skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Method and apparatus for remote tube crevice detection by current and voltage probe resistance measurement

Abstract

A method and apparatus for determining the extent of contact between an electrically conducting tube and an electrically conductive tubesheet surrounding the tube, based upon the electrical resistance of the tube and tubesheet. A constant current source is applied to the interior of the electrically conducting tube by probes and a voltmeter is connected between other probes to measure the voltage at the point of current injection, which is inversely proportional to the amount of contact between the tube and tubesheet. Namely, the higher the voltage measured by the voltmeter, the less contact between the tube and tubesheet. 4 figs.

Inventors:
;
Issue Date:
OSTI Identifier:
7278097
Patent Number(s):
5166627 A
Application Number:
PPN: US 7-707538
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-087380
DOE Contract Number:  
AC11-76PN00014
Resource Type:
Patent
Resource Relation:
Patent File Date: 30 May 1991
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; HEAT EXCHANGERS; TUBES; CRACKS; ELECTRIC CONDUCTIVITY; NONDESTRUCTIVE TESTING; ELECTRICAL PROPERTIES; MATERIALS TESTING; PHYSICAL PROPERTIES; TESTING; 200104* - Fossil-Fueled Power Plants- Components

Citation Formats

Kikta, T.J., and Mitchell, R.D. Method and apparatus for remote tube crevice detection by current and voltage probe resistance measurement. United States: N. p., 1992. Web.
Kikta, T.J., & Mitchell, R.D. Method and apparatus for remote tube crevice detection by current and voltage probe resistance measurement. United States.
Kikta, T.J., and Mitchell, R.D. Tue . "Method and apparatus for remote tube crevice detection by current and voltage probe resistance measurement". United States.
@article{osti_7278097,
title = {Method and apparatus for remote tube crevice detection by current and voltage probe resistance measurement},
author = {Kikta, T.J. and Mitchell, R.D.},
abstractNote = {A method and apparatus for determining the extent of contact between an electrically conducting tube and an electrically conductive tubesheet surrounding the tube, based upon the electrical resistance of the tube and tubesheet. A constant current source is applied to the interior of the electrically conducting tube by probes and a voltmeter is connected between other probes to measure the voltage at the point of current injection, which is inversely proportional to the amount of contact between the tube and tubesheet. Namely, the higher the voltage measured by the voltmeter, the less contact between the tube and tubesheet. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {11}
}