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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.
Petroleum and Liquid Petroleum Products-Calibration of Horizontal Cylindrical Tanks- Part 2: Internal Electro-optical Distance-ranging Method, First Edition
Standard published on 1.4.2004
Selected format:Calibration of Upright Cylindrical Tanks Using the Total Station Reference Line Method, First Edition
Standard published on 1.7.2014
Selected format:Manual of Petroleum Measurement Standards Chapter 2.4 Measurement and Calibration of Tank Cars, First Edition
Standard published on 1.12.2024
Selected format:Tank Calibration: Calibration of Barge Tanks, Includes Addendum 1 (2021)
Standard published on 1.3.1991
Selected format:Addendum 1 for Tank Calibration: Calibration of Barge Tanks
Adjunct of the standard published on 1.9.2021
Selected format:Tank Calibration: Calibration of Tanks on Ships and Oceangoing Barges
Standard published on 1.3.1991
Selected format:Recommended Practice for the Establishment of the Location of the Reference Gauge Point and the Gauge Height of Tanks on Marine Tank Vessels
Standard published on 1.8.1995
Selected format:Allocation Measurement of Oil and Natural Gas: Allocation Measurement, First Edition, Includes Addenda 1 (2013), 2 (2016), 3 (2017), and Errata 1 (2022)
Standard published on 31.7.1993
Selected format:Addendum to Allocation Measurement of Oil and Natural Gas: Allocation Measurement
Adjunct of the standard published on 1.1.2013
Selected format:Addendum 2 to Allocation Measurement of Oil and Natural Gas: Allocation Measurement
Adjunct of the standard published on 1.11.2016
Selected format:Latest update: 2026-10-23 (Number of items: 2 207 789)
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