Carbon steel elbows are metal fittings that change the direction of pipelines on carbon steel pipes. The connection method includes screw and welding. According to the angle, there are three most commonly used 45° and 90°180°. In addition, according to engineering needs, it also includes other abnormal angles such as 60°. The materials of the elbows are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.
The basic process of the carbon steel elbow is: first, weld a polygonal ring shell with a polygonal cross-section or a polygonal fan-shaped shell with two ends closed. After the interior is filled with pressure medium, internal pressure is applied, and the cross-section under the effect of internal pressure The polygon gradually turns into a circle, and eventually becomes a circular ring shell. According to need, a circular ring shell can be cut into 4 90° elbows or 6 60° elbows or other specifications.
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