api 5000API 5k Flange API 5000 API 10k Flange API 10000 API 15k Flange API 15000 View API ring joint flange pressure rating, Ramesh Group produces class 3000 To 10000 in forging methods.API Specification 6A covers wellhead and tree equipment as follows: API Specification 6A Wellhead Equipment Valves, Chokes, and Actuators Plugs, Connectors, and Gaskets Other