| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and a method of inspecting the thickness of a boiler heat-transfer tube which can freely move in the tube axial and vertical directions of a heat-transfer tube group, even in narrow piping as in staggered piping and which can measure the piping thickness reduction amount with efficient and accuracy, even if the gap sizes of some heat-transfer tube groups are changed. SOLUTION: The thickness of a boiler heat-transfer wall is inspected: by pushing a top roller, a lower roller, and a driving roller, against a boiler heat-transfer tube to hold the apparatus itself, by operating individually or interlocking to operate an upper arm mechanism, a lower arm mechanism and a driving roller with telescopically moving mechanism; and pushing an ultrasonic probe head section against the boiler heat-transfer tube by moving the apparatus itself in the tubular axis direction and the vertical direction to operate the wall thickness test sensor with a telescopically moving mechanism. COPYRIGHT: (C)2007,JPO&INPIT
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