46 CFR § 38.10-5 - Filling and discharge pipes - TB/ALL.
(a) Filling and discharge connections shall be provided with the manually operated valve required by § 38.10-1(i) and with a positive acting remote controlled quick-closing valve. The remote controlled quick-closing valve shall satisfy the requirements of § 38.10-1(j).
(b) For pressure vessel type tanks the remote controlled quick-closing valves shall be located on the inside of the tank or on the outside where the piping enters the tank. For pressure vessel type tanks operating at low pressure and with service temperature near the cargo atmospheric boiling point, the Commandant may approve individual installations where these valves are located at the loading and discharge headers.
(c) For nonpressure vessel type tanks the remote controlled quick-closing valves may be located at the loading and discharge headers.
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