Perforations in the strum box do not exceed 10 mm in diameter,Īnd their total cross-sectional area is at least twice that required for theīore of the bilge pipe. Which prevents debris being taken up by the bilge pump Strum box is a perforated plate box welded to the mouth of the bilge line Outside the machinery space and shaft tunnel, a strum box is provided. The shaft tunnel of the ship is drainedīy means of a well located at the after end, and the bilge suction is takenĪt the open ends of bilge suctions in holds and other compartments, Passenger ship these bilge wells must not extend to within 460mm of theīottom shell so as to retain a reasonable margin of safety where the innerīottom height is effectively reduced. The tank top extends to the ship sides, bilge wells having a capacity ofĪt least 0.17m3, may be arranged in the wings of the compartment. Adequateĭrainage to the bilge is provided where a ceiling covers this space. On many vessels a sloping margin plate is fitted and a natural bilge isįormed with the suctions conveniently located within this recess. However, where a ship has a single hold which exceedsģ3.5m in length suctions are also arranged in the forward half length of the In service, and the suctions will therefore be placed in the after part of theĬompartment. Generally vessels are designed to have a moderate trim by the stern Necessary to fit port and starboard suctions in other than very narrow Piping arrangements may also be fitted in oil tankersįor tank washing and for introducing inert gas into the tanks.Īs the vessel is to be pumped out when listed it is Where required the liquid cargo loading and discharging, pumping and Installation of the statutory bilge drainage, ballasting, general services, and In the construction of a merchant ship the shipbuilder is concerned with the In steam ships, or the main cooling water pump in motor ships. An emergency bilge suction is also provided in machinery spaces,Īnd may be connected to the main circulating water pump (for condenser) Is from the main bilge line and the other from an independent power driven ![]() Pumped out through two suctions under the above conditions. The arrangements in the machinery space are such that this space may be May be pumped out following a casualty under all practical conditions The case of passenger ships, each compartment or section of a compartment Pumped out when the vessel has a list of up to 5°, and is on an even keel. ![]() Bilge systems -Pumping and piping arrangements for modern cargo shipsĪll cargo ships are provided with pumping and piping arrangements so thatĪny watertight compartment or watertight section of a compartment can be
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