46 C.F.R. § 154.532 Valves: Cargo tank MARVS greater than 69 kPa gauge (10 psig).
Title 46 - Shipping
(a) Except connections for tank safety relief valves and except for liquid level gauging devices other than those under §§154.536 and 154.1310, liquid and vapor connections on a cargo tank with a MARVS greater than 69 kPa gauge (10 psig) must have, as close to the tank as practical, a: (1) Stop valve capable of local manual operation; and (2) A remotely controlled quick-closing shut-off valve. (b) If the nominal pipe size of a liquid or vapor connection is less than 50 mm (2 in.), an excess flow valve may be substituted for the quick-closing valve under paragraph (a) of this section. (c) One valve may be substituted for the manual controlled stop valve and the remotely controlled quick-closing shut-off valve required under paragraph (a) of this section if that valve: (1) Meets §§154.540 and 154.544; and (2) Is capable of local manual operation.
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
§ 154.532 Valves: Cargo tank MARVS greater than 69 kPa gauge (10 psig).
