N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 12-2.10

Current through Register Vol. 46, No. 50, December 11, 2024

Section 12-2.10 - Industrial products coating

(a) Where performed. Coating shall be conducted in a ventilated hood, booth or enclosure complying with this Part (rule) and section 18.20 of Industrial Code Part (Rule No.) 18.

(b) Vehicles. Vehicles shall not be taken into or out of spray coating spaces under their own power, unless the exhaust system is operating.

(c) Use of different types of coating materials. Where different types of coating materials are used in the same booth or space, the booth or space shall be thoroughly cleaned of previous coating deposits before commencing the application of the new substance.

(d) Sanding. Sanding of surfaces containing lead or lead pigment shall be done either with sandpaper wetted with water or in an area provided with an exhaust system providing ventilation at a minimum rate of 150 f.p.m. in the breathing zone of the worker.

(e) Cleaning of hoods and booths. Exhaust fans and the interior of hoods, booths and ducts shall be maintained free of accumulations of coating material.

(f) Lining of spray booths. Material for lining of spray booths or hoods, if used, shall cover the inner sides of the booth or hood without overhanging and shall be maintained in contact with the walls of the booth or hood. Loose sections shall be removed or shall be reapplied to the wall surface.

(g) Forced drying and baking.

(1) Construction. Ovens, cabinets, other enclosures and duct work used for forced drying or baking systems shall be constructed of incombustible material with expansion joints provided in the oven framing. Duct work shall be provided with two inches clearance or three-fourths inch of incombustible rigid insulation where the duct work passes through combustible walls, floors or roofs. The temperature of surfaces in contact with walls, floors or roofs shall not exceed 160 degrees Fahrenheit. The floor surface of the oven shall be of incombustible material and extend at least one foot beyond the oven outline. Interior suraces shall be smooth.

(2) Ventilation.

(i) Ovens, cabinets and other enclosures used for such purpose shall be provided with mechanical ventilation to maintain the concentration of flammable vapors below 25 percent of the lower explosive level at all times. Ovens shall be exhausted mechanically so that an inward air flow shall be maintained through all openings to prevent escape of dangerous air contaminants. The fans of such exhaust ventilating and any recirculating systems shall be interlocked to the heat supply by means of approved air flow switches, so that the heat supply shall be cut off unless the fan maintains the required air flow. Conveyors shall be interlocked with the oven exhaust and any recirculating fans so that the conveyors cannot operate unless such fans are operating.

(ii) When persons are required to enter the drying enclosure, the concentration of air contaminants shall be maintained below the danger level by mechanical ventilation.

(3) Explosion vents. Ovens located inside buildings and in which flammable vapors or combustible gases may be present in amounts exceeding 25 percent of the lower explosive level shall be equipped with explosion relief panels to relieve internal explosion pressures. Such vents shall provide an unobstructed aggregate area of one square foot of panel opening to each 15 cubic feet of oven volume, allowance being made for access openings and doors arranged to yield easily to internal pressure. Relief panels shall, if practicable, be located in the top of the enclosure and be made of material other than glass, which shall yield easily to internal pressure. On long ovens, relief panels shall be distributed to provide effective explosion relief. Relief panels shall be located and arranged so as not to create a hazard to employees or to other work spaces. Panel edges shall be maintained free of condensate and other solid material to insure proper operation.

(4) Controls.

(i) Fan switches shall be interlocked with the fuel valve through a time delay arrangement to assure proper pre-ventilation before the fuel is ignited. Where necessary, enclosure doors shall have a limit switch interlock to prevent the time delay relay from operating unless the enclosure doors are open.

(ii) The fuel supply line shall be provided with a pressure switch to shut off the fuel supply when the fuel supply pressure is insufficient. The switch shall not reopen the fuel valve automatically.

(iii) An excess temperature limit switch shall be provided to cut off the fuel supply when oven temperature exceeds the safe limit. The switch shall not reopen the fuel valve automatically.

(iv) Combustion safeguards shall be provided to shut off the fuel supply in the event of pilot light or ignition failure.

(5) Dampers. Air supply or exhaust volume control dampers shall be adjusted properly and fixed securely. Dampers shall be designed to prevent full closure.

(6) Combination booths. Where coating and forced drying are done alternately in the same booth or enclosure, the following requirements shall be complied with:

(i) During coating operations, the drying apparatus and electrical connections and wiring thereto shall not be located within the coating enclosure nor in any location where coating residue may be deposited thereon.

(ii) Coating apparatus, drying apparatus and ventilating system of the coating enclosure shall be equipped with suitable approved interlocks so arranged that coating apparatus cannot be operated while drying apparatus is inside the coating enclosure and the coating enclosure shall be purged of coating vapors for a period of not less than three minutes before drying apparatus can be energized; the ventilating system shall continue in operation during the drying process and in the event of failure of the ventilating system, the drying apparatus shall shut off automatically.

(7) Cleaning. The inside surfaces of the drying enclosure shall be maintained clean. Cleaning tools shall be of nonferrous material.

(h) Lighting. Illumination of hazardous areas through panels of transparent material is permitted only under the following conditions:

(1) Fixed lighting units shall be used as the source of illumination.

(2) The panel shall effectively isolate the hazardous area from the area in which the lighting unit is located.

(3) The transparent panel shall conform to subdivision (a) of section 18.20 of Industrial Code Part (Rule No.) 18.

(4) The installation shall be such that the normal accumulation of hazardous residue on the exposed surface of the panel will not be raised to a dangerous temperature by heat radiation or conduction from the source of illumination.

(i) Electrostatic apparatus.

(1) Installation and use. The installation and use of electrostatic apparatus shall comply with other applicable provisions of this Part (rule) and with the following requirements:

(2) Approval required. Only approved electrostatic apparatus shall be used.

(3) Conductive coatings. This method shall not be used for spraying conductive coatings.

(4) Hand operations. Manually operated spray guns or atomizers shall not be used in an electrostatic field unless they are approved.

(5) Location. Electrostatic apparatus and devices used in connection with paint spraying, dipping or other coating operations shall have transformers and power packs located ouside spray booths or enclosures and areas subject to paint deposit.

(6) Supports. Electrodes and electrostatic atomizing heads shall be rigidly supported and permanently installed and shall be effectively insulated from ground.

(7) Clearance. Space of at least twice the sparking distance shall be maintained between articles being finished and electrodes, electrostatic atomizing heads or conductors.

(8) Articles on conveyors. Articles on conveyors shall be so arranged and supported as to maintain the required clearances.

(9) Automatic controls. Electrostatic apparatus shall be equipped with automatic controls arranged to make the entire equipment dead if the ventilation of the spraying or drying area falls below a velocity of 100 feet per minute, or if an article on the conveyor projects into the required clearance, or if the conveyor stops.

(10) Guarding and isolation of process. The electrical field and all parts of the equipment carrying high potential shall be located, guarded and fenced off to provide safe isolation of the process. Guards and fences shall be of conducting material and shall be grounded.

(11) Signs. A suitable sign stating the sparking distance shall be posted conspicuously near the assembly. Signs designating the process zone as dangerous by reason of fire and accident hazard shall be posted.

(12) Insulators. Insulators shall be acceptable to the commissioner for the potential used and shall be maintained clean and dry.

N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 12-2.10