(a) Bench tests will be made on an apparatus that allows the test atmosphere at 50 5 percent relative humidity and room temperature, approximately 25 [deg]C, to enter the cartridges continuously at predetermined concentrations and rates of flow, and that has means for determining the test life of the cartridges.
(b) Where two cartridges are used in parallel on a chemical cartridge respirator, the bench test will be performed with the cartridges arranged in parallel, and the test requirements will apply to the combination rather than to the individual cartridges.
(c) Three cartridges or pairs of cartridges will be removed from containers and tested as received from the applicant.
(d) Two air purifying cartridges or pairs of cartridges will be equilibrated at room temperature by passing 25 percent relative humidity air through them at the flow rate of 25 liters per minute (l.p.m.) for 6 hours.
(e) Two air purifying cartridges or pairs of cartridges will be equilibrated by passing 85 percent relative humidity air through them at the flow rate of 25 l.p.m.
(f) All cartridges will be resealed, kept in an upright position, at room temperatures, and tested within 18 hours.
(g) Cartridges will be tested and shall meet the minimum requirements set forth in Table 11 of this subpart.
Sec. Tables to Subpart L of Part 84
Tables 9-10 [Reserved]
Table 11--Cartridge Bench Tests and Requirements
[42 CFR part 84, subpart L]--------------------------------------------------------------------------------------------------------------------------------------------------------
Test atmosphere
-------------------------------------- Flowrate Number of Penetration Minimum
Cartridge Test condition Concentration (l.p.m.) tests \1\ life \2\
Gas or vapor (p.p.m.) (p.p.m.) (min.)--------------------------------------------------------------------------------------------------------------------------------------------------------Ammonia.............................. As received............ NH3 1000 64 3 50 50Ammonia.............................. Equilibrated........... NH3 1000 32 4 50 50Chlorine............................. As received............ Cl2 500 64 3 5 35Chlorine............................. Equilibrated........... Cl2 500 32 4 5 35Hydrogen chloride.................... As received............ HCl 500 64 3 5 50Hydrogen chloride.................... Equilibrated........... HCl 500 32 4 5 50Methylamine.......................... As received............ CH3 NH2 1000 64 3 10 25Methylamine.......................... Equilibrated........... CH3 NH2 1000 32 4 10 25Organic vapors....................... As received............ CCl4 1000 64 3 5 50Organic vapors....................... Equilibrated........... CCl4 1000 32 4 5 50Sulfur dioxide....................... As received............ SO2 500 64 3 5 30Sulfur dioxide....................... Equilibrated........... SO2 500 32 4 5 30--------------------------------------------------------------------------------------------------------------------------------------------------------\1\ Minimum life will be determined at the indicated penetration.\2\ Where a respirator is designed for respiratory protection against more than one type of gas or vapor, as for use in ammonia and in chlorine, the
minimum life shall be one-half that shown for each type of gas or vapor. Where a respirator is designed for respiratory protection against more than
one gas of a type, as for use in chlorine and sulfur dioxide, the stated minimal life shall apply. Subpart M [Reserved]