American Petroleum Institute Inc. (API)


American Petroleum Institute (API) represents all segments of America’s oil and natural gas industry. Its more than 600 members produce, process, and distribute most of the nation’s energy. The industry supports 10.9 million U.S. jobs and is backed by a growing grassroots movement of more than 47 million Americans. API was formed in 1919 as a standards-setting organization. In its first 100 years, API has developed more than 700 standards to enhance operational and environmental safety, efficiency and sustainability.

Editor's note: Updated Jan. 22, 2020.

Headquarters Address

200 Massachusetts Avenue NW
Washington, DC 20001
United States

Main Phone Number


The American Petroleum Institute (API) recently updated its safety standard for measuring annular casing pressure at offshore energy…

The American Petroleum Institute (API) has published the 5th Edition of API Recommended Practice (RP) 751 to assist…

RP 754 was designed to identify leading and lagging process safety indicators useful for driving operational safety and system…

The new guidelines released by API will provide standardization for individual oil and gas companies to report and track greenhouse-…

API has published a new edition for the measurement of LNG shipments aboard marine gas carriers, Manual of Petroleum Measurement…


The API Monogram program is a globally recognized success story, with a proven track record of acknowledging natural gas and oil equipment manufacturers that meet API’s best-in-class safety and sustainability standards.

Advancing Safety Through API’s Process Safety Site Assessment Program (PSSAP®)

API’s Center for Offshore Safety Promotes a Culture of Safety on the Outer-Continental Shelf.

API’s newly launched Pipeline Safety Management System Assessment Program drives safety and performance improvements for the pipeline industry.