... ,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe(API5D,APISEPC7,API5CT) of 2-3 ... beam quenching furnace,, hot and cold straighten device, friction welding machine, middle frequency heat treatment, numerical control lathe and compete set ... /2” of label 1 or 60.32mm to 139.7mm3) Wall thickness:6.45 to 12.7mm4) Grade:E75,X95,G105 ...