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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.
Carbon Content, Sampling, and Calculation, First Edition
Standard published on 1.5.2013
Selected format:Standard Guide for Sediment and Water Determination in Crude Oil
Standard published on 1.9.2013
Selected format:Field Testing Protocol for Characterization of Total Gaseous Nonmethane Organics (TGNMO), Methane, and Ethane in Air-Vapor Mixture During Filling of a Cargo Vessel with Crude Oil, First Edition
Standard published on 1.8.2016
Selected format:Measurement of Thermally Cracked Gas, First Edition
Standard published on 1.9.2014
Selected format:Short-term Evaporative Loss Estimation from Atmospheric Storage Tanks, First Edition
Standard published on 1.7.2016
Selected format:Performance of Full-bore Vortex Meters for Measurement of Liquid Flows, First Edition
Standard published on 1.7.2018
Selected format:Flow Conditioner Installation and Effects on Turbine Meters, First Edition
Standard published on 1.10.2017
Selected format:Liquid Hydrocarbon Measurement Uncertainty Calculations, First Edition
Standard published on 1.9.2020
Selected format:Documentation Report for API MPMS Chapter 11.3.3 and API MPMS Chapter 11.3.4, First Edition
Standard published on 1.5.2019
Selected format:Wet Gas Sampling, First Edition, Includes Errata 1 (2025)
Standard published on 1.5.2024
Selected format:Latest update: 2026-03-17 (Number of items: 2 266 788)
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