Milestones:
- Assessment Phase – Operational flow and Assessment:
- All Tank Levels Achieved
- 1.A Tank 1 required level achieved.
- 1.B Tank 2 required level achieved.
- 1.C Tank 3 required level achieved.
- 1.D Tank 4 required level achieved.
- Loading Completed
- Double Shut Valves on Liquid Lines Closed
- ESD Set to Blocking Mode
- Line Draining Completed
- Closing Custody Transfer Print-Out for Official Tank Gauging
Required Valves and Criteria:
- No Need to Open Any Valves during this exercise.
Actions During Exercise:
Deviation from Exercise:
After starting or resuming the loading, the user should not open any non-required valves or close any required valves. If this happens, a caution message will appear, instructing the user to undo the previous action. If the user fails to correct the action, the exercise will be terminated.
High Crossover Pressure:
- If the crossover pressure reaches 4.5 bar, the user will be warned to increase the filling valve openings.
- If the pressure reaches 5 bar, the exercise will be terminated.
High Pressure in Manifolds:
- If the instantaneous rate of a tank reaches 4000 m³/h, the user will be warned to increase the filling valve openings.
- If the instantaneous rate reaches 5000 m³/h, the exercise will be terminated.
Alarms & Remarks
| Alarm Condition |
Alarm Time |
Alarm Level |
Alarm Title |
Alarm Description |
| max volume 99.2% – 5500 |
|
remark |
Ramp Down Commenced |
Total Tank’s volume reached required level for rampdown, rampdown commenced. |
| Tank volume reaches 99.2% – 500 |
|
high |
Start Adjusting Filling Valve CL100/CL200/CL300/CL400. |
Reaching very high liquid level,
start adjusting filling
valve CL100/CL200/CL300/CL400. |
| Any Tank Reaches Volume 95%,98%,99.2%,99.4% |
|
low/high |
Volume High Level/High High Level/Very High Level/Extreme High Level – CT1/CT2/CT3/CT4. |
CT1/CT2/CT3/CT4 volume reached High/High High/Very High/Extreme High. |
| When Instaneous rate reaches >= 4000 |
|
caution |
High Pressure In Manifolds Lines |
High pressure in liquid manifold line, open or increase the filling valve percentage. |
| When an unnecessary valve is opened or required valve closed. |
|
caution |
Deviation Detected |
Deviation from the exercise is detected, undo your last action. |
| Cross Over Pressure >= 4 bar |
|
low |
High Cross Over Pressure |
High cross over pressure in the liquid line, increase tank filling valve opening. |
| After Loading Completed. |
|
remark |
Keep CL300 Open For Line Draining. |
Close filling CL100, CL200, CL400 and keep CL300 open for line draining. |
| Double shut valves closed and CL300 fully Opened. |
|
remark |
Started Line Draining |
Line draining has started, liquid filling into CT3. |
| CT3 Volume Reached above 99.2% during line draining. |
|
high |
Volume Level Reached Very High In CT3 |
Override very high-level alarm in CTS Main Page and continue line draining. |
Step By Step Procedure
- Assessment Phase – Operational flow and Assessment:
Starting Ramp Down:
-
- The exercise starts with a ship rate of 10,000 m³/h and a total tank volume of 168,447.2 m³. When the total volume reaches 173,347 m³, ramp-down will commence, and different loading rates will become available to the user.
Tank Levels (CT1 – CT4)
CT1 Tank Levels:
-
- 95% of Max Volume (25,543.8 m³): Low-priority alarm indicating the tank is nearing high volume.
- 98% of Max Volume (26,350.5 m³): Low-priority alarm indicating the tank is nearing high-high volume.
- 99.2% – 500 m³ (26,673.2 m³): High-priority alarm prompting the user to adjust the filling valve.
- 99.2% – 50 m³ (26623.2m³) or higher: Required level achieved.
CT2 Tank Levels:
-
- 95% of Max Volume (48,574.9 m³): Low-priority alarm indicating the tank is nearing high volume.
- 98% of Max Volume (50,108.8 m³): Low-priority alarm indicating the tank is nearing high-high volume.
- 99.2% – 500 m³ (50,222.4 m³): High-priority alarm prompting the user to adjust the filling valve.
- 99.2% – 50 m³ (50672.4 m³) or higher: Required level achieved.
CT3 Tank Levels:
-
- 95% of Max Volume (48,580.2 m³): Low-priority alarm indicating the tank is nearing high volume.
- 98% of Max Volume (50,114.3 m³): Low-priority alarm indicating the tank is nearing high-high volume.
- 99.2% – 500 m³ (50,227.9 m³): High-priority alarm prompting the user to adjust the filling valve.
- 99.2% – 110 m³ (50617.9 m³) or higher: Required level achieved.
CT4 Tank Levels:
-
- 95% of Max Volume (48,576.3 m³): Low-priority alarm indicating the tank is nearing high volume.
- 98% of Max Volume (50,110.3 m³): Low-priority alarm indicating the tank is nearing high-high volume.
- 99.2% – 500 m³ (50,223.9 m³): High-priority alarm prompting the user to adjust the filling valve.
- 99.2% – 50 m³ (50673.9m³) or higher: Required level achieved.
Stop Loading Process:
-
- When the current ship rate is 1000 m³/h, the “Stop Loading” button will become available. The user can stop the loading process by clicking this button once the required tank levels are achieved.
Closing Double Shut Valves:
-
- After stopping the loading, the user must close the double shut valves.
ESD Set to Blocking Mode:
-
- After closing the double shut valves, the user must set the ESD system to blocking mode. Navigate to the ESD Systems page under the ESD tab to do this.
Line Draining:
-
- After setting the ESD to blocking mode, the user will be prompted to open the return valve of Cargo Tank 3. Once opened, 60 m³ of cargo will drain into Cargo Tank 3.
Closing Custody Transfer Print-Out:
-
- After line draining is complete, the user can close the CTS Report and Setup by navigating to the CTS Main page. This will complete the exercise.
