SH波斜角探傷法を用いた小口径配管の外面腐食検出に関する研究

• 菊池 務

  出光興産(株)

• 横野 泰和

  ポニー工業(株)

• 新田 薫

  非破壊検査(株)

• 四辻 美年

  出光エンジニアリング(株)

書誌事項

タイトル別名

• Study on a Detection Method of Corrosions on External Surface of Small Nominal Diameter Pipes by Angle Beam Technique using Horizontally Polarized Shear Wave
• SHハ シャカク タンショウホウ オ モチイタ ショウコウケイ ハイカン ノ ガイメン フショク ケンシュツ ニ カンスル ケンキュウ

抄録

The objective of the present paper is to propose a method for detecting corrosions on the external surfaces of actual small-diameter pipes by applying angle beam technique using Horizontally Polarized Shear Wave (SH-wave) . The accuracy for measuring the corrosions in the pipes with the nominal diameter of 1∼3 inches, in which artificial flaws have been fabricated is investigated. Furthermore, the measurements in site are carried out and comparisons are made between the measurement results and the actual conditions. <br>The following results were obtained through these experimental investigations. <br> (1) The angle beam technique using SH-wave can detect local thickness reduction in the circumferential direction of small-diameter pipes. <br> (2) The present angle beam technique using SH-wave is not affected by the fluid existed inside the pipes, and the corrosion detection is possible under actual operating conditions. <br> (3) Although there is no correlation between the depth of the artificial flaw and the signal amplitude, it is shown that the artificial flaws can be detected with high accuracy. <br> (4) The results of corrosion measurements on the external surface of the actual small-diameter pipes show that corroded parts which are located far from the variable angle probe can be detected and that the reduction rate of the cross-sectional area is greater. <br> (5) The location of the flaw can be estimated by the angle beam technique using SH-wave even in the case where the corrosion grows. <br> (6) The present method shown here is an outstanding inspection method for detecting external surface corrosions.

収録刊行物

• 圧力技術

  圧力技術 48 (6), 326-333, 2010

  一般社団法人 日本高圧力技術協会

キーワード

• SH wave
• Small-diameter pipes
• Corrosion
• Circumferential direction
• Variable angle probe

詳細情報

• CRID: 1390001204615768192
• NII論文ID: 130004446872
• NII論文ID: 10027474901
• NII書誌ID: AN00011762
• DOI: 10.11181/hpi.48.326
• ISSN: 13479598
• ISSN: 03870154
• NDL書誌ID: 10932772
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10932772
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可