Hollow Section


Hollow Section

Hollow Sections are hollow structural steels, which are very popular in the construction and engineering industries.Hollow Sections are available in a variety of shapes: Circular Hollow Section, CHS, Square Hollow Section, SHS, Rectangular Hollow Section, RHS. Rectangular Hollow Section, RHS).
Hollow Sections have the following characteristics: light weight, high strength, good torsional properties, and easy to connect. The multiple advantages make it widely used in engineering design.

Hollow Structural Section Specification

Here you can see the specification of Hollow Section in terms of length, wall thickness, dimensions, compression resistance, etc. PANDAPIPE specializes in the production of Hollow Section, including Circular Hollow Section, Square Hollow Section, Rectangular Hollow Section and other specifications, below is the Hollow Section specification chart, if you have any questions, please contact us. Hollow Section, including Circular Hollow Section, Square Hollow Section, Rectangular Hollow Section and other specifications, the following is the Hollow Section specification chart, if you have any questions, please contact us!

NameHollow Section
StandardAPI, ASTM, BS, EN, JIS, DIN…
ShapeRound, Square, Rectangular
Steel MaterialCarbon steel, Alloy steel, Stainless steel, Ductile Iron
Length3m, 5.8m, 6m, 11.8m, 12m or customized
Wall Thickness1.24mm -59.54mm or customized
ToleranceAs per different standard
Manufacturing ProcessERW, LSAW, SSAW, SMLS
Pipe EndsPlain End, Beveled End, Threaded ,Grooved
Pipe SurfaceVarnishing, Oiling, Hot Dip Galvanizing, Pre Galvanized, FBE, 2PP, 3PP, 2PE, 3PE
Joint MethodFitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
ApplicationStructure, Construction, Oil, Gas and Water transport, Mining, Sprinkler, Green House…

Hollow Structural Section Types

Hollow Structural Sections(HSS)  are popular in the construction and engineering industry because of their many shapes. The main types are Circular Hollow Section(CHS),Square Hollow Section(SHS),Rectangular Hollow Section(RHS). Below we will introduce the characteristics and uses of different pipe sizes, hope it will be helpful to you.

Square Hollow Section (SHS)?

Advantage: square, all right-angled edges
Characteristics: Higher symmetry compared to RHS, more conducive to joining and welding. Uniform surface, suitable for coating.
Application: Commonly used in frame structures of buildings, brackets of manufacturing equipment, etc.

What is Rectangular Hollow Section (RHS)?

Advantages: rectangular shape, different lengths on both sides of the edge
Characteristics: Great bending strength, especially when loaded with long sides. But also due to its asymmetry, the load capacity changes
Application: For load-bearing beams, door frames, machine frames and structures requiring strength in different directions.

What is Circular Hollow Section (CHS)?

Advantages: symmetrical shape, can accept forces from all directions, balanced performance under load.
Characteristics: excellent torsional and rotational properties, good mechanical properties, can do fluid transportation
Applications: construction, support. Railing and other occasions that require uniform force

How is Hollow Section Made?

The roll forming process is used to produce hollow sections for construction projects. The coil is continually twisted by the forming rollers and then shaped into circular sections and finally square as well as rectangular section shapes.


Hollow Section(HSH) Applications

In welded steel frames and columns, hollow steel sections are often employed. Because of their enormous strength, they are also frequently employed as steel support beams. Especially rectangular sections are frequently utilized in welded steel frames when components are subjected to loading from several directions. Because they have identical geometry along two or more cross-sectional axes and consequently uniform strength properties, square and circular hollow sections are extremely effective forms for this multiple-axis loading. This makes them suitable for columns. They are also extremely torsion-resistant.

Steel Fabrication


Solar Energy

Mechanical Engineering

Why Hollow Sections Better Than W-Beams?

Any steel construction with hollow sections gains strength and attractiveness. Employing hollow sections for building and structural purposes has various advantages over using W-beams, from cost savings to flexibility:

Cost Saving

Cost control is critical in every building project. The use of Hollow Structural Sections results in considerable weight reductions, which in turn leads to significant material cost savings. Simply said, it needs less steel to accomplish the same function. Working with hollow sections requires less steel to support a given load, which immediately correlates to material cost reductions. 

Finally, when unpainted weathering steel is selected in conjunction with the Hollow Structural Section, you get a double dose of cost savings on the original construction as well as further life cycle cost reductions owing to the very low continuing maintenance expenses as compared to a painted structure. You will also save money on transportation, handling, and erection charges when there is less weight involved.


Hollow sections, both weathering and non-weathering, are widely accessible from many steel wholesalers and may be easier to locate for your project than W-Beams.


Because there are so many different sizes of W-beams, choosing the right one for your application might be difficult. There are only 40-60 square and rectangular tube diameters made with hollow portions. Fabrication is further simplified by the straight sides of square and rectangular tubes or hollow sections.

What is Hollow Section?

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The term “Hollow Section” (HSS: Hollow Structural Section) refers to welded steel tube that is utilized as structural elements in buildings and other structures, as well as a variety of manufactured items. It is commonly manufactured using hot-rolled coils. Slitting the coils to the appropriate width for the manufactured portion and then shaping them to the final shape required. Following size formation and seam welding, the tube is cut to the necessary length to make a single piece of pipe.

This item is a low-cost, lightweight material that is easy to weld, mold, punch, and drill. Its hollow design covers and protects wires, pipelines, and moving parts but allows them to be exposed. Additionally, it can be substituted for solid steel goods such as I-Beams and Wide Flange.