10.14489/td.2015.01.pp.082-089

2015, 01 January

DOI: 10.14489/td.2015.01.pp.082-089

Gomera V.P., Rastegaev I.A.
THE POSSIBILITY OF THE EARLY IDENTIFICATION OF DELAMINATION IN THE WALLS OF PRESSURE VESSELS BY THE ULTRASONIC AND ACOUSTIC EMISSION INSPECTION
(pp. 82-89)

Abstract. Relations between the results obtained by various non-destructive techniques such as visual, ultrasonic and acoustic-emission are dis-cussed on the examples of delamination of the pressure in the vessels shells. The sequence of stages in the history of defect development is suggested by comparing the results of the examination of industrial facilities in notably different technical conditions due to the fact that time in operation is different too. The problem of the impact of the testing methods sensitivity on timely defect detection is discussed. A promising approach to determination of the stage of delaminations is proposed based on the spectral analysis of located acoustic emission events. The feasibility of early delamination diagnosis by acoustic emission and ultrasonic inspection methods is demonstrated and new ways towards enhanced efficiency of these techniques are proposed. Given examples are accompanied with the detailed description of all procedures involved in the acoustic emission testing and equipment tuning, enabling thereby the transfer of the proposed approach to the analysis of similar objects.

Keywords: nondestructive testing, pressure vessels, delamination steel, blisters, hydrogen cracking.

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V. P. Gomera
Kirishinefteorgsintez, Kirishi, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

I. A. Rastegaev
Togliatti State University, Togliatti, Russia

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