46 CFR § 197.452 - Oxygen cleaning.

---
identifier: "/us/cfr/t46/s197.452"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 197.452 - Oxygen cleaning."
title_number: 46
title_name: "Shipping"
section_number: "197.452"
section_name: "Oxygen cleaning."
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"
---


# 197.452 Oxygen cleaning.

The diving supervisor shall ensure that equipment used with oxygen or oxygen mixtures greater than 40 percent by volume is cleaned of flammable materials—

(a) Before being placed into service; and

(b) After any repair, alteration, modification, or suspected contamination.