... :Butt Weld & Socket Weld & Thread 3)Standard:ASME,ANSI,BS,DIN,JIS,etc. 4)ISO 9001:2008 SO(Slip On) flange ... 1500, CLASS 2500European Series: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400Flange Face TypesRaised Face(RF ... (T&G),Male-and-Female (M&F)StandardASME,ANSI,BS,DIN,JIS,etc.Surface Treatment Transparent oil, rust-proof black oil ...