CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES (parts 150 to 155) > PART 153—SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS > SUBPART B—Design and Equipment (§153.190 to §153.812) > 153.233—Separation of tanks from machinery, service and other spaces.

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. 3

Code of Federal Regulations

Footnote(s): 3 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.