... applications.Size1/2"-48" DN15--DN3000MaterialCarbon steel, stainless steel and alloy steel( A105,,F316, F304, F316L, F304L ... , F5, F11, F22, 15CrMo, 12CrMoV, Q235, 16Mn, 20# etc.)ConnectionButt Weld & Socket Weld & ThreadPressure American Series ... CLASS 600, CLASS 900, CLASS 1500, CLASS 2500European Series: PN 2.5, PN 6, PN 10, ... b 16.47 carbon steel forged flange