Oregon Administrative Rules › Chapter 437 - DEPARTMENT OF CONSUMER AND BUSINESS SERVICES, OREGON OCCUPATIONAL SAFETY AND HEALTH DIVISION › Division 2 - GENERAL OCCUPATIONAL SAFETY AND HEALTH RULES › Section 437-002-0107 - Spray Finishing

Current through Register Vol. 63, No. 7, July 1, 2024
(1) Scope.
			 This section applies to finishing materials when applied as a spray by any
			 means in a continuous or intermittent process. This section also covers the
			 application of powders by powder spray guns, electrostatic powder spray guns,
			 fluidized beds, or electrostatic fluidized beds. This section also applies to
			 any sprayed material that produces combustible deposits or residue. This
			 section does not apply to outdoor spray application of buildings, tanks, or
			 other similar structures, nor to small portable spraying apparatus not used
			 repeatedly in the same location.
(2) Definitions:
(a) Aerated solid powders - Any powdered
			 material used as a coating material fluidized within a container by passing air
			 uniformly from below. It is common practice to fluidize such materials to form
			 a fluidized powder bed and then dip the part to be coated into the bed in a
			 manner similar to that used in liquid dipping. Such beds are also used as
			 sources for powder spray operations.
(b) Approved - Approved and listed by a
			 nationally recognized testing laboratory. Refer to ¦1910.7 for
			 definition of nationally recognized testing laboratory.
(c) Electrostatic fluidized bed - A chamber
			 holding powder coating material that is aerated from below to form an
			 air-supported, expanded cloud of the powder. The powder is electrically charged
			 with a charge opposite to that of the object or material being
			 coated.
(d) Fluidized bed - A
			 chamber holding powder coating material that is aerated from below to form an
			 air-supported, expanded cloud of the powder. The object or material being
			 coated is preheated, then immersed into the cloud.
(e) Infrequent and of short duration - Spray
			 finishing that is:
(A) Less than 9 square feet
			 surface area per job, and
(B) Uses
			 less than 1-gallon of material in 1-day, and
(C) Intermittent spraying where enough time
			 elapses between spraying episodes to dilute the concentration of vapors
			 essentially to zero before spraying is resumed.
(f) Listed - See "approved."
(g) Noncombustible materials - Materials that
			 have a fire resistance rating of at least 1-hour.
(h) Overspray - Any sprayed material that is
			 not deposited on the intended object.
(i) Spray area - Any area in which
			 potentially dangerous quantities of flammable vapors or mists, or combustible
			 residues, dusts, or deposits are present due to the operation of spraying
			 processes.
(j) Spray booth - A
			 power-ventilated structure provided to enclose or accommodate a spraying
			 operation to confine and limit the escape of spray, vapor, and residue, and to
			 safely conduct or direct them to an exhaust system.
(k) Spray room - A room designed to
			 accommodate a spraying operation. For the purposes of this rule, the term
			 "spray booth" includes spray rooms except where specifically noted.