What are the materials of seamless steel pipe?

Seamless steel pipe is mainly used for petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural steel pipe for automobile, tractor and aviation.
1. Seamless steel pipe for structure (GB / T8162-2008) are seamless steel tubes 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 pipe for low and medium pressure boilers (GB3087-2008) are high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless steel tubes used to manufacture superheated steam pipes, boiling water pipes and superheated steam pipes and arch brick pipes for various structures of low and medium pressure boilers.
4. Seamless steel pipe for high pressure boiler (GB5310-2008) is a high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless steel tube used for the heating surface of water tube boiler with high pressure and above.
5. High pressure seamless steel pipe for fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel seamless steel pipe suitable for chemical equipment and pipeline with working temperature of - 40 ~ 400 ℃ and working pressure of 10 ~ 30 ma.
6. Seamless steel pipe for petroleum cracking (GB9948-2006) is a seamless steel tube for furnace tube, heat exchanger and pipeline of petroleum refinery.
7. The steel pipe for geological drilling (YB235-70) is a steel pipe for geological department to drill core. It can be divided into drill pipe, drill collar, core pipe, casing and settling pipe according to its use.
8. Seamless steel pipe for diamond core drilling (GB3423-82) is a seamless steel pipe for drill pipe, core rod and casing used for diamond core drilling.
9. Oil drilling pipe (YB528-65) is a seamless steel pipe used for internal or external thickening at both ends of oil drilling. The steel pipe is divided into two types: Turning wire and non turning wire. The turning wire pipe is connected with joint, and the non turning wire pipe is connected with tool joint by butt welding.
10. Carbon steel seamless steel pipe for ships (GB5213-85) is the carbon steel seamless steel pipe for manufacturing class I pressure pipe system, class II pressure pipe system, boiler and Superheater of ships. The working temperature of carbon steel seamless steel pipe wall shall not exceed 450 ℃, and that of alloy steel seamless steel pipe wall shall exceed 450 ℃.
11. Seamless steel pipe for automobile axle sleeve pipe (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe for automobile axle sleeve and driving axle shell pipe.
12. The high pressure oil pipe for diesel engine (GB3093-2002) is a cold drawn seamless steel pipe used to manufacture the high pressure pipe for the injection system of diesel engine. 13. Precision inner diameter seamless steel tube for hydraulic and pneumatic cylinder (GB8713-88) is a cold drawn or cold-rolled precision seamless steel tube with precise inner diameter for manufacturing hydraulic and pneumatic cylinder.
14. Cold drawn or cold-rolled precision seamless steel pipe (GB3639-2000) is a kind of cold drawn or cold-rolled precision seamless steel tube with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. Choosing precise seamless steel tube to manufacture mechanical structure or hydraulic equipment can greatly save machining time, improve material utilization rate and improve product quality.
15. Stainless steel seamless steel pipe for structural use (GB/T14975-2002) are hot-rolled (extruded, expanded) and cold drawn (rolled) seamless steel tubes made of stainless steel, which are widely used in chemical, petroleum, textile, medical, food, machinery and other industries as corrosion-resistant pipes, structural parts and components.
16. Stainless steel seamless steel pipe 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 the general term of seamless steel pipe with other cross-section shapes except for circular pipe. According to the different shapes and sizes of steel pipes, they can be divided into equal wall thickness special-shaped seamless steel pipes (code D), unequal wall thickness special-shaped seamless steel pipes (code BD), variable diameter special-shaped seamless steel pipes (code BJ). The special-shaped seamless steel pipe is widely used in various structural parts, tools and mechanical parts. Compared with the round pipe, the special-shaped pipe has larger inertia moment and section modulus, larger bending and torsion resistance, which can greatly reduce the structure weight and save steel.
18. Seamless steel pipe for low temperature pipeline (GB/T18984-2003) is applicable to low temperature pressure vessel pipeline of -45 ℃～ -195 ℃ and low temperature heat exchanger pipeline.