Tanker Pipeline Systems

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

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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

Open Drop Valves

Open Bulkhead Masters

Open Manifold Valves

Open Crossover Valves •When all valves confirmed open

Direct Line (Loading)

•Ship and shore checks Open complete Cargo Tank Valves •Request commence slow loading

Open Risers

Open Bulkhead Masters

Direct Line (Discharge) Start 2nd Pump at slow speed

Start 1st Pump at slow speed

Crack Open Pump Open Pump discharge Suction valves valves

•When all valves confirmed open •When Deck, Pumproom Open Cargo Open Open Manifld •Ship and and shore overside checks checks complete Tank Valves Crossover Valves completedValves •Request commence de-bottom •& Shore receiving

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 SYSTEM

•When deck and overside checks completed

Open Centre Open Manifold Open wing tank •Ship/Shore ready continue Cargo Tankrunni Valves cargo valves up pumps Valves

X X X

Crack Open Crack No.1 checks When Open Ship shore Discharge valves Pump Discharge completed & Start remaining Valve StartOpen No.1 Cargo Pump at slow Open Main Cargo Pump pumps RPM and De-bottom Tank Suction Suction Valves Valves

Direct Line (Loading)

FREE FLOW SYSTEM

Diesel

Petrol

Jet Fuel

# No1

Load and Discharge

# No2

# No3

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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