[Code of Federal Regulations]
[Title 29, Volume 5]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 29CFR1910.126]

[Page 414-416]
 
                             TITLE 29--LABOR

 
CHAPTER XVII--OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT 

                                OF LABOR

 
PART 1910_OCCUPATIONAL SAFETY AND HEALTH STANDARDS--Table of Contents

 
                      Subpart H_Hazardous Materials

 
Sec. 1910.126  Additional requirements for special dipping and 


coating operations.



    In addition to the requirements in Sec. Sec. 1910.123 through 

1910.125, you must comply with any requirement in this section that 

applies to your operation.

    (a) What additional requirements apply to hardening or tempering 

tanks?

    (1) You must ensure that hardening or tempering tanks:

    (i) Are located as far as practicable from furnaces;

    (ii) Are on noncombustible flooring; and



[[Page 415]]



    (iii) Have noncombustible hoods and vents (or equivalent devices) 

for venting to the outside. For this purpose, vent ducts must be treated 

as flues and kept away from combustible materials, particularly roofs.

    (2) You must equip each tank with an alarm that will sound if the 

temperature of the liquid comes within 50 [deg]F (10 [deg]C) of its 

flashpoint (the alarm set point).

    (3) When practicable, you must also provide each tank with a limit 

switch to shut down the conveyor supplying work to the tank.

    (4) If the temperature of the liquid can exceed the alarm set point, 

you must equip the tank with a circulating cooling system.

    (5) If the tank has a bottom drain, the bottom drain may be combined 

with the oil-circulating system.

    (6) You must not use air under pressure when you fill the dip tank 

or agitate the liquid in the dip tank.

    (b) What additional requirements apply to flow coating? (1) You must 

use a direct low-pressure pumping system or a 10-gallon (38 L) or 

smaller gravity tank to supply the paint for flow coating. In case of 

fire, an approved heat-actuated device must shut down the pumping 

system.

    (2) You must ensure that the piping is substantial and rigidly 

supported.

    (c) What additional requirements apply to roll coating, roll 

spreading, or roll impregnating? When these operations use a flammable 

or combustible liquid that has a flashpoint below 140 [deg]F (60 

[deg]C), you must prevent sparking of static electricity by:

    (1) Bonding and grounding all metallic parts (including rotating 

parts) and installing static collectors; or

    (2) Maintaining a conductive atmosphere (for example, one with a 

high relative humidity) in the vapor area.

    (d) What additional requirements apply to vapor degreasing tanks? 

(1) You must ensure that the condenser or vapor-level thermostat keeps 

the vapor level at least 36 inches (91 cm) or one-half the tank width, 

whichever is less, below the top of the vapor degreasing tank.

    (2) When you use gas as a fuel to heat the tank liquid, you must 

prevent solvent vapors from entering the air-fuel mixture. To do this, 

you must make the combustion chamber airtight (except for the flue 

opening).

    (3) The flue must be made of corrosion-resistant material, and it 

must extend to the outside. You must install a draft diverter if 

mechanical exhaust is used on the flue.

    (4) You must not allow the temperature of the heating element to 

cause a solvent or mixture to decompose or to generate an excessive 

amount of vapor.

    (e) What additional requirements apply to cyanide tanks? You must 

ensure that cyanide tanks have a dike or other safeguard to prevent 

cyanide from mixing with an acid if a dip tank fails.

    (f) What additional requirements apply to spray cleaning tanks and 

spray degreasing tanks? If you spray a liquid in the air over an open-

surface cleaning or degreasing tank, you must control the spraying to 

the extent feasible by:

    (1) Enclosing the spraying operation; and

    (2) Using mechanical ventilation to provide enough inward air 

velocity to prevent the spray from leaving the vapor area.

    (g) What additional requirements apply to electrostatic paint 

detearing? (1) You must use only approved electrostatic equipment in 

paint-detearing operations. Electrodes in such equipment must be 

substantial, rigidly supported, permanently located, and effectively 

insulated from ground by nonporous, noncombustible, clean, dry 

insulators.

    (2) You must use conveyors to support any goods being paint 

deteared.

    (3) You must ensure that goods being electrostatically deteared are 

not manually handled.

    (4) Between goods being electrostatically deteared and the 

electrodes or conductors of the electrostatic equipment, you must 

maintain a minimum distance of twice the sparking distance. This minimum 

distance must be displayed conspicuously on a sign located near the 

equipment.

    (5) You must ensure that the electrostatic equipment has automatic 

controls that immediately disconnect the power supply to the high-

voltage transformer and signal the operator if:



[[Page 416]]



    (i) Ventilation or the conveyors fail to operate;

    (ii) A ground (or imminent ground) occurs anywhere in the high-

voltage system; or

    (iii) Goods being electrostatically deteared come within twice the 

sparking distance of the electrodes or conductors of the equipment.

    (6) You must use fences, rails, or guards, made of conducting 

material and adequately grounded, to separate paint-detearing operations 

from storage areas and from personnel.

    (7) To protect paint-detearing operations from fire, you must have 

in place:

    (i) Automatic sprinklers; or

    (ii) An automatic fire-extinguishing system conforming to the 

requirements of subpart L of this part.

    (8) To collect paint deposits, you must:

    (i) Provide drip plates and screens; and

    (ii) Clean these plates and screens in a safe location.