Ss Flange, CS Flange, Nickel Alloy Forged manufacturer / supplier in China, offering ASTM A182 F321 Flange Weld Neck Flat Face (FF) Ring Joint (RTJ) Raised Face (RF) Flanges Wn So Bl Thread Flange, Rtj Carbon Steel Flanged Pipet Flange Olet ASME B16.9 /B16.47 ASTM A105/A403 Forged Stainless Class 150 Flangeolet, High Pressure Forged Steel 1.4301 (X5CrNi1810) 1.4306 (X2CrNi1911) Forged Coupling for Hydraulic Oil Tank and so on.