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 | 464 | 2 | (3) | 60 |
| Equilibrated | CO | 5,000 | 232 | 3 | (3) | 60 | |
| CO | 3,000 | 232 | 3 | (3) | 60 | ||
| Combination of 2 or 3 of above types5 | |||||||
| Combination of all above types6 | |||||||
1Minimum life will be determined at the indicated penetration.
2Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere will be 25 ±2.5 °C.
3Maximum allowable CO penetration will be 385 cm3 during the minimum life. The penetration shall not exceed 500 p/m during this time.
4Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C.
5Test conditions and requirements will be applicable as shown in this table.
6Test 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 | 264 | 2 | (3) | 60 |
| CO | 5,000 | 432 | 3 | (3) | 60 | ||
| CO | 3,000 | 232 | 3 | (3) | 60 | ||
| Combination of 2 or 3 of above types5 | |||||||
| Combination of all above types6 | |||||||
1Minimum life will be determined at the indicated penetration.
2Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere will be 25 ±2.5 °C.
3Maximum allowable CO penetration will be 385 cm3 during the minimum life. The penetration shall not exceed 500 p/m during this time.
4Relative humidity of test atmosphere will be 95 ±3pct; temperature of test atmosphere entering the test fixture will be 0 ±2.5 °C−0 °C.
5Test conditions and requirements will be applicable as shown in this table.
6Test 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 | 232 | 2 | (3) | 460 |
| CO | 5,000 | 532 | 3 | (3) | 60 | ||
| CO | 3,000 | 232 | 3 | (3) | 60 | ||
1Minimum life will be determined at the indicated penetration.
2Relative humidity of test atmosphere will be 95 ±3 pct; temperature of test atmosphere will be 25 ±2.5 °C.
3Maximum allowable CO penetration will be 385 cm3 during the minimum life. The penetration shall not exceed 500 p/m during this time.
4If effluent temperature exceeds 100 °C during this test, the escape gas mask shall be equipped with an effective heat exchanger.
5Relative 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.
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