... , BS, AS.JIS Weld NeckProduction size(NPS):10~6000mmType:Slip-On, Welding Neck flange, Blind flange, Socket Welding flange, Threaded ... flange,industrial flange,Carbon steel flanges)JIS B 2220Weld neckflange standard, JIS B 2220-2004(Steel pipe flanges Use:widely used ... in Petroleum, Chemical industry, Machinery, Electric power and so on pipe joint. Special design available we can offer all kinds ...