It is significant to assess the stress concentration degree and forecast the service life of high pressure manifolds in advance which were the main stream flow channel of the acid-fracture liquid in petroleum industry, such as straight tube, bent pipe and tee bend etc. The magnetic memory method is a new NDT method that can detect the microscopic damage on the basis of the magnetostriction and magnetoelasticity effect. The objective of this study was to discuss the selection of the applicable probe type, scanning method, scanning times and procedure of magnetic memory method in response to different high pressure manifolds types. And according to the inspection instances, it was certified that the stress concentration degree can be detected and assessed by the magnetic memory method, and thereby the service life of the high pressure manifolds can be forecasted. Furthermore, the common defects of the high pressure manifolds, such as transverse and longitudinal linear defects, etch pits and wall thickness reduction, can also be detected by magnetic memory method. And the inspection results won't be influenced if the stress were released.
Magnetic memory inspection of high pressure manifolds
Magnetischer Memory-Effekt zur Prüfung von Hochdruckverteilern
2008
7 Seiten, 11 Bilder, 1 Tabelle, 6 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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