StacksVerified U.S. regulatory reference

46 CFR §154.405

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The design vapor pressure (Po) of a cargo tank must be equal to or greater than the MARVS.
  2. (b)The Po of a cargo tank must be equal to or greater than the vapor pressure of the cargo at 45 °C (113 °F) if:
    1. (1)The cargo tank has no temperature control for the cargo; and
    2. (2)The vapor pressure of the cargo results solely from ambient temperature.
  3. (c)The Po of a cargo tank may be exceeded under harbor conditions if specially approved by the Commandant (CG-ENG).