Seamless steel pipe is a long strip of steel with a hollow cross-section and no seams around it. Seamless steel pipes have a hollow cross-section and can be used as pipelines for transporting fluids, such as oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, seamless steel pipes are lighter in weight when their bending and torsional strength is the same. They are an economical section steel and are widely used in the manufacturing of structural and mechanical parts, such as petroleum drill rods, automotive transmission shafts, bicycle frames, and steel scaffolding used in construction. Manufacturing circular parts with seamless steel pipes can improve material utilization, simplify manufacturing processes, save materials and processing time, such as rolling bearing rings, jack sleeves, etc. Currently, steel pipes are widely used for manufacturing. Steel pipes are still an indispensable material for various conventional weapons, and gun barrels and barrels need to be made of steel pipes. Steel pipes can be divided into round pipes and irregular pipes according to their cross-sectional area and shape. Due to the fact that under the condition of equal perimeter, the circular area is the largest, and circular pipes can transport more fluid. In addition, when the circular section is subjected to internal or external radial pressure, the force is relatively uniform, so the vast majority of steel pipes are circular. However, circular pipes also have certain limitations. For example, under the condition of planar bending, circular pipes are not as strong as square and rectangular pipes in terms of bending strength. Some agricultural machinery skeletons, steel and wood furniture, etc., commonly use square and rectangular pipes. Special shaped steel pipes with other cross-sectional shapes are required for different purposes.
1. Seamless steel pipes for structural purposes (GB/T8162-2008) are seamless steel pipes used for general structures and mechanical structures.
2. Seamless steel pipe for fluid transportation (GB/T8163-2008) is a general seamless steel pipe used for transporting fluids such as water, oil, and gas.
3. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are used to manufacture various structures for overheating of low and medium pressure boilers
High quality carbon structural steel hot-rolled and cold drawn (rolled) seamless steel pipes for steam pipes, boiling water pipes, and locomotive boiler superheated steam pipes, large smoke pipes, small smoke pipes, and arch brick pipes.
4. Seamless steel pipes for high-pressure boilers (GB/T5310-2017) are high-quality carbon steel, alloy steel, and stainless heat-resistant steel seamless steel pipes used for manufacturing heating surfaces of water tube boilers with high pressure and above.
5. High pressure seamless steel pipes for fertilizer equipment (GB6479-2013) are high-quality carbon structural steel and alloy steel seamless steel pipes suitable for chemical equipment and pipelines with working temperatures of -40~400 ℃ and working pressures of 10~30 Ma.
6. Seamless steel pipes for petroleum cracking (GB9948-2013) are seamless steel pipes suitable for furnace tubes, heat exchangers, and pipelines in petroleum refining plants.
7. Steel pipes for geological drilling (YB235-70) are steel pipes used by geological departments for core drilling, which can be divided into drill rods, drill collars, core pipes, casing pipes, and sedimentation pipes according to their uses.
8. Seamless steel pipe for diamond core drilling (GB3423-82) is a seamless steel pipe used for drilling rods, core rods, and casings in diamond core drilling.
9. Oil drilling pipe (YB528-65) is used for thickening the inner or outer ends of oil drilling.
10. Carbon steel seamless steel pipes for ships (GB5213-85) are carbon steel seamless steel pipes used in the manufacture of Class I pressure resistant pipe systems, Class II pressure resistant pipe 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 not exceed 450 ℃.
11. Seamless steel pipe for automotive half axle sleeve (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe used for manufacturing automotive half axle sleeves and drive axle axle housing shaft pipes.
12. High pressure oil pipes for diesel engines (GB3093-2002) are cold drawn seamless steel pipes used in the manufacture of high-pressure pipes for diesel engine injection systems.
13. Precision inner diameter seamless steel pipes for hydraulic and pneumatic cylinder barrels (GB8713-2009) are cold drawn or cold-rolled precision seamless steel pipes with precision inner diameter dimensions used in the manufacturing of hydraulic and pneumatic cylinder barrels.
14. Cold drawn or cold-rolled precision seamless steel pipes (GB/T3639-2009) are precision seamless steel pipes with high dimensional accuracy and good surface smoothness used in mechanical structures and hydraulic equipment.
15. Seamless stainless steel pipes for structural purposes (GB/T14975-2002) are hot-rolled (extruded, expanded) and cold-drawn (rolled) seamless steel pipes made of stainless steel, which are widely used in industries such as chemical, petroleum, light textile, medical, food, machinery, and other corrosion-resistant pipes and structural components.
16. Seamless stainless steel pipes for fluid transportation (GB/T14976-2002) are hot-rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipes made of stainless steel for fluid transportation.
17. Irregular seamless steel pipe is a general term for seamless steel pipes with other cross-sectional shapes except for circular pipes. According to the different cross-sectional dimensions of steel pipes, they can be divided into equal wall thickness irregular seamless steel pipes (code D), unequal wall thickness irregular seamless steel pipes (code BD), and variable diameter irregular seamless steel pipes (code BJ). Specially shaped seamless steel pipes are widely used in various structural components, tools, and mechanical components. Compared with circular pipes, special-shaped pipes generally have larger moments of inertia and cross-sectional modulus, as well as greater bending and torsion resistance, which can greatly reduce structural weight and save steel.
New Gapower Metal is a professional seamless steel pipe manufacturer. The main products include precision steel tube, oil/gas tube, cylinder tube, heat exchange tube,galvanized steel tube, tube for car etc. Customers could find all the type tube that they needed.
Post time: Nov-30-2023