(a) Resistance to airflow will be measured in the facepiece, mouthpiece, hood, or helmet of a chemical cartridge respirator mounted on a test fixture with air flowing at a continuous rate of 85 liters per minute, both before and after each test conducted in accordance with Sec. Sec. 84.206 through 84.207.
(b) The maximum allowable resistance requirements for chemical cartridge respirators are as follows:
Maximum Resistance
[Millimeter water column height]------------------------------------------------------------------------
Inhalation
Type of chemical-cartridge -------------------------- Exhalation
respirator Initial Final \1\------------------------------------------------------------------------Other than single-use vinyl
chloride respirators:
For gases, vapors, or gases 40 45 20
and vapors..................
For gases, vapors, or gases 50 70 20
and vapors, and particulatesSingle-use respirator with
valves:
For vinyl chloride........... 20 25 20
For vinyl chloride and 30 45 2
particulates................Single-use respirator without
valves:
For vinyl chloride........... 15 20 (\2\)
For vinyl chloride and 25 40 (\2\)
particulates................------------------------------------------------------------------------\1\ Measured at end of service life specified in Table 11 of this
subpart.\2\ Same as inhalation.