API 653 Current Edition 2026: Standard vs BoK Window
API 653 is still 5th Edition (Nov 2014) + addenda — the 2026 refers to the BoK exam window. Edition timeline, BoK changes, exam implications. Updated May 2026.
API 653 is still 5th Edition (Nov 2014) + addenda — the 2026 refers to the BoK exam window. Edition timeline, BoK changes, exam implications. Updated May 2026.