A liquefied natural gas storage tank or LNG storage tank is a specialized type of storage tank used for the storage of Liquefied Natural Gas. LNG storage tanks can be found in ground, above ground or in LNG carriers. The common characteristic of LNG Storage tanks is the ability to store LNG at the very low temperature of -162 °C (-260 °F). LNG storage tanks have double containers, where the inner contains LNG and the outer container contains insulation materials. The most common tank type is the full containment tank.[1] Tanks vary greatly in size, depending on usage.

If you are looking for more details, kindly visit CIMC ENRIC.

In-ground LNG tanks are also used; these are lined or unlined tanks beneath ground level.[2] The low temperature of the LNG freezes the soil and provides effective containment. The tank is sealed with an aluminium alloy roof at ground level. Historically there have been problems with some unlined tanks with the escape of LNG into fissures, the gradual expansion of extent of the frozen ground, and ice heave which have limited the operational capability of in-ground tanks. All piping connected to the LNG tanks, whether above ground or in-ground, are routed through the top of the vessel.[2] This mitigates against loss of containment in the event off a piping breach.

In LNG storage the pressure and temperature within the tank will continue to rise. LNG is a cryogen, and is kept in its liquid state at very low temperatures. The temperature within the tank will remain constant if the pressure is kept constant by allowing the boil off gas to escape from the tank. This is known as auto-refrigeration.[3]

The world's largest above-ground tank (delivered in ) is the 180 million liters full containment type for Osaka Gas Co., Ltd. The world's largest tank (delivered in ) is the 200 million liters Membrane type for Toho Gas Co., Ltd.[4]

See also

• Liquefied natural gas terminal

An Introduction to LNG Storage Systems

Natural gas provides clean, reliable, and affordable energy around the world. Natural gas is a cryogen, meaning it is a liquid at very low temperatures. Natural gas can be efficiently and safely transported from areas with abundant resources to areas of high demand as a liquid. 

LNG storage tank systems keep the gas in its liquid state for storage or transportation. These tank systems are complex and highly engineered. LNG storage systems use auto-refrigeration to keep the pressure and the temperature in the tank constant. This technology is actually quite old. The first natural gas liquefaction plant was built in West Virginia in . Since then, many advances have been made to improve natural gas storage, but the systems function the same way.

API Codes and Standards

For more LNG Tank Containerinformation, please contact us. We will provide professional answers.

In the s, the American Petroleum Institute (API) created standards for the design, construction, and material choices in storage tank systems.  These standards help maintain safety and quality across the industry. API codes are also continually evolving to reflect new advances and best practices in the field.  

LNG Containment Types

There are three main storage containment types for LNG storage systems: single, double, or full containment.

A single containment system consists of an inner and outer container. The inner container is designed to hold liquid and is liquid-tight. The outer container is designed for product vapor pressure. It retains and protects the insulation, but does not contain liquid if the inner container leaks.

A double containment system has a liquid and vapor-tight primary tank system. This system is built inside a secondary container that is liquid-tight. This secondary liquid container is liquid-tight but not vapor-tight.

Finally, a full containment system consists of a liquid-tight primary container and a liquid and vapor-tight secondary container. Both can independently contain the product. The secondary container controls vapor release in the event of a primary product leak. Another design feature of this containment system is thermal corner protection (TCP).  TCP protects the base-to-wall joint on the outer tank. In the event of a primary container leak, TCP provides liquid tightness and thermally isolates the joint from the cold liquid. 

Choosing a tank and containment configuration for an LNG  facility is one of the first steps in the design and engineering process. Once an owner/ operator determines which system best suits the application, performance requirements can be established. 

If you want to learn more, please visit our website lng transport trucks.