LNG Storage Tanks

Question 1

What is the working capacity of the two (2) double-wall/full containment LNG Storage Tanks (T-10001/2)?

Answer 1

200,000 M3

Question 2

What is the designed normal operating pressure of the LNG tanks?

Answer 2

0.7 PSIG

Question 3

What is the design temperature of the LNG tanks?

Answer 3

-150/-274 degrees fahrenheit

Question 4

Explain LNG rollover.

Answer 4

The rapid release of vapors causes stratifications

Question 5

What is the set relief point on PSV’s-100001A/B/C/D?

Answer 5

4 PSIG

Question 6

PC-100245A/B controls pressure of LNG tanks, and is set to open and close at what pressures?

Answer 6

open 0.15 close 0.25

Question 7

During holding mode, LNG rundown from LTS to both tanks for peak LNG case are?

Answer 7

80 % to one tank 20% to the other

Question 8

What is the design pressure of the LNG Storage Tanks?

Answer 8

4 psig internal

Question 9

The LNG Storage Tanks store LNG from what sources?

Answer 9

bog, pumps, psv’s from jetties, circulations line

Question 10

Five LNG pumps are used during loading operations to achieve a loading rate of?

Answer 10

12,000 M3/Hr

Question 11

LALL-100009, low-low level alarm on Tank 1 and 2 is set at?

Answer 11

4.5 %

Question 12

LAHH-100009, high-high level on Tank 1 and 2 shutdown is set at? And closes what valves?

Answer 12

98.5 closes sdv-100028 sdv-100032

Question 13

ESD

Answer 13

ESD 0 - PLANT SHUT DOWN
ESD 1- LNG TANK ISOLATION
ESD 2- TANK PSI HH,LL - PZT-100014 A/B/C
TANK LEVEL HH, LL - LT-100009 A/B/C

Question 14

SIS-1012-1016
TRIPS PUMPS

Answer 14

ESD-0
ESD-1
LL TANK PSI
LL TANK LEVEL
ESD FROM JETTYS 1,2,3
GAS DETECTED
HIGH VIBRATION
LNG LOADING HDR 1 & 2
FLOWRATE LIMIT INTERLOCK

Question 15

SIS-100010-100032
CLOSES ON:

Answer 15

ESD-0
ESD-1
HH- TANK PSI
HH- TANK LEVEL

Question 16

T-10001

Answer 16

200,000 M^3
DESIGN PSI 0.145 - 4
DESIGN TEMP- 150 F - -274 F
.7 NOP