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American Gas Associations The American Gas Association’s Gas Measurement Manuals provide a comprehensive outline of the gas measurement industry. These standards include a brief history of gas measurement, descriptions of the most salient business practices and theories of operation, as well as a lengthy glossary of terms. Optimal practices for the selection, installation, and maintenance of measurement and monitoring equipment are provided; the use of inferential, orifice, displacement, and turbine meters are presented. Guidelines for sampling and analyzing gases, varying computation techniques, and the methods of identifying specific gas properties such as gravity, heating value, moisture content, sulfur, temperature, pressure, supercompressibility, density, total composition and proper odorization are featured.

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AGA XQ1081

Gas Measurement Manuals - Part 1: General (Revised)

Contains a brief history of gas measurement, fundamental gas laws, metering, principles of measurement and glossary of terms.


AGA XZ0277

Gas Measurement Manuals - Part 2: Displacement Metering (Revised)

Contains information relating to current industry practices and available equipment, as well as acceptable procedures for installing, testing, operating and maintaining large-capacity diaphragm and rotary displacement meters.


AGA XQ9011

Gas Measurement Manuals - Part 3: Orifice Meters

Encompasses the theory of operation, design and installation of primary and secondary elements in accordance with AGA Report No. 3/ANSI/API 2530. Also includes information on calibration and testing equipment and common causes of measurement error.


AGA XQ0684

Gas Measurement Manuals - Part 4: Gas Turbine Metering (Revised)

Provides information on the theory of operation, performance characteristics, installation and maintenance of turbine meters; describes the technique for flow computation; discusses density and rangeability; and provides a section on calibration testing.


AGA XQ0483

Gas Measurement Manuals - Part 5: Other Measurement Methods (Revised)

Provides measurement procedures for inferential meters (does not cover positive-displacement meters). Section 5.1 covers LNG custody-transfer procedures.


AGA XQ0779

Gas Measurement Manuals - Part 6: Auxiliary Devices


AGA XQ0379

Gas Measurement Manuals - Part 7: Measurement Calculations and Data Gathering (Revised)

Provides information on chart calculations for orifice, displacement and turbine meters; and fixed-pressure factor metering.


AGA XQ8805

Gas Measurement Manuals - Part 8: Electronic Flow Computers and Transducers (Revised)

Provides information on chart calculations for orifice, displacement and turbine meters; and fixed-pressure factor metering.


AGA XQ8803

Gas Measurement Manuals - Part 9: Design of Meter and Regulator Stations (Revised)

Provides guidelines for the design of meter and regulatory stations, including station specifications, regulators and control valves. It also includes piping configuration, meter types, automation and preparation of natural gas for market.


AGA XQ0584

Gas Measurement Manuals - Part 10: Pressure and Volume Control (Revised)

Provides information regarding the fundamentals of gas regulators: their function, control, operation and maintenance. One section is devoted to noise abatement at measurement and control stations.


AGA XQ8804

Gas Measurement Manuals - Part 11: Measurement of Gas Properties (Revised)

Provides guidelines for sampling and analyzing natural gas to determine specific gravity, heating value, moisture content, sulfur, temperature, pressure, supercompressibility, density, total composition and proper odorization.


AGA XQ0278

Gas Measurement Manuals - Part 12: Meter Proving; and Part 13: Distribution Meter Data (Revised)

These two parts are combined and published as a single document. Part 12 covers bell provers, transfer testing and field-testing of meters. Part 13 covers in-service performance, meter test programs and meter records.


AGA XQ0381

Gas Measurement Manuals - Part 14: Meter Repair and Selection

Covers meter testing and repair, handling, quality control, metering economics, meter shop design, meter selection and purchase specifications.


AGA XQ9901

Gas Measurement Manuals - Part 15: Electronic Corrector

A manual on electronic devices for real-time measurement of gas volume corrected to standard pressure and temperature. It provides important information for selection, installation and operation of electronic correctors.