Steel pipe fitting: Flange Standards: ANSI,API,BS,DIN,UNI,JIS and MSS SP Size:1/2"-64"(DN ... 15mm-1600mm) FlangeType:Slip-on,Welding Neck,Blind,Socket ... Welding,Threaded,Lap Jont and Plate etc.Pressure rating:: Class 150 ... PN10,PN25,PN40,PN64Materials: Carbon steel ,Stainless steel and Alloy steel etc.Standards: ANSI,API,BS,DIN, ...