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
Number of tests
Maximum allowable penetratin (parts per million)
Minimum service life (minutes) 1
Gas or vapor
Concentration (parts per million)
Flow rate (liters per minute)
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
12
Organic vapor
As received
CCl4
20,000
64
3
5
12
Equilibrated
CCl4
20,000
32
4
5
12
Ammonia
As received
NH3
30,000
64
3
50
12
Equilibrated
NH3
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
Number of tests
Maximum allowable penetration (parts per million)
Minimum service life (minutes) 1
Gas or vapor
Concentration (parts per million)
Flow rate (liters per minute)
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
12
Organic vapor
As received Equilibrated
CCl4
5,000
64
3
5
12
CCl4
5,000
32
4
5
12
Ammonia
As received Equilibrated
NH3
5,000
64
3
50
12
As received Equilibrated
NH3
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
Number of tests
Maximum allowable penetration (parts per million)
Minimum service life (minutes) 1
Gas or vapor
Concentration (parts per million)
Flow rate (liters per minute)
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
12
Organic vapor
As received
CCl4
5,000
64
3
5
12
Equilibrated
CCl4
5,000
32
4
5
12
Ammonia
As received
NH3
5,000
64
3
50
12
Equilibrated
NH3
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.