46 CFR § 54.10-3 - Marine inspectors and Coast Guard Symbol stamping (replaces UG-90 and UG-91, and modifies UG-92 through UG-103).

---
identifier: "/us/cfr/t46/s54.10-3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 54.10-3 - Marine inspectors and Coast Guard Symbol stamping (replaces UG-90 and UG-91, and modifies UG-92 through UG-103)."
title_number: 46
title_name: "Shipping"
section_number: "54.10-3"
section_name: "Marine inspectors and Coast Guard Symbol stamping (replaces UG-90 and UG-91, and modifies UG-92 through UG-103)."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "F"
subchapter_name: "MARINE ENGINEERING"
part_number: "54"
part_name: "PRESSURE VESSELS"
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; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.3."
regulatory_source: "CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by USCG-2020-0634, 89 FR 50104, June 12, 2024, unless otherwise noted."
cfr_part: "54"
---


# 54.10-3 Marine inspectors and Coast Guard Symbol stamping (replaces UG-90 and UG-91, and modifies UG-92 through UG-103).

(a) Only marine inspectors will apply the Coast Guard Symbol. They will not apply any other code symbol to pressure vessels.

(b) All pressure vessels not exempted under provisions of § 54.01-15 must be subject to shop inspection by a marine inspector referring to procedures outlined in UG-92 through UG-103 of Section VIII of the ASME BPVC (incorporated by reference; see § 54.01-1) and §§ 50.30-10, 50.30-15, and 50.30-20 of this subchapter. The marine inspector will then stamp the vessel with the Coast Guard Symbol.

(c) Pressure vessels exempted under provisions of § 54.01-15, except as provided in paragraph (d) of this section, are not required to be stamped with the Coast Guard Symbol.

(d) Pressure vessels described in § 54.01-5(c)(3), except pressure vessels in systems regulated under subpart 58.60 of this subchapter, must be visually examined by a marine inspector prior to installation. The marine inspector also reviews the associated plans and manufacturers' data reports. If, upon inspection, the pressure vessel complies with the applicable requirements in § 54.01-5, the marine inspector stamps the pressure vessel with the Coast Guard Symbol.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 77-147, 47 FR 21810, May 20, 1982; USCG-2003-16630, 73 FR 65167, Oct. 31, 2008]