9. Oil drilling pipe (YB528-65) is used for oil drilling within the thickening or external upset ends of seamless steel tubes. Minute drive wire and steel wire are not two kinds of vehicles, vehicle wire connector useful links, not threading methods and tools useful butt joint connection.

10. The ship carbon steel seamless pipe (GB5213-85) is the manufacture of pressure vessels piping Class I, Ⅱ grade pressure piping, boilers and Super heater carbon steel seamless steel tubes. Carbon steel seamless pipe wall temperature does not exceed 450 ℃, alloy steel seamless pipe wall temperature exceeds 450 ℃.

11. Automobile axle casing of stainless steel seamless pipe (GB3088-82) is the manufacture of automobile axle casing and drive shaft axle housing of high quality carbon steel pipes and alloy steel hot-rolled seamless steel tubes.

12. Diesel high pressure oil pipe (GB3093-2002) is to create high-pressure diesel injection system works in the cold drawn seamless steel tubes.