46 CFR § 128.230 - Penetrations of hulls and watertight bulkheads—materials and pressure design.

---
identifier: "/us/cfr/t46/s128.230"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 128.230 - Penetrations of hulls and watertight bulkheads—materials and pressure design."
title_number: 46
title_name: "Shipping"
section_number: "128.230"
section_name: "Penetrations of hulls and watertight bulkheads—materials and pressure design."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "L"
subchapter_name: "OFFSHORE SUPPLY VESSELS"
part_number: "128"
part_name: "MARINE ENGINEERING: EQUIPMENT AND SYSTEMS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3306; sec. 617, Pub. L. 111-281, 124 Stat. 2905; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGD 82-004 and CGD 86-074, 62 FR 49331, Sept. 19, 1997, unless otherwise noted."
cfr_part: "128"
---


# 128.230 Penetrations of hulls and watertight bulkheads—materials and pressure design.

(a) Each piping penetration, in each bulkhead required by this subchapter to be watertight, must meet the requirements for materials and pressure design of subchapter F of this chapter.

(b) Each overboard discharge and shell connection, up to and including required shut-off valves, must meet the requirements for materials and pressure design of subchapter F of this chapter.