... )Size:1/2"-48" 2)Connection:Butt Weld & Socket Weld & Thread 3)Standard:ASME,ANSI,BS,DIN,JIS,etc. 4)ISO ... , Q235, 16Mn, 20# etc.)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, PN 10, PN 16, PN ...