Canister bench tests; minimum requirements.

§ 84.126 Canister bench tests; minimum requirements. (a)(1) Bench tests, except for carbon monoxide tests, will be made on an apparatus that allows the test atmosphere at 50 ±5 percent relative humidity and room temperature (25 ±2.5 °C.) to enter the canister continuously at concentrations and rates of flow specified in Tables 5, 6, and 7 of this subpart. (2) Three canisters will be removed from containers and tested as received from the applicant. (3) Two canisters, other than those described in paragraph (a)(2) of this section, will be equilibrated at room temperature by passing 25 percent relative humidity air through them at 64 liters per minute for 6 hours. (4) Two canisters, other than those described in paragraphs (a) (2) and (3) of this section, will be equilibrated at room temperature by passing 85 percent relative humidity air through them at 64 liters per minute for 6 hours. (5) The equilibrated canisters will be resealed, kept in an upright position at room temperature, and tested within 18 hours. (b) Front-mounted and back-mounted gas mask canisters will be tested and shall meet the minimum requirements set forth in Table 5 of this subpart. (c)(1) Front-mounted, and back-mounted, and chin-style canisters designated as providing respiratory protection against gases, ammonia, organic vapors, carbon monoxide and particulate contaminants shall have a window or other indicator to warn the gas mask wearer when the canister will no longer satisfactorily remove carbon monoxide from the inhaled air. (2) Other types of front- and back-mounted canisters may also be equipped with a window or other indicator to warn of imminent leakage of other gases or vapors. (3) The window indicator canisters will be tested as regular canisters, but shall show a satisfactory indicator change or other warning before the allowable canister penetration has occurred. (d) Chin-style gas mask canisters shall meet the minimum requirements set forth in Table 6 of this subpart. (e) Escape gas mask canisters shall meet the minimum requirements set forth in Table 7 of this subpart. (f) Powered air-purifying respirators with a canister(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 Tables 5, 6, and 7 of subpart I using the flows specified in subpart K, § 84.175(b) and equilibrated in accordance with paragraphs (a) through (e) 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. I, Tables Tables to Subpart I of Part 84 Table 5—Canister Bench Tests and Requirements for Front-Mounted and Back-Mounted Gas Mask Canisters [42 CFR part 84, subpart I] Canister type Test condition Test atmosphere Gas or vapor Concentration (parts per million) Flow rate (liters per minute) Number of tests Maximum allowable penetratin (parts per million) Minimum service life (minutes)  1 Acid gas As received SO 2 20,000 64 3 5 12   Equilibrated Cl 2 20,000 64 3 5 12   SO 2 20,000 32 4 5 12   Cl 2 20,000 32 4 5 12 Organic vapor As received CCl 4 20,000 64 3 5 12   Equilibrated CCl 4 20,000 32 4 5 12 Ammonia As received NH 3 30,000 64 3 50 12   Equilibrated NH 3 30,000 32 4 50 12 Carbon monoxide As received CO 20,000 4  64 2 ( 3 ) 60   Equilibrated CO 5,000 2  32 3 ( 3 ) 60   CO 3,000 2  32 3 ( 3 ) 60 Combination of 2 or 3 of above types  5 Combination of all above types  6 1  Minimum life will be determined at the indicated penetration. 2  Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere will be 25 ±2.5 °C. 3  Maximum allowable CO penetration will be 385 cm  3 during the minimum life. The penetration shall not exceed 500 p/m during this time. 4  Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C. 5  Test conditions and requirements will be applicable as shown in this table. 6  Test conditions and requirements will be applicable as shown in this table, except the minimum service lives for acid gas, organic vapor, and ammonia will be 6 min instead of 12 min. Table 6—Canister Bench Tests and Requirements for Chin-Style Gas Mask Canisters [42 CFR part 84, subpart I] Canister type Test condition Test atmosphere Gas or vapor Concentration (parts per million) Flow rate (liters per minute) Number of tests Maximum allowable penetration (parts per million) Minimum service life (minutes)  1 Acid gas As received Equilibrated SO 2 50,000 64 3 5 12   Cl 2 5,000 64 3 5 12   SO 2 5,000 32 4 5 12   Cl 2 5,000 32 4 5 12 Organic vapor As received Equilibrated CCl 4 5,000 64 3 5 12   CCl 4 5,000 32 4 5 12 Ammonia As received Equilibrated NH 3 5,000 64 3 50 12   As received Equilibrated NH 3 5,000 32 4 50 12 Carbon monoxide As received CO 20,000 2  64 2 ( 3 ) 60   CO 5,000 4  32 3 ( 3 ) 60   CO 3,000 2  32 3 ( 3 ) 60 Combination of 2 or 3 of above types  5 Combination of all above types  6 1  Minimum life will be determined at the indicated penetration. 2  Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere will be 25 ±2.5 °C. 3  Maximum allowable CO penetration will be 385 cm  3 during the minimum life. The penetration shall not exceed 500 p/m during this time. 4  Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C. 5  Test conditions and requirements will be applicable as shown in this table. 6  Test conditions and requirements will be applicable as shown in this table, except the minimum service lives for acid gas, organic vapor, and ammonia will be 6 min instead of 12 min. Table 7—Canister Bench Tests and Requirements for Escape Gas Mask Canisters [42 CFR part 84, subpart I] Canister type Test condition Test atmosphere Gas or vapor Concentration (parts per million) Flow rate (liters per minute) Number of tests Maximum allowable penetration (parts per million) Minimum service life (minutes)  1 Acid gas As received SO 2 5,000 64 3 5 12   Equilibrated Cl 2 5,000 64 3 5 12   SO 2 5,000 32 4 5 12   Cl 2 5,000 32 4 5 12 Organic vapor As received CCl 4 5,000 64 3 5 12   Equilibrated CCl 4 5,000 32 4 5 12 Ammonia As received NH 3 5,000 64 3 50 12   Equilibrated NH 3 5,000 32 4 50 12 Carbon monoxide As received CO 10,000 2  32 2 ( 3 ) 4  60   CO 5,000 5  32 3 ( 3 ) 60   CO 3,000 2  32 3 ( 3 ) 60 1  Minimum life will be determined at the indicated penetration. 2  Relative humidity of test atmosphere will be 95 ±3 pct; temperature of test atmosphere will be 25 ±2.5 °C. 3  Maximum allowable CO penetration will be 385 cm  3 during the minimum life. The penetration shall not exceed 500 p/m during this time. 4  If effluent temperature exceeds 100 °C during this test, the escape gas mask shall be equipped with an effective heat exchanger. 5  Relative humidity of test atmosphere will be 95 ±3 pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C.