10CFR20 Appendix A
Assigned Protection Factors for Respirators (a)
I. Air Purifying Respirators [Particulate (b) only] (c):
Filtering facepiece disposable (d) Negative Pressure..... (d)
Facepiece, half (e) Negative Pressure 10
Facepiece, full Negative Pressure 100
Facepiece, half Powered air-purifying 50
Facepiece, full Powered air-purifying 1000
Helmet/hood Powered air-purifying 1000
Facepiece, loose-fitting Powered air-purifying 25
II. Atmosphere supplying respirators [particulate, gases and
vapors (f)]:
1. Air-line respirator:
Facepiece, half Demand 10
Facepiece, half Continuous Flow 50
Facepiece, half Pressure Demand 50
Facepiece, full Demand 100
Facepiece, full Continuous Flow 1000
Facepiece, full Pressure Demand 1000
Helmet/hood Continuous Flow 1000
Facepiece, loose-fitting Continuous Flow 25
Suit Continuous Flow (g)
2. Self-contained breathing Apparatus (SCBA):
Facepiece, full Demand (h) 100
Facepiece, full Pressure Demand (i) 10,000
Facepiece, full Demand, Recirculating (h)100
Facepiece, full Positive Pressure (i) 10,000
Recirculating
III. Combination Respirators: Any combination of air-purifying
Assigned protection factor for and atmosphere-supplying type
and mode of operation as respirators. listed above.
10CFR20 Appendix A
Assigned Protection Factors for Respirators (a)
I. Air Purifying Respirators [Particulate (b) only] (c):
Filtering facepiece disposable (d) Negative Pressure..... (d)
Facepiece, half (e) Negative Pressure 10
Facepiece, full Negative Pressure 100
Facepiece, half Powered air-purifying 50
Facepiece, full Powered air-purifying 1000
Helmet/hood Powered air-purifying 1000
Facepiece, loose-fitting Powered air-purifying 25
II. Atmosphere supplying respirators [particulate, gases and
vapors (f)]:
1. Air-line respirator:
Facepiece, half Demand 10
Facepiece, half Continuous Flow 50
Facepiece, half Pressure Demand 50
Facepiece, full Demand 100
Facepiece, full Continuous Flow 1000
Facepiece, full Pressure Demand 1000
Helmet/hood Continuous Flow 1000
Facepiece, loose-fitting Continuous Flow 25
Suit Continuous Flow (g)
2. Self-contained breathing Apparatus (SCBA):
Facepiece, full Demand (h) 100
Facepiece, full Pressure Demand (i) 10,000
Facepiece, full Demand, Recirculating (h)100
Facepiece, full Positive Pressure (i) 10,000
Recirculating
III. Combination Respirators: Any combination of air-purifying
Assigned protection factor for and atmosphere-supplying type
and mode of operation as respirators. listed above.
10CFR20 Appendix A
Assigned Protection Factors for Respirators (a)
I. Air Purifying Respirators [Particulate (b) only] (c):
Filtering facepiece disposable (d) Negative Pressure..... (d)
Facepiece, half (e) Negative Pressure 10
Facepiece, full Negative Pressure 100
Facepiece, half Powered air-purifying 50
Facepiece, full Powered air-purifying 1000
Helmet/hood Powered air-purifying 1000
Facepiece, loose-fitting Powered air-purifying 25
II. Atmosphere supplying respirators [particulate, gases and
vapors (f)]:
1. Air-line respirator:
Facepiece, half Demand 10
Facepiece, half Continuous Flow 50
Facepiece, half Pressure Demand 50
Facepiece, full Demand 100
Facepiece, full Continuous Flow 1000
Facepiece, full Pressure Demand 1000
Helmet/hood Continuous Flow 1000
Facepiece, loose-fitting Continuous Flow 25
Suit Continuous Flow (g)
2. Self-contained breathing Apparatus (SCBA):
Facepiece, full Demand (h) 100
Facepiece, full Pressure Demand (i) 10,000
Facepiece, full Demand, Recirculating (h)100
Facepiece, full Positive Pressure (i) 10,000
Recirculating
III. Combination Respirators: Any combination of air-purifying
Assigned protection factor for and atmosphere-supplying type
and mode of operation as respirators. listed above.
10CFR20 Appendix A
Assigned Protection Factors for Respirators (a)
I. Air Purifying Respirators [Particulate (b) only] (c):
Filtering facepiece disposable (d) Negative Pressure..... (d)
Facepiece, half (e) Negative Pressure 10
Facepiece, full Negative Pressure 100
Facepiece, half Powered air-purifying 50
Facepiece, full Powered air-purifying 1000
Helmet/hood Powered air-purifying 1000
Facepiece, loose-fitting Powered air-purifying 25
II. Atmosphere supplying respirators [particulate, gases and
vapors (f)]:
1. Air-line respirator:
Facepiece, half Demand 10
Facepiece, half Continuous Flow 50
Facepiece, half Pressure Demand 50
Facepiece, full Demand 100
Facepiece, full Continuous Flow 1000
Facepiece, full Pressure Demand 1000
Helmet/hood Continuous Flow 1000
Facepiece, loose-fitting Continuous Flow 25
Suit Continuous Flow (g)
2. Self-contained breathing Apparatus (SCBA):
Facepiece, full Demand (h) 100
Facepiece, full Pressure Demand (i) 10,000
Facepiece, full Demand, Recirculating (h)100
Facepiece, full Positive Pressure (i) 10,000
Recirculating
III. Combination Respirators: Any combination of air-purifying
Assigned protection factor for and atmosphere-supplying type
and mode of operation as respirators. listed above.
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