Overspray dry filters of filter rolls, when installed in dry-type spray booths, shall comply with the following:
(a) The spraying operations shall be so designed, installed and maintained that the average air velocity over the open face of the booth (or booth cross-section during spraying operations) shall be not less than 100 linear feet per minute. Visible gauges or audible alarm or pressure-activated devices shall be installed to indicate or insure that the required air velocity is maintained.
(b) 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.
(c) The location of filters in a spray booth shall be so as to not reduce the effective booth enclosure of the articles being sprayed.
(d) Space within spray bath on the downstream and upstream sides of filters shall be protected with approved automatic sprinklers.
(e) Filters or filter rolls shall be used when applying a spray material known to be highly susceptible to spontaneous heating and ignition.
(f) Clean filters or filter rolls shall be noncombustible or of approved type.
(g) Filters and filter rolls shall not alternately be used for different types of coating materials, where the combination of materials may be conducive to spontaneous ignition.
(Prior code § 129.1-53)