Heat exchange pipe and pipe plate welding method and application thereof

The invention relates to the technical field of heat exchanger preparation, in particular to a heat exchange pipe and pipe plate welding method and application thereof. The method comprises the following steps of (1) chamfering at the edge of a pipe hole, and then inserting a heat exchange pipe into the pipe hole so as to be paired with a pipe plate, wherein the end port of the end to be welded ofthe heat exchange pipe is lower than the end surface of the pipe plate, but the pipe wall of the heat exchange pipe can always contact the wall surface of the pipe hole, and a 'U'-shaped groove is formed; and (2) welding the heat exchange pipe and the pipe plate which are assembled in the step (1), connecting the end surface of the pipe plate and the end port of the end to be welded of the heat exchange pipe through a welding seam, then processing the welding seam to form an arc shape, and enabling the form of the welding seam to be in a streamline shape. According to the heat exchange pipe and pipe plate welding met