1)Size:1/2"-48" 2)Connection:Butt Weld & Socket Weld & Thread 3)Standard:ASME,ANSI,BS,DIN,JIS,etc. 4) ... flanges are easy to use in fabricated applications.Size1/2"-48" DN15--DN3000MaterialCarbon steel, stainless steel and alloy ... 600, CLASS 900, CLASS 1500, CLASS 2500European Series: PN 2.5, PN 6, PN 10, PN 16, PN 25 ... ,China Factory Certificate Test Equipment Production Equipment astm a403 flange