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Subchapter 7. General Industry Safety Orders
Group 20. Flammable Liquids, Gases and Vapors
Article 137. Spray Coating Operations

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§5445. Scope.

(a) Scope. This Article covers the application of flammable or combustible materials when applied as a spray by compressed air, "airless" or "hydraulic atomization," or by steam, or electrostatic methods or by any other means in continuous or intermittent processes. It also covers the application of combustible powders when applied by powder spray guns, electrostatic powder spray guns, fluidized beds or electrostatic fluidized beds.

NOTE: This Article does not cover outdoor spray application of buildings, tanks or other similar structures, nor small portable spraying apparatus not used repeatedly in the same location; however, the safeguards contained in this Article pertaining to cleanliness, care of flammable liquids, dangerous vapor-air or powder-air mixtures and sources of ignition should be followed where applicable.

(b) This Article does not cover the spray application of noncombustible finishing material. Certain water type finishes, however, although involving little or no hazard in the liquid state may leave highly combustible residues upon evaporation of the liquid carrier. The provisions of this standard for minimizing the hazards of combustible residues shall be followed irrespective of the characteristics of the liquid.

(c) Spray rooms shall meet the requirements of Sections 5446, 5447, 5448, 5449 and 5450.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No. 29).

2. Amendment filed 11-18-76; effective thirtieth day thereafter (Register 76, No. 47).

3. Amendment of subsection (b) and new subsection (c) filed 12-5-86; effective thirtieth day thereafter (Register 86, No. 51).

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