Mounting method and mounting tool for pipe of gas collecting platform of chemical tanker

Abstract

The invention relates to a mounting method for a pipe of a gas collecting platform of a chemical tanker. The mounting method is used for centering adjustment and horizontal plane correction of the pipe of the gas collecting platform of the chemical tanker. According to the method, the adjustment of shore connections and welding of side flanges of a cargo tank are carried out by using a special tool, so that it is ensured that the side flanges of all the shore connections are located in the same plane, and the precision control requirement of + / -1 mm is met. The invention further relates to a special mounting tool. The special mounting tool structurally comprises a flange, a pipe and panels which are welded to form a set of tool. According to the method, the centering adjustment and the horizontal plane correction are conducted on a liquid cargo pipeline at the position of the gas collecting platform according to the ship design requirement, the liquid cargo pipeline meets the international standard, and the method is simple in structure, capable of being repeatedly used, high in assembling and disassembling performance and convenient to use and has a good promoting effect on improving the construction efficiency and enhancing the operation precision.

Description

technical field [0001] The invention relates to chemical tanker construction, in particular to a method for installing pipes on a gas gathering platform on a chemical tanker and a special installation tool. Background technique [0002] With the modernization of ships, the installation accuracy of ship pipes is getting higher and higher, especially for chemical tankers. There are as many as 33 cargo tanks in the whole ship, and the number of cargo tanks in different ship types may be more. Each hold has a separate shore connection extending to the gas gathering platform. According to the regulations of the classification society, the shore connection pipes of these gas gathering platforms have extremely high precision requirements. The outer flange surfaces of all the short pipes of the shore connection must be on the same horizontal plane, and the installation accuracy is within ±1mm to ensure that all cargo tank joints can be Connect with the shore arm pipeline. [0003]...

AI Technical Summary

Problems solved by technology

[0004] In the actual construction stage, due to welding deformation, errors in human eye observation, and interference of high wind factors on the horizontal cotton thread, the actual control effect on the horizontal plane of the pipe is extremely poor, and it is difficult to meet the design requirements. It is necessary to rework and correct the welds many times. It leads to poor welding quality of the final finished pipe and seriously prolongs the ship construction cycle

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