1)Size:1/2"-48" 2)Connection:Butt Weld & Socket Weld & Thread 3) ... , 20# etc.)ConnectionButt Weld & Socket Weld & ThreadPressure American Series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500 ... ,China Factory Certificate Test Equipment Production Equipment For sale PN 1.0 slip on carbon steel flange