welded-square-tube-2020mm--200200mm-for-structural-steel-frameworks, welded-square-tube-2020mm--200200mm-for-structural-steel-frameworks, /secondary-steel-structure
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• Material: Integral closed structure brings superior torsional resistance.
• Effect: Flat four-side bearing surface facilitates easier site assembly.
Product Description
Xingyuanxing Carbon Steel Square Pipe, also known as square hollow section, is a high-quality hollow metal profile specially developed for various steel structure engineering. Manufactured via cold forming and precise welding technology, this square tube features neat edges, uniform wall thickness and stable geometric dimension. We supply raw black square tube and hot dipped galvanized square pipe to satisfy different anti-corrosion demands of construction projects
Different from circular steel pipes and solid steel bars, square tube supply owns flat four-side bearing surface, more convenient for surface drilling, welding and connecting. It can realize neat assembly effect without complicated processing. The integral closed structure brings excellent torsional resistance and load-bearing capacity, becoming a preferred structural material for industrial buildings
Hot dipped galvanized square pipe forms compact zinc coating on steel surface after high-temperature galvanizing treatment. The coating tightly combines with substrate to block air and water erosion, greatly improving rust resistance. Raw black square pipe is cost-effective, suitable for projects with follow-up painting, spraying and secondary anti-corrosion treatment
As standardized structural hollow section, square tube supply has stable physical performance, uniform internal stress and low deformation rate under long-term load. Products go through straightening, flaw inspection and size calibration after forming. It can cooperate with color steel plates, C/Z purlins to form complete steel structure building system for factories and warehouses
Square hollow steel pipe is widely adopted for workshop steel frames, equipment supports, safety guardrails, outdoor platform brackets, temporary construction frames and enclosure supports. It is an essential structural material for factory new construction, warehouse expansion and facility upgrading
The square tube from Xingyuanxing is produced with tight dimensional tolerances, uniform wall thickness, and superior surface finish. Each square tube supply unit benefits from advanced forming and welding processes that ensure straightness, square corners, and minimal residual stresses
Xingyuanxing selects high-grade steels and applies tailored surface treatments so that the square tube performs well in varied environments. As a corrosion-resistant square tube, finishes such as galvanizing, zinc coatings, and specialized paints are available to extend service life in humid, coastal, or chemically aggressive conditions
Xingyuanxing invests in process innovations that translate into reliable square tube supply. Cold-forming techniques paired with automated welding and real-time inspection systems reduce variability and ensure consistent mechanical properties throughout production lots. The result is a square tube supply that minimizes field surprises and supports repeatable structural calculations. Non-destructive testing and dimensional verification at multiple stages reinforce quality claims and deliver square tube supply packages that conform to project specifications
The square tube’s geometry provides efficient moment of inertia characteristics compared with other hollow sections, producing predictable bending and torsional responses. This makes the square tube a preferred option for steel framing trends that emphasize modularity and prefabrication
Xingyuanxing’s square tube supply addresses a wide range of applications. In building construction, the square tube is used for framing, bracing, and architectural screening. In infrastructure projects, the square tube offers reliable performance for guardrails, barriers, and support frames. The square tube supply also meets needs in furniture manufacturing, industrial racking, and equipment enclosures where uniform cross-sections and precise lengths are essential
As steel framing trends evolve toward lighter, faster, and more sustainable solutions, Xingyuanxing positions its square tube supply to support these shifts. The square tube integrates readily with prefabricated modules, reducing on-site labor and accelerating schedules
One of Xingyuanxing’s strengths is its ability to offer customized square tube supply to match project-specific requirements. Lengths, gauge, coatings, and cut-and-drill services are available to streamline installation. Reliable inventory management and logistical planning ensure that the square tube supply reaches projects on schedule, reducing delays and site storage conflicts
Flat Four-Side Structure, Easy Connection & Installation — Regular square shape provides flat welding and contact surfaces. Drilling, cutting and assembly operations are simple, effectively shortening on-site construction time.
High Torsion Resistance & Strong Load Capacity — Closed hollow section design balances self-weight and structural strength. Higher bending resistance compared with equal weight flat steel, reducing overall project load.
Two Surface Types Optional, Flexible Matching Schemes — Select raw black square pipe for secondary painting construction; choose hot-dipped galvanized square tube for direct outdoor use with long-term anti-rust effect.
Uniform Wall Thickness & Straight Tube Body, Less Processing Waste — Precise forming technology ensures consistent wall thickness and straight pipe body. Small dimensional tolerance, low cutting loss and high material utilization rate.
Excellent Weather Adaptability For Multiple Scenarios — Galvanized square tube adapts to outdoor open-air environment, rain and humidity. Suitable for inland factories, logistics yards and coastal projects with proper specification selection.
Rich Complete Specifications, Support Custom Length Cutting — Complete size inventory for conventional square tubes. According to construction drawing requirements, fixed-length cutting service is provided to avoid redundant material waste for customers.
Good Weldability & Machinability — Stable carbon steel substrate guarantees reliable welding effect. It can be processed by bending, punching, drilling to meet customized production of brackets and frames
| Parameter Item | Standard Configuration Parameters( |
| Base Material | Q235B Carbon Steel |
| Surface Type | Raw Black Square Pipe, Hot Dipped Galvanized Square Pipe |
| Common Side Size | 20×20mm ~ 200×200mm,support customization |
| Usual Wall Thickness | 1.2mm ~ 10mm |
| Standard Length | 6m, 9m, 12m; customized cutting available |
| Zinc Layer Thickness(Galvanized Type) | 40g-500g |
| Execution Standard | GB/T 6728, ISO Standard |
| Processing Service | Fixed-length cutting, punching, end flatting |
Steel Structure Workshop Main & Secondary Frame — Used for factory support frame, partition bracket, roof auxiliary support, matched with purlins and wall panels to build industrial buildings.
Warehouse & Logistics Park Support System — Suitable for goods rack support, awning framework, platform guardrail and outdoor enclosure bracket of storage facilities.
Safety Guardrail & Fence Engineering — Ideal material for factory perimeter fence, channel guardrail, stair handrail and isolation barrier.
Mechanical Equipment Base & Support Frame — Applied for machine bottom support, equipment protective frame, temporary work platform bracket.
Outdoor Billboard & Awning Frame — Galvanized square tube preferred for open-air billboard skeleton, sunshade and carport frame with anti-rust demand.
Professional Specification Recommendation — According to load requirement, service environment and construction drawings, recommend proper side size and wall thickness to control project cost reasonably.
Standardized Production & Stable Quality — Raw materials purchased from large steel mills, online size inspection during forming. Strict appearance sorting before packaging to avoid deformed and defective pipes.
Customized Processing Support — Provide fixed-length cutting, punching, deburring and other deep processing services, reduce secondary workload for buyers.
Complete Material Certificates Supplied — Mill test certificate can be offered for project bidding and engineering acceptance as required.
Factory Direct Supply With Sufficient Stock — Conventional sizes keep continuous inventory, bulk orders can be arranged in batches to coordinate construction schedule.
Q1: What is the difference between black square pipe and hot-dipped galvanized square tube?
Raw black square pipe has no anti-rust coating, low unit price, and needs painting or spraying after installation. Hot dipped galvanized square pipe forms zinc coating on surface, excellent outdoor rust resistance, can be directly used outdoors without extra anti-corrosion treatment.
Q2: Can square tube be cut into arbitrary length?
Yes. We support customized cutting according to your drawing demands. Please inform us of exact length and tolerance requirements in advance. Extra cutting fee will be charged according to processing quantity.
Q3: What information should be offered for accurate quotation?
Kindly confirm material grade, surface type (black / galvanized), side size, wall thickness, required length, total quantity and whether processing services are needed.
Q4: Is Q235B square tube suitable for coastal areas?
Q235B hot dipped galvanized square pipe can be used in coastal regions. We suggest selecting thicker zinc coating to resist salt spray corrosion and prolong service life.
Q5: Can square tube be used for load-bearing equipment support?
Yes. Please provide load data and span size. We will recommend matched wall thickness and side dimension to guarantee structural safety.
Q6: Will galvanized square tube produce zinc spatter during welding?
English: Zinc vapor will generate during welding galvanized square tube. It is suggested to take ventilation protection measures during construction. Local zinc layer can be repaired with zinc-rich paint after welding.
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