... Flange RF,12",300#,ASTM A105/ANSI B16.5 1.Standard:ANSI, DIN,JIS, BS 2.carbon/stainless/alloy/Aluminum steel Description of Flange: Production NameSO Flange RF,ANSI ... B16.5,UNIT WEI1GHT:5KG12",300#,ASTM A105/ Size1/4''-48'',DN8-DN1200WTSCH5S-XXSStandardANSI B16.9, ANSI B16.28, DIN , ISO, EN,JIS ... raised faced flange,weld neck flange, slip on flange , plate flange , Threaded flange, blind ...