Tanker Pipeline SystemsDirect LineRing MainFree FlowCruciform

DIRECT LINE

Direct Line Advantages:- Relatively Fast Cheaper Good Segregation Line Wash fast Less Maintenance

•DISADVANTAGES:-

•NOT SO VERSATILE

•LINE WASHING INTO DESIGNATED TANKS

DIRECT LINE

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

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 receivingStart 2nd Pump at slow speed

RING MAIN SYSTEM

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

RING MAIN

RING MAIN

DIRECT LINE

RING MAIN

Free Flow

Advantages Fast load/discharge Simple Disadvantages: Poor segregation Vessel usually requires a pipeline

system as well

FREE FLOW SYSTEMOpen 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 up pumps

X

X

Crack Open Discharge valves& Start remaining

pumps

Direct Line (Loading)

FREE FLOW SYSTEM

Load and Discharge

# No3

Diesel Jet FuelPetrol

# No2# No1

Gate Valve:

Globe Valve

Butterfly Valve

Ball Valve

Safety Valves

The function of any safety valves is to prevent an undue rise in pressure in the vessel to which it is fitted