46 CFR § 109.555 - Propulsion boilers.

---
identifier: "/us/cfr/t46/s109.555"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 109.555 - Propulsion boilers."
title_number: 46
title_name: "Shipping"
section_number: "109.555"
section_name: "Propulsion boilers."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "I-A"
subchapter_name: "A—MOBILE OFFSHORE DRILLING UNITS"
part_number: "109"
part_name: "OPERATIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "43 U.S.C. 1333; 46 U.S.C. 3306, 6101, 10104; DHS Delegation 00170.1, Revision No. 01.4."
regulatory_source: "CGD 73-251, 43 FR 56828, Dec. 4, 1978, unless otherwise noted."
cfr_part: "109"
---


# 109.555 Propulsion boilers.

The master or person in charge and the engineer in charge shall ensure that—

(a) Steam pressure does not exceed that allowed by the certificate of inspection; and

(b) The safety valves, once set, are not tampered with or made inoperative.

[CGD 73-251, 43 FR 56828, Dec. 4, 1978, as amended by CGD 95-028, 62 FR 51208, Sept. 30, 1997]