1. The extension lines of the two nozzles of the 90-degree elbow are vertical, while the extension lines of the two nozzles of the 45-degree elbow intersect at an acute angle.
2. The two sides of the 90-degree elbow form a right angle after the pipe is taken over, and the two sides of the 45-degree elbow form an obtuse angle after the pipe is taken over.
Classification of elbows:
According to the angle, there are three most commonly used ones: 45° and 90°180°. In addition, according to engineering needs, it also includes other abnormal angle elbows such as 60°.
According to materials, there are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.
According to the connection mode, direct welding flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection, etc.
According to the production process, there are welding elbows, stamping elbows, push elbows, casting elbows, etc.