46 C.F.R. § 64.91 Relief valve for the cargo pump discharge.
Title 46 - Shipping
The cargo pump discharge must have a relief valve that is— (a) Fitted between the cargo pump discharge and the shut-off valve, with the relief valve discharge piped back to the cargo pump suction or returned to the tank; and (b) Set at the maximum design pressure of the piping and discharge hose, or less.
Title 46: Shipping
PART 64—MARINE PORTABLE TANKS AND CARGO HANDLING SYSTEMS
Subpart F—Cargo Handling System
§ 64.91 Relief valve for the cargo pump discharge.
