api5000Specialized API 6A Flanges Manufacturer, API 6A 6B And 6BX Flanges, American Petroleum Institute Standards. We are exporting Api 6a Flanges, API Adapter Flanges,API 6A Type 6B 5000 PSI Weld Neck Flanges are generally used in hh pressure applications, where hot or cold temperatures exist. These steel API 6A weld neck flanges