Method of manufacturing a heat transfer tube

Heat exchange pipe inner surface formed by multiple bulges (2) is distributed on the heat transfer, a projection (2) is the liquid flow pipe is provided with a manner of connection, therefore distributed on the tube flow heat transfer medium turbulence non-uniformity. The arranged on the liquid mixing reducing close to the inner surface of the outer layer is of fluid medium, comprising a body of a thermal resistance, therefore force heat exchange. The bump (2) is further provided the extra surface area of the additional heat exchange. Method of the invention is comprising a cylinder; and assembling of the tool for convenient on the existing manufacturing device, comprising a keel of the inner surface of the cutting pipe in turn to produce the keel layer cutting edge, and improving the keel layer is formed with a bulge (2) lifting frame. With a aid of the method, do not need to remove the metal pipe from inner surface to form a projection (2), therefore eliminated the outside; the outside of the damage of said cylinder device.