Marine floating unit transportation was currently one of the main modes of LNG transportation,among which the C-type independent tank was an important LNG storage equipment on the floating unit.If the thickness of the liquid tank wall was too small,once strength failure occured and the storage liquid leaked,it would cause serious consequences.Independent LNG tanks usually used expensive 9%nickel steel materials,and excessive wall thickness would result in increased costs.Therefore,the accuracy of structural strength and wall thickness calculation for C-type independent LNG tanks had a crucial impact on practical engineering.Based on the research of the 7 500 m3 C-ype independent LNG tank,a brief introduction and analysis of the calculation method for the wall thickness of the cylinder and head were presented.
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