46 C.F.R. § 64.51 Tank parts marking.
Title 46 - Shipping
Any part of a tank furnished by an outside supplier may not be used in a tank unless it bears— (a) The Coast Guard symbol; (b) The Marine Inspection Office identification letters; (c) The word “part”; (d) The manufacturer's name and serial number; and (e) The design pressure.
Title 46: Shipping
PART 64—MARINE PORTABLE TANKS AND CARGO HANDLING SYSTEMS
Subpart B—Standards for an MPT
§ 64.51 Tank parts marking.
