Piping structure for oil tanker

Abstract

An ore/coal carrier is provided with piping passages 42 of watertight structure and of substantially rectangular cross section. The passage is located between longitudinal bulkheads 32 and cargo hatches 38 , and extends within an upper portion of central cargo oil tanks 34 . Two of cargo oil delivery pipes 50 leading from a pump room to a shore connection 48 at midship portion of a hull are passed through a starboard piping passage, and the remaining one is passed through a port passage. The starboard passage extends up to the central portion of the hull, however, the port one extends close up to a bow, and an inert gas pipe 58 is passed through in the port passage.

1 . A piping structure for an oil tanker comprising:
 a piping passage longitudinally extending inside a hull of the tanker, said passage being surrounded by watertight structures and particularly an inside top portion thereof being formed by the upper deck; and   a cargo delivery pipe being run through said passage, said delivery pipe interconnecting a pump room at an aft portion of the hull and a shore-connection provided amidship on the upper deck.   
   
   
       2 . A piping structure defined in  claim 1  wherein said piping passage is extended to a bow portion of the hull and houses an inert gas pipe therein for delivering an inert gas from an inert gas generator disposed in an aft portion of the hull to each cargo oil tank. 
   
   
       3 . A piping structure defined in  claim 1  or  2  further comprising:
 a longitudinal bulkhead extending to divide an inside space of the hull into a plurality of cargo oil tanks; and   said piping passage extending along and in contact with said longitudinal bulkheads, one side of said passage being formed by said longitudinal bulkhead.   
   
   
       4 . A piping structure defined in  claim 1  or  2  further comprising:
 cargo hatches for loading solid cargo disposed on the upper deck; and   hatch side girders attached to a lower side of the upper deck in the manner to pass along each side of said cargo hatches, said girders each forming one side of said passage.   
   
   
       5 . A piping structure defined in  claim 1  or  2  further comprising:
 side ballast tanks being provided in the hull; and   said piping passage being disposed in contact with said side ballast tanks, and one side of said passage being formed by an inner wall of said side ballast tank.   
   
   
       6 . A piping structure for oil tanker defined in  claim 1  or  2  wherein the size of said passage is such as to allow men to pass through. 
   
   
       7 . A piping structure for oil tanker defined in  claim 1  or  2  wherein said passage is provided with a plurality of doorways leading up to the upper deck.