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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.
Custody Transfer of Crude Oil from Lease Tanks Using Alternative Measurement Methods, First Edition
Standard published on 1.7.2016
Selected format:Study of Used Motor Oil in Recyclying in Eleven Selected Countries
Standard published on 1.11.1997
Selected format:Product Life Cycle Management System Requirements for the Petroleum and Natural Gas Industries, First Edition
Standard published on 1.4.2017
Selected format:Guidance on Changes to API Q1 (Ninth Edition), First Edition
Standard published on 1.6.2015
Selected format:Guidance to API Specification Q2, First Edition
Standard published on 1.12.2017
Selected format:Evaluation of Welding Requirements as Applicable to API Product Specifications, First Edition
Standard published on 1.12.2017
Selected format:Evaporative Loss from Fixed-Roof Tanks, Fifth Edition
Standard published on 1.6.2017
Selected format:Evaporative Loss from Low-pressure Tanks
Standard published on 1.3.1962
Selected format:Evaporative Loss from Floating-roof Tanks, Fourth Edition
Standard published on 1.8.2020
Selected format:Specification for Establishing Evaporative Loss Factors for Floating-roof Tank Devices
Standard published on 1.4.2022
Selected format:Latest update: 2026-03-18 (Number of items: 2 266 854)
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