FLUID PIPE AND PRESERVING METHOD FOR PIPE CONNECTING PART

PROBLEM TO BE SOLVED: To provide a technique for environmentally cutting off a 600 alloy without developing a welding crack in a 690 alloy.

SOLUTION: This fluid pipe 1 connects an upstream side pipe 10 and a downstream side pipe 20 by a connecting part 30 including a welding part 32 composed of the 600 alloy, and is provided with a first tubular body 41 composed of the 600 alloy and arranged in the fluid pipe 1 so as to cover the connecting part 30 and a second tubular body 43 composed of the 690 alloy and arranged in the fluid pipe 1 so as to cover the first tubular body 41. A build-up welding part 42 is arranged in a shaft directional end part of the first tubular body 41.

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