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Title: WHATS NEW IN AGA REPORT #9 2017
Author: David Crandall
Source: 2018 Appalachian Gas Measurement Short Course
Year Published: 2018
Abstract: AGA Report No. 9 is a performance based specification for multipath ultrasonic flow meters typically used in custody transfer applications for natural gas. In July 2017, AGA Report No. 9 Third Edition was published as an update to the previous second edition dated April 2007. The document provides complete information on ultrasonic meters terminology, operating conditions, meter requirements, installation, calibration, and commissioning. There are also five Appendices describing Calibration, Electronics design testing, flow meter package and/or flow conditioner performance verification tests, uncertainty calculation examples, and USM commissioning and verification tests. First and foremost, these are performance based specifications, meaning the equipment has flexibility in terms of design but it must meet certain performance and design criteria defined in the standard. This paper highlights the significant changes incorporated in the third edition because of advances in technology and the practical applications experience gained since the prior edition.

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