French
DeutschFile:Workplace Protection Factors of full face masks.jpg
Size of this preview: 800 × 484 pixels. Other resolutions: 320 × 194 pixels | 640 × 388 pixels | 1,024 × 620 pixels | 1,280 × 775 pixels | 2,028 × 1,228 pixels.
Original file (2,028 × 1,228 pixels, file size: 319 KB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description | Русский: Коэффициенты защиты респираторов - трёх сертифицированных в Великобритании полнолицевых масок с противоаэрозольными фильтрами высокой эффективности. Выявленные случаи просачивания большого количества неотфильтрованного воздуха через зазоры между маской и лицом стали основанием для более жёсткого ограничения области допустимого применения СИЗОД этого типа - ограничение снизили с 900 ПДКрз до 40 ПДКрз (Великобритания). Использованы значения коэффициентов защиты из: The Annals of Occupational Hygiene (1990) Vol. 34(6) pp. 541–552. doi:10.1093/annhyg/34.6.547 English: Results of respirator Workplace Protection Factors (WPF) measurement. Workers used three approved HSE negative pressure full face masks. Minimal values of WPF for each models were 11, 17 and 26. These results are made strictly limit the scope of permissible use of such respirators - from 900 to 40 OEL (in BS 4275-1997). Source: The Annals of Occupational Hygiene (1990) Vol. 34(6) pp. 541–552. doi:10.1093/annhyg/34.6.547 |
| Date | |
| Source | Own work |
| Author | AlexChirkin |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
  | This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
|
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:33, 17 June 2016 | | 2,028 × 1,228 (319 KB) | AlexChirkin | User created page with UploadWizard |
File usage
The following page uses this file:
