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American Petroleum Institute

About the American Petroleum Institute

Formed in 1919 as a standards-setting organisation, the American Petroleum Institute is a leading non-profit organisation. It has led the development of petroleum, natural gas, petrochemical equipment and operational standards for over 90 years. Their mission is to promote safety across the industry globally, and to influence public policy in support of a strong, viable U.S. oil and natural gas industry. 


Intertek Inform: Your Gateway to the American Petroleum Institute

API Standards drive consistency, innovation, and fairness in the industry. They ensure superior product invention and manufacturing, critical service delivery, and marketplace equity. Widely adopted globally, these standards foster acceptance by industry and governments, promoting international trade and collaboration. 

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Specification for Wellhead and Tree Equipment, Twenty-First Edition
Design and Construction of Large, Welded, Low-Pressure Storage Tanks, Twelfth Edition, Includes Addendum 1 (2014) and Addendum 2 (2018)
Venting atmospheric and low-pressure storage tanks
Valve Inspection and Testing
Specification for Wellhead and Tree Equipment, Twenty-First Edition
Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries
Refractory Installation Quality Control-Inspection and Testing Monolithic Refractory Linings and Materials
Pulsation and Vibration Control for Positive Displacement Machinery Systems for Petroleum, Chemical, and Natural Gas Industry Services
Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems
Inspection Practices for Piping System Components
Piping Inspection Code: In service Inspection, Rating, Repair, and Alteration of Piping Systems
Design, Verification, and Application of Solid Expandable Systems
Gauging and Inspection of Casing, Tubing, and Line Pipe Threads
Recommended Practice for Railroad Transportation of Line Pipe
Measurement of Multiphase Flow
Design and Analysis of Stationkeeping Systems for Floating Offshore Structures
Drilling Fluids Materials
Guidelines for Design and Manufacture of Surface Wellhead Running, Retrieving and Testing Tools, Clean-out Tools and Wear Bushings, First Edition
Standard for Actuators and Mounting Kits for Valves
Welding Services for Equipment Used in the Petroleum and Natural Gas Industry, First Edition
Metal Ball Valves—Flanged, Threaded, and Welding Ends
Installation, Operation, Maintenance, Inspection, and Repair of Tanks in Production Service
Threading and Gauging of Rotary Shouldered Connections
Pipeline Public Engagement
Testing Protocols—Flow Computational Device
Subsurface Safety Valve and Annular Safety Valve Equipment
Temperature Determination, Part 4—Dynamic Temperature Measurement
Burners for Fired Heaters in General Refinery Services
Drill Stem Performance Properties
CRA Clad or Lined Steel Pipe
API MPMS CH 9.3: Standard Test Method for Density, Relative Density, and API Gravity of Crude Petroleum and Liquid Petroleum Products
Standard Practice for Sampling and Handling of Fuels for Volatility Measurement
Management of Hazards Associated with Location of Process Plant Tents
Management of Hazards Associated with Location of Process Plant Permanent Buildings
Measurement and Sampling of Liquid Hydrocarbon Cargoes Using Closed and Restricted Equipment
Medium Voltage Equipment Used on Subsea Production Systems

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Frequently Asked Questions

A standard enhances the safety of industry operations, assures quality, and helps keep costs down to reduce waste and minimise confusion.

API’s Training Certification Program provides third- party certification for a variety of oil and gas industry training courses, ensuring that any training provided meets industry standards.   

The American Petroleum Institute (API), is the principal standards body around the world for engine oil and lubricants. It is primarily responsible for developing, maintaining and promoting petroleum related standards to enhance operational and environmental safety, efficiency and sustainability.  

The American Petroleum Institute is an independent, non-governmental organisation. The API receives substantial funding from major oil conglomerates, including Royal Dutch Shell, ExxonMobil, Chevron, and BP. These companies contribute millions of dollars to API, reinforcing its power and influence. API represents over 625 members, which encompass various segments of the US oil and natural gas industry. These member companies engage in exploration, production, refining, marketing, distribution, and marine activities across the globe.

API represents all segments of America’s oil and natural gas industry. They have more than 600 members who produce, process and distribute most of the nation’s energy.  In their first 100 years, the American Petroleum Institute developed more than 800 standards to enhance operational and environmental safety, efficiency and sustainability both nationally, and in countries around the globe.

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