How to distinguish between 45 degree elbow and 135 degree elbow?

How to distinguish between 45 degree elbow and 135 degree elbow?

The 45-degree elbow and the 135-degree elbow are respectively connected on both sides. It can be seen that the 90-degree elbow forms a right angle, while the 135-degree elbow forms an obtuse angle.

introduce:
In the pipeline system, elbow is a pipe fitting that changes the direction of the pipeline. According to the angle, there are three most commonly used elbows: 45°, 90° and 180°. In addition, according to project needs, other abnormal angle elbows such as 60° are also included. Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics, etc. The methods of connecting to pipes include: direct welding flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection, etc.

use:
German standard elbow is a commonly used connecting pipe fitting in pipeline installation. It connects two pipes with the same or different nominal diameters to make the pipeline turn at a certain angle. The nominal pressure is 1-1.6Mpa.

Process flow:
Elbow is a pipe fitting used for pipe turns. Among all the pipe fittings used in the pipeline system, they account for the largest proportion, about 80%. Usually, different forming processes are selected for elbows with different materials or wall thicknesses. Commonly used seamless elbow forming processes in manufacturing plants include hot pushing, stamping, extrusion, etc.