1. Guojian specializes in the R&D of protective piping for photovoltaic (PV) applications. Rather than serving as primary load-bearing beams for carports, these Round Steel Tube are designed for perimeter fencing and lightweight upright supports, with optimized wall toughness and superior surface corrosion resistance.
2. The fully rounded profile eliminates right-angled "dead zones," allowing rainwater and dust to slide off naturally. This design prevents the accumulation of grime and surface corrosion during long-term outdoor exposure, making maintenance significantly easier than with square tubing.
3. A uniform-speed barrel galvanizing process ensures consistent zinc coating thickness across the inner walls and tube ends. This avoids common issues found in square tubes—such as thin coatings at corners and peeling—making the product highly suitable for coastal PV sites exposed to high-salinity environments.
4. With an in-house precision processing workshop, we offer customized fabrication for guardrails and uprights—including deburring, threading, transverse drilling, and beveling. Consistent machining precision ensures seamless on-site welding and assembly without the need for secondary grinding.
5. The tubes undergo toughness enhancement, making them resistant to cracking or denting from minor impacts. When used for PV plant perimeter fencing, they effectively withstand collisions from vehicles and flying debris, thereby reducing long-term maintenance and replacement costs.
6. Products can be supplied as a complete package alongside PV square tubes, mounting clamps, and helical ground screws. This one-stop solution covers both primary load-bearing and secondary structural components, simplifying procurement planning and logistics coordination for contractors.
Hot-dip galvanized Round Steel Tube are hollow carbon steel pipes—available in both straight-seam welded and seamless varieties—that undergo high-temperature hot-dip galvanizing to protect both their inner and outer surfaces from corrosion. Unlike square or rectangular tubes used for long-span load-bearing beams, round tubes feature a streamlined, low-wind-resistance profile. They are primarily used for lightweight vertical supports, site perimeter fencing, and small equipment mounts, serving as a core structural component in PV plant perimeter protection systems.
The circular cross-section allows airflow to pass smoothly; in high winds, it avoids the strong wind-pressure loads that pull on fence posts, ensuring that large-scale ground-mounted PV fences—whether in mountainous or flat terrain—remain stable and resistant to tilting or deformation over the long term.
The absence of sharp corners prevents uneven zinc coating accumulation, ensuring the zinc layer fully encapsulates the tube wall; this significantly extends service life in corrosive environments—such as coastal areas or chemical industrial parks—and reduces the need for future refurbishment or maintenance.
Rainwater easily washes away surface deposits like mud, sand, and saline residue; unlike the grooves in square tubing that trap wastewater, this design minimizes surface corrosion at the source.
The material offers superior elongation properties compared to standard profiles; impacts from site vehicles or debris cause only minor deformation rather than catastrophic breakage, drastically lowering daily maintenance costs for PV sites.
Bevels and threaded ends are standardized and pre-fabricated to meet assembly and post-installation needs; workers can assemble and weld immediately upon arrival, eliminating on-site grinding and drilling steps and shortening the overall installation schedule.
Small-diameter, thin-walled tubes suit residential-scale PV fencing, while thick-walled, large-diameter round tubes serve as load-bearing posts for surveillance and energy storage equipment; supplies can be sourced in specific quantities based on project requirements, avoiding the need for bulk stockpiling.
1. Perimeter security fencing and internal zone-dividing railings for large-scale ground-mounted PV power plants
2. Support poles for surveillance cameras, warning signs, and lighting fixtures within the PV site
3. Simple support posts for outdoor energy storage inverters and box-type substations
4. Protective fencing and livestock/poultry enclosures for industrial sites and "agrivoltaic" (agriculture-plus-solar) projects
5. Temporary site enclosures and safety guardrails for construction
1. Raw material selection: Distinguishing between welded and seamless pipes, and matching wall thickness to specific uses (e.g., support poles vs. guardrails)
2. Forming and appearance inspection: Correcting pipe straightness and rejecting defective units with ovality or uneven wall thickness
3. Galvanizing layer spot-checks: Focusing on zinc coating thickness at pipe ends and inner walls to address common issues like missed coating at the ends
4. Post-processing dimensional verification: Full inspection of threading, hole spacing, and bevel angles to ensure precise assembly
5. Finished product protection and packaging: Plastic end caps for individual pipes and waterproof film wrapping to prevent impact damage or scratches to the galvanized layer during transport
A: Round pipes are preferred for general site perimeter fencing and support poles due to lower wind resistance and superior corrosion durability; hot-dip galvanized square/rectangular pipes are used for load-bearing structures like PV carports and large-scale mounting main beams. They serve different purposes and can be used in combination.
A: Standard beveling and deburring are free; threading and multi-row hole drilling are calculated based on processing volume, with processing fees waived for large-volume PV fencing orders.
A: Standard galvanizing is sufficient for inland use; for coastal areas with high salt-spray exposure, we offer customized thicker hot-dip galvanizing to extend the outdoor service life of the pipes.
A: There is no minimum order quantity for standard small-diameter guardrail pipes, and small quantities for residential PV fencing can be shipped in smaller batches; custom large-diameter, heavy-duty posts require a minimum order of 500 meters.
A: Yes. Our factory supplies matching flange connectors that allow the round posts to connect perfectly with helical ground anchors, providing a complete, one-stop protective system.
1. Packaging: Plastic protective caps are fitted to both ends of each pipe; pipes of the same specification are bundled with steel straps and wrapped in waterproof stretch film to prevent transport-related friction or abrasion of the zinc coating;
2. Logistics: Export orders can be shipped via container from the Port of Tianjin;
3. After-sales: All pipes undergo multiple quality inspections before leaving the factory; replacements are provided free of charge for quality issues such as coating detachment or dimensional deviations; technical staff provide free layout plans and post-installation configurations for PV fencing.
1. Specialized focus on PV protective piping; deep familiarity with construction standards for PV site fencing and posts ensures product selection aligns precisely with PV engineering requirements;
2. Distinct processing techniques for guardrails versus posts—avoiding the use of generic profiles—results in superior installation outcomes;
3. Comprehensive PV accessory supply—including pipes, connectors, ground anchors, and clamps—from a single factory; unified coordination reduces the costs associated with multi-party communication;
4. Ample stock availability; priority production scheduling for urgent PV fencing orders ensures site completion and grid connection timelines are met;
5. Complete acceptance documentation provided, ready for immediate use in PV supervision, project bidding, and export customs declarations.
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No. 2, Expressway Auxiliary Road, South Area of High-tech Industrial Park, Zitai Economic and Technological Development Zone, Tianjin, China
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