Centrifugal Fans for Petroleum, Chemical and Gas Industry Services, Second Edition
standard by American Petroleum Institute, 10/01/2002

Positive Displacement Pumps – Reciprocating
standard by American Petroleum Institute, 06/01/1995

Positive Displacement Pumps – Reciprocating, Includes Errata (May 2014), Errata 2 (April 2015)
standard by American Petroleum Institute, 12/01/2010

Positive Displacement Pumps-Controlled Volume for Petroleum, Chemical, and Gas Industry Services, 3rd Edition, Includes Errata (June 2014)
standard by American Petroleum Institute, 11/01/2012

Positive Displacement Pumps – Rotary
standard by American Petroleum Institute, 12/01/1994

Positive Displacement Pumps-Rotary, Third Edition
standard by American Petroleum Institute, 11/01/2009

General-Purpose Gear Units for Petroleum, Chemical and Gas Industry Services, Third Edition
standard by American Petroleum Institute, 04/01/2006

Liquid Ring Vacuum Pumps and Compressors for Petroleum, Chemical, and Gas Industry Services, 1st Edition
standard by American Petroleum Institute, 02/01/1996

Pumps-Shaft Sealing Systems for Centrifugal and Rotary Pumps, Fourth Edition
standard by American Petroleum Institute, 05/01/2014

Pumps-Shaft Sealing Systems for Centrifugal and Rotary Pumps, Third Edition (Printed Edition Includes binder) (Includes Errata)
standard by American Petroleum Institute, 09/01/2004