Seamless Steel Honed Tube: JIS STKM13C/ DIN ST52/ ASTM A106/ SAE1020 and Seamless Steel Welded Pipe: DIN ST52.3 are offered. Seamless Steel Honed Tube withstands higher pressure than welded tube without splits. But roundness of welded pipe is superior to Seamless Steel Honed Tube. After honing, carbon steel pipe of mechanical structure use has precision diameter, smooth surface and excellent performance in oil storage. It can stand longer and work smoothly without pausing. It also applies to hydraulic cylinders tube, pneumatic cylinders tube, forklift, crane, excavator, punching machine and other kinds of labor-saving automatic mechanical engineering.