---
kind: "section"
citation: "46 C.F.R. § 197.312"
title: "46"
number: "197.312"
heading: "Breathing supply hoses."
url: "https://uscodex.org/cfr/46/197.312"
---

# §197.312. Breathing supply hoses.

- (a) **Each breathing supply hose must—**
  - (1) **Have a maximum working pressure that is equal to or exceeds—**
    - (i) The maximum working pressure of the section of the breathing supply system in which used; and
    - (ii) The pressure equivalent of the maximum depth of the dive relative to the supply source plus 100 psig;
  - (2) Have a bursting pressure of four times its maximum working pressure;
  - (3) **Have connectors that—**
    - (i) Are made of corrosion-resistant material;
    - (ii) Are resistant to accidental disengagement; and
    - (iii) Have a maximum working pressure that is at least equal to the maximum working pressure of the hose to which they are attached; and
  - (4) **Resist kinking by—**
    - (i) Being made of kink-resistant materials; or
    - (ii) **Having exterior support.**
- (b) **Each umbilical must—**
  - (1) Meet the requirements of [paragraph (a)](#a) of this section; and
  - (2) Be marked from the diver or open bell end in 10-foot intervals to 100 feet and in 50-foot intervals thereafter.

## Notes

### Authority

Authority: 33 U.S.C. 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 3703, 6101; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 76-009, 43 FR 53683, Nov. 16, 1978, unless otherwise noted.