POST DRY DOCK

Question 1

WHY DO WE USE DRY NITROGEN TO INERT THE I.B.S AND I.S

Question 2

HOW IS THE PRESSURE IN THE I.B.S AND I.S MAINTAINED?

Question 4

WHAT ARE THE 2 REASONS FOR DRYING HE CARGO TANK AFTER DRY DOCK

Question 5

HOW LONG DOES DRYING PROCESS TAKE AND WHAT IS THE PERFORAMNCE CRITERIA?

Question 6

WHAT DO YOU NEED TO CHECK WHEN DRYING?

Question 7

EXPLAIN THE PROCESS OF DRYING - WHERE IT COMES FROM, WHERE IT GOES AND HOW THE HUMID AIR IS DISPLACED.

Question 8

WHY IS IT NECESSARY TO LOWER THE DEW POINT BY DRY AIR TO AT LEAST -20 DEGREES CELSIUS?

Question 9

IS IT JUST THE CARGO TANKS THAT NEED TO BE DRIED/INERTED?

Question 10

WHAT IF YOU HAVENT DRIED AND INERTED A CERTAIN PART OF THE CARGO LINE AND NEED TO INTRODUCE LIQUID/VAPOUR AT A LATER DATE?

Question 11

WHAT IS THE ALTERNATIVE WAY TO DRY THE TANKS AND EXPLAIN THE PROCESS.

Question 12

WHERE CAN WET AIR BE CONTAINED IN DURING THE PROCESS AND WHICH MUST BE PURGED WITH DRY AIR?

Question 13

what content of O2 and dew point temp is produced by the IG plant?

Question 14

WHAT IS THE PERFORMANCE CRITERIA IN THE CARGO TANK TO CONSIDER IT INTERTED?

Question 15

WHAT DO YOU NEED TO DO WITH THE EMERGENCY PUMP COLUMNS PRIOR TO INTERTING THE CARGO TANKS?

Question 16

WHAT/WHERE ARE THE ‘CHECK POINTS’ DURING INERTING?

Question 17

WHAT PRESSURE IS THE TANK CONTROLLED ON BY THE REGULATING VALVE?

Question 18

WHEN YOU YOU OPEN THE DELIVERY VALVE WHEN INERTING?

Question 19

DURING INERTING, HOW LONG SHOULD YOU PURGE ALL THE CARGO LINES AND EQUIPMENTS WITH INERT GAS?

Question 20

HOW LONG CAN YOU WAIT TO LOAD THE TANKS WHILE THE TANK IS INERTED? WHAT CAN YOU DO IF REQUIRED TO REDUCE LEAKAGE?

Question 21

HOW WILL YOU INERT THE SPRAY LINES?

Question 22

EXPLAIN THE PROCESS FOR INERTING AND THE LINES/VALVES IN USE AND THE TIME IT TAKES TO COMPLETE THE PROCESS.

Question 23

WHAT HAPPENS IN THE TANK IF WE DO LOADING IN AN INERT TANK WITHOUT PURGING?

Question 24

WHAT IS THE PROCESS FOR GASSING UP - STAGE 1

Question 25

WHAT IS THE PROCESS FOR GASSING UP - STAGE 2

Question 26

WHY IS THE LNG VAPOUR INTRODUCED IN THE VAPOUR DOME?

Question 27

WHAT IS THE SET POINT TEMPERATURE OUT OF THE LNG VAPOURISER?

Question 28

WHEN IS STAGE 1 FINISHED?

Question 29

WHEN IS STAGE 2 FINISHED?

Question 30

WHAT ARE THE CHECK POINTS FOR GASSING UP?

Question 31

WHAT IS THE DURATION OF GASSING UP?

Question 32

WHY SHOULD WE AVOID USING HDs IF POSSIBLE?

Question 33

WHAT SHOULD WE DO WITH THE VENT MAST CONTROL PRIOR TO STARTING STAGE 2?

Question 34

WHAT CAN WE DO WHEN THE PRESSURE IN TANK INCREASES OR DECREASES?