... the reasonable prices,welcome to our company. Hebei Hongcheng Pipe Fitting Co.,LtdName: alloy steel flangeSpecifications: DN10---DN2000Thickness: sch 5s-----160Standard: GB, ANIS ... ,Cr5Mo,12Cr1SMoVK,10CrMo910,15CrMo,12Cr2Mo1,A335P22,St45.8,A10bB flange,alloy steel flange,pipe fitting