Welding method for large-scale stainless-steel tank wallboards under high temperature environments

Abstract

The invention discloses a welding method for large-scale stainless-steel tank wallboards under high temperature environments. The welding method is characterized in that the method includes the following steps arranged according to welding orders: a, a step of the welding of vertical weld seams of tank wallboards; b, a step of the welding of transverse weld seams of the tank wallboards; and c, a step of the welding of at the T-shaped ports of the tank wallboards. The characteristics of the method are that the wallboard welding under high temperature, high humidity and blown sand environments has longer stress release time than usual welding. The advantages of the method are that welding technologies are rigorous in measure design and operationality is strong; welding stress release modes can be successfully buffered after tank wallboard welding construction is finished; welding deformation caused by releasing can be avoided; welding quality of the tank wallboards is good, which passesthe inspection standards of an American ASME standard and a Saudi Arabia SABIC standard which are in mutual combination and supplement and wins praises of owners; and relevant manufacturing experienceof petrochemical tanks can be accumulated.

Description

technical field [0001] The invention relates to a welding method for a steel tank wall plate, in particular to a welding method for a large stainless steel tank wall plate under a high-temperature environment. Background technique [0002] Chinese patent CN104002079A disclosed a method for assembling the spherical shell parts of a stainless steel spherical tank on August 27, 2014, which includes the following steps: [0003] In the first step, place the press-down template on the tire frame; [0004] In the second step, the stainless steel spherical tank shell plate to be assembled is placed on the lower pressure template; [0005] The third step is to place the upper pressure plate on the stainless steel spherical tank shell; [0006] The fourth step is to clamp and fix the upper pressure formwork, the stainless steel spherical tank shell plate and the lower pressure formwork by using the clamp; [0007] The fifth step is to weld the stainless steel spherical tank shell ...

AI Technical Summary

Problems solved by technology

However, this method of relying on pressing plate forming will cause difficulty in the assembly of tank panels in high temperature environments, especially in the assembly of large stainless steel tank panels, because it does not control the dimensional accuracy of each tank panel, and does not set Allowable deviation range, in severe cases, there will be a dilemma that the stainless steel tank wall panels cannot be assembled

[0008] Therefore there is above-mentioned inconvenience and problem in the making of known large-scale stainless steel tank wall plate

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