Forged Steel Ball Valve API Forged Steel Trunnion Type Ball Valve Main parts and materials : Parts name material Body Bonnet A150;A182-F316;A350-LF2 Stem A276-304;A276-316 Seat  A105+ENP;A182-F316;A350-LF2+ENP Ball A182-F304 1);A182-F306; Standards Design and Manufacture Face to face Flange end Inspection Fire durable API 6D,BS5351 ANSI B16.10 ASME B16.5 API 598/API 6D API607 Test pressure Test item Shell test Seal test Back  seal test Air seal test Medium(MPa) water(MPa)  Air (MPa) Pressure (class) 150 3.1 2.2 2.2 0.5~0.7 300 7.8 5.6 5.6 600 15.3 11.2 11.2 900 23.1 16.8 16.8 1500 38.4 28.1 28.1