| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sampling method for collecting a connection part without affecting physicality of the connection part between a pipe and a tube plate. <P>SOLUTION: A sampling method for collecting a connection part 4 between a pipe 2 and a tube plate 3 includes: a preparation step for marking the pipe 2 to be sampled as a target pipe 2a, marking multiple pipes 2 located on the outer peripheral side of the target pipe 2a as quasi-target pipes 2b and marking multiple pipes 2 located on the outer peripheral side of the quasi-target pipes 2b as cutout pipes 2c; and a step for cutting the target pipe 2a, the quasi-target pipes 2b, the cutout pipes 2c and the tube plate 3 after the preparation step. The step for cutting the cutout pipes 2c and the tube plate 3 at each cutout pipe part includes: a step for using a drill 7 to trim the cutout pipes 2c and the tube plate 3 so as to expand each inner hole of the cutout pipes 2c; a step for cutting the cutout pipes 2c by shaving off wall thickness of the cutout pipes 2c; and a step for cutting the tube plate 3 so that adjacent holes h formed by trimming are connected with each other. <P>COPYRIGHT: (C)2012,JPO&INPIT |
