Study on the Pigging Process of Rich Gas Pipeline

Abstract:

Intensive study on flowing properties of two-phase fluid of gas and liquid during pipeline pigging helps to improve the safety operation of rich gas pipeline. Therefore, based on the multiphase fluid transient simulation software, a two-fluid model is employed to study the flowing regulation of gas and liquid in practical operation of natural gas pipeline pigging,especially the change rule of velocity,flow pattern, pressure, liquid holdup ratio, and liquid slug in the passing ball process. The results reveal that three flow patterns appeared in pipeline pigging. They are stratified flow, slug flow and bubble flow. The place where the particular flow pattern appears is related to the terrain. The biggest pressure is found at the entrance, then pressure comes down along the pipeline, and fluctuate according to the fluid amount and terrain; the transient velocity of pig is coherent with the terrain and liquid holdup ratio; small slug flows are easy to gather and form into a longer one. The research can somehow guide to the safety operation of natural gas pipeline pigging.

• Periodical: Advanced Materials Research (Volumes 884-885)
• Pages: 242-246
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.884-885.242
• Online since: January 2014
• Authors: Wei Qiang Wang, Kai Feng Fan, Yu Fei Wan, Ming Wu, Le Yang
• Keywords: Numerical Simulation, Pipeline Pigging, Rich Gas Pipeline, Slug Flow

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