1)SO Flange 2)Standard:ASME/DIN/JIS/EN/BS 3)PN:6-64(1/2"-64 ... ,304L, F316,316L,1Cr18Ni9Ti,0Cr18Ni9Ti,321,18-8(Alloy Steel): ASTM A182 F1, F5a, F9, F11, F12, F22, F91,A182F12 ... Cr5Mo,12Cr1MoV,15CrMo,12Cr2Mo1,A335P22,St45.8/3StandardDIN,ANSI/ASME/ASTM,JIS,ISO,BS,ENSize11/2”-24”Thickness11.20-47. ... ,304L, F316,316L,1Cr18Ni9Ti,0Cr18Ni9Ti,321,18-8(Alloy Steel): ASTM A182 F1, F5a, F9, F11, F12, F22, F91,A182F12 ...