A pipe with elbow refers to a piping setup where an elbow fitting is used to change the direction of flow, typically at 45° or 90° angles. Elbows are essential components in piping systems, allowing for directional changes while maintaining smooth fluid or gas flow. These fittings can be welded, threaded, or flanged to the pipe, and are commonly made from materials like carbon steel, stainless steel, PVC, or copper, depending on the application's pressure, temperature, and corrosion requirements. Such configurations are widely used in plumbing, HVAC, oil and gas, and industrial process systems.