... Connection:Butt Weld & Socket Weld & Thread 3)Standard:ASME,ANSI,BS,DIN,JIS,etc. 4)ISO 9001:2008 ... F304L, F5, F11, F22, 15CrMo, 12CrMoV, Q235, 16Mn, 20# etc.)ConnectionButt Weld & Socket Weld & ThreadPressure American Series: CLASS 150 ... Series: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, ... China Factory Certificate Test Equipment Production Equipment asme b 16.47 carbon steel forged flange