• Due to the risk of fire hazard, spray areas must be kept free from accumulation of combustible residues, and care must be taken with other combustibles like flammable liquids and contaminated employee clothing.
• The spraying area must display the appropriate warning signage, including no smoking warnings, ventilation warnings, and signs calling for proper grounding of electrical equipment.

All spraying areas must be kept as free from the accumulation of deposits of combustible residues as practical, with cleaning conducted daily if necessary. Scrapers, spuds, or other such tools used for cleaning purposes must be of non-sparking material. The use of solvents for cleaning operations must be restricted to those having flashpoints not less than 100°F. However, for cleaning spray nozzles and auxiliary equipment, solvents having flash points not less than those normally used in spray operations may be used. Such cleaning must be conducted inside spray booths and ventilating equipment operated during cleaning.

Spray finishing employees’ clothing must not be left on the premises overnight unless kept in metal lockers.

The storage of flammable liquids or liquids with a flashpoint greater than 199.4°F (93°C) in connection with spraying operations must conform to the requirements of 1910.106, where applicable. See also 1910.107(e).

Spray booths must not be alternately used for different types of coating materials, where the combination of the materials may be conducive to spontaneous ignition, unless all deposits of the first used material are removed from the booth and exhaust ducts prior to spraying with the second used material.

Fire hazards

In sprinklered buildings, the automatic sprinkler system in rooms containing spray finishing operations must conform to the requirements of 1910.159. In unsprinklered buildings where sprinklers are installed only to protect spraying areas, the installation must conform to such standards insofar as they are applicable. Sprinkler heads must be located so as to provide water distribution throughout the entire booth, and must be kept as free from deposits as practical by cleaning daily if necessary. An adequate supply of suitable, portable fire extinguishers must be installed near all spraying areas.

Residue scrapings and debris contaminated with residue must be immediately removed from the premises and properly disposed of. Approved metal waste cans must be provided wherever rags or waste are impregnated with finishing material and all such rags or waste deposited therein immediately after use. The contents of waste cans must be properly disposed of at least once daily or at the end of each shift.

Labeling

The spraying and powder coating equipment must carry a prominent permanently installed warning regarding the necessity for a grounding feature on all electrically conductive objects in the spraying area or within the charging influence of the electrodes. The drying apparatus must contain a prominently located, permanently attached warning sign indicating that ventilation should be maintained during the drying period and that spraying should not be conducted in the vicinity that spray will deposit on apparatus.

Posting

Smoking must be prohibited and “No smoking” signs in large letters on contrasting color background must be conspicuously posted at all spraying areas, paint storage rooms, powder coating areas and powder storage rooms.

Only nonsparking tools may be used in any area where organic peroxides are stored, mixed or applied. A safe distance must be maintained between goods being painted and electrodes or electrostatic atomizing heads or conductors of at least twice the sparking distance. A suitable sign indicating safe distance must be conspicuously posted near the assembly. The spraying and powder coating equipment must carry a prominent permanently installed warning regarding the necessity for a grounding feature on all electrically conductive objects in the spraying area or within the charging influence of the electrodes.

The drying apparatus must contain a prominently located, permanently attached warning sign indicating that ventilation should be maintained during the drying period and that spraying should not be conducted in the vicinity that spray will deposit on apparatus.