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: 09/01/2008

Technical Report on Capabilities of API Flanges Under Combinations of Load, Third Edition, Includes Errata (March 2017)

Published Date: 02/01/1992

Testing of Oilfield Elastomers (A Tutorial)

Published Date: 03/01/2023

Heat Treatment and Testing of Carbon, Micro-alloyed, and Low-alloy Steel Wrought and Cast Components, Third Edition

Published Date: 04/30/2001

IEEE Recommended Practice - General Principles for Temperature Limits in the Rating of Electrical Equipment and for the Evaluation of Electrical Insulation

Published Date: 10/13/1988

IEEE Standard for an 8-Bit Backplane Interface: STEbus

Published Date: 04/03/1989

IEEE Guide for Interfacing Dispersed Storage and Generation Facilities with Electric Utility Systems

Published Date: 11/30/1994

IEEE Guide to the POSIX Open System Environment (OSE)

Published Date: 05/07/2003

IEEE Standard for Information Technology -- Portable Operating System Interface (POSIX(TM)) -- Technical Corrigendum 1

Published Date: 04/02/2004

IEEE Standard for Information Technology - Portable Operating System Interface (POSIX(TM)) - Technical Corrigendum 2