Containment system for type B independent liquid cargo tank

Abstract

The invention provides a containment system for type B independent liquid cargo tank. The liquid cargo tank comprises a top surface, a bottom surface and a side wall, wherein the top surface, the bottom surface and the side wall are formed by welding a plurality of outer plates; the containment system comprises leakage slots and liquid collecting wells; the leakage slots respectively cover all the weld seams among the outer plates on the top surface and the side wall; the liquid leaking from the weld seams can flow down along the leakage slots to an inner bottom plate of a hull; one or more liquid collecting wells are respectively arranged at both ends of the inner bottom plate in the length direction of the hull; insulating layers are laid on the top surface, the bottom surface and the side wall; the containment system also comprises a baffle plate; the baffle plate is arranged around the liquid cargo tank; and the upper end of the baffle plate is connected with the wall plate of the hull, and the lower end of the baffle plate is connected with the inner bottom plate. According to the containment system disclosed by the invention, the cost is reduced in the aspect of materials by reasonable design of the containment system, and the containment system can guarantee the safety of the hull structure in the case of liquid cargo leakage in the liquid cargo tank.

Description

technical field [0001] The invention relates to a B-type independent liquid cargo tank containment system. Background technique [0002] The liquefied gas carrier is a special ship used to transport low-temperature liquid cargo such as liquefied petroleum gas and liquefied natural gas. The liquid cargo is loaded in the liquid cargo tank of the liquefied gas carrier. According to the requirements of the IGC Code, there are five types of cargo containment systems for liquefied gas carriers: independent liquid cargo tank containment systems, membrane liquid cargo tank containment systems, semi-membrane liquid cargo tank containment systems, integral liquid cargo tank containment systems and internal insulation type cargo tank containment system. The liquid cargo tank in the independent type liquid cargo tank containment system is completely supported by itself, does not constitute a part of the hull, and does not share the strength of the hull. The liquid cargo tank is divided...

AI Technical Summary

Problems solved by technology

However, at present, special steels such as low-temperature carbon-manganese steel can only be purchased from large-scale steel plants in Japan and South Korea. In China, no suitable steel plants have been found to produce them.

According to the current market price of steel, the price of low-temperature carbon-manganese steel is basically 1.5 to 2 times the price of ordinary steel plates, which greatly increases the cost of ship construction

At the same time, low-temperature carbon-manganese steel requires high welding technology, which also virtually increases the cost of shipbuilding. Therefore, how to reduce the cost of shipbuilding with B-type independent liquid cargo tanks has become a technical problem to be solved by those skilled in the art

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