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Mainly used on the water wall of large-capacity power station boilers. Compared with commonly used light tubes,3003 inner grooved aluminium tube is a seamless tube whose inner wall is processed into a spiral. It can maintain the nucleate boiling state under high heat load operation conditions, so as to avoid film boiling and prevent the tube from burning out. At present, the internal thread alloy aluminum tube can be roughly divided into two types: small diameter single-head internal thread alloy aluminum tube and medium diameter multi-head internal thread alloy aluminum tube. The former is made by cutting the inner surface of the tube with a super-hard turning tool, and the latter is made by cold-drawing with special-shaped tools.



The 3003 inner grooved aluminium tube is a patent of the U.S. Patbork Company. The geometry of the thread is to prevent the tube from overheating under high thermal load, and considering the frictional resistance of the fluid and the influence on the strength of the tube, it is determined by many years of experimental research. It is a cross-sectional view of single-threaded and two-threaded pipes. The 3003 inner grooved aluminium tube is mainly used for the heat exchange of air conditioners. Compared with the light pipe, it has a larger inner surface area. When the coolant flows in the tube, it is beneficial to heat exchange. Therefore, in view of the excellent heat exchange performance of internally threaded alloy aluminum tubes, they will become more and more popular. The basic method of internal thread forming of production technology is to increase the wall thickness by lightening, and at the same time, in the process, the internal thread is generated along the thread direction placed on the mandrel in the tube. Moreover, the pipe diameter reduction has been greatly improved.