The tube plate welding of the high-temperature gas heat exchanger produced and manufactured by the company for Xi'an Shaangu Power Co., Ltd. is inner hole welding. Its structural characteristics are: the weld seam is a fully welded structure (the weld seam that is not inner hole welding is a corner joint structure). The advantages are: enhanced pull-out force between the tube plate and the heat exchange tube, resistance to medium erosion, wear and corrosion, and better vibration resistance than corner welds. The service life of the equipment is increased and costs are saved. The production difficulty is high, the requirements are high, and the technical content is high. After the user used it without any leakage, 2 sets were immediately produced.
