46 CFR § 143.545 - Pressure vessels.

---
identifier: "/us/cfr/t46/s143.545"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 143.545 - Pressure vessels."
title_number: 46
title_name: "Shipping"
section_number: "143.545"
section_name: "Pressure vessels."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "M"
subchapter_name: "TOWING VESSELS"
part_number: "143"
part_name: "MACHINERY AND ELECTRICAL SYSTEMS AND EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 CFR 1.05; DHS Delegation No. 0170.1."
regulatory_source: "USCG-2006-24412, 81 FR 40101, June 20, 2016, unless otherwise noted."
cfr_part: "143"
---


# 143.545 Pressure vessels.

(a) In lieu of meeting the requirements of § 143.300, pressure vessels installed on new towing vessels must meet the requirements of this section.

(b) Pressure vessels over 5 cubic feet in volume and more than 15 psi maximum allowable working pressure must meet ABS Rules for Building and Classing Steel Vessels under 90 Meters (295 Feet) in Length (incorporated by reference, see § 136.112 of this subchapter), Part 4, Chapter 1, Section 1.