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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.
Evaporative Loss from Closed-vent Internal Floating-roof Storage Tanks
Standard published on 1.8.2008
Selected format:Continuous On-line Measurement of Water Content in Petroleum (Crude Oil and Condensate)
Standard published on 1.10.2010
Selected format:Carbon Content, Sampling, and Calculation
Standard published on 1.5.2013
Selected format:Standard Guide for Sediment and Water Determination in Crude Oil
Standard published on 1.9.2018
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
Standard published on 1.8.2016
Selected format:Measurement of Thermally Cracked Gas
Standard published on 1.9.2014
Selected format:Short-term Evaporative Loss Estimation from Atmospheric Storage Tanks
Standard published on 1.7.2016
Selected format:Performance of Full-bore Vortex Meters for Measurement of Liquid Flows
Standard published on 1.7.2018
Selected format:Flow Conditioner Installation and Effects on Turbine Meters
Standard published on 1.10.2017
Selected format:Liquid Hydrocarbon Measurement Uncertainty Calculations
Standard published on 1.9.2020
Selected format:Latest update: 2025-07-27 (Number of items: 2 209 911)
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