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Seamless steel pipe is a type of steel pipe with no joints around its cross-section, made through processes such as hot rolling, cold rolling, cold drawing, and extrusion. Its core advantage lies in the hollow section design, which is suitable for fluid transportation and high-strength structural scenarios, and has no weld defects on the surface, resulting in better mechanical performance. Stainless steel seamless steel pipes have corrosion resistance on this basis, but the processing cost is relatively high.
keyword Seamless Steel Pipe Category Other Related products Get a quoteComprehensive analysis of seamless steel pipes
1. Definition and Characteristics
Seamless steel pipe is a type of steel pipe with no joints around its cross-section, made through processes such as hot rolling, cold rolling, cold drawing, and extrusion. Its core advantage lies in the hollow section design, which is suitable for fluid transportation and high-strength structural scenarios, and has no weld defects on the surface, resulting in better mechanical performance. Stainless steel seamless steel pipes have corrosion resistance on this basis, but the processing cost is relatively high.
2. Classification and production process
According to production methods, it can be divided into hot-rolled tubes, cold-rolled tubes, cold drawn tubes, extruded tubes, etc. Different processes correspond to different dimensional accuracies and uses.
According to usage, it includes two categories: general use (water conveyance, structural components) and specialized use (boilers, geological exploration, acid resistance, etc.).
3. Material and specifications
Common materials: carbon structural steel (such as 10 #, 20 #), alloy steel (such as 16Mn, Q355E/D, 15CrMoG, 12Cr1MoVG, A335P11, P91, P5, etc.), low-temperature steel (A333 Gr.6, etc.), pipeline steel (B~X100) (L245~L690), and stainless steel.
Size range: The outer diameter of hot-rolled seamless steel pipes is usually greater than 426mm (for larger diameters, two expansion processes are required, up to a maximum of over 1 meter), and the wall thickness is 3-80mm; Cold rolled pipes have higher precision and are suitable for precision fields.
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