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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.
API MPMS Chapter 9-Density Determination, Section 1-Standard Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method, Fourth Edition
Standard published on 1.5.2025
Selected format:API MPMS Chapter 9 - Density Determination, Section 2-Standard Test Method for Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer, Fourth Edition
Standard published on 1.11.2022
Selected format:Standard Test Method for Density, Relative Density, and API Gravity of Crude Petroleum and Liquid Petroleum Products by Thermohydrometer Method, Sixth Edition
Standard published on 1.1.2026
Selected format:Manual of Petroleum Measurement Standards Chapter 9 - Density Determination - Section 4 - Continuous Density Measurement Under Dynamic (Flowing) Conditions, First Edition
Standard published on 1.1.2018
Selected format:Recommended Practice 90-1, Annular Casing Pressure Management for Offshore Wells, Second Edition
Standard published on 1.8.2021
Selected format:Annular Casing Pressure Management for Onshore Wells, First Edition
Standard published on 1.4.2016
Selected format:Management Practices, Self-Assessment Process, and Resource Materials
Standard published on 1.12.1998
Selected format:Planning and Conducting Surface Preparation and Coating Operations for Oil and Natural Gas Drilling and Production Facilities in a Marine Environment, First Edition
Standard published on 1.6.2007
Selected format:Digest of State Boiler, Pressure Vessel, Piping, and Aboveground Petroleum Storage Tank Rules and Regulations
Standard published on 1.11.1997
Selected format:API 9100 Model Environmental, Health & Safety (EHS) Management System and Guidance Document
Standard published on 22.10.1998
Selected format:Latest update: 2026-06-24 (Number of items: 2 284 377)
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