(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 [deg]C.) to enter the canister continuously at concentrations and rates of flow specified in Tables 5, 6, and 7 of this subpart.
(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 [deg]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.
(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.
Sec. 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]--------------------------------------------------------------------------------------------------------------------------------------------------------
Test atmosphere
---------------------------------------------------- Maximum Minimum
Flow rate Number of allowable service
Canister type Test condition Concentration (liters tests penetratin life
Gas or vapor (parts per per (parts per (minutes)
million) minute) million) \1\--------------------------------------------------------------------------------------------------------------------------------------------------------Acid gas................................ As received SO2 20,000 64 3 5 12
Equilibrated Cl2 20,000 64 3 5 12
........................ SO2 20,000 32 4 5 12
........................ Cl2 20,000 32 4 5 12Organic vapor........................... As received CCl4 20,000 64 3 5 12
Equilibrated CCl4 20,000 32 4 5 12Ammonia................................. As received NH3 30,000 64 3 50 12
Equilibrated NH3 30,000 32 4 50 12Carbon 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\) 60Combination 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
[deg]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 [deg]C-0 [deg]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]--------------------------------------------------------------------------------------------------------------------------------------------------------
Test atmosphere
------------------------------------------------- Maximum Minimum
Flow rate Number of allowable service
Canister type Test condition Concentration (liters tests penetration life
Gas or vapor (parts per per (parts per (minutes)
million) minute) million) \1\--------------------------------------------------------------------------------------------------------------------------------------------------------Acid gas............................. As received Equilibrated SO2 50,000 64 3 5 12
............................. Cl2 5,000 64 3 5 12
............................. SO2 5,000 32 4 5 12
............................. Cl2 5,000 32 4 5 12Organic vapor........................ As received Equilibrated CCl4 5,000 64 3 5 12
............................. CCl4 5,000 32 4 5 12Ammonia.............................. As received Equilibrated NH3 5,000 64 3 50 12
As received Equilibrated NH3 5,000 32 4 50 12Carbon 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\) 60Combination 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
[deg]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 [deg]C-0 [deg]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]--------------------------------------------------------------------------------------------------------------------------------------------------------
Test atmosphere
------------------------------------------------- Maximum Minimum
Flow rate Number of allowable service
Canister type Test condition Concentration (liters tests penetration life
Gas or vapor (parts per per (parts per (minutes)
million) minute) million) \1\--------------------------------------------------------------------------------------------------------------------------------------------------------Acid gas............................. As received.................. SO2 5,000 64 3 5 12
Equilibrated................. Cl2 5,000 64 3 5 12
SO2 5,000 32 4 5 12
Cl2 5,000 32 4 5 12Organic vapor........................ As received.................. CCl4 5,000 64 3 5 12
Equilibrated................. CCl4 5,000 32 4 5 12Ammonia.............................. As received.................. NH3 5,000 64 3 50 12
Equilibrated................. NH3 5,000 32 4 50 12Carbon 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
[deg]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 [deg]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 [deg]C-0 [deg]C.