The document discusses different types of tanker pipeline systems used to load and discharge cargo tanks, including direct line, ring main, and free flow systems. A direct line system is relatively fast and cheaper but less versatile, while a ring main system is more versatile but more expensive and difficult to maintain. A free flow system provides the fastest loading and discharge but poorer segregation between cargo grades. Safety valves are used to prevent undue pressure rises in vessels.

1. Tanker Pipeline Systems
Direct Line
Ring Main
Free Flow
Cruciform

2. DIRECT LINE

3. Direct Line
 Advantages:-
 Relatively Fast
 Cheaper
 Good Segregation
 Line Wash fast
 Less Maintenance
•DISADVANTAGES:-
•NOT SO VERSATILE
•LINE WASHING INTO
DESIGNATED TANKS

4. DIRECT LINE

5. Direct Line (Loading)
Open Cargo
Tank Valves
Open
Crossover
Valves
Open Drop
Valves
Open Bulkhead Masters
Open
Manifold
Valves
•When all valves confirmed open
•Ship and shore checks complete
•Request commence slow loading

6. Direct Line (Discharge)
•When all valves confirmed open
•Ship and shore checks complete
•Request commence de-bottom
Open Cargo
Tank Valves
Open Crossover
Valves
Open
Risers
Open Pump
Suction
valves
Open
Bulkhead
Masters
Crack Open
Pump
discharge
valves
Open Manifld
Valves
Start 1st Pump at
slow speed
•When Deck, Pumproom
and overside checks
completed
•& Shore receiving
Start 2nd Pump at
slow speed

7. RING MAIN SYSTEM

8. RING MAIN
 Advantages
 Versatile
 Disadvantages:
 Erosion @ bends
 Expensive
 High maintenance
 Line washing difficult
 Relatively slow load/discharge

9. RING MAIN

10. RING MAIN

11. DIRECT LINE

12. RING MAIN

13. Free Flow
 Advantages
 Fast load/discharge
 Simple
 Disadvantages:
 Poor segregation
 Vessel usually requires a pipeline
system as well

14. FREE FLOW SYSTEM
Open Centre Cargo
Tank Valves
Open wing tank
cargo valves
Open Main Tank
Suction Valves
Open Cargo Pump
Suction Valves
Open Manifold
Valves
Crack Open No.1
Pump Discharge
Valve
X When Ship shore checks
completed
Start No.1 Cargo Pump at slow
RPM and De-bottom
•When deck and overside checks
completed
•Ship/Shore ready continue running u
pumps
X
X
Crack Open
Discharge valves
& Start remaining
pumps

15. Direct Line (Loading)

16. FREE FLOW SYSTEM

17. Load and Discharge
# No3
Diesel Jet Fuel
Petrol
# No2
# No1

18.  Gate Valve:

19. Globe Valve

20. Butterfly Valve

21. Ball Valve

22. Safety Valves
 The function of any
safety valves is to
prevent an undue
rise in pressure in
the vessel to which
it is fitted