42 CFR 84.1149 - Airflow resistance tests; all dust, fume, and mist respirators; minimum requirements.

§ 84.1149 Airflow resistance tests; all dust, fume, and mist respirators; minimum requirements.
(a) Resistance to airflow will be measured in the facepiece, mouthpiece, hood, or helmet of a dust, fume, or mist respirator mounted on a test fixture with air flowing at a continuous rate of 85 liters per minute, both before and after each test conducted in accordance with §§ 84.1144 through 84.1147.
(b) The maximum allowable resistance requirements for dust, fume, and mist respirators are as follows:
Maximum Resistance
[mm. water-column height]
Type of respirator Initial inhalation Final inhalation Exhalation
1 Measured after silica dust test described in § 84.1144.
Pneumoconiosis- and fibrosis-producing dusts, or dusts and mists 12 15 15
Dust, fume, and mist, with single-use filter 30 50 20
Dust, fume, and mist, with reusable filter 20 40 20
Radon daughter 18 1 25 15
Asbestos dust and mist 18 25 15
Beta! The text on the eCFR tab represents the unofficial eCFR text at ecfr.gov.
§ 84.1149 Airflow resistance tests; all dust, fume, and mist respirators; minimum requirements.

(a) Resistance to airflow will be measured in the facepiece, mouthpiece, hood, or helmet of a dust, fume, or mist respirator mounted on a test fixture with air flowing at a continuous rate of 85 liters per minute, both before and after each test conducted in accordance with §§ 84.1144 through 84.1147.

(b) The maximum allowable resistance requirements for dust, fume, and mist respirators are as follows:

Maximum Resistance

[mm. water-column height]

Type of respirator Initial inhalation Final inhalation Exhalation
Pneumoconiosis- and fibrosis-producing dusts, or dusts and mists 12 15 15
Dust, fume, and mist, with single-use filter 30 50 20
Dust, fume, and mist, with reusable filter 20 40 20
Radon daughter 18 1 25 15
Asbestos dust and mist 18 25 15

1 Measured after silica dust test described in § 84.1144.

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United States Code
U.S. Code: Title 29 - LABOR
U.S. Code: Title 30 - MINERAL LANDS AND MINING