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Hollow Section

“Hollow section” (HSS: Hollow Structural Section) refers to a structural shape with a hollow section, usually made of steel. It has the properties of steel, such as high strength, stiffness and corrosion resistance.

In manufacturing and construction, a hollow section is a hollow steel tube or profile. It can be round, square, rectangular, or another shape. This structural shape of tubes or profiles is commonly used in a variety of engineering and construction projects. such as used in components or structures made of metal, plastic, concrete, etc.

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Specifications of Hollow Structural Section

The pipe manufacturing process makes a precise hollow section. It is strong enough to ensure the structure’s integrity. The production standards are strictly followed in manufacturing. It is available in different steel grades as well. For rust prevention, special coatings are also used. These hollow sections are highly efficient and are used in various engineering applications.

Name	Hollow Section
Standard	API, ASTM, BS, EN, JIS, DIN…
Shape	Round, Square, Rectangular
Steel Material	Carbon steel, Alloy steel, Stainless steel, Ductile Iron
Length	3m, 5.8m, 6m, 11.8m, 12m or customized
Wall Thickness	1.24mm -59.54mm or customized
Tolerance	As per different standard
Manufacturing Process	ERW, LSAW, SSAW, SMLS
Pipe Ends	Plain End, Beveled End, Threaded, Grooved
Pipe Surface	Varnishing, Oiling, Hot Dip Galvanizing, Pre Galvanized, FBE, 2PP, 3PP, 2PE, 3PE
Joint Method	Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Application	Structure, Construction, Oil, Gas and Water transport, Mining, Sprinkler, Green House…

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Types of Hollow Structural Section

Square Hollow Section (SHS)

Square hollow section (SHS) is a type of structural steel pipe. It is similar to RHS and CHS in characteristics, appearance, and structural behavior.

SHS has a flat surface that makes joining and welding easier. Commonly used in construction and bridge projects.

Rectangular Hollow Section (RHS)

Rectangular hollow sections (RHS) are often used in mechanical, structural, and construction work, just like square hollow sections.

The pipe’s flat surface is more cost-effective for joining and other fabrication work.

Circular Hollow Section (CHS)

With a round cross-section, it provides uniform compressive and tensile properties. Widely used in pipelines, bridges, parts and other fields.

CHS are often used in architecture for their attractive look. They suit many applications.

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Specification of Square Square Hollow Section

NAME: Square Steel Pipe

STANDARD: ASTM A500, EN10219, EN10296

GRADE: GR.A, GR.B, GR.C Q195, Q235B, Q345B

Size of Square Hollow Sections (SHS)

size	Thickness	Size	Thickness
19×19	1.0-2.0	125×125	2.5-30
20×20	1.0-2.0	127×127	2.5-15
25×25	1.0-3.0	130×130	2.5-15
30×30	1.0-3.75	140×140	2.5-30
32×32	1.0-3.75	150×150	2.5-30
35×35	1.0-3.75	160×160	2.5-30
38×38	1.2-6.0	180×180	2.5-30
40×40	1.2-6.0	200×200	2.75-30
45×45	1.2-6.0	225×225	2.75-30
50×50	1.2-6.0	250×250	3.5-17.75
55×55	1.3-6.0	300×300	4.75-17.75
60×60	1.3-6.0	350×350	4.75-30
65×65	1.3-6.0	400×400	4.5-30
70×70	1.3-6.0	450×450	4.5-30
75×75	1.3-9.75	500×500	4.5-30
80×80	1.3-9.75
85×85	1.3-9.75
90×90	1.3-9.75
100×100	1.5-16
110×110	2.5-30
120×120	2.5-30

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What is Hollow Structural Section?

“Hollow Section” (HSS: Hollow Structural Section) refers to welded steel tubes. It is used as a structural element in buildings and other structures, and in various 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. After size formation and seam welding, the tube is cut to length to make a single piece of pipe.

The hollow structural section is a low-cost, lightweight material. It 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.

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Advantages Of Using Hollow Section

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:

Benefits Of Using Hollow Sections_lowest price

Cost SavingHollow sections’ geometric shape allows for efficient distribution of materials, resulting in lighter structures compared to traditional solid beams. This can lead to cost savings in terms of transportation and construction.

Benefits Of Using Hollow Sections_Aesthetic Appeal

Aesthetic AppealHollow sections often have a modern and aesthetically pleasing appearance, making them a preferred choice in architectural and design-focused applications.

Benefits Of Using Hollow Sections_Corrosion Resistance

Corrosion ResistanceFor steel hollow sections, proper coatings or galvanization can provide excellent corrosion resistance, extending the lifespan of the structure in challenging environments.

Benefits Of Using Hollow Sections_Reduced Buckling

Reduced BucklingThe closed cross-sectional shape of hollow sections provides greater resistance against buckling and distortion under loads, enhancing structural stability.

Benefits Of Using Hollow Sections_Ease of Connection

Ease of ConnectionHollow tube can be easily connected using welding or mechanical connections. Their uniform shapes simplify joining processes compared to more complex connections needed for W-beams.

Carbon Steel Pipe Manufacturer_Sustainability

Efficient Use of SpaceHollow sections can be used for integrated functions, such as housing electrical or plumbing systems within the hollow space, optimizing space utilization.

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Hollow Section Manufacturing Process

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

Hollow Structural Sections Applications

In welded steel frames and columns, hollow structural section are often employed. Because of their enormous strength, they are also frequently employed as steel support beams. Especially rectangular sections are often used in welded steel frames when components are loaded from multiple directions. Square and circular hollow sections are very effective for this multiple-axis loading. They have the same shape along two or more axes. So, they have uniform strength properties. This makes them suitable for columns. They are also extremely torsion-resistant.