Welding method of large-scale stainless steel tank under high-temperature, high-humidity and blown sand environment

Abstract

The invention provides a welding method of a large-scale stainless steel tank under a high-temperature, high-humidity and blown sand environment. The welding method is characteristics by comprising the following steps that a, preparatory work before welding construction is carried out; b, welding measure regulations are carried out; and c, welding environment regulations are carried out. Comparedwith usual welding, the welding method of the large-scale stainless steel tank under the high-temperature, high-humidity and blown sand environment has the characteristics of longer welding stress relief time under the high-temperature, high-humidity and blown sand environment, the welding method of the large-scale stainless steel tank under the high-temperature, high-humidity and blown sand environment has the advantages that welding technical measures are designed closely, the operability is high, a welding stress relief method after the tank welding construction completed is buffered successfully, and welding deformation caused after release is avoided, and the welding quality of a tank meets standards of Saudi SABIC and America ASME.

Description

technical field [0001] The invention relates to tank welding in the field of petrochemical industry, in particular to a welding method for large stainless steel tanks under high temperature, high humidity and windy sand environment. Background technique [0002] The large-scale stainless steel tank project in Saudi Arabia with 20,000 cubic meters, tank diameter of 38m, tank height of 24.55m, and tank wall height of 19.1m is located on the sandy soil of the Persian Gulf seaside. High difficulty. During the welding construction process of the tank, the American ASME standard and the Saudi SABIC standard are combined and mutually complementary for inspection and acceptance. [0003] Usually, the welding stress of the tank will be released after the welding construction is completed, but the welding stress release time of the large stainless steel tank under the environment of high temperature, high humidity and wind and sand is longer than that of the normal welding, and the w...

AI Technical Summary

Problems solved by technology

[0003] Usually, the welding stress of the tank will be released after the welding construction is completed, but the welding stress release time of the large stainless steel tank under the environment of high temperature, high humidity and wind and sand is longer than that of the normal welding, and the welding deformation will be caused after the release. The welding deformation of the tank has clear requirements in the specification API650, and the deformation must be within the range

However, in a high-humidity environment, the tank wall is deformed due to wet weld bead or rain during welding, so how to control the welding deformation in tank construction is a difficult problem

[0004] Therefore there is above-mentioned inconvenience and problem in the welding mode of known large-scale stainless steel tank