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Pipe line tracing
E/R bilge system which usually refer to E/R bilge well to Bilge pump (the small pump) to Bilge Primary Tank to Bilge Holding Tank.
The other Bilge system serves the deck side, taking suction from Cargo Hold bilge wells etc and discharge direct overboard. For the deck side, we can use pumps such as “Bilge G.S pump”.
Bilge well suction strainer and suction valve
Bilge pumpQ: Bilge Pump is running, but Bilge Well water level is not reducing. Why?
E/R Bilge System pipe line:
Bilge Well -> Strainer -> Valve -> Bilge Pump suction valve -> Bilge Pump suction strainer -> Bilge Pump -> Bilge Pump discharge valve -> Bilge Primary Tank.Fluid (air/liquid) generally flow from higher pressure zone to lower pressure zone. Since Bilge Wells are exposed to the atmosphere (meaning Bilge water is unlike Seawater with positive pressure) and usually about 1.5~2 metres lower in height below the Bilge Pump, the Bilge Pump have to create lower pressure zone on the suction side, like a vacuum cleaner in order to suck the Bilge water towards the Bilge Pump.
Always start troubleshooting from the easiest/most common possibility, and work towards the most uncommon possibility. Please refer to the flow chart I made:
Q: At port, how to handle bilge water if bilge tanks/Wells are all full?
As a junior engineer,
1. Immediately inform Second Engineer and Chief Engineer.
A) Chief Engineer and Captain will inform the ship managers, and liaise with the port and agent for shore disposal of the bilge water.2. Check engine room for source of water contributing to the bilge tanks/wells.
A) If there are jobs that are contributing to the bilge water (such as cooler cleaning), inform Second Engineer to decide regarding these jobs.
B) If water leakages are found, inform Second Engineer and carry out repairs to reduce further increase of bilge water.
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