| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heat transfer tube for heat exchange, whose metallic surface will not be corroded even when the tube is exposed to high-temperature corrosive environment for a long period of time and which is capable of recovering more high-temperature heat compared with a conventional heat transfer tube. SOLUTION: A tube 1, through which fluid to be heated flows, is constituted of a heat resistant alloy and the outside of the heat resistant alloy tube 1 is coated with a cover material 3, consisting of a ceramics alloy composite material, through a thermal expansion cushioning material 2 while the thermal expansion cushioning material 2 is provided with a non-adhesive structure with respect to the heat resistant alloy tube 1 or the cover material 3 made of the ceramics alloy composite material. Further, the heat transfer tube for heat exchange is provided with a three-layered structure, in which at least a part of the thermal expansion cushioning material 2 is contacted with the heat resistant alloy tube 1 and at least a part of the cover material 3, made of the ceramics alloy composite material, is contacted with the thermal expansion cushioning material 2.
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