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