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How Do LNG Ship Tanks Work?
LNG (liquified natural gas) shipments are allowing us to use a cleaner burning fuel for our energy needs. But how do LNG ship tanks work?
In this article, we'll dive into the details, providing a simple explanation of how these tanks function.
What is an LNG Ship Tank?
An LNG ship tank is a large container that is used to hold liquified natural gas for transport across the sea. After gas is extracted from the earth, it is processed and cooled to -162 degrees Celsius, which is the temperature at which it turns to a liquid state.
These tanks must be designed to keep the gas in a liquid state, even in the face of rough and uneven ocean waves. Additionally, these tanks must be able to withstand harsh weather conditions and keep the crew and passengers on board safe.
Construction of LNG Ship Tanks.
LNG ship tanks are constructed using specialized materials that can withstand extremely low temperatures. The typical materials used for construction are nickel steel and aluminum alloy.
The tanks' design takes into account the natural tendency of the liquid to expand when heated. Through a process called thermal insulation, these tanks are designed to keep the liquid gas cool and prevent an explosion.
Inside the Tank.
When looking at an LNG tank, it's essential to understand that there are two levels in the tank - the liquid level and the vapor level. The pressure inside the tank keeps the liquid in a liquid form while the heat from the body's outer shell is insulated, making sure the liquid stays cool.
As the ship moves and its waves impact the tank, the LNG sloshes around inside the tank. To ensure the liquid stays in its liquid form, the tanks have unique insulation systems. Typically, the insulation systems use advanced technology, including a vacuum space between the innermost layer and the outermost layer of the tank structure.
How is LNG Pumped?
Once an LNG ship has reached its destination, the liquified gas must be transported from the ship's tank into the receiving unit. The process involves moving the liquid from the ship's tank to a transport pipeline. .
The method used to pump the LNG is called a spray system. The spray system essentially sprays the liquid gas, slowly but surely, into the pipeline. The transportation pipeline carries the liquid gas to the receiving unit, where it is discharged and processed.
Safety Measures in Place.
Safety measures are a critical consideration in LNG ship tank design. As well as being able to withstand harsh weather conditions, these tanks are engineered to ensure that both the crew and passengers on board are safe.
One of the safety measures in place to prevent accidents is the use of double-walled tanks that separate the liquid gas from the outer wall. If any leaks occur, the liquid won't spill into the sea. Instead, it will remain inside the ship's hull, providing additional protection.
Wrap Up.
In conclusion, LNG ship tanks play a critical role in transporting liquified natural gas, and they are a crucial part of our energy transport infrastructure.
If you'd like to learn more about the role of LNG ships and the companies supplying them, be sure to contact us. You can also get in touch with a supplier who can help you learn more about this type of transport system.