API Spec 6A PDF

Published Date: 10/31/2018

Specification for Wellhead and Tree Equipment, Twenty-First Edition, Includes Errata 1 (2019), Errata 2 (2020), Errata 3 (2020), Errata 4 (2021), Errata 5 (2024), Errata 6 (2024), Addendum 1 (2020), Addendum 2 (2021), Addendum 3 (2022), and Addendum 4 (2024)

Published Date: 10/01/2010

Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition (ISO 10423:2009 Modification), Includes Errata (through Errata 10, Aug 2016), Addenda 1(Nov 2011), 2 (Nov 2012), 3 (March 2013), and 4 (June 2016)

Published Date: 07/01/2004

Specification for Wellhead and Christmas Tree Equipment, Nineteenth Edition, Includes Erratas 1-5 (2009), Addendums 1, 2, 3, and 4 (2008)

Published Date: 05/01/2002

NOT AVAILABLE DUE TO SERIOUS TECHNICAL ERRORS IN DOCUMENT - Specification for Wellhead and Christmas Tree Equipment, 18th edition

Published Date: 11/01/1999

Specification for Wellhead and Christmas Tree Equipment, Seventeenth Edition

Published Date: 01/01/1986

Specification for Wellhead and Christmas Tree Equipment, 15th Edition

Published Date: 01/01/1983

Specification for Wellhead and Christmas Tree Equipment, Fourteenth Edition

Published Date: 01/01/1981

Specification for Wellhead and Christmas Tree Equipment, 13th Edition

Published Date: 01/01/1979

Specification for Wellhead and Christmas Tree Equipment, 12th Edition

Published Date: 10/01/1977

Specification for Wellhead and Christmas Tree Equipment, 11th Edition

Published Date: 05/31/1987

Bulletin on Round Thread Casing Joint Strength with Combined Internal Pressure and Bending

Published Date: 03/01/2005

2004 Survey on Petroleum Industry Occupational Injuries, Illnesses, and Fatalities Summary Report: Aggregate Data Only

Published Date: 08/01/2020

Systems and software engineering - Software life cycle processes - Part 2: Relation and mapping between ISO/IEC/IEEE 12207:2017 and ISO/IEC 12207:2008

Published Date: 08/01/2022

Software engineering - Software life cycle processes - Maintenance

Published Date: 08/01/2019

Systems and software engineering - Systems and software assurance - Part 1: Concepts and vocabulary

Published Date: 10/31/2022

Systems and software engineering - Systems and software assurance - Part 2: Assurance case

Published Date: 11/01/2023

Systems and software engineering - Systems and software assurance - Part 3: System integrity levels

Published Date: 08/01/2021

Systems and software engineering - Systems and software assurance - Part 4: Assurance in the life cycle