46 C.F.R. § 154.516 Piping: Hull protection.
Title 46 - Shipping
A vessel's hull must be protected from low temperature liquid leakage by a drip pan, or other means specially approved by the Commandant (G-MSO), at: (a) Each piping connection dismantled on a routine basis; (b) Cargo discharge and loading manifolds; and (c) Pump seals. [CGD 74–289, 44 FR 26009, May 3, 1979, as amended by CGD 82–063b, 48 FR 4782, Feb. 3, 1983]
Title 46: Shipping
PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES
Subpart C—Design, Construction and Equipment
Cargo and Process Piping Systems
§ 154.516 Piping: Hull protection.

