Introduction to Seamless Steel Pipe Standards

1. Structural seamless pipes (GB/T8162-2008) are used for general structural and mechanical purposes.

2. Fluid transport seamless steel pipes (GB/T8163-2008) are for transporting water, oil, gas, and other fluids.

3. Low and medium pressure boiler seamless steel pipes (GB3087-2008) are used for manufacturing various low and medium pressure boiler superheated steam pipes, boiling water pipes, and locomotive boiler superheated steam and arch brick pipes.

4. High-pressure boiler seamless steel pipes (GB5310-2008) are for manufacturing carbon steel, alloy steel, and stainless heat-resistant steel seamless pipes for high-pressure water-tube boiler heating surfaces.

5. High-pressure seamless steel pipes for fertilizer equipment (GB6479-2000) are suitable for chemical equipment and pipelines operating at temperatures of -40~400°C and pressures of 10~30 MPa.

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

7. Steel pipes for geological drilling (YB235-70) are used for core drilling in geological departments, including drill pipes, drill collars, core barrels, casings, and settling pipes.

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

9. Oil drilling pipes (YB528-65) are seamless steel pipes with internally or externally thickened ends for oil drilling.

10. Carbon steel seamless pipes for shipbuilding (GB5213-85) are used for manufacturing Class I and II pressure piping systems, boilers, and superheaters in ships.

11. Seamless steel pipes for automobile half-shaft sleeves (GB3088-82) are used for manufacturing automobile half-shaft sleeves and drive axle housing tubes.

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

13. Seamless steel pipes with inner diameter for hydraulic and pneumatic cylinders (GB8713-88) are cold-drawn or cold-rolled seamless steel pipes for hydraulic and pneumatic cylinders.

14. Cold-drawn or cold-rolled seamless steel pipes (GB3639-2000) are used for mechanical structures and hydraulic equipment requiring high dimensional accuracy and good surface finish.

15. Structural stainless steel seamless pipes (GB/T14975-2002) are widely used in chemical, petroleum, light textile, medical, food, and mechanical industries for corrosion-resistant piping, structural components, and parts.

16. Stainless steel seamless pipes for fluid transport (GB/T14976-2002) are used for transporting fluids.

17. Shaped seamless steel pipes refer to non-circular cross-section seamless steel pipes, including equal wall thickness (D), unequal wall thickness (BD), and variable diameter (BJ) types.

18. Seamless steel pipes for low-temperature pipelines (GB/T18984-2003) are suitable for low-temperature pressure vessel pipelines and heat exchanger pipelines operating at -45°C to -195°C.