Jetty 1/2/3 Flashcards
What is the LNG loading facility comprised of?
3 stand alone LNG berthing docks
What is the designed LNG loading ship rate?
12,000 M3/Hr 52,835 GPM
Explain the jetty arms configuration at each dock.
2 LNG loading arms
1 vapor
1 Hybird
What can the Hybrid arm function as?
Loadding or Vapor Arm
What is the primary function of the LNG berth?
Export LNG to tanker
Each berth includes:
Loading Platform, 6 mooring dolphins, 4 breasting dolphins and walkways
As the LNG Tanker continues to cool, and nitrogen continues to be displaced, once the displaced vapor nitrogen/inert gas content is less than 20% where is the vapor routed?
Bog Compressors
How are the arm operation controlled?
Radioremote controller or local control panel
During ship loading mode, what is the LNG ship pressure?
36 PSIG (Design PSI)
Before LNG can be loaded at the design flow rate, a small stream of LNG flows through the bypass of the HIC valves, located near the loading arm, to?
Cool down the loading arms & Ships piping
What is the purpose of having a small stream of LNG always circulating through loading lines?
To keep cold conditions in the piping
What is the minimum required LNG circulation rate through the ship loading lines?
holding 900 GPM
Loading 660 GPM
LNG is loaded through two loading headers full of liquid and at the same temperature as the tank liquid, what size piping are the loading headers?
36”
LNG from the LNG Tanks will be used to gas-up (and then cool down) the warm ship. Where will the provision for gas pressure isolation be located?
Jetty 2 only
When the displaced vapors from the LNG Carrier exceed 20% nitrogen/inert gases, the system is lined up such that the displaced ship vapors are sent to?
Marine Flare
As the LNG Carrier continues to cool and nitrogen continues to be displaced, once the displaced vapor nitrogen/inert gas content is less than 20%, the system is lined up such that the displaced ship vapors are sent to?
Bog Compressors
ESD 1
jetties isolation
ESD 2
Jetties Isolation and perk release
Perk Release
seperation of arms from the ship caused by arms moving outside of designed spec
SIS-1040:
ESD Level 0
Local or Control Room ESD
Activation of ESD-1 from Jetty 1 or 2
LO-LO LNG Tank Level
LO-LO LNG Tank Pressure
Alarms
Pressure and Temp Indicators detect pipe leakage on outter pipe.
Fiberoptic leak detection system (DTS) is installed on the PIP system:
Alarms when:
Outer pipe drops below ambient temp by 30F.
Outer pipe temp decreases by 2F/min over a period of 5 min.
Note:
PIP runs to loading arms. Inner pipe 36” outer pipe 42”
Maintained under a vacuum @ 6 to 12 inH2O.
