Hollow Section Steel Pipe

What is Hollow Section Steel Pipe?

The hollow section steel pipe is the general name of the steel pipe with other section shapes except the circular pipe. It includes non-circular cross-section profile, equilateral wall thickness, variable wall thickness, variable diameter and variable wall thickness along the length direction, symmetrical and asymmetric section, etc. such as square, rectangular, conical, trapezoidal, spiral, etc. The special-shaped steel pipe can adapt to the particularity of the use conditions, save metal and improve the labor productivity of parts manufacturing. It is widely used in aviation, automobile, shipbuilding, mining machinery, agricultural machinery, construction, textile and boiler manufacturing. Cold drawing, welding, extrusion and hot rolling are the methods of producing special-shaped tubes. Compared with the circular tube, the special-shaped tube generally has larger moment of inertia and section modulus, and has greater bending and torsion resistance, which can greatly reduce the weight of the structure and save steel.

Standard,   Application of Hollow Section Steel Pipe
1ASTM A500Cold Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
2ASTM A501Hot-Formed Welded and Seamless Carbon Steel Structural Tubing
3ASTM A511Seamless Staniless Steel Mechanical Tubing
4ASTM A513Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing
5ASTM A554Welded Stainless Steel Mechanical Tubing 
6ASTM A618Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing
7EN 10210Hot Finished Structural Hollow Section of Non-alloy and Fine Grain Structural Steels
8EN 10219Cold Formed Welded Structural Hollow Sections of Non-alloy and Fine Grain Steel
9EN 10305-5Steel Tubes for Precision Applications-Welded and Cold Sized Square and Rectangular Tubes
10GB/T 3094Cold Drawn Shaped Steel Tubes
11GB/T 34201Seamless Hot-Rolled Square and Rectangular Steel Tubes for Structure
12JIS G3446Stainless Steel Pipe for Machine and Structural Purposes