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Title 42

Displaying title 42, up to date as of 7/20/2026. Title 42 was last amended 7/20/2026.
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Title 42Public HealthPart / Section
Chapter IPublic Health Service, Department of Health and Human Services2 – 199
Subchapter GOccupational Safety and Health Research and Related Activities80 – 88
Part 84Approval of Respiratory Protective Devices84.1 – 84.311
Subpart HSelf-Contained Breathing Apparatus84.70 – 84.104
§ 84.70Self-contained breathing apparatus; description.
§ 84.71Self-contained breathing apparatus; required components.
§ 84.72Breathing tubes; minimum requirements.
§ 84.73Harnesses; installation and construction; minimum requirements.
§ 84.74Apparatus containers; minimum requirements.
§ 84.75Half-mask facepieces, full facepieces, mouthpieces; fit; minimum requirements.
§ 84.76Facepieces; eyepieces; minimum requirements.
§ 84.77Inhalation and exhalation valves; minimum requirements.
§ 84.78Head harnesses; minimum requirements.
§ 84.79Breathing gas; minimum requirements.
§ 84.80Interchangeability of oxygen and air prohibited.
§ 84.81Compressed breathing gas and liquefied breathing gas containers; minimum requirements.
§ 84.82Gas pressure gages; minimum requirements.
§ 84.83Timers; elapsed time indicators; remaining service life indicators; minimum requirements.
§ 84.84Hand-operated valves; minimum requirements.
§ 84.85Breathing bags; minimum requirements.
§ 84.86Component parts exposed to oxygen pressures; minimum requirements.
§ 84.87Compressed gas filters; minimum requirements.
§ 84.88Breathing bag test.
§ 84.89Weight requirement.
§ 84.90Breathing resistance test; inhalation.
§ 84.91Breathing resistance test; exhalation.
§ 84.92Exhalation valve leakage test.
§ 84.93Gas flow test; open-circuit apparatus.
§ 84.94Gas flow test; closed-circuit apparatus.
§ 84.95Service time test; open-circuit apparatus.
§ 84.96Service time test; closed-circuit apparatus.
§ 84.97Test for carbon dioxide in inspired gas; open- and closed-circuit apparatus; maximum allowable limits.
§ 84.98Tests during low temperature operation.
§ 84.99Man tests; testing conditions; general requirements.
§ 84.100Man tests 1, 2, 3, and 4; requirements.
§ 84.101Man test 5; requirements.
§ 84.102Man test 6; requirements.
§ 84.103Man tests; performance requirements.
§ 84.104Gas tightness test; minimum requirements.