46 C.F.R. § 162.018-7 Flow rating tests.
Title 46 - Shipping
(a) Flow rating of valves shall be conducted in accordance with UG–131 of section VIII of the ASME Code, S–1.2.5.2 of the Compressed Gas Association Standards, or other procedure approved by the Commanding Officer, USCG Marine Safety Center. (b) [Reserved] [CGFR 68–82, 33 FR 18908, Dec. 18, 1968, as amended by USCG 2001–10224, 66 FR 48620, Sept. 21, 2001]
Title 46: Shipping
PART 162—ENGINEERING EQUIPMENT
Subpart 162.018—Safety Relief Valves, Liquefied Compressed Gas
§ 162.018-7 Flow rating tests.

