Monitoring of defects of underground transmission pipelines using Acoustic Emission

Michał Bardadyn

Abstract

Leak detection is one of the most important issues in the oil and gas pipelines, as it can lead to financial losses, as well as severe human and environmental impacts. Acoustic emission test is a new technique for leak detection. Leakage in high pressure pipes creates stress waves caused by localized loss of energy. Stress waves are transmitted through the pipe wall which can be recorded by using acoustic sensor or accelerometer installed on the pipe wall. Knowledge of how the pipe wall is vibrated by acoustic emission resulting from leakage is a key parameter for leak detection and localization. The aim of the study was to examine the possibility of experimental detection and locate the leak in the transmission pipelines. Innovation conducted research is to examine the possibility of registering a leak from the pipeline, using the medium as a substance carrying the acoustic waves. The thesis presented the first results of research on acoustic system, which using the method of acoustic emission (AE) to monitor defects in underground pipelines. The research aimed at obtaining laboratory basis for interpretation of results obtained in real conditions and to correct design research stand to develop AE method for testing underground pipelines. The studies have shown that on the possibility of AE monitoring the defects in underground pipelines are affected by material from which are made the pipeline, filling level, type of transported medium and conditions such as flow, pressure and velocity. The detection and location of acoustic emission sources must be preceded by the execution of system calibration and calculation of basic quantities such as the level of the acoustic attenuation and the velocity of elastic waves propagation in the material. Studies has also shown that a sensor within the pipeline, in many cases is more effective than sensors mounted on the outside as it has a greater resistance to interference. The research showed that the acoustic emission method is a suitable tool for technical-service of underground pipelines enabling detection, location and estimation of existing defects, growing in the microscopic and macroscopic scale of the material. The work briefly discusses the current state of the issue, based on the latest knowledge and research experience in underground transmission pipelines. Transport module equipped with a sensor AE and a camera allows for an effective assessment of the possible risks and monitor the status of the pipeline. With its help, it is possible also explore the pipeline, which can not be covered by the standard control.
Diploma typeMaster of Science
Author Michał Bardadyn ZPM
Michał Bardadyn,,
- Division of Materials Design
Title in PolishMonitorowanie wad podziemnych rurociągów przesyłowych z wykorzystaniem emisji akustycznej
Supervisor Krzysztof Kurzydłowski ZPM
Krzysztof Kurzydłowski,,
- Division of Materials Design
Certifying unitFaculty of Materials Science and Engineering (FMSE)
Affiliation unitDivision of Materials Design (DMD)
Study subject / specializationInżynieria Materiałowa
Languagepl polski
StatusFinished
Defense Date15-01-2014
Issue date (year)2013
Internal identifierIM-D.001755
Reviewers Wojciech Święszkowski ZPM
Wojciech Święszkowski,,
- Division of Materials Design
, Halina Garbacz ZPM
Halina Garbacz,,
- Division of Materials Design
Keywords in PolishEMISJA AKUSTYCZNA, RUROCIĄGI
File
Monitorowanie wad podziemnych rurociągów przesyłowych z wykorzystaniem AE.docx 10.09 MB

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