SPRAY FINISHING

Operations and Maintenance

Solvents used for cleaning operations must have flashpoints not less than 100慚. However, for cleaning spray nozzles and auxiliary equipment, solvents having flash points not less than temperatures normally occurring in spray operations may be used. Such cleaning shall be conducted inside spray booths with ventilating equipment operating during cleaning.

Spray booths shall not be alternately used for different coating materials, which when combined may be conducive to spontaneous ignition, unless all deposits of the first used material are removed from the booth and exhaust ducts prior to using the second material. Examples of dangerous combinations are:

Deposits of lacquers containing nitrocellulose combined with finishes containing drying oils, such as varnishes, oil-based stains, air-drying enamels, and primers

Bleaching compounds based on hydrogen peroxide, hypochlorites, perchlorates, or other oxidizing compounds combined with any organic finishing materials.

Other operation rules include that employees' spray finishing clothing shall not be left on the premises overnight unless kept in metal lockers. Also "No Smoking" signs in large letters on contrasting background color shall be conspicuously posted at all spraying areas and paint storage rooms.

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