Views: 0 Author: Site Editor Publish Time: 2025-09-23 Origin: Site
When it comes to modern construction and steel fabrication, the role of steel tubes cannot be overstated. Among the different profiles available, Circular Hollow Sections Steel Tube For Construction has become one of the most versatile and dependable options. From large-scale infrastructure projects to smaller commercial structures, these tubes provide strength, clean aesthetics, and reliability. At Tianjin Friend Steel Group, we provide a wide range of CHS solutions designed to help procurement managers, site engineers, and estimators make confident choices for their projects. This guide will walk through the main selection factors—size, wall thickness, material grade, and surface finish—so you can identify the right fit and move quickly toward inquiry and purchase.
Selecting a CHS does not need to be complicated. With a few quick checks, you can know whether circular sections are the right solution for your project.
Are your needs primarily structural, aesthetic, or both?
Will the tube carry axial loads as a column, resist bending as a beam or brace, or handle torsion where round sections excel?
Is the steel exposed outdoors, in a marine environment, or buried underground?
Do you require minimal maintenance over the structure’s life?
Does the design call for a seamless, uniform look compared to square or rectangular sections?
If most of these apply, CHS will likely serve as the most efficient option.
Choosing the correct dimensions starts with understanding the type of loading your CHS will face. The combination of load direction, wall thickness, and diameter determines both performance and cost efficiency.
Circular sections are naturally efficient at handling axial loads. This makes them an excellent choice for columns in warehouses, towers, or bridges. For members under bending, such as beams or bracing, larger diameters with thicker walls provide better stiffness and reduced deflection. CHS is also ideal for torsional resistance, where its closed shape outperforms open sections like angles or channels.
Engineers often calculate loads in kilonewtons or tons, but procurement managers need this converted into workable size recommendations. For example, a light column in a small industrial building might be safely designed with a 114 mm diameter and 4–6 mm thickness, while heavier axial loads in multistory frames could call for 219 mm or larger diameters with 10–12 mm thickness. For bracing members subject to both bending and compression, intermediate sizes such as 168 mm with 8 mm thickness often provide the right balance of economy and safety.
Beyond size and thickness, safety factors must be built into your selection. Buckling checks are essential for longer members, especially those acting as slender columns. Connections—whether welded, bolted, or sleeved—affect performance as well. Ensuring compatible end details in your purchase order can prevent costly modifications on-site.
Not all CHS tubes are equal, even with the same dimensions. Material grade and surface finish are crucial for long-term durability.
At Tianjin Friend Steel Group, we supply grades such as Q234, Q275, and Q345. Q234 is a reliable general-purpose grade, often sufficient for low-rise commercial structures. Q275 offers improved strength, making it suitable for medium-load applications. Q345, with its higher yield strength, is preferred for demanding projects where load-bearing capacity is critical.
The surface finish impacts corrosion resistance and maintenance needs:
Mild black: economical, often used indoors or where protective coatings will be applied later.
Hot-dip galvanized: provides excellent corrosion resistance, perfect for outdoor, coastal, or humid conditions.
Pre-galvanized: a lighter alternative for medium corrosion protection.
Painted: suitable where aesthetic color finishes are required.
Galvanized CHS in particular saves on maintenance costs, extending service life and reducing future repainting. After welding, it is important to specify touch-up with zinc-rich coatings to maintain full corrosion protection.
Practical details in handling CHS often make the difference between smooth project execution and unexpected challenges.
Welding after galvanizing: possible but requires proper venting and fume extraction. It is often better to fabricate before galvanizing.
Cutting and shaping: CHS cuts cleanly but dimensional tolerances should be checked. Order within ISO or EN standards to avoid surprises.
Joint types: circular profiles work best with fishmouth or saddle cuts for direct tube-to-tube welding. Plate end connections can also be specified for ease.
On-site handling: although durable, larger CHS members are heavy. Proper lifting points should be integrated to avoid deformation.
Quality control checkpoints: before delivery, check roundness, wall thickness uniformity, straightness, and surface condition. Including these in your purchase order ensures consistent quality.
Circular Hollow Sections are produced in a wide range of diameters and wall thicknesses. At Tianjin Friend Steel Group, our CHS products cover:
Sizes: 15–400 mm diameters
Thickness: 1.0–16 mm
Shapes available: Circular (CHS), Rectangular (RHS), Square (SHS)
For clarity in purchasing, a sample line item might look like:
CHS, 168 mm diameter × 8 mm thickness, Grade Q345, Hot-dip galvanized, 12 m length
Minimum order quantities start at 25 tons, and our standard delivery time is within 30 days after deposit. Packaging can be arranged in bundles with steel straps, seaworthy wrapping, or customized to your freight requirements. With global shipping experience, we ensure smooth delivery to markets in Asia, the Middle East, Australia, Europe, and the Americas.
Before finalizing your order, here are answers to common buyer questions:
Do I need galvanized tubes? → Yes, if the structure is outdoors, near water, or needs low maintenance.
Can tubes be cut to length? → Yes, customized lengths can be supplied to reduce waste on-site.
What is the typical delivery length? → Most projects use 6 m or 12 m, but special lengths can be produced.
What standards do the products meet? → We supply to international standards with strict quality checks.
Can I mix CHS with RHS and SHS in one order? → Yes, we provide all hollow section shapes in one consolidated shipment.
Checklist for your purchase order:
Diameter and thickness
Material grade (Q234 / Q275 / Q345)
Surface finish (black / galvanized / painted)
Length requirement
Tolerance or special QC requests
Quantity (meeting MOQ of 25 tons)
Circular Hollow Sections Steel Tube For Construction continues to prove its value across industries by offering strength, versatility, and clean design. With Tianjin Friend Steel Group’s extensive product range, consistent quality, and reliable delivery, you can specify the exact CHS needed for your project with confidence. Our team is ready to assist you with technical support, price quotations, and logistics solutions. Contact us today to request your tailored quotation and experience why buyers worldwide trust our steel solutions.
