CFR > Title 42 - Public Health > CHAPTER I—PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER G—OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES (parts 80 to 87) > PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES > SUBPART F—Classification of Approved Respirators; Scope of Approval; Atmospheric Hazards; Service Time (§84.50 to §84.53) > 84.51—Entry and escape, or escape only; classification.

84.51—Entry and escape, or escape only; classification.

Respirators described in subparts H through L of this part shall be classified for use as follows:
(a) Entry and escape. Respirators designed and approved for use during entry into a hazardous atmosphere, and for escape from a hazardous atmosphere; or
(b) Escape only. Respirators designed and approved for use only during escape from a hazardous atmosphere.