| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiant tube which is used in an industrial heating furnace, has a welding structure, and achieves high strength and long life.SOLUTION: A radiant tube has a welding structure in which straight tubes and bent tubes, which are formed by welded tubes, are connected by welding. The straight tubes and the bent tubes have the same oval cross-sectional shape. The radiant tube has reinforcement materials for preventing bending of the straight tubes.SELECTED DRAWING: Figure 1 |
