While the transportation of gaseous media in pipelines worldwide is a routine occurrence, the in-line inspection of these assets is more demanding than for liquid pipelines. The most common demands - either low flow and low pressure conditions or high flow and high pressure conditions - require a more specialized configuration of the in-line inspection equipment as a prerequisite for high quality inspection data. Accordingly, low friction sealing elements and robust intelligent bypass valves are commonly incorporated into the ILI tool configurations to help guarantee a safe passage and optimal run conditions. Other demanding requirements for gas lines can include the utilization of liquid batches while using UT tools and accurately identifying pipeline features at unsteady and/or high velocities and pressures. More recently in response to these needs, newly developed ultrasonic technologies are available to detect and characterize cracking without requiring a liquid coupling. Also, high-quality geometry inspection technology offers reporting of small dents and shallow internal corrosion even under highly dynamic run conditions inherent in many pipelines. Current in-line inspection capabilities and options related to gas pipelines are explored in this paper.
Addressing challenging environments - advanced in-line inspection solutions for gas pipelines
2009
12 Seiten, 14 Bilder, 19 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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