American Petroleum Institute

American Petroleum Institute (API)

API About - The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Our more than 650 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry. They are producers, refiners, suppliers, pipeline operators and marine transporters, as well as service and supply companies that support all segments of the industry.

Standards

Exploration & Production

Petroleum Measurement

Marketing

Transportation

Refining

Safety and Fire Protection

Health and Environmental Issues

API Data Products

Policy and Economic Studies

Communications and Education Outreach

Historical Publications

Translated Publications

 

Display #
Title
API Spec 12B - Bolted Tanks for Storage (in)
API Standards List
API Std 600 - Trim Number Chart
API Std 650 - Flanged Roof Nozzles (in)
API Std 650 - Flanged Roof Nozzles (mm)
API Std 650 - Flush-type Shell Connection (in)
API Std 650 - Flush-type Shell Connection (mm)
API Std 650 - Roof Manholes (in)
API Std 650 - Roof Manholes (mm)
API Std 650 - Shell Nozzle Welding Schedule (in)
API Std 650 - Shell Nozzle Welding Schedule (mm)
API Std 650 - Shell Nozzles (in)
API Std 650 - Shell Nozzles (mm)
API Std 650 - Threaded Roof Nozzles (in)
API Std 650 - Threaded Roof Nozzles (mm)