China Flat Flanges/ Loose Flanges Stainless Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, Nickel Alloy Flange, Find details about China ANSI B16.5 Flat Flange, DIN2576 Dn10-Dn500 from Flat Flanges/ Loose Flanges Stainless Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, Nickel Alloy Flange