Published August 1990 | Version v1
Report Restricted

The detection of outside corrosion defects of pipelines by electromagnetic means

Creators

Description

Different electro-magnetic methods are investigated for the purpose of pipeline-inspection. The detection of corrosion induced cracks and pits within the tube wall and the outside of the tube including their location parameters measured from the inside of the tube are of main interest. Measurements on the basis of conventional eddy-current methods and flux-method are compared with the remote field eddy-current method with respect of the detectivity of artificial defects. And finally because of the different constraints a possible but limited implementation of such a vehicle is discussed. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Fuer die Zwecke der Pipeline-Ueberwachung werden elektro-magnetische Mess-Methoden mit der Zielvorstellung untersucht, riss- und lochartige Materialfehler in der Wandung und an der aussenseitigen Oberflaeche des Rohres einschliesslich ihrer Ortskoordinaten zu detektieren, wobei die Mess-Anordnung im Innern des Rohres vorangetrieben wird. Streufluss-, Remanenz- und Fernfeld-Wirbelstrom-Messungen werden hinsichtlich der Detektierbarkeit von kuenstlichen Fehlern miteinander verglichen und damit ihre Einsatzgrenzen fuer die obige Aufgabenstellung behandelt. (orig.)

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Additional details

Additional titles

Original title (German)
Elektro-magnetische Untersuchungen zur Detektion von innen- und aussenseitigen Schadstellen an Stahlrohren

Publishing Information

Imprint Pagination
43 p.
Report number
KFK--4765

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
22004422
Subject category
S42: ENGINEERING;
Descriptors DEI
COMPARATIVE EVALUATIONS; CORROSION; DEFECTS; ELECTROMAGNETIC TESTING; INSPECTION; MONITORING; PIPELINES; STEELS
Descriptors DEC
ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; EVALUATION; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS TESTING; NONDESTRUCTIVE TESTING; TESTING