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1. Seamless pipes for structures (GB / t8162-2008) are seamless pipes for general structures and mechanical structures.
2. Seamless pipe for fluid transportation (GB / t8163-2008) is a general seamless pipe used to transport water, oil, gas and other fluids.
3. Seamless tubes for low and medium pressure boilers (gb3087-2008) are high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless tubes for manufacturing superheated steam tubes, boiling water tubes for low and medium pressure boilers of various structures and superheated steam tubes, large smoke tubes, small smoke tubes and arch brick tubes for locomotive boilers.
4. Seamless tubes for high-pressure boilers (GB5310-2008) are high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless tubes for the heating surface of water tube boilers with high pressure and above.
5. High pressure seamless pipe for chemical fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel seamless pipe suitable for chemical equipment and pipeline with working temperature of - 40 ~ 400 ℃ and working pressure of 10 ~ 30mA.
6. Seamless tubes for petroleum cracking (GB9948-2006) are seamless tubes for furnace tubes, heat exchangers and pipelines in petroleum refineries.
7. The steel pipe for geological drilling (yb235-70) is the steel pipe used by the geological department for core drilling. According to the purpose, it can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe.
8. Seamless pipe for diamond core drilling (gb3423-82) is a seamless pipe for drill pipe, rock core rod and casing used for diamond core drilling.
9. Oil drilling pipe (yb528-65) is a seamless pipe used for internal or external thickening at both ends of oil drilling.
10. Marine carbon steel seamless pipe (gb5312-85)

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