Seamless steel tube series

Seamless steel tube is a kind of hollow, no seams around a strip of steel. Seamless hollow sections, can be used as a transmission fluid pipe, such as oil, natural gas, coal gas, water, some solid material piping and so on. Seamless steel tubes and solid steel round bar compared to resistance to bending and torsional strength is the same as light in weight, is a kind of economic section steel, widely used in the manufacture of structural components and mechanical parts, such as drill, propeller shafts, bike racks and construction steel scaffolding used in the construction. Manufacture of seamless circular parts, can increase material utilization, simplifying the manufacturing process, saving material and processing time, such as Jack and bearing rings, has been widely used to make. Steel or a variety of indispensable materials of conventional arms, the barrel, the barrel must steel pipe manufacturing. Pipe cross sectional area can be divided into different shapes round tube and tube. Because the perimeter under equal conditions, the largest, with circular tube can deliver more fluid. In addition, the ring cross-section when subjected to internal or external pressure, force more evenly, so most of the steel pipe is the pipe. However, the tube has certain limitations, such as under plane bending conditions, the tube is not square and rectangular tube bending strength, some farm equipment frame, steel-wood furniture, square and rectangular tubes. There need to be other cross-section shapes according to different uses of shaped steel tube.

1. seamless steel tubes for structures (GB/T8162-2008) is a seamless steel pipe for general structure and mechanical structures.

2. seamless steel tubes for fluid transport (GB/T8163-2008) was used to carry water, oil, gas and other fluids generally seamless steel pipe.

3. low/middle-pressure boiler seamless steel pipe (GB3087-1999) is used in the manufacture of low and medium pressure boiler overheating

Steam pipes, tubes in boiling water and superheated steam locomotive boiler tubes, opium pipes, small pipes and arched brick pipe hot-rolled quality carbon structural steel and drawing (rolling) seamless steel pipe.

4. seamless steel tubes for high pressure boiler (GB5310-1995) is used in the manufacture of high pressure and the pressure of water-tube boiler heating surfaces using high quality carbon steel, alloy steel and stainless steel seamless steel tubes.

5. chemical fertilizer plants with high-pressure seamless steel pipe (GB6479-2000) is suitable for working temperature is-40~400℃, the working pressure is 10~30Ma chemical equipment and pipeline of high quality carbon steel and alloy steel seamless steel pipe.

6. seamless steel tubes for petroleum cracking (GB9948-88) is applied to oil refinery furnace tubes, heat exchangers and pipe seamless steel pipe.

7. geological drilling pipe (YB235-70) is used for core drilling by the Geological Department of steel pipes, can be classified by use of the drill pipe, drill collars, core pipe, casing, and settling tube.

8. seamless steel tubes for diamond core drilling (GB3423-82) is used for diamond core drilling pipe, the core rod, seamless steel casing.

9. oil-drilling pipe (YB528-65) is used for oil drilling ends within the thickened or plus the thickness of seamless steel tubes. Pipe threading and threading not two, threading pipe joint connections, not thread pipe butt welding method and tool joint connection.

10. ship carbon steel seamless pipe (GB5213-85) is to manufacture the ship I-level pressure piping, ⅱ class pressure piping, boiler and superheater of carbon steel seamless steel tubes. Carbon steel seamless pipe wall temperature does not exceed 450 ℃, the temperature over 450 ° c alloy seamless steel pipe wall.

11. seamless steel tube for automobile axle (GB3088-82) was manufactured car axle and driven bridge shell axis effective quality carbon structural steel and hot-rolled structural alloy steel seamless steel pipe.

12. the diesel used high-pressure tubing (GB3093-2002) is a cold-drawn seamless steel tubes for high pressure pipe manufacture diesel injection systems.

13. precision hydraulic and pneumatic cylinder diameter seamless pipe (GB8713-88) is a manufacturer of hydraulic and pneumatic cylinder with precision for dimension of inner diameter of cold-drawn or cold-rolled precision seamless steel tubes.

14. cold-drawn or cold-rolled precision seamless steel tube (GB3639-2000) is used for mechanical structures, hydraulic equipment, high precision and good surface finish of cold-drawn or cold-rolled precision seamless steel tubes.

15. structure of stainless steel seamless pipe (GB/T14975-2002) is widely used in chemical, petrochemical, textile, medical, food, machinery and other industrial corrosion of piping and structural parts and components made of stainless steel and hot-rolled (squeeze, expansion) and drawing (rolling) seamless steel pipe.

16. the fluid transport stainless steel seamless pipe (GB/T14976-2002) is used for conveying fluids made of stainless steel and hot-rolled (squeeze, expansion) and drawing (rolling) seamless steel pipe.

17. shaped seamless steel pipe is in addition to tube section other than of seamless steel tubes in General. Steel of different shape and size can be divided into equal thickness shaped seamless steel pipe (code d) and different shaped seamless steel pipe wall thickness (code-named BD), variable diameter shaped seamless steel pipe (code named BJ). Heterotypic seamless steel tubes are widely used in various structures, tools and machine parts. Compare with tube, tube generally has a larger moment of inertia and section modulus, has a greater ability to resist bending and torsional can greatly reduce the structural weight, steel.