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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.
Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids - Concentric, Square-edged Orifice Meters Part 2: Specification and Installation Requirements
Standard published on 1.1.2019
Selected format:Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids—Concentric, Square-edged Orifice Meters Part 3: Natural Gas Applications
Standard published on 1.6.2021
Selected format:ORIFICE METERING OF NATURAL GAS AND OTHER RELATED HYDROCARBON FLUIDS - CONCENTRIC, SQUARE-EDGED ORIFICE METERS PART 3: NATURAL GAS APPLICATIONS
Standard published on 1.11.2013
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
Standard published on 1.10.2019
Selected format:Manual of Petroleum Measurement Standards Chapter 14-Natural Gas Fluids Measurement Section 4-Converting Mass of Natural Gas Liquids and Vapors to Equivalent Liquid Volumes
Standard published on 1.6.2017
Selected format:Calculation of Gross Heating Value, Relative Density, Compressibility and Theoretical Hydrocarbon Liquid Content for Natural Gas Mixtures for Custody Transfer
Standard published on 1.11.2020
Selected format:Manual of Petroleum Measurement Standards Chapter 14—Natural Gas Fluids Measurement Section 7—Mass Measurement of Natural Gas Liquids and Other Hydrocarbons
Standard published on 1.7.2023
Selected format:Global Emissions of Carbon Dioxide from Petroleum Sources
Standard published on 1.7.1993
Selected format:HEALTH AND ENVIRONMENTAL SCIENCES DEPARTMENTAL REPORT - IDENTIFICATION OF ORGANIC TOXICANTS IN TREATED REFINERY EFFLUENTS
Standard published on 1.12.1997
Selected format:Subsurface Safety Valve and Annular Safety Valve Equipment
Standard published on 1.3.2024
Selected format:Latest update: 2025-07-11 (Number of items: 2 208 012)
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