China BS Standard Ball Valve: BS 5351 Trunnion Mounted Ball Valves, Forged Steel, Alloy Steel, F304, F316, F321, 150LB-2500LB, Side Entry, Top Entry ... Safe Design. Specifications: Design: ASME B16.34/BS 5351/API 6D. Face to Face: ASME B16.10. End to ... ASME B16.5. BW End: ASME B16.25. Test: API 598. Special: NACE MR-01-75. Pressure: Class 150LB- ... , F22, F304, F304L, F316, F316L, F321, F51, Alloy Steel.