LNG storage tank

LNG storage tank

A 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. 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. [ [http://www.mhi.co.jp/ydmw/e/tank/lng/ag/index.htm Diagram of a full containment tank] ] Tanks are roughly 180 feet high and 250 feet in diameter. [ [https://www.piersystem.com/external/index.cfm?cid=569&fuseaction=EXTERNAL.docview&documentID=48088 A Typical LNG Import Terminal] bp ]

In LNG storage tanks if LNG vapours are not released, 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. [ [http://www.energy.ca.gov/lng/faq.html#600 LNG FAQ] ]

The world largest Above-ground tanks (Delivered:2000) 180,000KL Full containment type for Osaka Gas Co., Ltd.(2) The world largest tank (Delivered:2001) 200,000KL Membrane type for Toho Gas Co., Ltd. [http://www.mhi.co.jp/tekken/e/lng_tank/index.htm]

References


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