Framo pump working system on the ship.

Summary

This video outlines the correct operation of cargo pumping systems for tankers during loading, unloading, stripping, and tank cleaning. It emphasizes the importance of safely operating cargo pumps, heating systems, and ballast pumps, as well as following specific procedures for each stage of cargo handling. Key points include checking pump conditions, controlling hydraulic pressure, ensuring proper stripping procedures, and maintaining equipment to prevent issues like dry running and corrosion. The video also highlights how to manage energy consumption, reduce wear and tear, and enhance safety and efficiency during cargo operations.

Takeaways

• 😀 Start cargo loading slowly with the cargo valve partly open until the pipeline is filled. Then open the valve fully.
• 😀 Always monitor ballast pump cofferdam condition by checking the level in the header tank during operation.
• 😀 Ensure correct heating procedures when required, including purging the cofferdam and adjusting steam heating medium until the desired temperature is achieved.
• 😀 When pumping cargo, increase hydraulic system pressure to 130 bar and maintain pump speeds for maximum discharge rate.
• 😀 Use the correct procedure for parallel pumping, ensuring the hydraulic system pressure is 20 bar higher than the highest consumer pressure.
• 😀 During stripping, run the cargo pump at reduced speed until the tank is empty, then follow local stripping procedures to fully empty the tank.
• 😀 Always purge the cofferdam after stripping to prevent clogging, especially with high-viscosity cargo.
• 😀 When using hydraulic system pressure, ensure it does not exceed the allowed limits, with the max pressure being 130 bar for standard operation.
• 😀 During tank cleaning, balance the capacity of the tank cleaning machine and the pump speed to avoid excessive pump wear.
• 😀 Use local control valves to strip pumps effectively and maintain safe operational speeds throughout the cargo operation process.

Q & A

What is the primary purpose of the video?

The video provides guidance on the correct operation of cargo pumping systems during various stages such as loading, heating, unloading, stripping, and tank cleaning in tanker vessels.

What should be done shortly before loading cargo?

Before loading, it is important to purge the cofferdams of all cargo pumps and record the results.

What is the recommended procedure when starting the cargo loading?

Start the loading slowly through the drop line with the cargo valve partly open. Once the pipeline is filled, open the valve fully for proper loading.

How should ballast pumps be operated during unloading?

Start the ballast pumps when emptying the ballast tanks is no longer possible through gravitation. Monitor the header tank's level during operation to check the ballast pump's cofferdam condition.

What is the procedure for heating the cargo?

To heat the cargo, purge the cofferdam and record the result. Then, open the valves and spectacle flanges in the cargo circulation line, start the required number of power packs, and adjust the system pressure to approximately 70 bar. Continue until the desired temperature is achieved.

How can the cargo pump's operation be adjusted for stripping?

During stripping, run the cargo pump at reduced speed until the cargo tank is empty and the pump loses suction. If necessary, use local control for stripping from the deck side.

What should be done if a defective switch causes a shutdown of the entire system?

If a problem occurs with a defective switch, use mode one on the emergency panel located inside the main control room (CCR) to avoid delays in cargo operations. This should only be done after verifying that the problem is caused by the defective switch.

How should cargo pumps be operated when multiple pumps are being used in parallel?

When operating multiple pumps in parallel, calculate the required number of power packs using the instruction manual. Then, increase the hydraulic system pressure to approximately 130 bar and start each pump, one by one, maintaining the discharge pressure and ensuring the manifold pressure is managed carefully.

What steps should be taken at the end of the discharging process?

At the end of the discharging process, reduce the capacity of the cargo pumps and stop some of the power packs when hydraulic oil consumption decreases.

Why is it important to flush the stripping line during tank cleaning?

Flushing the stripping line during tank cleaning ensures that any residue is cleared and prevents clogging. It is especially important to use fresh water if seawater was used during cleaning to avoid corrosion from chlorides.