In piping systems, elbows are pipe fittings used to change the direction of the pipeline. By angle, there are three commonly used types: 45°, 90°, and 180° elbows. Additionally, other non-standard angle elbows, such as 60°, are included based on engineering requirements. Materials for elbows include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals, and plastics.
Connection methods to pipes include: direct welding (common method), flange connection, hot melt connection, electric melt connection, threaded connection, and sleeve connection, etc. They can be classified according to production process into: welded elbow, pressed elbow, expanded elbow, cast elbow, and butt-welded elbow, etc. Other names: 90-degree elbow, right-angle bend, etc.
