An official website of the United States government.
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
| # | Letters of Interpretation |
|---|---|
| 1 | - 1910.134(d)(3)(i)(A) - Use of powered-air purifying respirators (PAPR) for welding operations and assigned protection factor |
| 2 | - 1910.134(d)(3)(i)(A) - APF for the combination pressure-demand, full-facepiece SAR with auxiliary SCBA |
| 3 | - 1910.134(d)(3)(i)(A) - Protection factors for respirators used in pharmaceutical industry: policy change. |
| # | Regulations |
|---|---|
| 1 | - - Respiratory protection. |
