1)Size:1/2"-48" 2)Connection:Butt Weld & Socket Weld & Thread 3)Standard:ASME,ANSI,BS,DIN,JIS,etc. 4)ISO 9001:2008 SO(Slip ... on flanges are easy to use in fabricated applications.Size1/2"-48" DN15--DN3000MaterialCarbon steel, stainless steel and alloy steel( ... , F22, 15CrMo, 12CrMoV, Q235, 16Mn, 20# etc.)ConnectionButt Weld & Socket Weld & ThreadPressure American Series: CLASS 150, CLASS 300, CLASS 400 ...