API Spec 7NRV (R2012)
Specification for Drill String Non-return Valves, First Edition, Includes Addendum 1 (2019)standard by American Petroleum Institute, 07/01/2006
Specification for Drill String Non-return Valves, First Edition, Includes Addendum 1 (2019)standard by American Petroleum Institute, 07/01/2006
Datasheets for API Std 685Data Sheet by American Petroleum Institute, 02/01/2011
Addendum 1 to Specification for Rotary Drill Stem Elements, First Edition -- Identical to ISO 10424-1:2004Amendment by American Petroleum Institute, 03/01/2007
Specification for Wellhead and Christmas Tree Equipment, 8th Editionstandard by American Petroleum Institute, 01/01/1971
Specification for Verification Test of Wellhead Surface Safety Valves and Underwater Safety Valves for Offshore Service(includes Errata dated December 1996)standard by American
Specification for Vertical and Horizontal Emulsion Treaters, Fifth Editionstandard by American Petroleum Institute, 10/01/2008
Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, Includes Errata 1 (2017)standard by American Petroleum Institute, 04/01/2017
Specification for Casing and Tubingstandard by American Petroleum Institute, 04/01/2002
Errata for Specifications for Pumping Units, Eighteenth EditionAmendment by American Petroleum Institute, 07/01/2009
Plate Heat Exchangers for General Refinery Services - Part 2 - Brazed Alumninum Plate-fin Heat Exchangers First Edition - ISO Adoption from