MARINE PUMPING SYSTEM. SPECIFIC LEARNING OBJECTIVES:. At the end of this topic you are expected to learn: Principles of Marine Pumping Systems State the function of a pump Describe the three requirements for a pump to transfer fluids List the losses of head in a pumping system
At the end of this topic you are expected to learn:
Explain the requirement for permission before any fluid is transferred onboard
Engine – a device for converting thermal energy of working substance into useful mechanical work
Pumps can also be found coupled with engine it supports. Motive power is selected for reasons of safety, economics or convenience.
- Atmospheric pressure: usually refers to the pressure in the local environment of the pump. Atmospheric pressure varies with elevation, it is 14.7 psi at sea level and decreases with rising elevation.
If our filter runs at 10 PSI, that would add 23.1 feet of head to the 17.9 feet required to overcome the friction loss of our pipe and fittings. So now the total pump head is 41 feet without considering the static head. (Notice that the pump head will increase as the filter gets dirty and increases the back pressure.)
1. State of adjacent waters noticed
2. Vessel properly secured to dock
3. Check suppliers product corresponds to ordered product
4. Agree quantity to be supplied
5. Check valves open
6. Day tanks full and supply valves closed
7. Warning signs in position e.g. No Smoking
8. SOPEP plan available
10. Oil Boom in place
11. Foam fire extinguisher placed at bunker station
12. Alfa Laval and transfer pumps off
13. Fuel tank supply valves open
14. Agree stop/start signals between vessel and barge/truck
15. Bravo flag flying/red light showing
16. Agree pumping/transfer rate
17. Agree emergency shut down procedure
18. Specification sheet received
20. Fuel nozzle and hose secured to vessel
21. Check barge/truck meters Reading:
22. Check on board meters Reading:
23. Bunker Valve open
24. Unused manifold connections blanked off
25. Master informed
26. Signal pumping to commence
The above checklist has to be completely filled legibly by both the ship & barge personnels.
SOPEP- Shipboard Oil Pollution Emergency Plan.
The SOPEP Locker must have minimum of the below specified items:
1. absorbent roll
2. absorbent pads
3. absorbent granules
4. absorbent materials
9. empty receptacles (200 ltrs capacity)
10. portable air driven pumps
11. oil boom
12. oil spill dispersants.
During Bunkering checklist:
1. Witness taking and sealing of 2 representative product samples
2. Monitor fuel connections for leaks fuel flow and control tank levels
3. Change over of tanks whenever necessary.
4. Checking the rate at which bunkers are received.
5. Checking the tightness/slackness of mooring ropes.
6. Checking trim/list of the bunker barge & the ship.
7. Continuous monitoring/look outs for the vessel's position(when at anchor).
During bunkering, the above checklist must be filled up and continuous monitoring of the above specified items are required till the bunkering operation is complete.
On completion of the bunkering operations, with the ship-barge co-ordination, the line should be blown with air to make sure the line is not filled with oil. The after-bunker checklist is followed.
After Bunker Checklist:
1. Bunker Valve closed
2. Disconnect hose (drain before disconnecting)
3. Check barge/truck meter Reading:
4. Check ships meter Reading:
5. Sign Bunker Delivery Receipt BDR No.:(Bunker Delivery Report/Note).
6. Retain BDR with product sample
7. SOPEP plan returned to bridge
8. Clean up gear stowed / Oil boom returned
9. Bravo Flag/Red light stowed/switched off
10. Remove and pack away warning/safety signs
11. Foam fire extinguisher placed back in correct location
12. Complete Oil Record Book
13. Master informed of completion
14. Confirm in Oil Record Book Bunkering checklist completed
pa(psia) = pr(psig) + patm(psia), patm = 14.7 psia at sea level.
where pa is the absolute pressure, pr the relative pressure and patm the absolute pressure value of the local atmospheric pressure.