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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 ...
The Code also covers technical subjects such as cargo tanks and cargo containment, ship arrangements, pressure vessels, vapour and pressure piping systems, materials, controls and instrumentation, venting, fire protection, filling limits and other special requirements. [3]
LNG for use as a fuel, as seen on this LNG bunkering vessel is regulated by the Code. The IGF Code provides industry standards for ships that use fuels with a flashpoint of less than 60°C. The IGF Code seeks to regulate the safety changes from the carriage and use of gas fuel, in particular liquefied natural gas and other low-flashpoint fuels.
LNG storage tank at EG LNG. Modern LNG storage tanks are typically of the full containment type, which has a prestressed concrete outer wall and a high-nickel steel inner tank, with extremely efficient insulation between the walls. Large tanks are low aspect ratio (height to width) and cylindrical in design with a domed steel or concrete roof.
A typical cargo cycle starts with the tanks in a "gas free" condition, meaning the tanks are full of air, which allows maintenance on the tank and pumps. Cargo cannot be loaded directly into the tank, as the presence of oxygen would create an explosive atmospheric condition within the tank, and the rapid temperature change caused by loading LNG ...
LNG storage tanks possess a number of advantages over underground storage. As a liquid at approximately −163 °C (−260 °F), it occupies about 600 times less space than gas stored underground, and it provides high deliverability at very short notice because LNG storage facilities are generally located close to market and can be trucked to ...
In the U.S., storage tanks operate under no (or very little) pressure, distinguishing them from pressure vessels. Tanks can be used to hold materials as diverse as milk , water , waste , petroleum , chemicals , and other hazardous materials , all while meeting industry standards and regulations. [ 1 ]
The tanks may be fitted on, below or partly below deck and be both longitudinally and transversely located. Lobe-type tanks are commonly used at the forward end of the ship, to improve the poor utilization of the hull volume. This containment system is used for LPG, Ethylene and small scale LNG carriers.