---
kind: "section"
citation: "42 C.F.R. § 84.254"
title: "42"
number: "84.254"
heading: "Powered air-purifying respirators; requirements and tests."
url: "https://uscodex.org/cfr/42/84.254"
---

# §84.254. Powered air-purifying respirators; requirements and tests.

- (a) Except for the tests prescribed in [§ 84.207](/cfr/42/84.207.md), the minimum requirements and performance tests for powered air-purifying respirators prescribed in [subpart L](/cfr/42/subpartL.md) of this part are applicable to vinyl chloride powered air-purifying respirators.
- (b) The following bench tests are applicable to cartridges designed for use with powered air-purifying respirators for entry into and escape from vinyl chloride atmospheres containing adequate oxygen to support life:
  - (1) Four cartridges will be equilibrated at 25 ±°C by passing 85 ±5 percent relative humidity air through them at 115 liters per minute for tight-fitting facepieces and 170 liters per minute for loose-fitting hoods and helmets, for six hours.
  - (2) The equilibrated cartridges will be resealed, kept in an upright position at room temperature and tested according to [paragraph (b)(3)](#b-3) of this section within 18 hours.
  - (3) The cartridges equilibrated and stored as described in [paragraphs (b)](#b) (1) and (2) of this section will be tested on an apparatus that allows the test atmosphere at 85 ±5 percent relative humidity and 25 ±5 °C to enter the cartridge continuously at a concentration of 25 ppm vinyl chloride monomer at a total flow rate of 115 liters per minute for tight-fitting facepieces and 170 liters per minute for loose-fitting hoods and helmets.
  - (4) The maximum allowable penetration after six hours of testing according to [paragraph (b)(3)](#b-3) of this section shall not exceed 1 ppm vinyl chloride.

## Notes

### Authority

Authority: 29 U.S.C. 651 et seq.; 30 U.S.C. 3, 5, 7, 811, 842(h), 844.

### Source

Source: 60 FR 30355, June 8, 1995, unless otherwise noted.