api5000API 6A - TYPE - 6BX 34.5 MPA (5000 PSI) Size OD C E1 G K T J1 J4 R BC N H Ring Number BX 13 58˝ 675 6 14.3 408.00 457 112.8 481.0 23.9 16 590.60 16 45Surface, Underwater Safety, and Boarding Shutdown Valves Background Products covered by API 6A include surface safety valves (SSV), underwater safety valves