SO Flange RF,12",300#,ASTM A105/ANSI ... carbon/stainless/alloy/Aluminum steel Description of Flange: Production NameSO Flange RF,ANSI B16.5,UNIT WEI1GHT:5KG12",300 ... s requirementMain Flangeblind raised faced flange,weld neck flange, slip on flange , plate flange , Threaded flange, blind flangeInspection Factory in ... our pursuit daisy(at)dingshengsteel.com SO Flange RF,ANSI B16.5,UNIT WEI1GHT:5KG12",300#,ASTM ...