Insulated mounting method for segment jointing of an A-type independent liquid cargo tank

Abstract

The invention provides an insulated mounting method for segment jointing of an A-type independent liquid cargo tank. The method is applied after segments of the liquid cargo tank are welded and jointed. The method is mainly characterized by protecting each welding seams between the segments through over insulation, and preventing heat loss caused by positions of the welding seams. Main steps of the method comprise: surface cleaning for the welding seams between the segments, spraying of an anticorrosive coating, spraying of a foaming material, perfusion of a foaming material through die cavities, and spraying of a protective coating. Through the steps, the problem of inconvenience for insulated mounting during segment jointing of the liquid cargo tank can be effectively solved, and because the method is directed at a structure characteristic of the A-type independent liquid cargo tank and spraying of the foaming material and perfusion of the foaming material are adopted at the same time, the insulated effect can be effectively ensured, the tightness of insulated mounting can be guaranteed, and heat outside the liquid cargo tank is prevented from transferred into the liquid cargo tank.

Description

technical field [0001] The invention relates to an insulation installation method for segmental closure of an A-type independent liquid cargo tank. 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. These liquid cargoes are loaded in the liquid cargo tank of the liquefied gas carrier. insulation. The main purpose of the insulation of the cargo tank is to prevent the external heat from entering the interior of the cargo tank and reduce the evaporation of the cargo. [0003] According to the type of liquid cargo loaded, the workplace and other aspects, the liquid cargo tanks on the liquefied gas ship are divided into three types: type A, type B and type C, among which type A independent liquid cargo tank is mainly a flat plate structure with complete secondary shielding; B Type C independent liquid cargo tank is flat structure or spherical tank typ...

AI Technical Summary

Problems solved by technology

Among them, the type A independent liquid cargo tank is connected to the hull through the support system. The temperature of the liquid cargo in the liquid cargo tank is low, and the outside temperature is much higher than this temperature. Therefore, an effective insulation system must be used to achieve heat preservation and prevent external heat from entering. The purpose of the cargo tank is to reduce the evaporation of liquid in the cargo tank; however, the structure of the type A independent cargo tank is complex, not only the supporting structure connected to the cargo tank, but also functional structures such as domes and liquid accumulation tanks

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