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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.
Shop Testing of Automatic Liquid-Level Gages
Standard published on 1.1.1961
Selected format:Design and Construction of LPG Installations, Ninth Edition
Standard published on 1.8.2020
Selected format:Fire-protection Considerations for the Design and Operation of Liquefied Petroleum Gas (LPG) Storage Facilities, Third Edition
Standard published on 1.11.2025
Selected format:Evaporation Loss from Low-Pressure Tanks
Standard published on 1.3.1962
Selected format:Documentation File for API Publication 2519, Evaporation Loss from Internal Floating-Roof Tanks
Standard published on 1.3.1993
Selected format:Use of Pressure-Vacuum Vent Valves for Atmospheric Loss
Standard published on 1.9.1966
Selected format:Impact Assessment of New Data on the Validity of American Petroleum Institute Marine Transfer Operation Emission Factors
Standard published on 1.7.1992
Selected format:Standard Method for Measurement and Calibration of Horizontal Tanks
Standard published on 1.1.1965
Selected format:Measurement and Calibration of Spheres and Spheroids
Standard published on 1.1.1966
Selected format:Measurement and Calibration of Tank Cars
Standard published on 1.10.1966
Selected format:Latest update: 2026-03-17 (Number of items: 2 266 788)
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