Section 153.515 - Special requirements for extremely flammable cargoesWhen Table 1 refers to this section:
(a) An enclosed space containing a cargo tank must have an inerting system that meets the requirements in § 153.500 applying to the inert gas system of a containment system;(b) Cargo discharge pumps must be of a type that does not subject the shaft gland to the cargo under pressure or that is submerged; and(c) The cargo tank's relief valve setting must be no less than 21 kPa gauge (approx. 3 psig).