Specification for Wellhead and Christmas Tree Equipment, Errata
Amendment by American Petroleum Institute, 04/25/2005

Specification for Wellhead and Christmas Tree Equipment, Errata
Amendment by American Petroleum Institute, 06/01/2006

Errata 5 for Specification for Wellhead and Christmas Tree Equipment
Amendment by American Petroleum Institute, 05/01/2009

Errata / Addenda for Specification of Nickel Base Alloy 718 (UNS N07718) for Oil and Gas Drilling and Production Equipment
Amendment by American Petroleum Institute, 03/31/2006

Supplement 2 & Errata – Specification for Pipeline Valves (Gate, Plug, Ball and Check Valves)
standard by American Petroleum Institute, 12/01/1998

Errata for Specification for Fire Test for Valves
Amendment by American Petroleum Institute, 12/01/2006

Errata for Specification for Fire Test for Valves
Amendment by American Petroleum Institute, 12/01/2008

Errata / Supplement for Fire Test for End Connections
Amendment by American Petroleum Institute, 12/01/2006

Errata for Fire Test for End Connections
Amendment by American Petroleum Institute, 12/01/2008