Bilge and Ballast System on cargo ships.pptx

bilge and ballast systems on board cargo vessels explanation for GME and ETO course training.

1. L100 – Bilge n Ballast System Typical arrangement & Emergency bilge system

2. What is BILGE ????

3. Bilge means rubbish. In our context, bilge water means drainage or leakage water, dirty water, oily water. Bilge collection area is called a Bilge Well.

4. Bilge Area: Lowest compt of the ship, where the two sides meet at the keel. Bilge is the rounded portion of a ship’s hull, forming a transition between the bottom and the sides.

5. Cylinder Head Platform Intermediate Platform Bottom Platform Tank Top

6. Bilge water is found on all ships & contains – W ater Oily water Sludge D etergents Solvents, Chemicals D ust particles Discharge of bilge liquids from engine room is restricted & regulated for all ships under Marpol Annex I.

7. The size, number of bilge wells depends on Ship's size Capacity A mount of bilge water generated B ilge well is a residue collection space of E ngine room S teering gear room C argo hold Chain locker Bilge Water Holding Tank, BWHT, means tank for oily bilge water, Cap 25 cbm abt

8. Oily waste means - O il residues S ludge O ily bilge water Namely, S eparated sludge results from purification of fuel, lubricating oil. D rain and leakage oil, means oil from drainages and leakages in machinery space. E xhausted oils, means LO/hydraulic oils that unsuitable for use due to deterioration and contamination.

9. Sludge tank means: T anks for separated sludge D rain and leakage oil tanks E xhausted oil tanks Approximately 2 to 3 cbm capacity.

10. On a ship there are four types of bilges - E/R bilges Steering gear room bilges Cargo H old b ilges Chain L ocker bilges Bilge Water - The word used to describe the water that collects in this area. C ollected water must be pumped out to prevent the bilge from becoming too full and threatening to the ship.

11. Engine Room Bilge Wells

12. Steering Gear Room Bilges

13. Cargo Hold Bilge

14. Cargo Hold Bilge Wells - P & S (Aft) Top Top side tank or Wing Tank

15. Chain Locker Bilge Well P & S

16. Arrangement of Bilge Main System Bilge system must be able drain any space/tank containing oil/oily water and discharge the contents overboard. N umber of pumps & capacity depend upon the size, type and service of the vessel. All bilge suctions are fitted with strainers called mud box, positioned at floor plate level for easy access .

17. Mud box is fitted on E/R bilge well suction piping. The mud box is a coarse strainer with a straight tailpipe down into the well. T he strainer plate can be cleaned when necessary without disconnecting any pipe work. From Bilge Well To Bilge Pp

18. E mergency Bilge Suction Vv : U sed to prevent flooding of the ship. Has direct suction from the tank top & connected to largest capacity pump. (High Capacity}

19. A rrangement of Bilge & Ballast shall - Prevent - Water passing from ballast spaces to mach spaces or cargo spaces . Prevent - Water passing from one compartment to another. Various regulations for bilge and ballast systems are governed by SOLAS.

20. SW that is intentionally carried by the ship is known as Ballast W ater . Ballasting or de-ballasting is a process by which SW is taken in or out of the ship as needed. Ballast tanks are constructed in ships having suitable capacity ballast pumps and piping.

21. Ships when not carrying cargo or are lightly loaded, ballast water is carried for safe handling of ship.

22. A ship’s ability to take in or out ballast water is crucial for safe operation . Changes in trim/displacement must be adjusted by ballast water. This will be due to - Loading/Unloading cargo R eceiving/consuming fuel

23. Ballast Water must be able to be transferred between tanks for operational reasons. There may be combined or separate lines for suction & discharge. When cargo space is used for ballast or dry cargo suitable ballast or bilge connection will be provided.

24. On occasions when the sea is very rough and the ship’s stern comes out of water and racing of the propeller occurs. In such cases, emergency heavy weather ballast water is added to a designated cargo hold. The added ballast water improves the ship’s stability and safety, giving more immersion to the propeller.

25. Emergency Heavy Weather Ballast

26. Ballast Hold No.4 Ballast Hold No.3