... ,B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe( ... 2,4",4-1/2",5",5-1/2",Steel Grade:E75, X95, G105, S135 Type of end finish: ... furnace,, hot and cold straighten device, friction welding machine, middle frequency heat treatment, numerical control lathe and compete set ... 139.7mm3) Wall thickness:6.45 to 12.7mm4) Grade:E75,X95,G105,S1355) Length:R1:6.1-7. ...