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Top 5 Global Supplier of LNG by 2020

Sabine Pass Terminal Corpus Christi Project


What is LNG?
LNG is liquefied natural gas (methane) that has been cooled to an extremely cold temperature (-260° F/ -162.2° C). At standard atmospheric conditions, methane is a vapor, not to be confused with gasoline, which is a liquid.


How is LNG shipped?
Specially designed ships are used to transport LNG to U.S. terminals. They have double hulls and are constructed of specialized materials that are capable of safely storing LNG at temperatures of -260° F/ -162.2° C.


Where do ships unload LNG?
Ships unload LNG at specially designed terminals where the LNG is pumped from the ship to insulated storage tanks at the terminal. LNG is also converted back to gas at the terminal, which is connected to natural gas pipelines that transport the gas to where it is needed. Specially designed trucks may also be used to deliver LNG to other storage facilities in different locations. 


How is LNG stored?
LNG is stored in double-walled, insulated tanks that are designed to prevent any gas from escaping. There is also a dike or impounding wall around the tank that is capable of containing the entire volume of the tank, in the unlikely event of a spill. This would prevent any LNG from flowing off the site.


Is LNG explosive?
In its liquid state, LNG is not explosive. When LNG is heated and becomes a gas, the gas is not explosive if it is unconfined. Natural gas is only flammable within a narrow range of concentrations in the air (5% to 15%). Less air does not contain enough oxygen to sustain a flame, while more air dilutes the gas too much for it to ignite. 


How is public safety addressed?
In the event of a spill, LNG vapors will disperse with the prevailing wind. Cold LNG vapor will appear as a white cloud. To keep the public safe, flammable vapor (gas) dispersion exclusion zones are established for LNG facilities. 

If LNG is spilled in the presence of a flame, a very localized fire will result. Since this fire would burn with intense heat, thermal exclusion zones are also established.  Flammable vapor and thermal exclusion zones are determined to keep the public at a safe distance from LNG facilities.


How are LNG tankers and facilities being kept secure? 
Security measures for land-based LNG facilities and onshore portions of marine terminals, are required by U.S. Department of Transportation regulations. Examples of these requirements include security patrols, protective enclosures, lighting, monitoring equipment, and alternative power sources. 

Interstate natural gas companies receive security updates and alerts on a regular basis from federal agencies, including the FBI. A Security Task Force has also been formed. FERC has also removed Critical Energy Infrastructure Information pertaining to LNG storage facilities from its website.

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