| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a determination method of the lining in a pipe capable of more simply and certainly determining whether a lining layer formed of a resin is executed on the inner surface of the pipe formed of a metal in a non-destructive manner. Ž<P>SOLUTION: In the determination method of the lining in the pipe for determining whether the lining layer L formed of the resin is executed on the inner surface of the pipe P formed of the metal, an ultrasonic wave S is applied to the inside of the pipe P formed of the metal from the surface of the pipe P formed of the metal and the presence of the lining layer L is determined on the basis of the ratio of the intensity of the first reflected wave S1 reflected first from the inner surface Pa of the pipe P and the intensity of the second reflected wave S2 reflected next from the inner surface Pa of the pipe P. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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