| API 6A. Fits flanges API 6A type 6X | Special shape with pressure balance bore | BX | No | BX | 2000.0 | Subsea applications | |
| ASME B16.20, API 6A. Fits flanges ASME B16.5/16.47/API/MSS SP44/BS1560 | Standard shape. Developed for high pressure applications | R OCTAGONAL | Yes | R OCTAGONAL | 400.0 | Offshore oil and gas,Petrochemical industry | |
| ASME B16.20, API 6A. Fits flanges ASME B16.5/16.47/API/MSS SP44/BS1560 | Standard shape. Developed for high pressure applications | R OVAL | Yes | R OVAL | 400.0 | Offshore oil and gas,Petrochemical industry | |
| Fits flanges ASME B16.5/16.47/API/MSS SP44/BS1560 | Asymmetrical shape, self energizing | RX | Yes | RX | 550.0 | Subsea applications | |
