... .)ConnectionButt Weld & Socket Weld & ThreadPressure American Series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500European Series: PN 2.5, PN 6 ... 400Flange Face TypesRaised Face(RF),Flat Face (FF),Ring-Type Joint (RTJ),Ring Type Joint gaskets,Tongue-and-Groove (T&G),Male ... Province,China Factory Certificate Test Equipment Production Equipment flange 1500 class