CA2246075A1 - Method and apparatus for measuring the thickness of a coated material - Google Patents

Method and apparatus for measuring the thickness of a coated material Download PDF

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Publication number
CA2246075A1
CA2246075A1 CA002246075A CA2246075A CA2246075A1 CA 2246075 A1 CA2246075 A1 CA 2246075A1 CA 002246075 A CA002246075 A CA 002246075A CA 2246075 A CA2246075 A CA 2246075A CA 2246075 A1 CA2246075 A1 CA 2246075A1
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CA
Canada
Prior art keywords
pipe
thickness
velocity
coated
measurement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002246075A
Other languages
French (fr)
Other versions
CA2246075C (en
Inventor
Thomas J. Carodiskey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Waygate Technologies USA LP
Original Assignee
Emerson Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emerson Electric Co filed Critical Emerson Electric Co
Publication of CA2246075A1 publication Critical patent/CA2246075A1/en
Application granted granted Critical
Publication of CA2246075C publication Critical patent/CA2246075C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
    • G01B17/025—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness for measuring thickness of coating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness

Abstract

A pipe (P) carries corrosive fluids (F). Ultrasonic measurements of the pipe's thickness are made with an instrument (10) to determine if it needs to be replaced. If the pipe is coated with a layer (L) of protective material (C), a time of flight (TOF) measurement is made to determine the velocity of ultrasonic pulses transmitted through the material from which the pipe is manufactured. A second measurement is made to determine the velocity of pulses through the coated pipe material. The pulse velocity is now a function of the coating thickness by knowing the two velocity values, the coating thickness is determined. An ultrasonic pulse measurement of the thickness of the coated pipe is then made. The coating thickness is then calculated by a processor (12) of the instrument. If the thickness value is less than a minimum thickness value (M), an indication is given that the pipe needs to be replaced.
CA002246075A 1998-05-12 1998-10-02 Method and apparatus for measuring the thickness of a coated material Expired - Lifetime CA2246075C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/076,612 1998-05-12
US09/076,612 US6035717A (en) 1998-05-12 1998-05-12 Method and apparatus for measuring the thickness of a coated material

Publications (2)

Publication Number Publication Date
CA2246075A1 true CA2246075A1 (en) 1999-11-12
CA2246075C CA2246075C (en) 2004-08-17

Family

ID=22133136

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002246075A Expired - Lifetime CA2246075C (en) 1998-05-12 1998-10-02 Method and apparatus for measuring the thickness of a coated material

Country Status (8)

Country Link
US (1) US6035717A (en)
EP (1) EP0957337B1 (en)
JP (1) JP3638812B2 (en)
CN (1) CN1167938C (en)
CA (1) CA2246075C (en)
DE (1) DE69939633D1 (en)
HK (1) HK1023398A1 (en)
TW (1) TW412631B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006042446A1 (en) * 2006-09-09 2008-03-27 Bayerische Motoren Werke Ag Ultrasonic measuring device calibrating method for determining thickness of individual layers of multi-layered lacquer structure in automobile lacquer, involves covering one of layers of steel plate with coverings at different sections

Also Published As

Publication number Publication date
CN1235270A (en) 1999-11-17
CN1167938C (en) 2004-09-22
EP0957337A2 (en) 1999-11-17
TW412631B (en) 2000-11-21
US6035717A (en) 2000-03-14
EP0957337A3 (en) 2001-04-25
HK1023398A1 (en) 2000-09-08
DE69939633D1 (en) 2008-11-13
JPH11325868A (en) 1999-11-26
CA2246075C (en) 2004-08-17
JP3638812B2 (en) 2005-04-13
EP0957337B1 (en) 2008-10-01

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