General, Physical And Functional Description Of General Liquid Oxygen/Nitrogen Storage Tanks Flashcards
Storage Capacity
1500 gallons of cryogenic liquid with an additional 10% vapor space (ullage) area above the cryogenic liquid tank
(150 more space)
Operational Pressure 0 PSIG
On a tank being filled
Operational Pressure 8 PSIG
On an idle tank
Operational Pressure 10-50 PSIG
Tank in operation
Operational Pressure 50 PSIG
Max
Vacuum Integrity
Cold Tank
100 microns or less
Vacuum Integrity
Warm Tank
200 microns or less
Components
- Inner Shell
- Outer Shell
- Annulus (Vacuum Space)
- Pressure Buildup Coil
- Protective Devices
Inner Shell
Stainless steel Internal baffles to prevent sloshing. Supported by heat conducting materials
Outer Shell
Carbon steel material Welded in place in a frame supported by two stiffener rings
Annulus
Filled with Perlite insulation 6” thickness
RV-1 Storage Tank Relief Valve
- brass or stainless steel relief valve
- spring loaded seat
- lifts at 55 PSIG
BD-1 Storage Tank Burst Disk
- circular, thin metal disc
- thin aluminum disc
- diaphragm ruptures @70 PSIG
BD-3 Annular Space Burst Disk
- cylindrical
- spring and plate type relief valve
- burst @3 PSIG
V-14 Tank Vacuum Valve
Isolate the vacuum pump from annulus
CV-2 Pressure Buildup Coil Check Valve
Prevents back-flow of vapor from vapor space to the P.B.C.
V-12 Rapid Pressurization
Admits 50 PSIG of O2 or N2 gas from storage flask via pressure regulator, to the inner tank vapor space
V-9 Tank Drain Line Valve
Controls the flow of cryogenic liquid overboard for emergency dump only (Only with CO’s permission)
V-10 Liquid Sample Valve
Fitted with hose connection for drawing a liquid sample
V-23 Tank Fill Valve
Isolate tank from producer
V-7 Full Trycock Valve
Provides indication that tank is full
V-20 Liquid Transfer Valve
Controls the flow of cryogenic fluids from the storage tank to the transfer line