... :Slip-on,Welding Neck,Blind,Socket Welding,Threaded,Lap Jont and Plate etc.Pressure rating:: Class 150,300,600,900,1500 ... ratings: PN6,PN10,PN25,PN40,PN64Materials: Carbon steel ,Stainless steel and Alloy steel etc.Standards: ANSI,API,BS,DIN,UNI,JIS ...