Hollow Structural Section

ASTM-A500-Hollow-structural-section-square-pipe-SHS

Overview of Hollow Structural Section

When you think of robust, efficient, and versatile steel products, Hollow Structural Sections (HSS) should be at the forefront. Hollow Structural Section, also known as hollow section or tube, refers to the high-strength welded steel tubing used as structural elements in buildings and other structures and a variety of manufactured products.

HSS, available in circular, rectangular, or square cross-sections, are rapidly gaining traction in the global building industry. In fact, in the United States alone, they account for about 18% of the structural steel market. Whether you’re eyeing architecturally exposed structural steel, truss structures, or basic vertical bracing elements, HSS stands out as a top choice. Their adaptability extends beyond construction; they’re also ideal for scaffolding, bridges, staircases, furniture designs, and more.

With an impressive strength-to-weight ratio, economic benefits, and simplicity compared to other steel products, HSS promises to revolutionize your construction and design projects, delivering both functionality and aesthetic appeal. As a go-to choice in various industries, HSS provides durable and reliable solutions for a multitude of applications.

Available Sizes of Hollow Structural Section

schematic-diagram-of-pipe-dimension

HSS offers you a comprehensive range of shapes and sizes, ensuring you find the perfect fit for your project. Whether you’re in need of circular hollow sections (CHS), rectangular hollow sections (RHS), or square hollow sections (SHS), there’s a variant tailored to your requirements.

Some HSS products adhere to A1085 standards, ensuring enhanced weathering performance and longevity in various environmental conditions. Some adhere to American Institute of Steel Construction (AISC) standards to ensure the quality and reliability of HSS.

Square HSS:

  • Range: 20mm*20mm-400mm*400mm
  • Thickness:1.5mm-12.5mm

Rectangular HSS:

  • Width:25mm-300mm
  • Height:50mm-500mm

Circular HSS:

  • Diameter: Common sizes range from 0.5 inches up to 24 inches.
  • Wall Thickness: Usually ranges from 0.065 inches to 0.500 inches.

 

Each type boasts its unique benefits, properties, and purposes. For instance, CHS is renowned for its clean lines and smoothness, while RHS offers a sleek form and clean shape, making it structurally sound for certain applications. SHS, on the other hand, strikes a balance between strength, functionality, and aesthetic appeal. If your desired size or shape isn’t readily available, rest assured that HSS can be effortlessly cut and modified to your exact specifications, ensuring you never have to compromise on your vision.

SizesWeightHeightWidthW. T.
[kg/m][mm][mm][mm]
20 x 20 x 2 SHS1.120202
20 x 20 x 2.5 SHS1.320202.5
25 x 25 x 2 SHS1425252
25 x 25 x 2.5 SHS1.725252.5
25 x 25 x 3 SHS225253
30 x 30 x 2 SHS1.730302
30 x 30 x 2.5 SHS2.130302.5
30 x 30 x 3 SHS2.530303
40 x 40 x 2.5 SHS2.940402.5
40 x 40 x 3 SHS3.440403
40 x 40 x 3.2 SHS3.640403.2
40 x 40 x 3.6 SHS440403.6
40 x 40 x 4 SHS4.440404
40 x 40 x 5 SHS5.340405
50 x 50 x 2.5 SHS3.750502.5
50 x 50 x 3 SHS4.450503
50 x 50 x 3.2 SHS4.650503.2
50 x 50 x 3.6 SHS5.150503.6
50 x 50 x 4 SHS5.650504
50 x 50 x 5 SHS6.950505
50 x 50 x 6 SHS850506
50 x 50 x 6.3 SHS8.350506.3
60 x 60 x 2.5 SHS4.560602.5
60 x 60 x 3 SHS5.360603
60 x 60 x 3.2 SHS5.660603.2
60 x 60 x 3.6 SHS6.360603.6
60 x 60 x 4 SHS6.960604
60 x 60 x 5 SHS8.460605
60 x 60 x 6 SHS9.960606
60 x 60 x 6.3 SHS10.360606.3
60 x 60 x 8 SHS12.560608
70 x 70 x 3 SHS6.270703
70 x 70 x 3.2 SHS6.670703.2
70 x 70 x 3.6 SHS7.470703.6
70 x 70 x 4 SHS8.270704
70 x 70 x 5 SHS1070705
70 x 70 x 6 SHS11.870706
70 x 70 x 6.3 SHS12.370706.3
70 x 70 x 8 SHS1570708
80 x 80 x 3 SHS7.280803
80 x 80 x 3.2 SHS7.680803.2
80 x 80 x 3.6 SHS8.580803.6
80 x 80 x 4 SHS9.480804
80 x 80 x 5 SHS11.680805
80 x 80 x 6 SHS13.680806
80 x 80 x 6.3 SHS14.280806.3
80 x 80 x 8 SHS17.880808
90 x 90 x 5 SHS13.190905
90 x 90 x 6 SHS15.590906
90 x 90 x 6.3 SHS16.290906.3
90 x 90 x 8 SHS20.190908
100 x 100 x 3.6 SHS10.81001003.6
100 x 100 x 4 SHS11.91001004
100 x 100 x 5 SHS14.71001005
100 x 100 x 6 SHS17.41001006
100 x 100 x 6.3 SHS18.21001006.3
100 x 100 x 8 SHS22.61001008
100 x 100 x 10 SHS27.410010010
120 x 120 x 4 SHS14.41201204
120 x 120 x 5 SHS181201205
120 x 120 x 6 SHS21.21201206
120 x 120 x 6.3 SHS22.21201206.3
120 x 120 x 8 SHS27.61201208
120 x 120 x 10 SHS33.712012010
120 x 120 x 12 SHS39.512012012
120 x 120 x 12.5 SHS40.912012012.5
140 x 140 x 5 SHS211401405
140 x 140 x 6 SHS24.91401406
140 x 140 x 6.3 SHS26.11401406.3
140 x 140 x 8 SHS32.61401408
140 x 140 x 10 SHS4014014010
140 x 140 x 12 SHS4714014012
140 x 140 x 12.5 SHS48.714014012.5
150 x 150 x 5 SHS22.61501505
150 x 150 x 6 SHS26.81501506
150 x 150 x 6.3 SHS28.11501506.3
150 x 150 x 8 SHS35.11501508
150 x 150 x 10 SHS43.115015010
150 x 150 x 12 SHS50.815015012
150 x 150 x 12.5 SHS52.715015012.5
150 x 150 x 16 SHS65.215015016
160 x 160 x 5 SHS24.11601605
160 x 160 x 6 SHS28.71601606
160 x 160 x 6.3 SHS30.11601606.3
160 x 160 x 8 SHS37.61601608
160 x 160 x 10 SHS46.316016010
160 x 160 x 12 SHS54.616016012
160 x 160 x 12.5 SHS56.616016012.5
160 x 160 x 16 SHS70.216016016
180 x 180 x 5 SHS27.31801805
180 x 180 x 6 SHS32.51801806
180 x 180 x 6.3 SHS341801806.3
180 x 180 x 8 SHS42.71801808
180 x 180 x 10 SHS52.518018010
180 x 180 x 12 SHS62.118018012
180 x 180 x 12.5 SHS64.418018012.5
180 x 180 x 16 SHS80.218018016
200 x 200 x 5 SHS30.42002005
200 x 200 x 6 SHS36.22002006
200 x 200 x 6.3 SHS382002006.3
200 x 200 x 8 SHS47.72002008
200 x 200 x 10 SHS58.820020010
200 x 200 x 12 SHS69.620020012
200 x 200 x 12.5 SHS72.320020012.5
200 x 200 x 16 SHS90.320020016
220 x 220 x 6 SHS402202206
220 x 220 x 6.3 SHS41.92202206.3
220 x 220 x 8 SHS52.72202208
220 x 220 x 10 SHS65.122022010
220 x 220 x 12 SHS77.222022012
220 x 220 x 12.5 SHS80.122022012.5
220 x 220 x 16 SHS10022022016
250 x 250 x 5 SHS38.32502505
250 x 250 x 6 SHS45.72502506
250 x 250 x 6.3 SHS47.92502506.3
250 x 250 x 8 SHS60.32502508
250 x 250 x 10 SHS74.525025010
250 x 250 x 12 SHS88.525025012
250 x 250 x 12.5 SHS91.925025012.5
250 x 250 x 16 SHS11525025016
260 x 260 x 6 SHS47.62602606
260 x 260 x 6.3 SHS49.92602606.3
260 x 260 x 8 SHS62.82602608
260 x 260 x 10 SHS77.726026010
260 x 260 x 12 SHS92.226026012
260 x 260 x 12.5 SHS95.826026012.5
260 x 260 x 16 SHS12026026016
300 x 300 x 6 SHS55.13003006
300 x 300 x 6.3 SHS57.83003006.3
300 x 300 x 8 SHS72.83003008
300 x 300 x 10 SHS90.230030010
300 x 300 x 12 SHS10730030012
300 x 300 x 12.5 SHS11230030012.5
300 x 300 x 16 SHS14130030016
350 x 350 x 8 SHS85.43503508
350 x 350 x 10 SHS10635035010
350 x 350 x 12 SHS12635035012
350 x 350 x 12.5 SHS13135035012.5
350 x 350 x 16 SHS16635035016
400 x 400 x 8 SHS97.94004008
400 x 400 x 10 SHS12240040010
400 x 400 x 12 SHS14540040012
400 x 400 x 12.5 SHS15140040012.5
400 x 400 x 16 SHS19140040016
400 x 400 x 20 SHS23540040020

Typical Production Standards of Hollow Structural Section

Our HSS sections conform to the following globally recognized specifications:

ASTM Standards

  • ASTM A500: This standard covers cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. It specifies the chemical composition, mechanical properties, dimensions, and tolerances for HSS.
  • ASTM A501: This standard covers hot-formed welded and seamless carbon steel structural tubing. It is less common than A500 but provides guidelines for similar properties and applications.
  • ASTM A1085: This standard provides specifications for cold-formed welded carbon steel hollow structural sections for improved performance in seismic and other demanding applications. It has tighter tolerances and enhanced strength and ductility requirements compared to ASTM A500.

EN Standards (European Standards)

  • EN 10210-1 & EN 10210-2: These standards cover hot finished structural hollow sections of non-alloy and fine grain steels. They specify requirements for hot-formed HSS, including chemical composition, mechanical properties, and dimensional tolerances.
  • EN 10219-1 & EN 10219-2: These standards cover cold-formed welded structural hollow sections of non-alloy and fine grain steels. They outline specifications for cold-formed HSS, including the manufacturing process, mechanical properties, and dimensions.

JIS Standards (Japanese Standards)

  • JIS G 3466: This standard covers carbon steel square and rectangular tubes for general structural purposes. It specifies the manufacturing process, chemical composition, mechanical properties, and dimensions for HSS.

HSS Tube Steel Sizes and Shapes

The primary shapes of HSS include square, rectangular, and circular sections.

Square HSS

  • Width/Height: 1″ x 1″ to 16″ x 16″
  • Wall Thickness: 0.065″ (1.65 mm) to 0.625″ (15.88 mm)

Rectangular HSS

  • Width: 2″ to 20″
  • Height: 1″ to 12″
  • Wall Thickness: 0.065″ (1.65 mm) to 0.625″ (15.88 mm)

Circular HSS

  • Outside Diameter (OD): 0.84″ to 24″
  • Wall Thickness: 0.065″ (1.65 mm) to 0.500″ (12.7 mm)

HSS Steel for Construction

Hollow Structural Sections (HSS) are widely used in construction due to their versatile shapes, high strength-to-weight ratio, and aesthetic appeal.

  • Buildings: Used in columns, beams, and frames for residential, commercial, and industrial buildings. The high strength and aesthetic appeal of HSS make it a popular choice for modern architectural designs.
  • Bridges: Employed in trusses, girders, and supports in bridge construction. The high strength-to-weight ratio and durability of HSS are advantageous in bridge engineering.
  • Infrastructure: Utilized in various infrastructure projects such as sign supports, guardrails, and pipelines. HSS provides the necessary strength and durability for these applications.

Benefits of Hollow Structural Sections (HSS)

Hollow Structural Sections (HSS) offer numerous benefits in construction and structural engineering, making them a popular choice for various applications.

1. High Strength-to-Weight Ratio

HSS provides excellent strength while being relatively lightweight compared to solid sections. This efficiency reduces the overall weight of structures, which can lower construction costs and foundation requirements.

2. Structural Efficiency

The closed shape of HSS provides uniform strength in all directions, making them highly efficient for resisting bending, torsion, and axial loads. This uniformity is particularly beneficial in columns and beams subjected to multi-directional forces.

3. Aesthetic Appeal

HSS has a clean, smooth appearance that is often preferred in architectural designs. They can be easily incorporated into exposed structures, providing an aesthetically pleasing and modern look.

4. Versatility in Design

HSS comes in various shapes (square, rectangular, circular, elliptical) and sizes, allowing for a wide range of design possibilities. This versatility helps architects and engineers achieve both functional and creative design objectives.

5. Ease of Fabrication

HSS can be easily cut, welded, and connected, facilitating efficient fabrication and assembly. This ease of handling can lead to faster construction times and reduced labor costs.

6. Durability and Longevity

The enclosed shape of HSS provides better resistance to environmental factors such as corrosion and weathering compared to open sections. This durability extends the lifespan of structures and reduces maintenance needs.

7. Improved Buckling Resistance

The closed section of HSS enhances its resistance to buckling under compression loads, making them ideal for use as columns and other load-bearing members in structures.

8. Reduced Surface Area

HSS has a smaller surface area compared to equivalent open sections, which can reduce the amount of protective coating needed for corrosion resistance. This reduction can lead to cost savings in materials and maintenance.

How to Select the Right Hollow Structural Section

Selecting the right HSS for your project can seem daunting, but with our guidance, it becomes a seamless process. Begin by understanding the specific requirements of your project. Are you looking for strength, aesthetic appeal, or perhaps both? For projects requiring extensive joining and welding, RHS might be your best bet due to its flat surfaces. If you’re aiming for a balance between strength and visual appeal, consider the SHS. Remember, the key is to match the HSS’s properties with your project’s needs. Consider factors like the environment it will be used in, potential weight loads, and desired lifespan. With UNIACERO by your side, you’re not just purchasing steel; you’re investing in a partnership that prioritizes your success. We’re here to ensure you benefit from the unmatched versatility, efficiency, and beauty that HSS brings to the table.

HSS Steel Custom Solutions from UNIACERO

UNIACERO provides customized HSS products to meet specific project requirements, and all products meet or exceed industry standards such as ASTM, EN, and ISO, ensuring reliability and quality.

Custom Sizes and Shapes:

  • Shapes: UNIACERO can produce HSS in various shapes, including square, rectangular, and circular sections.
  • Sizes: We offer flexibility in dimensions to match project specifications, catering to unique structural needs.

Material Options:

  • Steel Grades: UNIACERO provides HSS in different steel grades, depending on the required mechanical properties and applications. This includes high-strength and corrosion-resistant steels.
  • Finishes: Custom finishes are available to enhance durability and appearance, including galvanized, painted, or coated surfaces.

Fabrication and Processing Services:

  • Cutting and Welding: Precise cutting and welding services to ensure the HSS fits perfectly within the structural framework.
  • Drilling and Punching: Custom drilling and punching for connection points, simplifying on-site assembly.
  • Bending and Forming: Advanced bending and forming capabilities for creating complex shapes and curved sections.

Engineering Support:

  • Design Assistance: UNIACERO provides engineering support to help design efficient and cost-effective HSS solutions. This includes structural analysis and optimization to ensure safety and performance.
  • Custom Specifications: Tailored solutions based on detailed project requirements, including load calculations, environmental conditions, and specific design criteria.

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

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