What is the material division and industry standard of butt welding elbow

Welded elbow (Welded elbow) is a steel elbow formed by hot pressing or forging. Its connection method is to directly butt weld the elbow and the steel pipe. The editor below shares the material division and industry standard of butt welding elbow

Butt welding elbows are divided according to its radius of curvature, which can be divided into long radius butt welding elbows and short radius butt welding elbows; according to the pressure level, there are about 17 kinds, which are the same as the American pipe specifications. Among the two most commonly used are STD and XS; according to the point of view of the elbow, there are 45-degree butt-welded elbows, 90-degree butt-welded elbows and 180-degree butt-welded elbows, and other elbows with different viewpoints.

　　 According to the data, there are carbon steel, alloy steel and stainless steel. Butt welding elbow is a kind of elbow that is formed by steel hot pressing or casting technology. The connection method is through butt welding of the elbow and steel pipe, and the two workpieces are welded together along the entire end surface using resistance heat. Generally, there is resistance. Two methods of butt welding and bright butt welding have high productivity and simple automation, so they have been widely used.

　　 Butt welding elbow generally has 45 degree elbow, 90 degree elbow, 180 degree elbow, and other materials include carbon steel, alloy steel and stainless steel. Generally, welding elbows are welded at the pipeline construction site. This is because the welding specifications and requirements of different types of pipelines are based on the pipeline weld level. In the butt weld elbow weld. The welding operation of the elbow is completed according to the external environment or the actual situation of the pipeline rust or corrosion treatment. In order to avoid corrosion or corrosion in the weld, the elbow life is short.

　　Before welding the elbow, in order to avoid welding deformation, the entire elbow group on both sides is reinforced with the stainless steel arc plate and keel after the tile is completed. According to the traditional welding method, argon arc welding is required. Considering the welding cost, the diameter of the waist shrimp is large, and argon is difficult. The above-mentioned elements are welded by two welders symmetrically, which solves the problem of argon. Also very good. Use argon arc welding technology.