... : carbon steel flange &forged flanges2)Materials : ASTM A105,DIN ST37.2, ASTM A182- F304 F304L, F316,F316L,F321 ,ASTM A350 ,ASTM A181, Q235, 20#, 20Mn ... , JG, BS.8)All the flanges are according to the ASTM, BS, DIN, JIS, EN, GB and customer's request.Ding ...