FLAW LOCATION ERRORS IN EXTRUDED STAINLESS STEEL PIPING

Refracted shear waves in extruded stainless steel pipes were found to change their velocity and direction (beam skewing) as they propagated through the pipe thickness. These variations in refracted angles and velocities result in flaw location errors during ultrasonic examination. Two techniques, one using refracted shear waves in pitch-catch mode and the other refracted longitudinal waves in pulse-echo mode, are discussed as to their feasibility in determining the flaw location accurately in these pipes. The result of the work was that a two-scan approach using refracted shear waves in pulse-echo for flaw detection and refracted longitudinal waves in pulse-echo for flaw location was recommended. (TRRL)

• Corporate Authors:

  Butterworth Scientific Limited

  Journals Division, P.O. Box 63, Westbury House, Bury
  Guildford, Surrey  England  GU2 5BH
• Authors:
  • Singh, A
• Publication Date: 1983-11

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 270-274
• Serial:
  • Ultrasonics
  • Volume: 21
  • Issue Number: 6
  • Publisher: Butterworth Scientific Limited

Subject/Index Terms

• TRT Terms: Corrosion resistance; Defects; Detection and identification; Detectors; Fault location; Faults; Location; Pipe; Stainless steel; Steel; Steel pipe; Test procedures; Ultrasonic tests; Ultrasonics
• ITRD Terms: 5238: Defect (tech); 9061: Location; 3361: Pipe; 4551: Stainless; 4542: Steel; 6288: Test method; 6739: Ultrasonic
• Subject Areas: Geotechnology; Highways; Materials; I26: Water Run-off - Freeze-thaw; I34: Steels and Metals;

Filing Info

• Accession Number: 00381140
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Apr 30 1984 12:00AM