Design specifications for respiratory breathing devices for firefighters.
Burgess-WA; Sidor-R; Peterson-N; Lynch-JJ; Buchanan-P; Clougherty-E
NIOSH 1975 Sep; :1-79
The desired protective factor for self-contained breathing apparatus used in the fire service is proposed at 100 based on a series of tests with a personal air sampler which revealed maximum air concentrations of carbon-monoxide (630080) of approximately 20,000 ppm during fire fighting episodes. A series of 74 incidents were studied using a combustible gas detector modified to be specific for carbon-monoxide. The data are recorded on a cassette recorder using a voltage to frequency converter. A study of the respiratory minute volume during active work while wearing open-circuit, self-contained breathing apparatus indicated a median value of 60 liters per minute and 70 liters for the 80 percentile group. If the device is to have a service life of 30 minutes, the stored air capacity must be 1800 liters, and 2100 liters for the median and 80 percentile values respectively.
NIOSH-Contract; Contract-099-72-0021; Toxic-gases; Measurement-instrumentation; Air-contamination; Respiratory-protective-equipment; Firemen; Fire-fighting
NTIS Accession No.
(NIOSH) 76-121; Contract-099-72-0021
National Institute for Occupational Safety and Health