46 CFR § 153.233 - Separation of tanks from machinery, service and other spaces.
---identifier: "/us/cfr/t46/s153.233"source: "ecfr"legal_status: "authoritative_unofficial"title: "46 CFR § 153.233 - Separation of tanks from machinery, service and other spaces."title_number: 46title_name: "Shipping"section_number: "153.233"section_name: "Separation of tanks from machinery, service and other spaces."chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"subchapter_number: "O"subchapter_name: "CERTAIN BULK DANGEROUS CARGOES"part_number: "153"part_name: "SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS"positive_law: falsecurrency: "2026-04-05"last_updated: "2026-04-05"format_version: "1.1.0"generator: "[email protected]"authority: "46 U.S.C. 3703; Department of Homeland Security Delegation No. 0170.1. Section 153.40 issued under 49 U.S.C. 5103. Sections 153.470 through 153.491, 153.1100 through 153.1132, and 153.1600 through 153.1608 also issued under 33 U.S.C. 1903 (b)."regulatory_source: "CGD 73-96, 42 FR 49027, Sept. 26, 1977, unless otherwise noted."cfr_part: "153"---
Identifier
/us/cfr/t46/s153.233
Currency
2026-04-05
Positive Law
No
Updated
2026-04-05
Chapter
Coast Guard, Department of Homeland Security
Authority
46 U.S.C. 3703; Department of Homeland Security Delegation No. 0170.1. Section 153.40 issued under 49 U.S.C. 5103. Sections 153.470 through 153.491, 153.1100 through 153.1132, and 153.1600 through 153... 46 U.S.C. 3703; Department of Homeland Security Delegation No. 0170.1. Section 153.40 issued under 49 U.S.C. 5103. Sections 153.470 through 153.491, 153.1100 through 153.1132, and 153.1600 through 153.1608 also issued under 33 U.S.C. 1903 (b).
# 153.233 Separation of tanks from machinery, service and other spaces.(a) To prevent leakage through a single weld failure, the following spaces must be separated from a cargo by two walls, two bulkheads, or a bulkhead and a deck not meeting in a cruciform joint:(1) Machinery spaces.(2) Service spaces.(3) Accommodation spaces.(4) Spaces for storing potable domestic, or feed water.(5) Spaces for storing edibles.(b) Some examples of arrangements that may separate cargo from the spaces listed in paragraph (a) of this section are the following:(1) Dedicated ballast tanks.(2) Cargo pumprooms.(3) Ballast pumprooms.(4) Tanks not carrying a cargo listed in this part. <sup>3</sup>[^]<sup>3</sup> See also §§ 32.56-5 and 32.60-10 of this chapter for limitations on the stowage of combustible liquids adjacent to ignition sources.(5) A cofferdam aft of the cargo containment systems and whose forward bulkhead is forward of any joint common to an accommodations space and the deck.(6) Double walled piping or a piping tunnel.