API 10B Addendum 1 Addendum 1 - Recommended Practice for Testing Well Cements Amendment by American Petroleum Institute, 10/01/1999
API 653-Addendum 4 Tank Inspection, Repair, Alteration, and Reconstruction, Addendum 4 Amendment by American Petroleum Institute, 12/01/1999
API 5C3 Supplement 1 Bulletin on Formulas and Calculations for Casing, Tubing, Drill Pipe, and Line Pipe Properties Amendment by American Petroleum Institute, 04/15/1999
API 521 Errata 1 Errata 1 - Guide for Pressure-Relieving and Depressuring Systems standard by American Petroleum Institute, 02/15/1999
API 6D Errata Supplement 2 & Errata - Specification for Pipeline Valves (Gate, Plug, Ball and Check Valves) standard by American Petroleum Institute, 12/01/1998
API 10A Addendum 1 Addendum 1 - Specification for Cements and Materials for Well Cementing Amendment by American Petroleum Institute, 04/01/2000
API 13B2 Supplement 1 Supplement 1 - Recommended Practice Standard Procedure for Field Testing Oil-Based Drilling Fluids Amendment by American Petroleum Institute, 05/31/2000
API 7K Addendum 1 Addendum 1 for Specification for Drilling and Well Servicing Equipment, Fourth Edition Amendment by American Petroleum Institute, 02/01/2006
API 7L Addendum 1 Addendum 1 for Procedures for Inspection, Maintenance, Repair, and Remanufacture of Drilling Equipment, 1st Edition Amendment by American Petroleum Institute, 02/01/2006
API 10B Addendum 2 Addendum 2 - Recommended Practice for Testing Well Cements Amendment by American Petroleum Institute, 11/01/2000
API 13B1 Addendum 1 Addendum 1 - Recommended Practice Standard Procedure for Field Testing Water-Based Drilling Fluids Amendment by American Petroleum Institute, 05/31/2000
API 6A718 Errata / Addenda Errata / Addenda for Specification of Nickel Base Alloy 718 (UNS N07718) for Oil and Gas Drilling and Production Equipment Amendment by American Petroleum Institute, 03/31/2006