... 205 -208mm 4. Flanges Flanges Products include:Welded flange Welded flange,Loose flange , Stainless steel, flange Carbon steel Flange Real shooting flange Welded elbow Other Raised face (RF) Production ... ,F91,A182F12,A182F11,16MnR, Cr5Mo,12Cr1MoV,15CrMo,12Cr2Mo1, A335P22,St45. Flange applicable:standards Ministry of Chemical Industry HG20593-1997, GB GB ...