Carbon Steel;Stainless Steel;Alloy Steel, Forged flange, casting flange 1.FlangeA ,Material:Carbon Steel(10#, 20#,A3,Q235A,20G,16Mn,ASTM A105,A181, A182, A350, A403 etc.);Stainless Steel(304 ,304L,316,316L etc.);Alloy Steel(16MnR,Cr5Mo,12Cr1MoV,10CrMo910,15CrMo,12Cr2Mo1,A335P22,St45.8/III, A10bB)B,Standard:<1> ANSI 150 300 400 600 LB<2> DIN DIN 5 10 16 25 40 BAR<3> JIS JIS 5K 10K 16K 20K 31K<4> ...