Shipping and Transportation

The current global fleet of LNG carriers is more than 500, with another 50 vessels or more in order, mainly in the shipyards of Japan and South Korea. LNG tankers are double-hulled ships specially designed and insulated to prevent leakage or rupture in an accident. The LNG is stored in a special containment system within the inner hull where it is kept at atmospheric pressure and -161°C.

Three types of cargo containment systems have evolved as modern standards. These are the: 

    - spherical (Moss) design 
    - membrane design
    - structural prismatic design.

Most of the current LNG ships use spherical (Moss) tanks, and they are easily identifiable as LNG ships because the top halves of the spherical tanks are visible above the deck. The typical LNG carrier can transport about 90,000–160,000 cubic metres of LNG, which will provide about 54–96 million cubic metres of natural gas. The typical carrier measures some 275 metres in length, about 43 metres in width and 11 metres in water draft.
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