| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube for heat exchanger capable of preventing joined parts from peeling off without needing the labor and time for formation. SOLUTION: This tube 14 is formed so that both edge parts 17 in the bending direction of a metal plate 16 bent to tubular shape are brazed each other and are brazed to the inner face of the metal plate 16. First joining parts 18 bent about 90 deg. toward the inner face side of the metal plate 16 are respectively formed to both edge parts 17. Second joining parts 19 bent about 90 deg. for the first joining parts and parallel to the inner face the metal plate 16 are respectively formed to these first joining parts 18. Further, at both edge parts 17, the first joining parts 18 are brazed in the thickness direction each other, the thickness direction side face at the second joining parts 19 are brazed to the inner face of the metal plate 16.
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