FRP Profile Rectangular Tube and Square Tube
lightweight, high-strength, corrosion-resistant solution
(Direct sales from the manufacturer | Customization supported | Corrosion-resistant FRP tube)
FRP rectangular tubes and square tubes are lightweight and high-strength structural materials made from fiberglass reinforced plastic (FRP) through pultrusion. They are widely used in corrosive environments such as chemical industry, electric power, and marine engineering, replacing traditional metal pipes and solving industry pain points such as rust and aging.
Feature and Advantage
- Strong corrosion resistance: can withstand acid, alkali, salt, organic solvents and other media, with a service life of more than 20 years (3-5 times that of metal pipes).
- Light weight and high strength: the density is only 1/4 of steel, and the tensile strength is ≥300MPa.
- Insulation and anti-static: the surface resistance can be customized to 10³~10⁸Ω to meet the requirements of explosion-proof environment.
- Low maintenance cost: no painting, no scaling, and the annual maintenance cost is reduced by more than 60%.
Product features and performance parameters
Product features and performance parameters
1. Core performance
Lightweight and high strength: density 1.6-2.0g/cm³, strength 2-3 times that of steel, tensile strength ≥300MPa.
Corrosion resistance: can withstand acid and alkali environments with pH 3-11, and no corrosion after 5000 hours of salt spray test.
Insulation and flame retardant: dielectric strength ≥15kV/mm, oxygen index ≥28 (UL94 V-0 grade).
Long life: outdoor service life ≥20 years, maintenance-free cost.
2. Dimensions (customization supported)
| Type | Regular Size（mm） | Wall Thickness（mm） | Length（m） |
|---|---|---|---|
| FRP Square Tube | 20×20 – 400×400 | 3-20 | 6/12 |
| Rectangular Square Tube | 50×30 – 500×200 | 5-25 | 6/12 |
- Customized service and delivery guarantee
Flexible customization: support non-standard size (±5% adjustment), color (RAL color card optional), surface texture (glossy/matte). - Fast delivery: regular products are shipped within 7 days, and urgent orders are responded to within 72 hours.
- Quality inspection standards: third-party inspection reports are provided for each batch (including mechanical properties and corrosion resistance tests).
Application areas of FRP Profiles-Round Tube
- Chemical and environmental protection: acid mist purification tower bracket, sewage treatment pool guardrail (replacement of 316L stainless steel).
- Marine engineering: desalination pipeline, dock anti-corrosion grille (resistant to salt spray corrosion).
- Power communication: cable tray, insulated ladder (flame retardant insulation properties).
- Rail transit: subway ventilation ducts, platform anti-collision columns (lightweight design).
Production process and technical advantages
1. Core process: pultrusion technology
Raw materials: high-purity resin (epoxy/unsaturated polyester) and alkali-free glass fiber are mixed in precise proportions.
Process: fiber dipping → mold preforming → high temperature curing → traction cutting → surface treatment.
Parameters: curing temperature 150-200℃, traction speed 0.5-2m/min, to ensure that the product is dense and free of bubbles.
2. Technical advantages
Automated production: full CNC equipment ensures dimensional accuracy (error ≤0.5mm).
Environmentally friendly process: zero VOC emissions, in line with GB/T 31539-2015 standards.
High Strength
The specific strength of FRP is higher than that of steel, and the hoop tensile strength can reach more than 300MPa.
Corrosion Resistance
It can resist corrosion from chemical media such as acids, alkalis, salts, and organic solvents, and its service life is more than 30 years.
Light Weight
The density is only 1/4 of that of steel pipes, which is convenient for transportation and installation.
Low Friction Coefficient
The inner wall is smooth (roughness coefficient 0.0084), the hydraulic performance is excellent, and the conveying efficiency is high.
Good thermal insulation
Low thermal conductivity (0.25W/m·K), reducing heat energy loss.
Anti-aging&Electrical insulation
Anti-ultraviolet agent is added, suitable for outdoor and harsh environments. Non-conductive, suitable for power, communication and other fields.
OUR PROJECT
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Why to choose us?
- Military-grade quality control: ISO 9001 certified.
- Full life cycle service: Provide installation guidance + 1-year warranty.
- Successful case endorsement: Serving 300+ leading companies such as Sinopec and Three Gorges Group.