API provides free downloads for updates, including Addendum 4 (November 2024) and Errata 6 (October 2024) , on the API Monogram website . 🛠️ Key Changes in the 21st Edition
The is the current global standard for "Specification for Wellhead and Tree Equipment," establishing rigorous requirements for the design, manufacturing, and testing of oil and gas wellhead components. Accessing the Document
The (Specification for Wellhead and Tree Equipment) was published in November 2018 and became effective on November 1, 2019. This edition introduced major updates, including a complete document reorganization, revised sizing tables, and the mandatory use of API 20E and API 20F for bolting. Official Purchase and Access
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