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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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API SPEC 6A:2018
Specification for Wellhead and Tree Equipment, Twenty-First Edition
API 620:2013+ADD 2:2018
Design and Construction of Large, Welded, Low-Pressure Storage Tanks, Twelfth Edition, Includes Addendum 1 (2014) and Addendum 2 (2018)
API 5L:2018
API 2000:2014
Venting atmospheric and low-pressure storage tanks
API 598 : 2016
Valve inspection and testing
API SPEC 6A : 2018
Specification for Wellhead and Tree Equipment, Twenty-First Edition
API TR 6RT:2020
Guidelines for Design and Manufacture of Surface Wellhead Running, Retrieving and Testing Tools, Clean-out Tools and Wear Bushings, First Edition
API STD 6DX:2020
Standard for Actuators and Mounting Kits for Valves
API STD 20G:2020
Welding Services for Equipment Used in the Petroleum and Natural Gas Industry, First Edition
API 608:2020
Metal Ball Valves—Flanged, Threaded, and Welding Ends
API 12R1:2020
Installation, Operation, Maintenance, Inspection, and Repair of Tanks in Production Service, Sixth Edition
API SPEC 7-2:2017+ADD 1:2020
Threading and Gauging of Rotary Shouldered Connections
Mechanical systems and components for general use
Energy and heat transfer engineering
Petroleum and related technologies

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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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