Aluminum pipe is a kind of non-ferrous metal pipe, which is made of pure aluminum or aluminum alloy and hollow along its longitudinal length. Aluminum tubes are widely used in automobile, ship, aerospace, aviation, electrical appliances, agriculture, electromechanical, home and other industries. The machinability of aluminum tube after quenching and cold working hardening is still good, but it is not good in annealed state. Corrosion resistance is not high. Anodizing and painting methods or aluminum plating on the surface are often used to improve corrosion resistance. It can also be used as a mold material. Aluminum tubes are generally divided into square tubes, round tubes, patterned tubes, special-shaped tubes and spherical aluminum tubes. The advantages of aluminum pipe are suitable for welding process, long service life, energy saving, light weight, corrosion resistance and excellent bending performance.