Forged Carbon Steel Flange 1. Gost12820-80 and Gost12821-80 2. ... and Gost12821-80 Forged Carbon Steel Flange 1. Standards:ANSI,JIS,DIN,BS4504,SABS1123,EN1092-1, UNI,AS2129,GOST-128202 ... ,Socket weld,Blind3. Size:1/2-78 inch (DN15-DN2000)4. Material:Carbon steel: A105,SS400,SF440 ... Capacity:12,000/year Gost12820 and Gost12821-80 Forged Carbon Steel FlangeMaterial: Q235 16MnPayment Terms: 15% prepayment ...