Summary

Chirkin AV Reducing the harmful effects of polluted air at workplaces using respiratory PPE

Measurements in the workplace showed that the average rates of protection of one employee (using the same respirator) may differ a hundred times on different days; and the average rates of protection of different employees (using exactly the same respirators) are very different. So, it is difficult to identify the causes of breathing polluted air workers, and prevents reasonable to require the issuance of more reliable respirators. The reason is that in some cases the proportion of workers using respirators insufficiently effective, such respirators provide protection yet.
Source: Wikisource

Chirkin AV Reducing the harmful effects of polluted air at workplaces using respiratory PPE

But respirator certification test participants, in principle, can not simulate all the enormous variety of movements that make millions of workers, and the limited number of such test participants can not accurately simulate all the different worker’s faces (shape and sizes) . In addition, in the laboratory, participants wear respirators’ masks more slowly and carefully. Therefore laboratory efficiency RPD (during the certification) is significantly different from the protective properties in actual use in the workplace. This real efficiency was measured in the developed countries tenfold.
Source: Wikisource

Chirkin AV Reducing the harmful effects of polluted air at workplaces using respiratory PPE

Therefore, the values PF (W) set on the basis of the results obtained are not in the laboratory but in actual workplace conditions during dozens studies respirators of different designs.
The table has no values PF (W) for the RF. The reason is that at the first attempt to entry into the WTO, when RF switched to a system of certification of respirators, similar to the European, requirements for the employer (regulating the right choice and organization of the use of RPE) is not developed, and they do not exist today. But that does not stop their production, certification, marketing and use.
Source: Wikisource

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