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Determination of Respirator Filtering Requirements in a Coke Oven Atmosphere.

Rodgers SJ; Friel JV; Roehlich F

MSA Research Corporation, Evans, City, Pennsylvania 1975 Sep:62 pages

00050689

Dust, mist and fume respirator filter media approved under 30 CFR 11, subpart-K are tested in a coke oven environment containing carbon-monoxide (630080), nitric-oxide (10102440), nitrogen dioxide, and sulfur-dioxide (7446095). Five different types of filter media are evaluated for a total of 45 tests, the efficiency being based on the respirable particulate fraction of the coke oven emissions. Four of the five filter media tested show efficiencies greater than 95 percent. The other media show an efficiency of 93.8 percent. The particulate concentration downstream of the respirator filter media is less than 0.3 milligram per cubic meter in all cases. The gases which are monitored exceed the threshold limit values (TLV) during some of the charging operations. Time weighted average values are found to be less than the TLV in all of the runs.

NIOSH-Contract; Contract-099-74-0088; Toxic-gases; Filtration; Air-contamination; Air-quality-control; Respiratory-protective-equipment;

630-08-0; 10102-44-0; 7446-09-5;

19750901

Contract;

1975

PB-276345

A05

Contract-099-74-0088

MSA Research Corporation, Evans, City, Pennsylvania

PA;