Specification for Valves

Twenty-Fifth Edition

Includes Errata 1 (2021), Errata 2 (2022), and Addendum 1 (2023)

Published by American Petroleum Institute, 11/01/2021


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API 6D, 25th Edition – Specification for Valves

API 6D defines the requirements for the design, manufacturing, materials, welding, quality control, assembly, testing, marking, documentation, and process controls of axial, ball, check, gate, and plug valves for application in the petroleum and natural gas industries.

This specification applies to ASME Class 150, 300, 600, 900, 1500, and 2500.

NOTE ASME Class 400 has been removed from this specification.

API 6DR for repair and remanufacture of valves has been withdrawn and has been replaced by Annex A.

Annexes A, B, D, E, F, J, and L are informative and contain optional requirements used in this specification.

Annexes C, G, H, I, and K are normative and are mandatory in the use of this specification.

Information marked “NOTE” are not requirements but are provided for guidance in understanding or clarifying the associated requirement.

General Product Information:

Revision 25th Edition
Document Type PDF
Pages 172
Document Language English
Publisher American Petroleum Institute (API)
Status Current


Document History