CFR /  Title 46  /  Part 153  /  Sec. 153.280 Piping system design.

(a) Each cargo piping system must meet the standards of Part 56 and Sec. Sec. 38.10-1(b), 38.10-1(e), and 38.10-10(a) of this chapter.

(b) Piping carrying cargo or cargo residue may not enter any machinery space except a cargo pumproom.