---identifier: "/us/cfr/t46/s174.195"source: "ecfr"legal_status: "authoritative_unofficial"title: "46 CFR § 174.195 - Bulkheads in machinery spaces."title_number: 46title_name: "Shipping"section_number: "174.195"section_name: "Bulkheads in machinery spaces."chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"subchapter_number: "S"subchapter_name: "SUBDIVISION AND STABILITY"part_number: "174"part_name: "SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES"positive_law: falsecurrency: "2026-04-05"last_updated: "2026-04-05"format_version: "1.1.0"generator: "[email protected]"authority: "42 U.S.C. 9118, 9119, 9153; 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. 0170.1. Section 174.180 also issued under sec. 617, Pub. L. 111-281, 124 Stat. 2905."regulatory_source: "CGD 79-023, 48 FR 51048, Nov. 4, 1983, unless otherwise noted."cfr_part: "174"---
Identifier
/us/cfr/t46/s174.195
Currency
2026-04-05
Positive Law
No
Updated
2026-04-05
Chapter
Coast Guard, Department of Homeland Security
Authority
42 U.S.C. 9118, 9119, 9153; 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. 0170.1. Section 174.180 also issued... 42 U.S.C. 9118, 9119, 9153; 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. 0170.1. Section 174.180 also issued under sec. 617, Pub. L. 111-281, 124 Stat. 2905.
# 174.195 Bulkheads in machinery spaces.(a) The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck.(b) Each penetration of, and each opening in, a bulkhead in a machinery space must—(1) Be kept as high and as far inboard as practicable; and(2) Except as provided by § 174.210 of this subpart and by paragraph (c) of this section, have means to make it watertight.(c) No penetration of a bulkhead in a machinery space by a ventilation duct need have means to make the bulkhead watertight if—(1) Every part of the duct is at least 760 millimeter (30 inches) from the side of the OSV; and(2) The duct is continuously watertight from the penetration to the main deck.(d) Each penetration of a bulkhead in a machinery space by piping must meet the design requirements for material and pressure in subchapter F of this chapter.