EP 0998678 A4 20020213 - METHOD OF DETECTING CORROSION IN PIPELINES AND THE LIKE BY COMPARATIVE PULSE PROPAGATION ANALYSIS
Title (en)
METHOD OF DETECTING CORROSION IN PIPELINES AND THE LIKE BY COMPARATIVE PULSE PROPAGATION ANALYSIS
Title (de)
VERFAHREN ZUM NACHWEIS VON KORROSION IN ROHRLEITUNGEN O.A. MIT HILFE VERGLEICHENDER PULSAUSBREITUNGSANALYSE
Title (fr)
PROCEDE DE DETECTION DE CORROSION DANS DES PIPELINES ET ANALOGUE PAR ANALYSE COMPARATIVE D'IMPULSIONS DE PROPAGATION
Publication
Application
Priority
- US 9811683 W 19980604
- US 4866097 P 19970604
Abstract (en)
[origin: WO9855877A1] A method of dectecting corrosion on an elongate member (10), such as a pipe (10). Far side and near side electric pulses are transmitted into a magnetically permeable pipe (10) at spaced locations to travel toward one another. These are synchronized to intersect at various locations on the pipe (10). The resulting waveforms are analyzed by combining adjacent waveforms resulting from pulses intersection at spaced locations. Two combined waveforms are analyzed by subtracting one from the other to produce a difference waveform and the difference waveforms are compared to detect corrosion.
IPC 1-7
IPC 8 full level
G01N 17/00 (2006.01)
CPC (source: EP)
G01N 17/00 (2013.01)
Citation (search report)
- [X] EP 0399583 A2 19901128 - BURNETT GALE D [US]
- [X] WO 9628743 A1 19960919 - PROFILE TECHNOLOGIES INC [US], et al
- [A] US 5189374 A 19930223 - BURNETT GALE D [US]
- [A] US 5243294 A 19930907 - BURNETT GALE D [US]
- See references of WO 9855877A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9855877 A1 19981210; AU 7954598 A 19981221; CA 2293500 A1 19981210; CA 2293500 C 20101214; EP 0998678 A1 20000510; EP 0998678 A4 20020213
DOCDB simple family (application)
US 9811683 W 19980604; AU 7954598 A 19980604; CA 2293500 A 19980604; EP 98930074 A 19980604