StacksVerified U.S. regulatory reference

46 CFR §153.525

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When Table 1 refers to this section a containment system must meet the following:
  1. (a)Cargo piping and venting systems must be designed so that they can be separated from any containment system endorsed for a cargo not covered by this section.
  2. (b)A cargo tank's relief valve setting must be not less than 21 kPa gauge (approx. 3 psig).
  3. (c)All cargo pumps and valves located below the weatherdeck must be operable from the weatherdeck.
  4. (d)A heat transfer system for the cargo must:
    1. (1)Be independent of other ship service systems, except for other cargo heat transfer systems, and not enter the engine room;
    2. (2)Be totally external to the cargo containment system; or
    3. (3)Be approved by the Commandant (CG-ENG) for use with toxic cargoes.
  5. (e)The cargo must be separated from any bunkers by at least two bulkheads.
  6. (f)A cargo containment system must have a vapor return connection.