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Non-destructive measurement of pipe wall thickness

  • US 6,561,032 B1
  • Filed: 05/15/2000
  • Issued: 05/13/2003
  • Est. Priority Date: 05/15/2000
  • Status: Expired due to Term
First Claim
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1. A method of measuring the wall thickness of a pipe carrying a fluid medium, comprising sensing disturbances in the pipe at two spaced locations, determining the propagation velocity of coupled propagation mode signals at low frequencies resulting from said disturbances, and calculating the average pipe wall thickness between said two locations from said propagation velocity and known constants for said pipe and fluid medium.

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