46 CFR § 197.312 - Breathing supply hoses.

---
identifier: "/us/cfr/t46/s197.312"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 197.312 - Breathing supply hoses."
title_number: 46
title_name: "Shipping"
section_number: "197.312"
section_name: "Breathing supply hoses."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "V"
subchapter_name: "MARINE OCCUPATIONAL SAFETY AND HEALTH STANDARDS"
part_number: "197"
part_name: "GENERAL PROVISIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
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."
regulatory_source: "CGD 76-009, 43 FR 53683, Nov. 16, 1978, unless otherwise noted."
cfr_part: "197"
---


# 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) 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.