Welding process for stainless steel pipelines

Abstract

The invention discloses a welding process for stainless steel pipelines. The welding process for the stainless steel pipelines is characterized by comprising the following steps that 1, materials are prepared, and specifically, SUS304 is selected as the material of the pipelines; A132 is selected as the material of a welding rod, the diameter of the welding rod is phi 2.0 mm, and the length of the welding rod is 300 mm; H0Cr21Ni10 is selected as the material of a welding wire; 2, the drying temperature of the welding rod is 250 DEG C-300 DEG C, and the drying time is 2-3 h; 3, beveled edges are cleaned; 3, the beveled edge end surfaces of pipe openings need to be perpendicular to the center line, and the aligned clearance of the two pipe openings needs to be uniform; 4, the beveled edges are machined; 5, the pipelines are welded; 6, welding treatment is conducted; 7, argon filling is treated; and 8, metal welding spatter, molten slag, an oxide skin, burrs, weld beading, concave pits and greasy dirt on the inner and outer surfaces of the pipes are cleaned up. According to the welding process for the stainless steel pipelines, all the phase parameters of the process are controlled strictly and reasonably, the procedures are standard, the welding stress and deformation are reduced, and accordingly the mechanical properties of the welded pipelines are improved.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a stainless steel pipeline welding technology. Background technique [0002] H2O2 is a strengthening agent and highly corrosive. In the presence of alkali, iron, heavy metals and other impurities, it will be violently decomposed and explosive. The H2 and aromatic hydrocarbon working fluids used in production are also flammable and explosive dangerous chemicals. The production process is a system Pressurized continuous cycle chemical production process. Therefore, in the process of pipeline installation, the quality of welding directly affects the reliability of the product. Once the operation is violated, the light ones will not be able to operate normally, and the serious ones will cause catastrophic accidents. Therefore, hydrogen peroxide stainless steel pipeline welding is a very critical process. The quality of welding will directly affect the quality of H2O2. When traditi...

AI Technical Summary

Problems solved by technology

When traditional welding methods are used to weld stainless steel pipes into one body, the heat input is not easy to control, which will easily lead to poor welding quality and poor mechanical properties of the product