Compact Steel Gate Valves – Flanged, Threaded, Welding, and Extended-Body Ends
standard by American Petroleum Institute, 10/01/1998

Ductile Iron Gate Valves, Flanged Ends – WITHDRAWN, No Replacement
standard by American Petroleum Institute, 01/01/1981

Fire Test for Soft-Seated Quarter Turn Valves
standard by American Petroleum Institute, 05/01/1993

Butterfly Valves: Lug- and Wafer-Type
standard by American Petroleum Institute, 05/01/1997

Centrifugal Pumps for General Refinery Service
standard by American Petroleum Institute, 06/01/1995

General-Purpose Steam Turbines for Petroleum, Chemical and Gas Industry Services
standard by American Petroleum Institute, 06/01/1997

API Standard 612, Petroleum, Petrochemical and Natural Gas Industries – Steam Turbines – Special-purpose Applications, Fifth Edition
standard by American Petroleum Institute, 04/01/2003

Special-Purpose Steam Turbines for Petroleum, Chemical, and Gas Industry Services
standard by American Petroleum Institute, 06/01/1995

Special Purpose Gear Units for Refinery Service, Chemical and Gas Industry Services
standard by American Petroleum Institute, 06/01/1995