... JIS ANSI 4.Certificate:GL BV DNV Forged Steel Flange:1.26 years exporting experience2.Specification:1/2"-40" ... 3.Flange Process:Forging Flange, Machining Flange, Cast Iron Flange4.Standard: DIN2533, DIN 2573, ... , WN, SW, Threaded, Lap Joint, Ring Joint.4.JPI Standard: SO, WN, SW, Threaded, Lap Joint, Ring Joint.5.Nonstandard FlangesThe certificate of ...