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How to conduct a ‘Cargo Environmental Control Examination’

Inert gas systems are installed on liquefied gas carriers to meet operational demands like gas freeing, before gassing up, and in some cases, between the switch of cargoes. When performing the examination of the IGS, examiners need to verify the following three items: operational O2 content meter; operational alarm for when oxygen levels exceed 5%; means to prevent backflow of gas.

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ClassNK releases guidelines for liquefied gas carrier structures

ClassNK issued its Guidelines for Liquefied Gas Carrier Structures – Independent Prismatic Tanks. The Guidelines include technical requirements regarding the structural strength assessments of liquefied gas carriers by using direct calculation. The Guidelines are consisted by the Guidelines for Direct Strength Analysis, and the Guidelines for Fatigue Strength Assessment .

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