Section 153.525 - Special requirements for unusually toxic cargoesWhen Table 1 refers to this section a containment system must meet the following:
(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.(b) A cargo tank's relief valve setting must be not less than 21 kPa gauge (approx. 3 psig).(c) All cargo pumps and valves located below the weatherdeck must be operable from the weatherdeck.(d) A heat transfer system for the cargo must:(1) Be independent of other ship service systems, except for other cargo heat transfer systems, and not enter the engine room;(2) Be totally external to the cargo containment system; or(3) Be approved by the Commandant (CG-ENG) for use with toxic cargoes.(e) The cargo must be separated from any bunkers by at least two bulkheads.(f) A cargo containment system must have a vapor return connection.CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 21209, May 17, 1982; CGD 82-063b, 48 FR 4782, Feb. 3, 1983