---
kind: "section"
citation: "42 C.F.R. § 84.152"
title: "42"
number: "84.152"
heading: "Breathing tube test; minimum requirements."
url: "https://uscodex.org/cfr/42/84.152"
---

# §84.152. Breathing tube test; minimum requirements.

- (a)
  - (1) Type A and Type B supplied-air respirators shall employ one or two flexible breathing tubes of the nonkinking type which extend from the facepiece to a connecting hose coupling attached to the belt or harness.
  - (2) The breathing tubes employed shall permit free head movement, insure against closing off by kinking or by chin or arm pressure, and they shall not create a pull that will loosen the facepiece or disturb the wearer.
- (b) Breathing tubes employed on Type C supplied-air respirators of the continuous flow class shall meet the minimum requirements set forth in [paragraph (a)](#a) of this section, however, an extension of the connecting hose may be employed in lieu of the breathing tubes required.
- (c)
  - (1) **A flexible, nonkinking type breathing tube shall—**
    - (i) Be employed on Type C supplied-air respirators of the demand and pressure-demand class; and
    - (ii) Extend from the facepiece to the demand or pressure-demand valve, except where the valve is attached directly to the facepiece.
  - (2) The breathing tube shall permit free head movement, insure against closing off by kinking or by chin or arm pressure, and shall not create a pull that will loosen the facepiece or disturb the wearer.

## 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.