Transient hydraulic conditions during a shutdown and subsequent start-up of a segment of a pipeline that runs through a mountainous region were simulated using commercially available hydraulic simulation software and a model of the relevant portion of the pipeline facilities. The segment of interest is located in an area where the pipeline is normally operated with vapor present (slack line flow conditions) due to the large change in elevation. Pressure data that was recorded by the pipeline’s data acquisition system indicated a pressure surge occurred when the line was restarted. The suspected cause of this pressure surge was the collapse of the vapor in this pipeline segment. Beginning with an estimate of the flow, pressure and temperature data for the pipeline segment at steady state conditions prior to the shutdown, the simulation was tuned to reasonably match the measured data. The resulting simulated data closely replicated the surge event. Examination of the simulated data provides insights into the hydraulic conditions in the pipeline at locations where pressure data is not measured, as well as during the time intervals between data acquisition scans. It also reveals impact of the timing of the mainline valve opening sequence. Further, since the simulated data does accurately replicate the actual measured data, the model can be used to evaluate how changes to facilities or operating conditions impact the formation and the collapse of vapor in this pipeline segment.
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2018 12th International Pipeline Conference
September 24–28, 2018
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
978-0-7918-5188-3
PROCEEDINGS PAPER
Validating a Single-Phase Flow Pipeline Simulation Model Against Real Data From a Vapor Collapse Event
Ulli Pietsch,
Ulli Pietsch
TAU Engineering Solutions, Inc., Edmonton, AB, Canada
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Hanna Sieben
Hanna Sieben
TAU Engineering Solutions, Inc., Edmonton, AB, Canada
Search for other works by this author on:
Ulli Pietsch
TAU Engineering Solutions, Inc., Edmonton, AB, Canada
Hanna Sieben
TAU Engineering Solutions, Inc., Edmonton, AB, Canada
Paper No:
IPC2018-78235, V003T04A008; 13 pages
Published Online:
November 6, 2018
Citation
Pietsch, U, & Sieben, H. "Validating a Single-Phase Flow Pipeline Simulation Model Against Real Data From a Vapor Collapse Event." Proceedings of the 2018 12th International Pipeline Conference. Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining. Calgary, Alberta, Canada. September 24–28, 2018. V003T04A008. ASME. https://doi.org/10.1115/IPC2018-78235
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