Evaluation of depth and profile of surface longitudinal cracks and their growth in DN300 high pressure pipeline

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F17%3AN0000033" target="_blank" >RIV/25797000:_____/17:N0000033 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of depth and profile of surface longitudinal cracks and their growth in DN300 high pressure pipeline

Popis výsledku v původním jazyce

In an operated DN300 high pressure pipeline, crack-like defects were detected by internal inspection methods. The pipeline section could not be therefore further operated without detailed and careful evaluation of its safety and reliability. Several meters long section of the pipeline was taken out from ground for the purpose of experimental laboratory evaluation of the damage extent. Magnetic defectoscopy confirmed an existence of numerous distinct indications of longitudinal defects. Methodology of measurement of depth of these cracks was proposed using direct current potential drop (DCPD) method. An experimental calibration dependence of potentials on crack depth and shape was evaluated in laboratory. Precision limits of the DCPD method being used in this specific case are discussed in the paper, particularly considering inclined shape of the cracks. Results are related to actual crack depth values and their inclination evaluated by metallographic method.

Název v anglickém jazyce

Evaluation of depth and profile of surface longitudinal cracks and their growth in DN300 high pressure pipeline

Popis výsledku anglicky

In an operated DN300 high pressure pipeline, crack-like defects were detected by internal inspection methods. The pipeline section could not be therefore further operated without detailed and careful evaluation of its safety and reliability. Several meters long section of the pipeline was taken out from ground for the purpose of experimental laboratory evaluation of the damage extent. Magnetic defectoscopy confirmed an existence of numerous distinct indications of longitudinal defects. Methodology of measurement of depth of these cracks was proposed using direct current potential drop (DCPD) method. An experimental calibration dependence of potentials on crack depth and shape was evaluated in laboratory. Precision limits of the DCPD method being used in this specific case are discussed in the paper, particularly considering inclined shape of the cracks. Results are related to actual crack depth values and their inclination evaluated by metallographic method.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Conference Proceeding

ISBN

978-802610624-1

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

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Název nakladatele

Department of Mechanics, Faculty of Applied Sciences, University of West Bohemia

Místo vydání

Plzeň

Místo konání akce

Srní

Datum konání akce

30. 5. 2016

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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