Bench tests; gas and vapor tests; minimum requirements; general.

§ 84.207 Bench tests; gas and vapor tests; minimum requirements; general. (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 °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. (h) Powered air-purifying respirators with a cartridge(s) and particulate filter(s) must meet the as-received minimum service-life requirements and half of the equilibrated minimum service-life requirements set forth in table 11 of subpart L using the flows specified in subpart K, § 84.175(b) and equilibrated in accordance with paragraphs (a) through (g) of this section using the flows specified in subpart K, § 84.175(b). [60 FR 30355, June 8, 1995, as amended at 85 FR 20607, Apr. 14, 2020] Pt. 84, Subpt. L, Tables Tables to Subpart L of Part 84 Tables 9–10 [Reserved] Table 11—Cartridge Bench Tests and Requirements [42 CFR part 84, subpart L] Cartridge Test condition Test atmosphere Gas or vapor Concentration (p.p.m.) Flowrate (l.p.m.) Number of tests Penetration  1 (p.p.m.) Minimum life  2 (min.) Ammonia As received NH 3 1000 64 3 50 50 Ammonia Equilibrated NH 3 1000 32 4 50 50 Chlorine As received Cl 2 500 64 3 5 35 Chlorine Equilibrated Cl 2 500 32 4 5 35 Hydrogen chloride As received HCl 500 64 3 5 50 Hydrogen chloride Equilibrated HCl 500 32 4 5 50 Methylamine As received CH 3 NH 2 1000 64 3 10 25 Methylamine Equilibrated CH 3 NH 2 1000 32 4 10 25 Organic vapors As received CCl 4 1000 64 3 5 50 Organic vapors Equilibrated CCl 4 1000 32 4 5 50 Sulfur dioxide As received SO 2 500 64 3 5 30 Sulfur dioxide Equilibrated SO 2 500 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.