Personal respiratory protection
The workers included in the cabin periodically and briefly (except for repair, but at this time of the production process stops and the hazard does not stand out) and use the tools of personal respiratory protection. Masks with feeding them fresh air are applied in the presence of gases not absorbed by the industrial respirators, such as carbon monoxide.
Applying a respirator, the worker can move freely within the cabin. If he wears a mask in which air is forcibly fed hose movement of the working fettered and limited length of hose. Usually longer than 10-15 m hose is not being done. This and are limited by the size of the cabin.
However, even with the free movement of the working cab sizes are limited to the following considerations. When any accident with a respirator (or equipment) the worker must quickly get out. The presence in the cabin areas and stairs for her considerable height in any way can not be recommended, especially when using masks with hoses. Ladders should be placed outside the cabin and cockpit at high altitude it should have several doors at several elevations.
Using masks with hoses can not be considered safe, especially in the cockpit instrumentation saturated with protruding parts (flanges, valves, bolts). With hasty exit from the cockpit hose can get caught on protruding parts and tear the mask from the face of the worker. Substantially more rational use of devices proposed by the author in 1957, such as scuba diving. A man carries a tank, light alloy or plastic with compressed air.
As stated above, cabin ventilated. Most-hood is the general exchange on zonal basis. However, in some cases, the rational use local pumps, such as casings of devices, from the glands of pumps, etc. This is done to reduce air and reduce the concentration of harmful substances in the cab.
Extraction, serving the cabin, usually have redundant fans. This is necessary because in case of accident, the exhaust fan in the cabin can be formed as a high concentration of harmful substances that the service it would be unsafe, especially in the presence of explosive gases or vapors. In addition, not no risk breaking unhealthy in clean rooms.