Method of detecting corrosion in pipelines and the like by compa

Details Method of detecting corrosion in pipelines and the like by compa Method of detecting corrosion in pipelines and the like by compa

1998-06-04

2000-05-23

Noori, Max

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73579, 73600, G01N 2904

Patent

active

060653485

ABSTRACT:
A method of detecting corrosion on an elongate member, such as a pipe. Far side and near side electric pulses (waves) are transmitted into a magnetically permeable pipe at spaced locations to travel toward one another. These are synchronized to intersect at various locations on the pipe. The resulting wave forms are analyzed by combining adjacent wave forms resulting from pulses intersection at spaced locations. Two combined wave forms are analyzed by subtracting one from the other to produce a difference wave form and the difference wave forms are compared to detect corrosion.

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patent: 4970467 (1990-11-01), Burnett
patent: 5456113 (1995-10-01), Kwun et al.
patent: 5457994 (1995-10-01), Kwun et al.
patent: 5497661 (1996-03-01), Stripf et al.

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