Laser welding
Due to the existence of the above two defects in traditional finned tubes, designers have to consider the consequences of these two defects when designing, so they will consider a large heat exchange margin, even 20% to 30%, resulting in a huge heat exchanger volume. It is unknown whether the design requirements have been met during the manufacturing process, During the operation, it is unknown when the defects of the above two points will cause the failure of the heat exchanger. Moreover, due to the huge volume and the use of many materials, a lot of resources are wasted, such as the waste of site, the increase of transportation costs, the increase of labor during production, the increase of electric energy consumption during the operation due to the large equipment, and the increase of maintenance and other costs. Due to the improvement of manufacturing process, the integral rolled finned tube has overcome the above defects, thus greatly saving raw materials and operation. The production costs are obvious.
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