The welding technology of thin-walled copper aluminum pipe, which is suitable for industrial production, is known as a world-class problem, and is the key technology of replacing copper with aluminum for connecting pipe of air conditioner.

Aluminum tube is a kind of nonferrous metal tube, which refers to the metal tubular material extruded from pure aluminum or aluminum alloy to be hollow along its longitudinal full length. There can be one or more closed through holes with uniform wall thickness and cross section, which are delivered in straight line or roll form. It is widely used in automobile, ship, aerospace, aviation, electrical appliances, agriculture, electromechanical, household and other industries.