What is the standard of seamless steel pipe?

1. GB/T8162-1999 (seamless steel pipe for structural use). Mainly used for general structure and mechanical structure. Its representative material (grade): carbon steel 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.

2. GB/T8163-1999 (Seamless steel pipes for fluid transportation). Mainly used in engineering and large-scale equipment pipelines for transporting fluids. Representative materials (grades) are 20, Q345, etc.

3. GB3087-1999 (seamless steel pipes for low and medium pressure boilers). It is mainly used in pipelines for conveying low and medium pressure fluids in industrial boilers and civil boilers. Representative materials are No. 10 and No. 20 steel.

4. GB5310-1995 (seamless steel pipes for high pressure boilers). Mainly used in high temperature and high pressure fluid main pipes and pipelines in power plants and nuclear power plants. Representative materials include 20G, 12Cr1MoVG, 15CrMoG, etc.

5. GB5312-1999 (carbon steel and carbon-manganese steel seamless steel pipes for ships). It is mainly used for Class I and Class II pressure tubes of marine boilers and superheaters. The representative materials are 360, 410, 460 steel and so on.

6. GB1479-2000 (seamless steel pipes for high-pressure fertilization equipment). It is mainly used for pipelines transporting high-temperature and high-pressure fluids on chemical fertilizer equipment. Representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo and so on.

7. GB9948-1988 (seamless steel pipes for petroleum cracking). It is mainly used in boilers, heat exchangers and fluid pipelines in petroleum refineries. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb and so on.

8. GB18248-2000 (seamless steel pipes for gas cylinders). It is mainly used in the manufacture of various gas cylinders and hydraulic cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo and so on.

9. GB/T17396-1998 (hot-rolled seamless steel pipes for hydraulic props). It is mainly used in the manufacture of coal mine hydraulic supports, cylinders and columns, as well as other hydraulic cylinders and columns. Its representative materials are 20, 45, 27SiMn and so on.

10. GB3093-1986 (high pressure seamless steel pipe for diesel engine). It is mainly used for high-pressure oil pipes of diesel engine injection systems. The steel pipe is generally cold drawn, and its representative material is 20A.

11. GB/T3639-1983 (cold-drawn or cold-rolled precision seamless steel tubes). It is mainly used for steel pipes for mechanical structures and carbon pressure equipment, requiring high dimensional accuracy and good surface finish. Its representative materials are 20, 45 steel and so on.

12. GB/T3094-1986 (cold-drawn seamless steel pipe and special-shaped steel pipe). It is mainly used to manufacture various structural parts and parts, and its materials are high-quality carbon structural steel and low-alloy structural steel.

13. GB/T8713-1988 (Precision inner diameter seamless steel tubes for hydraulic and pneumatic cylinders). It is mainly used to manufacture cold-drawn or cold-rolled seamless steel pipes with precise inner diameters for hydraulic and pneumatic cylinders. Its representative materials are 20, 45 steel and so on.

14. GB3093-1986 (high pressure seamless steel pipe for diesel engine). It is mainly used for high-pressure oil pipes of diesel engine injection systems. The steel pipe is generally cold drawn, and its representative material is 20A.

15. GB/T3639-1983 (cold drawn or cold rolled precision seamless steel tubes). It is mainly used for steel pipes for mechanical structures and carbon pressure equipment, requiring high dimensional accuracy and good surface finish. Its representative materials are 20, 45 steel and so on.

16. GB/T3094-1986 (cold-drawn seamless steel pipe and special-shaped steel pipe). It is mainly used to manufacture various structural parts and parts, and its materials are high-quality carbon structural steel and low-alloy structural steel.

17. GB/T8713-1988 (Precision inner diameter seamless steel tubes for hydraulic and pneumatic cylinders). It is mainly used to manufacture cold-drawn or cold-rolled seamless steel pipes with precise inner diameters for hydraulic and pneumatic cylinders. Its representative materials are 20, 45 steel and so on.

18. GB13296-1991 (stainless steel seamless steel pipes for boilers and heat exchangers). It is mainly used in boilers, superheaters, heat exchangers, condensers, catalytic tubes, etc. of chemical enterprises. High temperature, high pressure, corrosion-resistant steel pipes are used. Its representative materials are 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and so on.

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