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API (American Petroleum Institute) is a leader in the development of petroleum and petrochemical equipment and operating standards covering topics that range from drill bits to environmental protection. These embrace proven, sound engineering and operating practices and safe, interchangeable equipment and materials. Many have been incorporated into state and federal regulations and adopted by ISO for worldwide acceptance.
Addendum 1 to Stress Corrosion Cracking of Corrosion Resistant Alloys in Halide Brines Exposed to Acidic Production Gas, First Edition
Adjunct of the standard published on 7.7.2022
Selected format:Size Measurement of Dry, Granular Drilling Fluid Particulates, First Edition
Standard published on 1.10.2018
Selected format:Collecting and Handling of Natural Gas Samples for Analysis by Gas Chromatography, Eighth Edition
Standard published on 1.9.2022
Selected format:Natural Gas Fluids Measurement - Measurement of Flow to Flares, Second Edition
Standard published on 1.12.2021
Selected format:Manual of Petroleum Measurement Standards, Chapter 14-Natural Gas Fluids Measurement, Section 12-Measurement of Gas by Vortex Meters, First Edition
Standard published on 1.3.2017
Selected format:Manual of Petroleum Measurement Standards Chapter 14.13 Simplified Metering System Design and Performance-based Methodology for Non-custody Gas Measurement, First Edition
Standard published on 1.10.2022
Selected format:Venturi Metering of Natural Gas and Other Related Hydrocarbon Fluids, First Edition
Standard published on 1.3.2023
Selected format:Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids - Concentric, Square-edged Orifice Meters, Part 4: Background, Development, Implementation Procedure, and Example Calculations, Fourth Edition, Includes Errata 1 (2024)
Standard published on 1.10.2019
Selected format:Errata 1 to Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids - Concentric, Square-edged Orifice Meters, Part 4: Background, Development, Implementation Procedure, and Example Calculations, Fourth Edition, Includes Errata 1 (2024)
Adjunct of the standard published on 1.5.2024
Selected format:Errata for Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids - Concentric, Square-edged Orifice Meters - Part 1: General Equations and Uncertainty Guidelines, Fourth Edition
Adjunct of the standard published on 1.7.2013
Selected format:Latest update: 2025-12-20 (Number of items: 2 252 706)
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