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Diagnostics of valves on the gas pipeline
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The work of the gas transmission pipeline system is regulated by the thousands of valveses and other elements of the shut-off valves, located in different places. Information about the current status of each valve, and confidence in its technical serviceability is an important element in the control of pipeline system. There are a number of problems that adversely affect the  valving operation. Principal among them - is the lack of siystematical approach in valving diagnostics.

To solve this problem, developed a new approach to the valving diagnostics – multi-level diagnostics. Depending on the level of diagnosis, we get a different amount of information about the object.


The focus is on the 3rd level of diagnosis, which allows to determine the leackages of valves, and identify type of defects quantitatively. This level of diagnosis is regarded as an example of Method «Micropuls».

The method «Micropuls» based on the theory of mechanical vibrations and forced with high accuracy to set the time, frequency and spectral characteristics of noise in the details of the valve, and their spatial location and intensity of that in the presence of a system of analysis allows to determine the state of the object, its faults and defects.

Micropulse technology is based on the impact on the measured object micropower impulses, records the response and subsequent filtering, decoding and analyzing the data.                    Specially designed calibrated pulses can effectively influence the measured objects (valve) over a wide range of structural dimensions and mounting schemes, regardless of physical location of the valve.


Place, publisher, year, edition, pages
2012. , 63 p.
Keyword [en]
valves, diagnostic
National Category
Energy Engineering
URN: urn:nbn:se:kth:diva-101377OAI: diva2:547234
Subject / course
Energy Technology
Educational program
Master of Science - Sustainable Energy Engineering
2012-06-08, Leninsky Prospekt 65, 10:23 (English)
Available from: 2012-08-27 Created: 2012-08-27 Last updated: 2016-04-26Bibliographically approved

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Malakhatka, Elena
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