1. Structural seamless pipe (GB/T8162-2008) is a seamless steel pipe used for general structure and mechanical structure.

2. Seamless steel pipe for fluid transportation (GB/T8163-2008) is a general seamless steel pipe used to transport water, oil, gas and other fluids.

3. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are high-quality carbon structural steel heat pipes used in the manufacture of superheated steam pipes and boiling water pipes for low and medium pressure boilers of various structures, as well as superheated steam pipes and arch brick pipes for locomotive boilers. Rolled and cold drawn (rolled) seamless steel tubes.

4. Seamless steel pipes for high-pressure boilers (GB5310-2008) are high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless steel pipes for the heating surface of water-tube boilers with high pressure and above.

5. High-pressure seamless steel pipes for fertilizer equipment (GB6479-2000) are high-quality carbon structural steel and alloy steel seamless steel pipes suitable for chemical equipment and pipelines with a working temperature of -40~400℃ and a working pressure of 10~30Ma.

6. ​​Seamless steel pipes for petroleum cracking (GB9948-2006) are seamless steel pipes suitable for furnace tubes, heat exchangers and pipelines in petroleum refineries.

7. Steel pipes for geological drilling (YB235-70) are steel pipes used for core drilling by geological departments. They can be divided into drill pipes, drill collars, core pipes, casing pipes and sedimentation pipes according to their purposes.

8. Seamless steel pipes for diamond core drilling (GB3423-82) are seamless steel pipes for drill pipes, core rods, and casings used for diamond core drilling.

9. Petroleum drilling pipe (YB528-65) is a seamless steel pipe with inner or outer thickening at both ends of oil drilling. Steel pipes are divided into two types: wire and non-wired. Wired pipes are connected by joints, and non-wired pipes are connected with tool joints by butt welding.

10. Carbon steel seamless steel pipes for ships (GB5213-85) are carbon steel seamless steel pipes used in the manufacture of Class I pressure piping systems, Class II pressure piping systems, boilers and superheaters. The working temperature of carbon steel seamless steel pipe wall does not exceed 450℃, while that of alloy steel seamless steel pipe wall exceeds 450℃.

11. Seamless steel pipes for automobile axle sleeves (GB3088-82) are high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipes used in the manufacture of automobile axle sleeves and drive axle axle tubes.

12. High-pressure oil pipes for diesel engines (GB3093-2002) are cold-drawn seamless steel pipes used to manufacture high-pressure pipes for diesel engine injection systems.

13. Precision inner diameter seamless steel pipes for hydraulic and pneumatic cylinders (GB8713-88) are cold drawn or cold-rolled precision seamless steel pipes with precise inner diameters for the manufacture of hydraulic and pneumatic cylinders.

14. Cold-drawn or cold-rolled precision seamless steel pipe (GB3639-2000) is a cold-drawn or cold-rolled precision seamless steel pipe for mechanical structure and hydraulic equipment with high dimensional accuracy and good surface finish. Choosing precision seamless steel pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining man-hours, increase material utilization, and at the same time help improve product quality.

15. Structural stainless steel seamless steel pipes (GB/T14975-2002) are hot-rolled stainless steel pipes and structural parts that are widely used in the chemical, petroleum, textile, medical, food, machinery and other industries. Extruded, expanded) and cold drawn (rolled) seamless steel tubes.

16. Stainless steel seamless steel tubes for fluid transportation (GB/T14976-2002) are hot-rolled (extruded, expanded) and cold-drawn (rolled) seamless steel tubes made of stainless steel for fluid transportation.

17. Special-shaped seamless steel pipe is a general term for seamless steel pipes with cross-sectional shapes other than round pipes. According to the different shape and size of the steel pipe section, it can be divided into equal-walled special-shaped seamless steel pipe (code D), unequal-walled special-shaped seamless steel pipe (code BD), and variable diameter special-shaped seamless steel pipe (code BJ). Special-shaped seamless steel pipes are widely used in various structural parts, tools and mechanical parts. Compared with round pipes, special-shaped pipes generally have larger moments of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce structural weight and save steel.

18. Seamless steel pipes for low-temperature pipelines (GB/T18984-2003) are suitable for -45℃～-195℃ low-temperature pressure vessel pipes and seamless steel pipes for low-temperature heat exchanger pipes.