| 摘要 |
PURPOSE:To detect flaws by mounting a plurality of vertical probes and slant angle probes on an arc shaped side plates having a concentric circle with a pipe under test in an array pattern, and setting slant angle probe heads at specified positions regardless of the outer diameter and the thickness of the pipe under test. CONSTITUTION:A slant angle probe 12 comprises a vertical probe 14 having a rectangular contact surface and a sound wedge 15 having a radial angle width. The width of the probe 12 in the circumferential direction of the pipe is several mm or less. A plurality of the slant angle probes 12 are arranged in a pipe circumference shape in an array pattern. Therefore, the width of the wedge in the pipe circumference direction is machined in a radial angle shape. The probes are attached to side plates 16a and 16b in an arc shape that is concentric with a pipe under test 10. Abrasion resisting shoes 17a and 17b are attached before and after the probe group in order to hold the gap between the wedges 15 and the surface of the pipe 10 and to prevent the abrasion of the wedges 15. Therefore, flaw detection of pipe material can be performed readily, and the following to welded parts is not required, while the adjustment in changing the thickness of the pipes is not required, too. |
