The main difference between the elbow and carbon steel elbow is the material; the chemical composition it contains will keep the surface of the elbow from rusting and corroding for a long time.

In piping systems, elbows are pipe fittings used to change the direction of the pipeline. Commonly, there are three types by angle: 45°, 90°, and 180°. Additionally, other non-standard angle elbows, such as 60°, are included according to engineering requirements.