide extinguishing
system.
- Filters or filter rolls shall not be used when applying a spray material known to be
highly susceptible to spontaneous heating and ignition.
- Clean filters or filter rolls shall be non-combustible or a type having a combustibility
not in excess of class 2 filters as listed by Underwriter's Laboratories, Inc.
- Filters and filter rolls shall not be alternately used for different types of coating
materials, where the combination of materials could cause spontaneous ignition.
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