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Title: ULTRASONIC METERS AND MEASUREMENT ACCURACY IN LEAK DETECTION
Author: Tony Petitto
Source: 2018 International School of Hydrocarbon Measurement
Year Published: 2018
Abstract: Pipeline operators are committed to safely transporting petroleum and refined products in an error-free and spill-free manner. To achieve this safety goal, pipeline integrity management programs are developed and maintained. These programs are primarily designed to prevent the unintended releases of liquid hydrocarbons, but when such releases happen, quickly detecting them, and activating response plans to mitigate their effects, is very important. Leak Detection Systems (LDS) are deployed to promptly alert pipeline operators that a release has potentially occurred, and to determine the size and location of the leak. Different methods, often used in combination, are used by LDS to accomplish this. Some of these methods use algorithms to detect hydraulic anomalies in pipelines, and are described by API RP 1130 as Computational Pipeline Monitoring (CPM) systems. The majority of CPMs use pipeline operational variables to perform their calculations, and flow rate is one of the most important of them. Liquid ultrasonic meters, because of their non-intrusive design, negligible pressure drop, high accuracy, and diagnostics capabilities, have demonstrated to be one of the best choices when it comes to providing flow to CPM algorithms. This paper describes the important relationship between the accuracy of the ultrasonic meters and the sensitivity, reliability, robustness, and accuracy of the Leak Detection Systems.

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