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Help CenterFiberglass Rectangular Tube Used in Cooling Tower Frames UV Stabilized
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Hengshui Ruibin New Materials LLC is a professional manufacturer specializing in pultruded fiberglass profiles. Our Fiberglass Rectangular Tube is specifically engineered for use in cooling tower frames, offering outstanding structural performance under harsh outdoor conditions. The tube is UV stabilized to resist sunlight degradation, ensuring long-term durability in direct sunlight. With a factory spanning 1,000–3,000 square meters and an annual export value exceeding US$2.5 million, we deliver consistent quality to clients across North America, Europe, Southeast Asia, and more.
This product is pultruded from high-quality E-glass fiber and thermosetting resin, combined with a specially formulated UV barrier layer. The result is a lightweight yet strong structural component that outperforms traditional steel or aluminum in corrosive environments. Whether you are constructing new cooling towers or upgrading existing frames, our fiberglass rectangular tube provides a reliable, maintenance-free solution.
Below we detail the key features, technical specifications, benefits, and answer common buyer questions.
Key Features & Benefits
- UV Stabilized Surface – A thickened UV-resistant gel coat prevents yellowing and surface cracking, extending service life in outdoor applications.
- High Strength-to-Weight Ratio – 75% lighter than steel but with comparable tensile strength (up to 350 MPa). Reduces structural load and simplifies installation.
- Corrosion Resistance – Impervious to moisture, chemicals, and salt spray, making it ideal for wet cooling tower environments.
- Low Thermal Conductivity – Eliminates thermal bridging and condensation problems common with metal frames.
- Electrical Insulation – Non-conductive, enhancing safety in power plant and industrial settings.
- Customizable Dimensions – Available in various rectangular cross-sections, wall thicknesses, and lengths (up to 12 meters).
- Easy Fabrication – Can be cut, drilled, and assembled on site with standard tools.
- Fire Retardant Options – We offer formulations meeting UL94 V-0 or other fire standards upon request.
Technical Specifications
| Property | Typical Value |
| Tensile Strength (longitudinal) | ≥ 300 MPa |
| Flexural Modulus | ≥ 20 GPa |
| Density | 1.6 – 2.0 g/cm³ |
| Operating Temperature Range | -40°C to +80°C |
| Water Absorption | < 0.5% by weight |
| UV Resistance (ASTM D4329) | ≥ 5000 hours no significant degradation |
| Color Options | Gray, white, green, or custom RAL |
Why Choose Hengshui Ruibin New Materials?
We are a manufacturer with over 5 years of experience in pultrusion technology, serving clients worldwide. Our factory employs 101–200 skilled workers and operates under strict quality control. With an annual export value between US$2.5 million and US$5 million, we have established reliable supply chains to major markets including North America, Europe, Oceania, and the Middle East.
Our commitment to quality is reflected in our continuous improvement processes. Each batch of fiberglass rectangular tubes undergoes dimensional checks, UV performance tests, and mechanical property verification before shipment. We ship from the Port of Tianjin or Port of Qingdao, ensuring efficient logistics to any global destination.
Choose our product for your cooling tower frames and benefit from a lightweight, corrosion-proof, and long-lasting alternative to metal. Contact us today for a quote or technical support – we are ready to customize dimensions and surface finish to meet your project requirements.
Frequently Asked Questions (FAQ)
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Q: Can this fiberglass rectangular tube be used directly in water contact inside cooling towers?
A: Yes, the tube is completely resistant to moisture and chemicals typically found in cooling tower water. The UV stabilized surface also prevents degradation from sunlight exposure above the water line. -
Q: What is the maximum length you can produce?
A: Our standard length is 6 meters, but we can produce custom lengths up to 12 meters per piece. For special projects, jumbo rolls or continuous lengths can be discussed. -
Q: Are there fire-retardant versions available?
A: Yes, we can incorporate flame retardant additives to meet different fire safety standards. Please specify your required rating (e.g., UL94 V-0, Class 1) when ordering. -
Q: How do I choose the correct wall thickness for my frame?
A: Recommendations depend on span length, load bearing requirements, and wind/snow loads. We provide engineering support and typical deflection calculations. For most cooling tower support frames, 3mm to 6mm wall thickness is common. -
Q: Can I paint or further treat the surface?
A: The UV gel coat already provides excellent weather resistance. If painting is desired, we recommend light sanding and using an acrylic or polyurethane paint. Otherwise, the natural color holds well for years. -
Q: Do you offer samples for testing?
A: Yes, we can supply small sample pieces (e.g., 30 cm length) for evaluation. Please contact our sales team to arrange a sample order. Shipping costs are typically borne by the buyer. -
Q: What is the typical lead time for bulk orders?
A: For standard sizes and colors, lead time is 15–25 days after confirmation of order. Custom dimensions or special treatments may require 30–40 days. We will confirm exact schedule upon order. -
Q: How do your prices compare to aluminum or galvanized steel?
A: Our fiberglass rectangular tube is often cost-competitive on a per-project basis when considering total lifetime costs (no corrosion maintenance, lighter weight reduces installation cost, longer service life). We recommend getting a quote for your specific dimensions for accurate comparison.
For any further questions or to request a custom quotation, please reach out to our professional team at Hengshui Ruibin New Materials LLC. We look forward to supporting your cooling tower projects with reliable fiberglass solutions.
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