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Personal Protective Equipment - Respiratory Protection

§84.91 Breathing resistance test; exhalation.

RegSense National Institute of Occupational Safety and Health (NIOSH), CDC, HHS Personal Protective Equipment Safety & Health CFR Regulations General Industry Safety CFR Section Respiratory Protection English Focus Area USA

(a) Resistance to exhalation airflow will be measured in the facepiece or mouthpiece of open-circuit apparatus with air flowing at a continuous rate of 85 liters per minute.

(b) The exhalation resistance of demand apparatus shall not exceed 25 mm. (1 inch) water-column height.

(c) The exhalation resistance of pressure-demand apparatus shall not exceed the static pressure in the facepiece by more than 51 mm. (2 inches) water-column height.

(d) The static pressure (at zero flow) in the facepiece shall not exceed 38 mm. (1.5 inches) water-column height.

(e) Resistance to exhalation airflow will be measured in the facepiece or mouthpiece of closed-circuit apparatus with a breathing machine as described in §84.88, and the exhalation resistance shall not exceed 51 mm. (2 inches) water-column height.

['Personal Protective Equipment']

['Respiratory Protection']

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