11. Ship Systems 11.01 Ballast and Bilge System. Drainage Outside of Accommodation Ballast system All pipes in the system to be hot galvanized seamless steel pipes. The arrangement shall be that the general service pump is used to fill up seawater ballast tank through special valve block. To discharge ballast water from the tank bilge pump will be used. Location of the system will be in aft engine room. Bilge system Pipes in bilge system of hot galvanized seamless steel pipes. The system shall be dimensioned according to flag state regulation and class. Layout and number of wells and branches arranged according to GA plan. The system shall be arranged through a non-return valve, which shall be located in aft engine room. Strainer box on suction side of pump with mesh size 3 mm. Mud box shall have a quickly released top for easy changing of strainer. Vertical pump of centrifugal type installed. Level alarm to be installed in engine room, processing, and hold bilge wells. Bilge wells in the processing area In the bilge wells in the lower processing area to be installed offal pumps with “open” impeller of make “Allweiler”, “Desmi”, “Iron”, or “Flight”. Six (6) off 8” pumps and four (4) off 6” pumps, each pump to be equipped with automatic start-stop and high level alarms see above (controlled by pressostats from “Danfoss”). Bronze overboard valves and acid-resistant stem. One (1) approx. 1” submersible pump with automatic level control switch is to be installed in one of the aft bilge wells in the hold. Drainage ND 50 to be arranged from bridge four (4) pipes, forecastle deck six (6) ND 65 pipes. Freeing ports to be according to rules of flag state. Drainage from casing, store rooms etc. to be arranged. Pump to be installed to pump between the seawater tanks in the stern. The pump is to have about 40 m3/h capacity and to be controlled from the wheelhouse. Oily bilge separator An oily bilge separator shall be arranged with one engine suction and suction from the bilge chest, with discharge to overboard (clean water) and to the sludge tank. The capacity shall be according to rules, and equipment according to DNV and Marpol 73/78. Fresh water flushing of the bilge pumps and oily bilge separator to be provided.
70
Álasund Ltd. // Your world wide shipping connection