api500010,000 PSI - Type 6BX API 6A - Table E.4 . Nominal size of Flange: Maximum Bore: Outside Diameter of Flange: Max. ChamferAPI 6A - TYPE - 6B 34.5 MPA (5000 PSI) Size B OD C (MAX.) K P E T Q X BC N H LN HL JL Ring Number R or RX 2 116˝ 53.2 215 3 124 95.25 7.9 46.1 38.1 104.8 165.1 8 26 109.5 60.3