Carbon steel flange with different variaties Size: from 1/2"to 80" DN15 TO DN2000 Materials: carbon steel or stainless st Name: carbon steel flangeSize: from 1/2" to 80"( dn15 to dn2000) Materials: carbon steel or stainless steelASTM A105, SS400,ST37.2, ST35.3, ASTM A182 F304/304L/316/316L/321 and so on Facing method: rust preventing oil, spray paint (black, yellow), hot galvanization, Electric ...