API 6A flanges are flanges that are designed to meet the specifications of the American Petroleum Institute (API) Standard 6A. API 6A flanges are used in a variety of applications, including oil and gas pipelines, refineries, and chemical plants.

API 6A flanges are RTJ flanges that are made under the API 6A standards. S.K. Forgefit is a manufacturer and supplier of the API 6a Various types Flanges. The 6A flanges have different specifications based on the pressure capacities.