Corrosion and insulation elbow pipes are bent using a complete set of bending molds, and are divided into cold bending and hot pushing processes. Regardless of the machinery and pipeline equipment, most applications require elbow pipes, primarily for oil, gas, and fluid transportation. The main production equipment for corrosion and insulation elbow pipes is the bending machine, which can be roughly categorized into CNC bending machines and hydraulic bending machines. The demand for corrosion and insulation elbow pipes is selected based on the functional requirements of the hot bending process, pipe diameter and wall thickness, hot bending equipment, and control techniques, and appropriate hot bending process parameters are established to ensure the production of qualified elbow pipes.