Heat exchanger tube

摘要

The present invention provides a heat exchanger tube having a high pressure resistance. A heat exchanger tube A having a tube body whose interior is defined as a passage of a fluid and whose inner and outer surfaces are defined as heat entrance and exit surfaces of the fluid, is characterized in that a bowl-shaped bulging wall portion bulging toward the direction of the opposite wall portions is formed on one or both of the opposite wall portions of said tube body, the bulging leading ends of said bowl-shaped bulging wall portions are defined as connecting portions linearly protruding, and said connecting portions are linearly brought into contact with the opposite wall portions and are fixed thereto.