| 摘要 |
PROBLEM TO BE SOLVED: To inspect a piping to be inspected even if a rib or a sheath pipe is present in a piping becoming a direct inspection object in a multiple piping mutually supported in a fixed or movable state by a rib. SOLUTION: In inspecting the corrosion or the like of a multiple piping 1 mutually supported in a fixed or movable state by ribs 2a, 2b, a piping to be inspected and the piping reaching the piping to be inspected from the innermost piping are filled with a liquid 12 to be set to such a state that no air is present in the space up to the wall of the piping to be inspected and the innermost piping 1C wherein no ribs 2a, 2b are present and the outer piping 1B are inspected in a non-destructive manner. |
