Incorporated standard

API Spec 6D

API Specification 6D, Specification for Valves, 25th edition, November 1, 2021, including Errata (December 2021), Errata 2 (April 2022), Errata 3 (October 2023), Addendum 1 (April 2023), Addendum 2 (September 2024), and Addendum 3 (March 2025), (API Spec 6D); IBR approved for § 192.145(a).