Membrane-type insulating system for cargo tank and liquefied gas fuel container of cryogenic liquefied gas carrier

Abstract

The present invention relates to a membrane-type insulating system for a cargo tank and a liquefied gas fuel container of a cryogenic liquefied gas carrier, the system having a corrugation-finishing membrane, which is made from an Invar material, welded to a secondary membrane connecting part or a primary membrane connecting part in order to seal corrugations at corner parts when a primary membrane and / or a secondary membrane is made from a SUS material having the corrugations, so that a separate angle piece for connecting the corrugations on the adjacent wall surfaces of the corner parts is unnecessary, and thus workability is improved and manufacturing costs can be reduced.

Description

technical field [0001] The present invention relates to a membrane-type heat insulation system for cargo tanks and liquefied gas fuel containers of extremely low-temperature liquefied gas carriers, more particularly in the case where the primary membrane and / or the secondary membrane has corrugations Next, membrane-type heat insulation system for the cargo hold and liquefied gas fuel tank of a cryogenic liquefied gas carrier that has a heat insulation structure that can realize a barrier even if no folds are connected at the corners of adjacent two sides of the cargo hold . Background technique [0002] Generally, liquefied natural gas (Liquefied Natural Gas, hereinafter referred to as "LNG") is a colorless and transparent ultra-low temperature that cools natural gas with methane as its main component at an ultra-low temperature of -162°C and reduces its volume to about 1 / 600 liquid, thereby facilitating the transportation and storage of natural gas. [0003] In order to u...

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Problems solved by technology

[0008] However, because the membrane-type heat insulation system of the cargo tank of the conventional liquefied gas carrier needs to provide angle pieces on the adjacent wall surface of the corner of the cargo tank to seal the membrane, there is not only a problem that not only causes the sealing work to be extremely Difficult and reduced workability, and the problem of increasing manufacturing costs

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