API Standards – Request Official Documents Online 2026

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API MPMS Ch. 20.5

Recommended Practice for Application of Production Well Testing in Measurement and Allocation

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API MPMS Ch. 21.1

Flow Measurement Using Electronic Metering Systems—Electronic Gas Measurement

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API MPMS Ch. 21.2

Electronic Liquid Volume Measurement Using Positive Displacement and Turbine Meters

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API MPMS Ch. 21.2-A1

Addendum 1 to Flow Measurement Using Electronic Metering Systems, Inferred Mass

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API MPMS Ch. 22.1

General Guidelines for Developing Testing Protocols for Devices Used in the Measurement of Hydrocarbon Fluids

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API MPMS Ch. 22.2

Testing Protocols—Differential Pressure Flow Measurement Devices

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API MPMS Ch. 22.3

Testing Protocol for Flare Gas Metering

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API MPMS Ch. 22.4

Testing Protocol for Pressure, Differential Pressure, and Temperature Measuring Devices

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API MPMS Ch. 22.6

Testing Protocol for Gas Chromatographs

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API MPMS Ch. 22.7

Testing Protocol for Multiphase Meter

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API MPMS Ch. 23.1

Reconciliation of Liquid Pipeline Quantities

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API MPMS Ch. 23.2

Reconciliation of Liquid Tank Car(s)Quantities

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