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Title: TROUBLESHOOTING LIQUID PIPELINE LOSSES AND GAIN
Author: Joseph T. Rasmussen, Michael R. Plasczyk
Source: 2022 International School of Hydrocarbon Measurement
Year Published: 2022
Abstract: Liquid pipelines are integrated transportation networks providing multiple services for many shippers and customers. These systems may connect to multiple origins and destinations, and carry various products across long distances with changing elevation profiles, pipe dimensions and directions. Expectations are that the volumes received in the system are equivalent to the volumes delivered, with the exception of inventory changes. But in reality, every pipeline system will experience a loss or gain over time. Monitoring pipeline losses and gains employs tools and analysis methods developed specifically to troubleshoot pipeline variances. Evaluation of pipeline losses and gains uses basic statistical tools as well as intuitive and creative insight into what controls losses and gains. The basic tool for evaluating system performance is Loss/Gain, a measure of how well receipts, deliveries and inventory match up over a period of time. The concept is similar to that used for leak detection, but usually covers a longer time period. Loss/gain is a measure of the quality of the overall measurements in a system, and excessive loss/gain can signal the need for an investigation to identify causes and develop corrective actions.

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