What are the implementation standards and application scope of stainless steel seamless pipes?

1. GB/T8162-1999 (Seamless steel pipes for structural use). Mainly used for general and mechanical structures. Representative materials (grades): carbon steel, 20 and 45 steel; Alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.

　　2. GB/T8163-1999 (Seamless steel pipes for conveying fluids). Mainly used for transporting fluid pipelines on engineering and large equipment. The representative materials (grades) are 20, Q345, etc.

　　3. GB3087-1999 (Seamless Steel Tubes for Low and Medium Pressure Boilers) is a high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless steel tube used for manufacturing various structures of superheated steam tubes, boiling water tubes, superheated steam tubes, large smoke tubes, small smoke tubes, and arch brick tubes for low and medium pressure boilers and locomotive boilers. The representative materials are 10 and 20 steel.

　　4. GB5310-1995 (Seamless Steel Tubes for High Pressure Boilers) is a high-quality carbon steel, alloy steel, and stainless heat-resistant seamless steel tube used for manufacturing the heating surface of water tube boilers with high pressure and above. Representative materials include 20G, 12Cr1MoVG, 15CrMoG, etc.

　　5. GB1479-2000 (Seamless Steel Tubes for High Pressure Fertilizer Equipment) is a high-quality carbon structural steel and alloy steel seamless steel tube suitable for chemical equipment and pipelines with a working temperature of -40~400 ℃ and a working pressure of 10~30Ma. Representative materials include 20, 16Mn, 12CrMo, 12Cr2Mo, etc.

　　6. GB9948-1988 (Seamless Steel Tubes for Petroleum Cracking). Mainly used for boilers, heat exchangers, and fluid pipelines in petroleum refineries. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.

　　7. Geological drilling steel pipe (YB235-70) is a steel pipe used by geological departments for core drilling. It can be divided into drill rods, drill collars, core pipes, casings, and sedimentation pipes according to its purpose.

　　8. Seamless steel pipe for diamond core drilling (GB3423-82) is a seamless steel pipe used for drill rods, core rods, and casing in diamond core drilling.

　　9. Oil drilling pipe (YB528-65) is a seamless steel pipe used for oil drilling with inner or outer thickening at both ends. Steel pipes are divided into two types: threaded and non threaded. Threaded pipes are connected with joints, while non threaded pipes are connected with tool joints by butt welding.

　　10. GB5312-1999 (Seamless Carbon Steel and Carbon Manganese Steel Tubes for Ships) is a carbon steel seamless steel tube used for manufacturing Class I pressure resistant piping systems, Class II pressure resistant piping systems, boilers, and superheaters for ships. The working temperature of carbon steel seamless steel pipe wall shall not exceed 450 ℃, and the working temperature of alloy steel seamless steel pipe wall shall exceed 450 ℃. The representative materials are 360, 410, 460 steel grades, etc.

　　11. Seamless steel pipes for automotive half shaft sleeves (GB3088-82) are high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipes used for manufacturing automotive half shaft sleeves and drive axle housing shaft sleeves.

　　12. High pressure fuel pipes for diesel engines (GB3093-86) are cold drawn seamless steel pipes used to manufacture high-pressure pipes for diesel injection systems.

　　13. Precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinder tubes (GB8713-88) is a cold drawn or cold-rolled precision seamless steel pipe with precise inner diameter dimensions used for manufacturing hydraulic and pneumatic cylinder tubes.

　　14. Cold drawn or cold-rolled precision seamless steel pipes (GB3639-83) are used for mechanical structures and hydraulic equipment with high dimensional accuracy and good surface smoothness. Choosing precision seamless steel pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and also contribute to improving product quality.

　　15. Stainless steel seamless steel pipes for structural use (GB/T14975-1994) are hot-rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipes made of stainless steel, widely used in industries such as chemical, petroleum, textile, medical, food, and machinery for corrosion-resistant pipelines, structural components, and parts.

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