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Approved Dust Respirators for Coal Mines.
NTIS: PB 200 053 :7 pages
This publication lists and describes devices approved jointly by the Secretary of the Interior and the Secretary of Health, Education, and Welfare, under the provisions of SS 70.300-1, Part 70, Subchapter O of Chapter I, Title 30, Code of Federal Regulations (35 F.R. 5548, April 3, 1970), for use as respiratory protection against respirable pneumoconiosis-producing dusts. Included are type C supplied-air respirators approved under Bureau of Mines schedule 19b and dust, fume, and mist respirators approved under Bureau of Mines Schedule 21B.
IH; Information Circular;
NTIS Accession No.
NTIS: PB 200 053
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division