Table C (Continued)—ANSI Z88.2–1980 and OSHA 1984 Assigned Protection Factors.
| Self-contained breathing apparatus, pressure-demand-type open-circuit or positive-pressure-type closed-circuit, quarter-mask or half-mask facepiece, full facepiece or mouthpiece/nose clampc | Yesg | Yesg | N/A | N/A |
| No tests are required due to positive-pressure operation of respirator. The maximum protection factor is 10 000 plus.h | ||||
| Combination respirators not listed. | The type and mode of operation having the lowest respirator protection factor shall be applied to the combination respirator. | |||
N/A means not applicable since a septor-fitting test is not carried out.
aA respirator protection factor is a measure of the degree of protection provided by a respirator to a respirator wearer. Multiplying the permissible time-weighted average concentration or the permissible ceiling concentration, whichever is applicable, for a toxic substance, of the maximum permissible airborne concentration for a radionuclide, by a protection factor assigned to a respirator gives the maximum concentration of the hazardous substance for which the respirator can be used. Limitations of filters, cartridges, and cambiers used in air-purifying respirators shall be considered in determining protection factors.
bWhen the respirator is used for protection against sirborne particulate matter having a permissible lime-weighted average concentration less than 0.05 milligram particulate matter per cubic meter of air or less then 2 million particles per cubic foot of air, or for protection against airborne radionuclide particulate matter, the respirator shall be equipped with a high efficiency filter(s).
cIf the air contaminant causes eye irritation, the wearer of a respirator equipped with a quarter mask or half-mask facepiece or mouthpiece and nose clamp shall be permitted to use a protective goggle or to use a respirator equipped with a full facepiece.
dIf the powered air-purifying respirator is equipped with a facepiece, the escape provision means that the wearer is able to breathe through the filter, cartridge, or canister and through the pump. If the powered as purifying respirator is equipped with a helmet, hood, or suit, the escape provision shall be an auxillary self-contained supply of respirable air.
eThe escape provision shall be an auxiliary self-contained supply of respirable air.
fFor definition of "oxygen deficiency - not immediately dangerous to life or health" see Section 2.
gFor definition of "oxygen deficiency - Immediately dangerous to life or health" see Section 2 and A10.
hThe protection factor measurement exceeds the limit of sensitivity of the test apparatus. Therefore, the respirator has been classified for use in atmospheres having unknown concentrations of conteminents.
iThe service life of a raper or gas-removing cartridge or canister depends on the specific vapor or gas, the concentration of the vapor or gas in air, the temperature and humidity of the air, the type and quantity of the sorbent in the cartridge or canister, and the activity of the resgator water. Cartridges and canisters may prode only very short service lives for certain vapors and gears. Vaporizes service life testing is recommended to ensure that cartridges and canisters provide adequate service lives. Reference should be made to published reports which give vapor/gas life data for cartridges and canisters.
jVapor- and par-removing respirators are not approved for contaminants that lack adequate warning properties of odor, irritation, or taste at concentrations in air at or above the permissible exposure limits.
NOTE: Respirator protection factors for air purifying-type respirators equipped with a mouthpiece/nose clamp form of respiratory inlet covering are not given, since such respirators are approved only for escape purposes.
