Method for producing flat tube

A method of manufacturing a flat tube. The flat tube is provided with a first wall, a second wall opposite to the first wall, a third wall connecting the first wall and the second wall, a fourth wall connecting the second wall and the first wall and an inner cavity allowing a medium to flow through, and the first wall and the second wall are longer than the third wall and the fourth wall. Wherein a turbulence insert is arranged in the interior cavity, and wherein the method comprises at least the following process steps:-providing a sheet material-shaping the sheet material into an intermediate tube, the sheet is raised in at least two sections and the sections at least partially form the first wall and the second wall of the flat tube and the intermediate tube forms an opening in the region of one of the third wall or the fourth wall-providing a turbulent insert and inserting it into the interior by welding and closing the opening. 一种制造扁平管的方法。所述扁平管具有第一壁、与所述第一壁相对的第二壁、连接所述第一壁和所述第二壁的第三壁、连接所述第二壁和所述第一壁的第四壁以及供介质流过